Gaithersburg 2 WNW Maryland – weather summary for NJWO Blog and Weathershelter

APRIL 2016 – GAITHERSBURG 2 WNW MARYLAND
BRIEF SUMMARY STATISTICS FOR WEATHER SHELTER AND THE NJWO BLOG by Kevin Shaw, Observer in charge

Average high temperature 66.5° (+ 0.3°)
Average low temperature 43.4° (+ 1.7°)
Mean temperature 54.9° (+ 0.9°)
Precipitation 1.79″ (- 1.87″) Greatest daily amount (date) 0.81″ (7)
Year to date precipitation 12.76″ (- 0.92″)
Snowfall T (- 0.4″) Greatest daily amount (date) T (9)
Greatest depth of snow (date) T (9)
Seasonal snowfall (2015-2016) 37.9″ (+9.1″)
High temperature for the month (date) 84° (18)
Low temperature for the month (date) 27° (6)
Highest barometric pressure (date) 30.51″ (17)
Lowest barometric pressure (date) 29.40″ (2)
Peak wind gust (date/direction): 32 (3/WSW) Heating degree days for the month: 320
Cooling degree days for the month: 18
Greatest diurnal range (date): 38.4° (18) Least diurnal range (date) 7.2° (30)

Fog days: 4
Snow days: 1
Glaze: 0
Thunder: 0
Sunny/clear days: 13 Partly Cloudy days: 10 Cloudy days: 7

Days with measurable precipitation (=>.01″) = 10
Days with maximum temperatures of 80 or more = 5
Days with minimum temperatures of 32 or less = 3

APRIL 2016 MONTHLY SUMMARY
GAITHERSBURG 2 WNW MARYLAND
by Kevin Shaw, observer in charge

April 2016 was a dry, slightly warmer than normal month with much more of an emphasis on the low precipitation total rather than the temperatures. There has been a lack of dry Aprils in my 37 period of record (POR), so this modestly dry month is
now coming in as my third driest April since 1979 when my
records for April start. Naturally no daily precipitation
record amounts were set, as the wettest day of 0.81″ on the
7th didn’t come close to the all-time daily record for that
date. Even though temperatures were pretty close to normal,
there were a few extremes that set daily records. The 83°
on the 1st set the only daily record high temperature for the date, and there were two record high minimum temperature
records set, the 2 warmest low temps for the month, both
in the 60s that beat the old record significantly. 64° was
the low temperature on the 1st and the 22nd that set daily
record high minimum temperatures. There were 5 days with
maximum temperatures of 80° or greater, and 3 days with
minimum temperatures below freezing. Both values are pretty
close to average I believe, though I don’t really compile a
statistic for the 80° max. Snow did fall (a trace) on the 9th which is the 22nd April out of 37 to have at least a trace.

The average maximum temperature for the month was 66.5°
(+0.3°), the average minimum temperature was 43.4° (+ 1.7°). The resultant mean average temperature for the month was
54.9° (+ 0.9°). It was not nearly as warm a month when
compared to March in relation to to the long-term averages.

The month’s total precipitation amount of 1.79″ was 1.87″
below the normal April amount of 3.66″. Precipitation was
spread out on 10 of the 30 days of April, with a 10 day period of no rain (13th-22nd). Most of the month’s rain fell on the first 12 days and the last few days of the month. Speaking of streaks, those last 3 days of the month kicked off a streak of daily rain that is still intact through May 9. More on that with the May report. 10 days of measurable precipitation for the
month was a bit below the long-term normal amount of 11.3 days. Total snowfall for the month of a trace was 0.4″ below the long term April average of 0.4″.

The month’s highest barometric pressure reading of 30.51″ on the 17th occurred near the beginning of the 10 day dry spell which also brought on 70s and 80s high temperatures. The lowest pressure reading of the month was 29.40″ on the 2nd occurred during a colder, damper period with light precipitation amounts that featured our highest peak winds gusts of the month.

The distribution of 13 sunny, 10 partly cloudy and 7 cloudy days fit in the dry pattern a bit better than in March. The sunny days naturally mostly occurred during that 10 day dry, warm streak between the 13th and 22nd.

There were 320 heating degree days (HDD) and 18 cooling degree days. There were an about normal amount of 4 days with fog with no other special observation phenomena noted. The peak wind gust during the month was 32 MPH out of the WSW on the 3rd, behind a strong frontal passage in the middle of the windiest period of the month, with 4 of the month’s 8 PWG values over 20 MPH and the top three during the first 4 days of the month.

My maximum temperature frequencies included 5 days of 80° or more, 9 days between 70° and 79°, 7 days between 60° and 69°, 7 days between 50° and 59°, and 2 days between 40° and 49°. On the minimum temperature frequency side of things, there were 3 days between 20° and 29°, 8 days between 30° and 39°, 12 days between 40° and 49°, 5 days with minimums between 50° and 59°, and 2 days with minimums of 60° or greater.

The diurnal range average was a bit below normal (23.1° vs the normal of 24.6°). The max daily range of 38.4° occurred on the 18th in the middle of our 10 day dry streak and the peak of the greatest hot spell of the month when the monthly max temp was reached (84°- 46°). There were an additional 7 days with daily ranges in the 30° – 39° range. The lowest daily temperature range of 7.2° occurred on the 30th near the beginning of our consecutive wet day period still currently running. There was a total of 4 days during April with daily temperature ranges of less than 10°.

April 2016 wound up a fairly typical transitional month from some winter-like conditions at the beginning of the month to more summer-like conditions near the end. Springtime green-up and tree blossom season was pretty close to normal this year. But there was a notable lack of convective activity in April, but that has picked up a bit in early May so far. Stay tuned in a few weeks for the May report. We have started out wet and cool so far in early May. For my own personal preference considerations, I hope we can maintain that pattern for as long as possible to keep us out of the heat and humidity that is inevitable eventually during the coming weeks.


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Reisterstown City Maryland Weather Summary for April 2016

Reisterstown City Maryland Weather Summary for April 2016
by Ray Muller, SKYWARN and CoCoRAHS weather observer

Temperature
Maximum for month 82° at 1601 on April 26
Minimum for month 24° at 0507 on April 6
Minimum maximum for month was 46° at 1858 on April 9
Maximum minimum for month was 62° at 0655 on April 26

Precipitation
Monthly total amount 2.47″
Year to date amount 13.84″
Maximum amount in 12 hours 0.52″ on April 7
Maximum amount in 24 hours 1.20″ on April 7
Number of days of measurable amounts:
.01″ = 13
.10″ = 7
.50″ = 1
1.00″ = 1

Snowfall
Monthly total amount T
Yearly total amount 36.0″
Maximum amount in 24 hours T on April 9 and 10
Maximum snow depth on the ground was 0

Winds
2-minute fastest mile was 34 MPH from 320° at 2207 on April 2
Peak wind gust was 50 MPH from the Northwest at 2208 on April 2
Number of days with:
Gale-force winds = 4
Damaging winds = 0

Barometric pressure
Maximum value 30.50″ at 0757 on April 17
Minimum value 29.40″ at 1600 on April 2

Relative Humidity

Minimum value 13% at 1400 on April 24
Maximum value 100% on 5 seperate days during April

Types of weather

Fog = 12
Dense Fog = 1
Ice Pellets = 1
Thunder = 3
Haze = 8
Smoke = 2

Lowest Visibility was 1/4 mile in drizzle/fog on April 30

1900 observation averages

Sky cover 5.8 tenths
Visibility 5.0 miles
Temperature 57.4°
Dew point temperature 39.4°
Average relative humidity 51%
Wind direction and speed 290° at 8.6 MPH
Barometer 30.00″

Comments: Temperatures in the area averaged 2° – 3° above normal.
Precipitation was below normal.
Snowfall was also below normal.
On April 7, very heavy thunderstorm reduced visibility to 1/2 mile with
heavy rain, wind gusts to 35 MPH and rapidly falling barometric pressure.
The daily average peak wind gust was 25.1 MPH with the associated
prevailing daily wind direction from the west.

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Andrew Revkin Presents “Is the New Communication Climate Good for the Earth’s Climate” & NWS Spotter Training Schedule & NJWO Mtg 5-11-16 Glenn Schwartz

Now that your taxes are hopefully completed, join us at our AMS Mtg. on next Wednesday evening at Columbia University. Since there have been a myriad of climate-related stories recently that have captured the headlines, this is a perfect time to relax and listen to a prize winning science journalist tell it like it is. Hope to see you there. Check out his New York Times blog Dot Earth. http://dotearth.blogs.nytimes.com/

AMS Mtg: Wednesday, April 27, 2016, 6:30 p.m. at Columbia University (See attached for Abstract)

Andrew Revkin, Senior Fellow for Environmental Understanding, Pace University

“Is the New Communication Climate Good for the Earth’s Climate?”

Columbia University, Davis Auditorium, 412 Schapiro Center

530 W. 120th Street, New York, NY 10027

Complete directions on the 2nd page of the attached announcement flyer!

**************************************************************************************************************************************************************************************************************

Spotter Training Schedule http://www.weather.gov/okx/SkywarnTraining

Updated: April 13th 2016

Forecasters from the National Weather Service in New York City conduct storm spotter training sessions each year to help prepare spotters for the upcoming severe weather season. The training sessions are typically about three hours long and cover fundamental information that every spotter needs to know, with a focus on safety, identification of key weather features and proper reporting procedures. Most sessions are open to anyone who is interested in learning more about being a spotter, but you should check to be sure before attending a class.

All classes are free and most classes start at 7:00 pm.

Please note: A short multiple choice, true/false exam may be given at the conclusion of each class. Spotter cards with your new number will be mailed to you with a passing grade of 70% or higher.

Saturday

April 23th

2:00 PM

Suffolk County
Babylon Town Hall
200 East Sunrise Highway
Lindenhurst, NY 11757

**Note the Special time of this class**

Registration
Thursday

April 28th

7:00 PM

Rockland County
Rockland County Office of Fire and Emergency Services
35 Fireman’s Memorial Drive
Pomona, NY 10970
Registration
Monday

May 9th

6:30 PM

Westchester County
Gritten Will Library
1500 Central Park Ave
Yonkers, NY 10710
Registration
Wednesday

May 11th

7:00 PM

Fairfield County
Norwalk Fire Department – Office of Emergency Management
121 Connecticut Ave
Norwalk, CT 06854
Registration
Saturday

May 14th

11:00 AM

New London County
Salem Town Hall
270 Hartford Road
Salem, CT 06420

**Note the Special time of this class**

Registration
Wednesday

June 8th

7:00 PM

Brooklyn (Kings) County
Brookdale University Hospital and Medical Center
1 Brookdale Plaza
Brooklyn, NY 11212
Registration

TV Meteorologist Glenn Schwartz will address the North Jersey Weather Observers meeting on Wednesday May 2 at 7 p.m. at Temple Beth Or, 56 Ridgewood Road, Township of Washington, NJ 07676 (Just off the Garden State Parkway).

Mark Kramer, Chair

New York City/Long Island AMS Chapter

http://www.nws.bnl.org/meetings.html

Revkin_4-27-16.pdf

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NJWO Blog – March 2016 Weather summary – Gaithersburg 2 WNW Maryland

MARCH 2016 – GAITHERSBURG 2 WNW MARYLAND
BRIEF SUMMARY STATISTICS FOR THE NJWO BLOG
by Kevin Shaw, Observer in charge

Average high temperature 61.7° (+ 7.5°)
Average low temperature 40.3° (+ 8.5°)
Mean temperature 51.0° (+ 8.0°)
Precipitation 1.87″ (- 2.11″)
Greatest daily amount (date) 0.43″ (28)
Year to date precipitation 10.97″ (+ 0.95″)
Snowfall 1.6″ (- 2.5″)
Greatest daily amount (date) 0.8″ (3,4)
Greatest depth of snow (date) 1″ (3)
Seasonal snowfall (2015-2016) 37.9″ (+9.5″)
High temperature for the month (date) 81° (9)
Low temperature for the month (date) 26° (3)
Highest barometric pressure (date) 30.43″ (30)
Lowest barometric pressure (date) 29.53″ (1,2)
Peak wind gust (date/direction): 26 (28/WSW)
Heating degree days for the month: 435
Cooling degree days for the month: 2
Greatest diurnal range (date): 40.0° (9)
Least diurnal range (date) 5.8° (14)

Fog days: 4
Snow days: 4
Glaze: 0
Thunder: 0
Sunny/clear days: 10 Partly Cloudy days: 11 Cloudy days: 10

Days with measurable precipitation (=>.01″) = 9
Days with maximum temperatures of 32 or less = 0
Days with minimum temperatures of 32 or less = 6

MARCH 2016 MONTHLY SUMMARY
GAITHERSBURG 2 WNW MARYLAND
by Kevin Shaw, observer in charge

March 2016 was warm and dry, generally speaking. It was the
second warmest March ever, only surpassed by the record warm March of 2012. Only two record high temperatures were set
during the month, with the highest reading of the month of 81° on the 9th and 79° on the 10th setting these records, with a tied record high temperature later in the month of 78° on the 24th. Record high minimum temperature records were set on
the 10th (55°) and 11th (51°). No other temperature records
were set or tied. On the precipitation side of things, it was the seventh driest March ever – the last March that was drier was in that really warm 2012 mentioned previously. No daily
record precipitation amounts were set. The 9 days of
measurable rainfall was only a bit below the long term
average of about 11.8. The paltry 1.6″ of snow was the
least amount in March since that warm 2012 month.
Miscellaneous items for the month include a near record
6 days with minimum temperatures of 32° or lower, and
also the lowest value for the month of 26° is one of the
highest values ever recorded for the coldest March day
in a given particular year. Most all other monthly
statistics were near average including a nice balance of
10 cloudy,11 partly cloudy and 10 clear days.

Three small precipitation events occurred during the month, but did not set or tie any daily records (0.82″ on the 13th-15th, 0.35″ on the 19th, and 0.43″ on the 28th). The last one of the month occurred on the day of my highest peak wind gust of the month which did not occur during the precipitation but rather on the back side of the front when temperatures were dropping and pressure
differences were the greatest in the area. My highest pressure readings of the month occurred that day and the following 2 days. The first precipitation event featured our longest lasting rainfall spanning over 2 1/2 days, and at the end featured our lowest pressure reading of the month. The precipitation event on the 19th was a short event associated with the usual cold frontal passage, with a bit of mixed precipitation falling at the end of the event.

The average maximum temperature for the month was 61.7° (+7.5°), the average minimum temperature was 40.3° (+ 8.5°). The resultant mean average temperature for the month was 51.0° (+ 8.0°). Once again a nearly record breaking warm month that has been a more common occurrence the past few years.

The month’s total precipitation amount of 1.87″ was 2.11″ below the normal February amount of 3.98″. Precipitation was spread out on 9 of the 31 days of March, with no really notable prolonged dry or wet periods. 9 days of measurable precipitation for the month was below the long-term normal amount of 11.8 days. Total snowfall for the month of 1.6″ was 2.5″ below the long term March average of 4.1″. There were only two days with measurable snow and two days with just trace amounts.

The month’s highest barometric pressure reading of 30.43″ on the 30th occurred during our last of our warm spells of the month. The lowest pressure reading of the month was 29.53″ on the 1st and 2nd occurred during a cold, damp period with light precipitation amounts that featured our only measurable snow of the month on the 3rd-4th.

The distribution of 10 sunny, 11 partly cloudy and 10 cloudy days did not really tell the story of the drier than normal month. The cloudy days just did not produce significant precipitation amounts during the entire month.

There were 435 heating degree days (HDD) and 2 cooling degree days. There were an about normal amount of 4 days with fog observed with no other special observation phenomena noted. The peak wind gust during the month was 26 MPH out of the WSW on the 28th, behind a strong frontal passage with the greatest pressure differences of the month, as noted earlier.

My maximum temperature frequencies included 1 day of 80° or more, 8 days between 70° and 79°, 12 days between 60° and 69°, 4 days between 50° and 59°, 5 days between 40° and 49°, and 1 day between 30° and 39°. On the minimum temperature frequency side of things, there were 2 days between 20° and 29°, 11 days between 30° and 39°, 14 days between 40° and 49°, and 4 days with minimums between 50° and 59°.

The diurnal range average was below normal (21.4° vs the normal of 22.4°). The max daily range of 40.0° occurred on the 9th during our big warmup of the month to the highest temperature of the month (81°- 41°). There were an additional 7 days with daily ranges in the 30° – 39° range. The lowest daily temperature range of 5.8° occurred on the 14th during our longest rainy period of the month. There was a total of 5 days during March with daily temperature ranges of less than 10°.

March 2016 wound up the winter season with rather confusing signals with a little bit of everything, but there was a turn to warmer weather with a preponderence of warm, dry days mostly. All told, not a very interesting month for me. Stay tuned in a few weeks for the April report. We have started out pretty cold and windy so far, but that is bound to change to more springlike weather the rest of the month.


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Reisterstown City Maryland Weather Summary for March 2016

Reisterstown City Maryland Weather Summary for March 2016
by Ray Muller, SKYWARN and CoCoRAHS weather observer

Temperature
Maximum for month 80° at 1416 on March 10
Minimum for month 27° at 0535 on March 3
Minimum maximum for month was 38° at 1407 on March 4
Maximum minimum for month was 56° at 1855 on March 25

Precipitation
Monthly total amount 2.45″
Year to date amount 11.37″
Maximum amount in 12 hours 0.36″ on March 14
Maximum amount in 24 hours 0.87″ on March 14
Number of days of measurable amounts:
.01″ = 8
.10″ = 7
.50″ = 1

Snowfall
Monthly total amount 4.9″
Yearly total amount 36.0″
Maximum amount in 24 hours 2.1″ on March 4
Maximum snow depth on the ground was 0

Winds
2-minute fastest mile was 26 from 280° at 1452 on March 28
Peak wind gust was 39 MPH from the West at 1452 on March 28
Number of days with:
Gale-force winds = 3
Damaging winds = 0

Barometric pressure
Maximum value 30.36″ on March 30
Minimum value 29.54″ on March 2

Relative Humidity
Minimum value 21% at 1800 on March 18
Maximum value 100% on 9 seperate days during March

Types of weather
Fog = 10
Dense Fog = 0
Ice Pellets = 0

Comments

Temperatures in the area averaged 4° – 6° above normal.
Rainfall averaged 1.98″ below normal.
Snowfall averaged 1.4″ below normal.
Snowfall for the year has averaged 18.9″ above normal.
The daily average peak wind gust was 24.4 MPH
Lowest Visibility was 3/8 mile in drizzle/fog on March 14

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Stewartsville March 2016 Summary

StewartsvilleMarch2016Summary

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Save 4-27 (W) Columbia-Revkin-Climate Communications & 6th Tri-State Weather Conference WCSU-Danbury-CT Sat. 10-1-16

AMS Mtg: Wednesday, April 27, 2016, 6:30 p.m. at Columbia University (See attached for Abstract)

Andrew Revkin, Senior Fellow for Environmental Understanding, Pace University

“Is the New Communication Climate Good for the Earth’s Climate?”

Columbia University, Davis Auditorium, 412 Schapiro Center

530 W. 120th Street, New York, NY 10027

*************************************************************************************************************************************************************************************************************

Save Sat. Oct. 1st to attend the 6th Tri-State Weather Conference at Western Connecticut State University in Danbury(See attached)

Tri-State Weather Conferences enhance education, professional development and communication among private and public sector meteorologists, researchers, educators, students, emergency management officials, and weather enthusiasts. Since we are in the planning phases, if a weather/climatic topic or speaker interests you or you have a recommendation, please speak up and e-mail us. We would appreciate hearing from past attendees and students.

Submissions, in the form of oral presentations or posters, are being solicited before the formal invitation on high impact extreme events that affect the Tri-State region of New York, New Jersey, and Connecticut. Potential topics may include, but are not limited to, nor‘easters, winter weather, severe thunderstorms, derechos, downbursts, tornadoes, flash floods, extreme temperatures and wind speeds, tropical storms and hurricanes, climate change, and mesoscale meteorology as well as the interface between extreme events and society. Case studies, comparisons and projections for the future are encouraged.

*************************************************************************************************************************************************************************************************************

Students and K-12 teachers:

Check out the college scholarships and grants offered by the National Weather Association at http://www.nwas.org/committees/ed_comm/application/ as well as the American Meteorological Society at https://www2.ametsoc.org/ams/index.cfm/information-for/students/ams-scholarships-and-fellowships/

Mark Kramer, Chair

New York City/Long Island AMS Chapter

http://www.nws.bnl.org/meetings.html

6th Tri-State Weather Conference Save-10-1-16.pdf

Revkin_4-27-16.pdf

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February 2016 Weather summary for Gaithersburg Maryland for the NJWO Blog

FEBRUARY 2016 – GAITHERSBURG 2 WNW MARYLAND
BRIEF SUMMARY STATISTICS FOR THE NJWO BLOG
by Kevin Shaw, Observer in charge

Average high temperature 45.0° (+ 0.3°)
Average low temperature 28.7° (+ 3.5°)
Mean temperature 36.9° (+ 1.9°)
Precipitation 4.59″ (+ 1.60″)
Greatest daily amount (date) 1.13″ (24)
Year to date precipitation 9.10″ (+ 3.06″)
Snowfall 4.7″ (- 4.5″)
Greatest daily amount (date) 2.4″ (15)
Greatest depth of snow (date) 5″ (1)
High temperature for the month (date) 66° (20,28)
Low temperature for the month (date) 10° (14)
Highest barometric pressure (date) 30.61″ (19)
Lowest barometric pressure (date) 29.27″ (24)
Peak wind gust (date/direction): 26 (13/WNW)
Heating degree days for the month: 816
Cooling degree days for the month: 0
Greatest diurnal range (date): 36.9° (28)
Least diurnal range (date) 4.7° (23)

Fog days: 5
Snow days: 7
Glaze: 2
Thunder: 1
Sunny/clear days: 5 Partly Cloudy days: 12 Cloudy days: 12

Days with measurable precipitation (=>.01″) = 13
Days with maximum temperatures of 32 or less = 5
Days with minimum temperatures of 32 or less = 19

FEBRUARY 2016 MONTHLY SUMMARY
GAITHERSBURG 2 WNW MARYLAND
by Kevin Shaw, observer in charge

February was a slightly warmer (as usual due to warm minimums rather than warm max values) and significantly wetter (sixth wettest month in my 38 period of record {POR}). Snowfall was about half of normal, with just a few light snowfalls in the middle of the month and one freezing rain event that came after our biggest snow of the month on the 15th. Records were few, one of the 2 highest temperature occurrences during the month on the 20th (66°) set the only daily record high temperature, with low max records of 24° and 25° tied/set on the 13th and 14th the only other records set. Three significant precipitation events occurred during the month, but did not set or tie any daily records (0.95″ on the 3rd-5th, 1.31″ on the 15th-17th, and 1.70″ on the 23rd-25th). The latest one featured warm air at the end with summer-like skies and an early evening thunderstorm, fairly rare for February. The event in the middle of the month featured the biggest snow of the month at the start, then some significant freezing rain in the middle, then warmer rains towards the end of the event that melted all the ice and snow before the end of the day. The earliest precipitation event was not that notable with regards to summer or winter-like types of precipitation. I might add that the lowest barometric pressure of the month (29.27″) occurred late in the day on the 24th, the day of the thunderstorm.

The average maximum temperature for the month was 45.0° (+0.3°), the average minimum temperature was 28.7° (+ 3.5°). The resultant mean average temperature for the month was 36.9° (+ 1.9°). A bit of a warmer rebound from the January cold though there was a mini-cold wave this month from the 11th-15th when we had all 5 days for the month of staying below freezing all day.

The month’s total precipitation amount of 4.59″ was 1.60″ above the normal February amount of 2.99″. Precipitation was spread out on 13 of the 29 days of this leap year February month, with no really notable dry or prolonged wet periods. 13 days of measurable precipitation for the month was significantly above the long-term normal amount of 9.5 days. Total snowfall for the month of 4.7″ was 4.5″ below the long term February average of 9.2″. There were only three days with measurable snow as the other four days with snow were just trace amounts.

The month’s highest barometric pressure reading of 30.61″ on the 19th occurred during our short 3 day warmest spell of the month. The lowest
pressure reading of the month was 29.27″ on the 24th, our wettest February day complete with a thunderstorm in the early evening that day.

The distribution of 5 sunny, 12 partly cloudy and 12 cloudy days correlated pretty well with the above normal monthly precipitation total of 4.59″.

There were 816 heating degree days (HDD) and 0 cooling degree days. There were an about normal amount of 5 days with fog observed, 2 days with glaze and 1 with thunder . The peak wind gust during the month was 26 MPH out of the WNW on the 13th, in the middle of our coldest period of February. I had a total of 7 days with PWG days of 20 MPH or more, including 4 out of the last 6 days of the month.

My maximum temperature frequencies included 4 days of 60° or more, 7 days between 50° and 59°, 9 days between 40° and 49°, 6 days between 30° and 39°, and 3 days between 20° and 29°. On the minimum temperature frequency side of things, there were 4 days between 10° and 19°, 13 days between 20° and 29°, 9 days between 30° and 39°, and 3 days with a minimum of 40°.

The diurnal range average was below normal (16.4° vs the normal of 19.5°). The max daily range of 36.9° occurred on the 28th during our second big warmup of the month which started off with a below freezing minimum (66°- 29°). The lowest daily temperature range of 4.7° occurred on the 23rd during the initial very stable, cool, cloudy damp day during our wettest period of the month. We had 4 days with a diurnal range less than 10° but conversely 8 days with ranges of 20° or more, mostly at the beginning and towards the end of the month.

February 2016 was another story in contrasts compared with snowy and colder January 2016. Both months had about the same amount of precipitation, but rain rather than snow dominated the scene in February as opposed to snowy January. Unlike January’s predominantly WNW/NW/NNW flow (based on direction of peak wind gusts on each day of the month), February had roughly the same amount of days (about 10) with that basic NW/SW flow. This helped to make a rather up and down month, with roughly evenly distributed precipitation. Stay tuned in a few weeks for the March report. It should be interesting as we transition into spring.


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Stewartsville February 2016 Monthly Summary

Monthly summary for Stewartsville, NJ: February 2016

Monthly summary for Stewartsville, NJ: February 2016

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Gaithersburg 2 WNW Maryland – January 2016 climate summary by NJWO member, Kevin Shaw observer

JANUARY 2016 – GAITHERSBURG 2 WNW MARYLAND
SUMMARY STATISTICS FOR THE NJWO BLOG
by Kevin Shaw, Observer in charge

Average high temperature 40.8° (+ 0.4°)
Average low temperature 23.0° (+ 0.6°)
Mean temperature 32.4° (+ 0.5°)
Precipitation 4.51″ (+ 1.46″)
Greatest daily amt(date) 2.21″ (23)
Year to date precip 4.51″ (+ 1.46″)
Snowfall 31.7″ (+ 23.1″)
Greatest daily amt (date) 23.7″ (23)
Greatest storm total (dates) 31.0″ (22-23)
Greatest depth of snow (date) 31″ (23)
High temperature month (date) 60° (31)
Low temperature month (date) 10° (25)
Highest barometric pressure (date) 30.69″ (5)
Lowest barometric pressure (date) 29.39″ (10)
Peak wind gust (date/direction): 27 (23/NNW)
Heating degree days for the month: 1010
Cooling degree days for the month: 0
Greatest diurnal range (date): 32.5° (25)
Least diurnal range (date) 4.9° (8)

Fog days: 6
Snow days: 7
Sunny/clear days: 10 Partly Cloudy days: 10 Cloudy days: 11

Days with measurable precipitation (=>.01″) = 10
Days with maximum temperatures of 32 or less = 6
Days with minimum temperatures of 32 or less = 26

JANUARY 2016 MONTHLY SUMMARY

January started 2016 with a bang with a record-setting
snowstorm on the 22nd and 23rd. The 31.0″ total is the greatest snowstorm total in my 38 year period of record (POR). The 23.7″ that fell on the 23rd set a daily record for snowfall, and also was the largest daily snowfall amount ever recorded during my 38 POR. The 2.21″ water equivalent total for the snowfall on the 23rd was the greatest amount for the month and set a daily record for the date and is the second largest daily amount ever, only surpassed by the 3.00″ that fell back on January 30, 2013. Only a few temp records were set, the monthly max of 60 on the 31st failed to set a record, but the 58 on the 10th did set a daily record. The high min temperature of 40 on the 9th tied a daily record with 2 previous years (1998, 2006). The total monthly precipitation amount of 4.51″ came in as eighth wettest January in my 38 year POR. The max and min temperature averages were a bit above normal but by less than 1°, not really significant. No minimum temperature records were set, as the 10° minimum temperature on the 25th, caused by great radiational
cooling from the big storm’s deep snow pack, still didn’t really come close to a record. The snow pack helped chill us the rest of the month, as it remained in place through the 31st and into the beginning of February.

The average maximum temperature for the month was 41.2° (+0.4°), the average minimum temperature was 23.6° (+ 0.6°). The resultant mean average temperature for the month was 32.4° (+ 0.5°). Much more normal
wintertime temperature patterns in January than the record mild December. The most persistent pattern of temperature was the below normal period from the 18th through the 25th which surrounded our biggest weather event of the month, our monster snowstorm that fell on the 22nd and 23rd.

The month’s total precipitation amount of 4.51″ was 1.46″ above the
normal January amount of 3.05″. Precipitation fell on 9 of the 15 days from the 9th through the 23rd and was just about all the precipitation that fell the entire month with basically dry periods at the beginning (1st-8th) and the end (24th-31st) when only 0.02″ fell one day and traces on a few other days. 10 days of measurable precipitation for the month compared favorably with the long-term average amount of 11.5 days. Total snowfall for the month of 31.7″ was the second greatest amount ever recorded in January, only surpassed by the 33.5″ that fell back in 1996.

The month’s highest barometric pressure reading of 30.69 on the 5th
interestingly enough occurred on the same day as in December. The 30.69″ reading occurred in the middle of our beginning of the month long dry spell of the month (a modest 8 day streak with only 2 trace amount days) between the 1st and 8th. The lowest pressure reading of the month was 29.39″ at the end of our first wet period of the month on the 10th, as the storm center passed by close to our area. Average barometric pressure for the month was 30.05″, within .01″ if you averaged the two extreme values (30.69″ and 29.39″). Based on this month and the last 9 months of 2015, it appears there is quite a
strong correlation between these two statistics. Not sure what it really is good for, but it is interesting to study and note the relationship.

The distribution of 10 sunny, 10 partly cloudy and 11 cloudy days correlated well with the above normal monthly precipitation total of 4.51″.

There were 1010 heating degree days (HDD) and 0 cooling degree days.
That was a bit more than double the amount of HDD I had in December. There were an about normal amount of 6 days with fog observed and no thunder days. The peak wind gust during January was 27 MPH out of the NNW on the 23rd in the middle of our monster snowstorm. I had a total of 9 days in January with PWG days of 20 MPH or more, pretty windy for my normally tranquil station.

My maximum temperature frequencies included 1 day of 60°, 6 days between 50° and 59°, 12 days between 40° and 49°, 7 days between 30° and 39°, and 5 days between 20° and 29°. On the minimum temperature frequency side of things, there were 11 days between 10° and 19°, 12 days between 20° and 29°, 7 days between 30° and 39°, and 1 day with a minimum of 40°.

The diurnal range average was a wee bit below normal (17.6° vs the normal 17.8°). The max daily range of 32.5° occurred on the 25th at the beginning of our warm up after the big snow when we had our coldest morning of the month (10°). The lowest daily temperature range of 4.9° occurred on the 7th on the first day of the first wet period of the month. We had 6 days with a diurnal range less than 10° (all on or before the 23rd of the month) and 7 days with ranges of 25° or more, interspersed fairly evenly throughout the month.

January 2016 really was quite a contrast in many respects to December 2015. From no snow at all in December to record-breaking amounts in January was the biggest change, though almost totally due to the one big snowstorm of the month on the 22nd-23rd. The record-breaking warm temperatures so frequent in December went away in January and were replaced with more normal winterlike temperatures. Similarly, however, precipitation was significantly above normal in January as it was in December. However, unlike December’s total being 100% attributable to
rain, a good part of January’s precipitation consisted of snow from our monster snowstorm. Unlike December’s predominantly mild WSW/SW flow (based on direction of peak wind gusts on each day of the month), January had just about half of the days with NW/NNW/WNW flow to help bring in the colder air to the region. Stay tuned in a few weeks for the February report. I still have not gotten my 2015 annual report out yet, I hope to produce that soon.


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