Register Now for the Sixth Tri-State Weather Conference Sat 10/1

What: The Sixth Tri-State Weather Conference http://www.wcsu.edu/weatherconference/

When: Saturday, October 1, 2016

Where: Science Bldg Rm 125, Midtown Campus of Western Connecticut State University, 181 White Street, Danbury, CT

Tell: Please forward this e-mail to your weather friends, students and colleagues

Register: http://www.wcsu.edu/weatherconference/registration.asp

Registration details: The registration fee of $30 includes a continental breakfast, morning and afternoon snacks and a full buffet lunch, along with conference materials. Registrations and payments after the September 23 deadline will be accepted on a ‘space available’ basis.

Please make checks payable to WCSU and mail before the registration deadline to:

Gary Lessor
WCSU Weather Center
Western Connecticut State University
181 White Street
Danbury, CT 06810

Preliminary Sixth Tri-State Weather Conference Schedule

8:00-8:40 Register, socialize and continental breakfast.
8:40-8:50 Opening remarks
8:50-9:50 Louis Uccellini, Head of the National Weather Service (NWS), Silver Spring, MD.
9:50-10:10 Jeffrey Tongue, NOAA/NWS, New York, NY
A Paradigm Change for Meteorological Data.
10:10-10:40 Anthony Praino, I.B.M.
An integrated modeling and observing system for the study of ecology of Lake George in the Jefferson Project.
10:40-11:05 Morning break
11:05-11:40 Robert Hart. F.S.U.
The diverse roots of our beloved meteorology and the arbitrary definition of hurricane landfall & droughts (including the current one!)
11:40-12:25 Quincy Vagell, Freelance Storm chaser.
Storm Chasing: the Dangers and Excitement.
12:30-1:40 Lunch – Student Center Cafeteria
1:40-2:00 Eleanor Vallier-Talbot, NOAA/NWS, Taunton, MA
The 25th Anniversary of Hurricane Bob.
2:00-2:25 Michael Erickson, Weather Prediction Center
New Ways of Displaying Convection Allowing Ensemble Data for WPC Forecasters.
2:25-2:45 Megan Martin, Climate Central.
2:45-3:05 Afternoon break
3:05-3:25 Carlie Buccola, NOAA/NWS, New York, NY
Social Media and High Impact Weather Events: The Good, Bad, and The Ugly
3:25-3:45 Gary Conte, NOAA/NWS, New York, NY
Communicating Risk for Extreme Weather in a Changing Climate.
3:45-4:20 Dr. Joseph D’Aleo, Weatherbell
We have seen Some Wild Winters in Recent Years, Will this be another to remember?
4:20-5:00 Panel discussion with speakers.

Poster presentations:

  1. Melissa Fleming, The Weather Gamut and Studio MF. Art Can Help Broaden the Public Conversation on Climate Change.
  2. Anthony Praino, IBM. An Integrated Modeling and Observing System for the Study of Ecology of Lake George in the Jefferson Project.
  3. Eleanor Vallier-Talbot NWS Taunton, The 25th Anniversary of Hurricane Bob, a look back in time.
  4. Steven Barabas, Storm Chaser, Storm chasing vehicle.

For further information, contact Gary Lessor, Department of Physics, Astronomy, and Meteorology, Western Connecticut State University, 181 White Street, Danbury, CT 06810 (tel: 203-837-8552; email: lessorg or Mark Kramer, co-chair c/o WeatherMark LLC 914-777-1729, e-mail at nycliams

The conference is presented by the Meteorology Program at Western Connecticut State University and co-sponsored by the WestConn Student Chapter of the AMS, the New York City/Long Island Chapter of the AMS, NOAA/National Weather Service/Upton, N.Y and NOAA/National Weather Service/Taunton, MA. The purpose of the conference is to enhance education, professional development and communication among private and public sector meteorologists, researchers, educators, students, emergency management officials, and weather enthusiasts.

P.S. Excellent blog:

What Fueled Louisiana’s Deadly Flood?

DOT Earth, August 17, 2016

By former April 2016 AMS LI/NYC Speaker Andrew Revkin

http://dotearth.blogs.nytimes.com/2016/08/17/how-an-inland-brown-ocean-and-climate-change-may-have-fueled-louisianas-deadly-flood/

Mark Kramer

Co-Chair Sixth Tri-State Weather Conference

Chair New York City/Long Island AMS Chapter

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

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REISTERSTOWN MARYLAND – JULY 2016 – MONTHLY CLIMATOLOGICAL SUMMARY

JULY 2016 CLIMATOLOGICAL SUMMARY
FOR DOWNTOWN REISTERSTOWN MARYLAND
by Observer in charge/NJWO member Ray Muller

Average maximum temperature 86.5°
Average minimum temperature 69.8°
Average mean temperature 78.2°
High temperature 96° (25/1602)
Low temperature 63° (2/0658)
Max daily range in temperature 22° 93°-71° (24)
Min daily range in temperature 11° 75°-64° (3)
Min max temperature 75° (3/1632)
Max min temperature 76° (25/0604)
Max temperature of 90° or more 8

Monthly precipitation 5.14″
Year-to-date precipitation (through 7/31) 27.89″
Max rain rate in 30 minutes 0.78″ (30)
Max precipitation in 24 hours 1.56″ (29)
Number of precipitation days with .01″ or more 8
Number of precipitation days wth .10″ or more 8
Number of precipitation days with .50″ or more 3
Number of precipitation days with 1.00″or more 2

Weather types
Fog 14
Dense Fog 2
Thunder 8
Haze 10

Pressure
Highest barometric pressure 30.26″ (20/1237)
Lowest barometric pressure 29.76″ (8/0435)

Winds
Average Wind Speed 7.3 MPH
Daily prevailing wind direction 220°
Fastest Mile and direction 26 MPH from 230° (16)
Gale wind days 0
Damaging wind days 0

Relative Humidity
Average relative humidity at 0700 85% at 1300 58% at 1900 64% Minimum relative humidity 36% (21/1409)
Maximum relative humidity 100% on 5 separate days

Number of days with cloud-to-cloud and cloud-to-ground lightning 4

Character of day: Clear 6 Partly cloudy 17 Cloudy 8
Sky cover (sunrise to sunset): 6.3
Estimated total percent of possible sunshine: 42%
Minimum visibility: 1/16th mile in dense fog (31)

Remarks: Predominantly hot and humid weather with temperatures and
humidity above normal. Temperatures averaged more than 2° above normal. Precipitation averaged 1.31″ above normal for the month. Normal temperatures and precipitation values are based on records from the old COOP station at Woodstock Maryland, about 10 miles from my station.Year-to-date precipitation is now slightly above normal (+1.06″). The minimum relative humidity for the month (36%) was the highest monthly minimum relative humidity for the year so far. There were 12 days with minimum temperatures in the 60s and 19 days with mins in the 70s. There were only 2 days with maximum temps in the 70s, while there were 21 days with maximum temps in the 80s, and 8 days with maximum temps of 90° or more. On the 25th the sun solar temperature reached 116° at 1555 while the maximum ambient temperature was only 96°.


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July 2016 Gaithersburg 2 WNW Maryland weather summary and statistics for the NJWO blog

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

Average high temperature 88.8° (+ 2.0°)
Average low temperature 69.8° (+ 4.1°)
Mean temperature 79.3° (+ 3.1°)
Precipitation 5.88″ (+ 2.14″)
Greatest daily amount (date) 1.51″ (30)
Year to date precipitation 28.26″ (+ 1.98″)
High temperature for the month (date) 98° (25)
Low temperature for the month (date) 62° (11,21)
Highest barometric pressure (date) 30.25″ (20)
Lowest barometric pressure (date) 29.79″ (8)
Peak wind gust (date/direction): 24 (19/ENE)
Heating degree days for the month: 0
Cooling degree days for the month: 443
Greatest diurnal range (date): 28.3° (21)
Least diurnal range (date): 5.7° (4)

Fog days: 5
Thunder: 7
Sunny/clear days: 4 Partly Cloudy days: 17 Cloudy days: 10

Days with measurable precipitation (=>.01″) = 11
Days with maximum temperatures of 90 or more = 17
Days with minimum temperatures of 70 or more = 18

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

July 2016 featured plenty of heat and humidity, along with an abundance of precipitation with a late month rally of heavy
rainfall from numerous thunderstorms and downpours.
Numerous records were set of many types. Two record high
temperatures were recorded on the 14th (96°) and the hottest day of the month on the 25th (98°). 17 days with maximum
temperatures of 90° or greater was considerably above the
normal amount of 10 days, but not a record (22 days in July
1999). 18 days with minimum temperatures of 70° or greater
was well above normal I am sure, though I don’t keep track
of that statistic in the long term. A cool wet July 4th helped set a record low max for the date (71°). There were 6 days
with record high mins set. Rainfall was running below normal through the 27th, but then a late month rally between the 28th and 31st when 3.05″ of rain fell brought the month to 5.88″, fifth wettest all-time, and over 2 inches above normal. Daily precipitation records were set on my birthday, the 29th
(0.93″) and the wettest day of the month on the 30th (1.51″). On that day record rains fell nearby in the Ellicott City MD area with incredible devastating floods of epic proportions. NOAA declared it a 1 in a 1000 year rainfall event.

The average maximum temperature for the month was 88.8°
(+2.0°), the average minimum temperature was 69.8° (+ 4.1°). The resultant mean average temperature for the month was
79.3° (+ 3.1°).

The month’s total precipitation amount of 5.88″ was 2.14″
above the normal July amount of 3.74″. My current year to
date precipitation total of 28.26″ through July 31 is 1.98″
above the normal amount of 26.28″. Precipitation was a bit
scarce the first 27 days of the month, with 7 day (July 9-15) and 8 day (July 20-27) dry streak periods and a total of
only 2.83″ rain falling. But the previously mentioned end of month wet period of 3.05″ between July 28 and July 31 put
us above normal for the month. 11 days of measurable rain at my station was essentially normal (long term average of 10.7)

The month’s modest highest barometric pressure reading of 30.25″ on the 20th occurred at the start of our longest dry streak of the month and our hottest temperatures of the month during that streak. The equally modest lowest pressure reading of the month of 29.79″ on the 8th occurred during a generally lower pressure time of July, started around the wet 4th of July.

The distribution of 4 sunny, 17 partly cloudy and 10 cloudy days fit in with the muggy, wet conditions commonly found during much of the month. There was definitely a good deal of clouds around most of the month with the rather low amount of sunny days.

There were 443 cooling degree days (CDD) and 0 heating degree days. There were a below normal amount of 5 days with fog and a bit above normal amount (7) of thunderstorm days. The peak wind gust during the month was a modest 24 MPH out of the ENE on the 19th, during a mid-evening thunderstorm. It was a generally calm month as this day was the only day of the month with a PWG over 20 MPH. There were a large amount of days (17) during the month with a daily PWG of under 10 MPH. The dominant daily wind direction was 22 days with a SW/WSW component, followed by a much lower 8 days with an easterly component and 1 day with a northerly component.

My maximum temperature frequencies included 17 days at or above 90°, 11 days between 80° and 89°, and 3 days between 70° and 79°. On the minimum temperature frequency side of things, there were 13 days between 60° and 69° and 18 days with minimum temperatures of 70° or greater.

The diurnal range average was a bit below normal (19.1° vs the normal of
21.1°). The max daily range of 28.3° occurred on the 20th at the beginning of our longest hot spell of the month (90° – 62°) on our hottest day of the month (94°- 60°). There were an additional 14 days with daily ranges at or above 20°, The lowest daily temperature range of only 5.7° (71°-65°) occurred on July 4th when we had our 2nd highest daily rainfall amount during the month. There was only 1 additional day during July with daily temperature readings less than 10°.

July 2016 started out relatively cool and wet, but that general pattern changed around the 9th and we were mostly dry and hot through the 27th. Hopefully this pattern will break down during August and we will have a more moderate rest of the summer. The wet period at the end of July initially broke our consecutive days of 90° max temperatures and has followed us into early August so far. We shall see. Check back in a few weeks to see how August finishes out. Don’t forget we are now in Hurricane Season! We just had a lull through most of July but Hurricane
Earl has brought us a hurricane in early August, and the tropical Atlantic has started to get active once again. So pay close attention to the tropics and beware!


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Sixth Tri-State Weather Conference Ready To Go Oct. 1st

We finally  have our website for the Sixth Tri-State Weather Conference ready to go with a list of speakers and a preliminary schedule. Registration is now open. Please post the info
for your members. The website is www.wcsu.edu/weatherconference.

Louis Uccellini the head of the NWS, Bob Hart from FSU, Dr. Joseph D’Aleo from Weatherbell and Anthony Praino from IBM are just  a few of the presenters.

Thank you.

Take care,
Gary

Gary Lessor
Assistant to the Director of Meteorological Studies and Weather Center
Meteorology Club Advisor
Meteorology Bridge Program Coordinator
Tri-State Weather Conference Organizer
Western Connecticut State University
181 White Street
Danbury, CT 06810
203 837 8552

October 1, 2016 from 8:00 a.m. to 5:00 p.m. in the Science Building Room 125 on the Midtown Campus of Western Connecticut State University, 181 White Street, Danbury, Connecticut.

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REISTERSTOWN MARYLAND – JUNE 2016 – MONTHLY CLIMATOLOGICAL SUMMARY FOR THE NJWO BLOG

JUNE 2016 CLIMATOLOGICAL SUMMARY
REISTERSTOWN MARYLAND CITY OFFICE
by Observer in charge/NJWO member Ray Muller

Average maximum temperature 81.0°
Average minimum temperature 63.4°
Average mean temperature 72.2°
High temperature 90° (11/1632)
Low temperature 50° (9/0640)
Max daily range in temperature 27° 77°-50° (9)
Min daily range in temperature 3° 71°-68° (3)
Min max temperature 66° (8/1607)
Max min temperature 74° (12/0654)
Number of days with max temp of 90 or more 1

Monthly precipitation 3.95″
Year-to-date precipitation (through 6/30) 22.75″
Max rain rate in 30 minutes 0.31″ (24)
Max precipitation in 24 hours 0.72″ (24)
Number of precipitation days with .01″ or more 13
Number of precipitation days wth .10″ or more 9
Number of precipitation days with .50″ or more 3
Number of precipitation days with 1.00″or more 0

Weather types
Fog 13
Dense Fog 0
Thunder 5
Haze 8

Pressure
Highest barometric pressure 30.34″ (18/1032)
Lowest barometric pressure 29.50″ (7/1330)

Winds
Mean speed 7.9 MPH
Fastest mile 27 MPH from 320° (8/1336)
Peak wind gust 38 MPH from the NW (8/1337) Daily average peak wind gust 20.8 MPH from the NW
Gale wind days 1
Damaging wind days 0

Relative Humidity
Minimum relative humidity 14% (12/1512)
Maximum relative humidity 100% on 6 separate days

Number of days with cloud-to-cloud and cloud-to-ground lightning 3

1900 averages
Average temperature 75.2°
Average dew point 56.8°
Average relative humidity 56%
Prevailing wind direction 330°
Average wind speed 8.8 MPH
Average pressure 29.96″
Average sky cover 5.7
Average visibility 5 miles

Remarks: Temperatures for the month averaged near normal and precipitation slightly below normal (-0.11″). Year-to-date precipitation
was slightly below normal (-0.15″). Minimum monthly visibility was 1/2 mile in thunderstorms and heavy rain showers on the 24th. On the 11th the sun solar temperature reached 109° at 1600 hours while the maximum ambient temperature was only 90°.


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6th Tri-State Weather Conf-Sat-Oct 1 & Is it Time to Lengthen the Hurricane Season? – No NYC NWSFO Open house

FYI -The New York City National Weather Service will not be having an open house at Brookhaven Nat’l Lab (BNL) this summer. See below for this summer’s BNL program schedule.

The Sixth Tri-State Weather Conference will be held on Saturday, October 1, 2016 from 8:00 a.m. to 5:00 p.m. in the Science Building Room 125 on the Midtown Campus of Western Connecticut State University, 181 White Street, Danbury, Connecticut. Continental breakfast will be served from 8:00 to 8:30 a.m. in the Science Building Atrium. Please arrive early for check-in and breakfast.

The conference is presented by the Meteorology Program at Western Connecticut State University and co-sponsored by the WestConn Student Chapter of the AMS, the New York City/Long Island Chapter of the AMS, NOAA/National Weather Service/Upton, N.Y and NOAA/National Weather Service/Taunton, MA. The purpose of the conference is to enhance education, professional development and communication among private and public sector meteorologists, researchers, educators, students, emergency management officials, and weather enthusiasts.

Submissions, in the form of oral presentations and posters, are being solicited on high impact weather events that affect the Tri-State region of New York, New Jersey, and Connecticut. Potential topics would include, but are not limited to, nor‘easters and winter weather, severe thunderstorms, tropical weather and hurricanes, climate change, and mesoscale meteorology. We are especially interested in presentations about significant historical weather events from the region from the past twenty-five, fifty, seventy-five and one hundred years or more. The deadline for abstracts is July 15, 2016.

Registration details

The registration fee is $30 and will include continental breakfast, morning and afternoon snacks and a full buffet lunch, along with conference materials. Registrations and payments after the September 23 deadline will be accepted on a ‘space available’ basis.

For further information, contact Gary Lessor, Department of Physics, Astronomy, and Meteorology, Western Connecticut State University, 181 White Street, Danbury, CT 06810 (tel: 203-837-8552; email: lessorg or Mark Kramer, co-chair c/o WeatherMark LLC 914-777-1729, e-mail at nycliams

Register at http://www.wcsu.edu/weatherconference/

Time to Lengthen the Official Hurricane Season? The Front Page

Link to The Front Page
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JUNE 2016 – GAITHERSBURG 2 WNW MARYLAND – Report for the NJWO Blog

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

Average high temperature 83.4° (+ 0.5°)
Average low temperature 63.2° (+ 2.1°)
Mean temperature 73.3° (+ 1.3°)
Precipitation 3.96″ (- 0.44″)
Greatest daily amount (date) 1.24 (21)
Year to date precipitation 22.38″ (- 0.16″)
High temperature for the month (date) 94° (11)
Low temperature for the month (date) 50° (9)
Highest barometric pressure (date) 30.39″ (19)
Lowest barometric pressure (date) 29.54″ (7)
Peak wind gust (date/direction): 22 (8/SW)
Heating degree days for the month 2
Cooling degree days for the month: 252
Greatest diurnal range (date): 33.6° (11)
Least diurnal range (date ): 11.0° (3)

Fog days: 3
Thunder: 4
Sunny/clear days: 16
Partly Cloudy days: 8
Cloudy days: 6

Days with measurable precipitation (=>.01″) = 9
Days with maximum temperatures of 90° or more = 2
Days with maximum temperatures of less than 60° = 5

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

June 2016 had slightly above normal temperatures, particularly on the minimum side as has been the case the past few years, and slightly below normal precipitation. Extremes of daily precipitation and temperatures were limited to just a few days. The wettest day of the month, 1.24″ on the 21st set a daily record, and a more modest amount of 0.72″ on the 16th also set a daily record. The total precipitation amount of 3.96″ was my 19th wettest/driest June ever in 38 years of record going back to 1979. Nine days of measurable rainfall came in a bit below my long-term normal amount of 11.4. The 71° maximum temperature on the 8th tied a record for the date with 2003 for lowest max temperature. A pair of 69° minimum temperatures on the 3rd and 4th tied a record on the 3rd with 2010 for highest min and set a new daily record on the 4th. The extreme values for the month came close, but did not eclipse or tie the daily records for the dates. (94° high on the 11th which followed the 50° low just two days before on the 9th). 2 days with max temps of 90° or more and 5 days with min temps in the 50s are pretty typical for the month of June. At least no long heat waves!!!

The average maximum temperature for the month was 83.4°
(+0.5°), the average minimum temperature was 63.2° (+ 2.1°). The resultant mean average temperature for the month was
73.3° (+ 1.3°).

The month’s total precipitation amount of 3.96″ was 0.44″
below the normal June amount of 4.40″. My current year to
date precipitation total of 22.38″ through June 30 is 0.16″
below the normal amount of 22.54″. Precipitation was fairly
well distributed throughout the month, with the longest dry
spell of 6 days between the 9th and 14th the longest period. The 9 days of measurable precipitation for the month was half the amount we had in May, but only about 2 1/2 days below the long-term average of 11.4.

The month’s highest barometric pressure reading of 30.39″ on the 19th occurred in the middle of our 2nd mini-heat wave of the month. The lowest pressure reading of the month was 29.54″ on the 7th at the beginning of our coolest period of the month on the 8th and 9th.

The distribution of 16 sunny, 8 partly cloudy and 6 cloudy days fit in the drier, sunnier June 2016 pattern. 10 of the 16 sunny days during the month occurred during the middle part of the month, between the 8th and 20th.

There were 252 heating degree days (HDD) and 2 cooling degree days. There were a below normal amount of 3 days with fog and a just about normal amount (4) of thunderstorm days. The peak wind gust during the month was a modest 22 MPH out of the SW on the 8th, once again behind the strongest traditional cold frontal passage of the month, and our resultant coolest period of the month through the 9th. It was not a very windy month, with only 2 days registering peak wind gusts over 20 MPH.
The dominant daily wind direction was 16 days with a SW
component, and then 13 days with an E component.

My maximum temperature frequencies included 2 days of 90°,
25 days between 80° and 89°, and 3 days between 70° and 79°. On the minimum temperature frequency side of things, there
were 5 days with minimums between 50° and 59°, 24 days
between 60° and 69° and 1 day with a minimum greater than 70°.

The diurnal range average was only a little bit below normal (20.2° vs the normal of 21.8°). The max daily range of 33.6° occurred on the 11th on our hottest day of the month (94°- 60°). There were an additional 11 days with daily ranges at or above 20°, same as in May. The lowest daily temperature range of
only 11.0° (80°-69°) occurred on the 3rd on our second
day of the month (1.04″). There were only 4 additional days
during June with daily temperature ranges of less than 15°.

June 2016 was yet another reversal to the wet, cloudy patterns
of May, with warmer, drier skies on the whole compared with the previous month. Strong indications currently are a prevalent theme among many forecasters that we are going to have a hot
rest of the summer. We shall see. So far July has started out relatively cool, cloudy and wet, but forecasts for the coming week include those all too familiar summertime descriptive
terms of hot and humid. Check back in a few weeks to see how July finishes out. Don’t forget we are now in Hurricane Season! We haven’t had much tropical activity yet or in the past few years here in this area of Maryland but it could start anytime!


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June 2016 Meeting: Tomer Burg

Wednesday June 8, 2016 7PM

Meteorologist and NJWO Member

Tomer Burg!

Discussing his Research Project at

 The Severe Storms Lab in Norman Oklahoma!

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MAY 2016 – GAITHERSBURG 2 WNW MARYLAND – Report for the NJWO Blog

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

Average high temperature 70.8° (-3.5°)
Average low temperature 54.0° (+2.6°)
Mean temperature 62.4° (-0.5°)
Precipitation 5.66″ (+1.20″)
Greatest daily amount (date) 1.58″ (2)
Year to date precipitation 18.42″ (+0.28″)
Seasonal snowfall (2015-2016) 37.9″ (+9.1″)
High temperature for the month (date) 90° (26,27)
Low temperature for the month (date) 41° (16)
Highest barometric pressure (date) 30.31″ (10)
Lowest barometric pressure (date) 29.67″ (4,5)
Peak wind gust (date/direction): 23 (14/WSW)
Heating degree days for the month: 161
Cooling degree days for the month: 81
Greatest diurnal range (date): 33.0° (25)
Least diurnal range (date) 2.7° (6)

Fog days: 8
Thunder: 1
Sunny/clear days: 7 Partly Cloudy days: 7 Cloudy days: 17
Days with measurable precipitation (=>.01″) = 18
Days with maximum temperatures of 90° or more = 2
Days with maximum temperatures of less than 60° = 7

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

May 2016 was remarkable with regard to the extent of
cloudy, cool days the first half of the month, and the
streak of 14 straight days with rain on the first 11
days of the month that was an extension of the last 3
wet days of April. I don’t have records for this
particular type of streak but so far in my preliminary
research this is the longest streak of its kind in my
37+ years of records for my current location. The 18
total days with rain during May was quite a bit above
normal but was not a record for May. The record for
May is 20 days set back in 2003, with second place a
tie at 19 days in 1996 and 2009. The 17 cloudy day
total is probably not a record, but once again I don’t
keep close tabs on the records for that statistic.
This May was my 10th wettest May in my 38 year period
of record. Amazingly as cool and cloudy as it was,
the mini-heat wave the last third of the month
balanced out my temperature averages into below normal
but only with the average max temperature and the mean
temperature (only slightly). The only daily
precipitation record set during the month was on the
wettest day of the month on the 2nd with 1.58″. It was
also my only thunderstorm day of the month. There were
two 90 max days (not records), but seven days with temps
holding in the 50s (three of these days set new minimum
maximum daily records).

The average maximum temperature for the month was 70.8°
(-3.6°), the average minimum temperature was 54.0° (+ 2.6°). The resultant mean average temperature for the month was
64.2° (- 0.5°). The cool first part of the month was almost
balanced out by a warm finish, but not quite.

The month’s total precipitation amount of 5.66″ was 1.20″
above the normal May amount of 4.46″. My current year to
date precipitation total of 18.42″ through May 31 is 0.28″
above the normal amount of 18.14″. Precipitation was
concentrated somewhat during the first 23 days of the month, with over 90% of the total precipitation and 17 out of the
18 measurable days of rain falling. The 18 days of measurable precipitation for the month well above the the long-term
normal amount of 12.3 days. I think it is very interesting to note on one particularly rainy day on May 22, the relative
humidity only varied the entire day by one percent, from 98% to 97%. I believe that probably at least ties my long time
record, I don’t ever recall any day with no variation in
relative humidity values since I started to record this data daily back in November 2009, and probably before that too.

The month’s highest barometric pressure reading of 30.31″ on the 10th occurred near the end of our 14 day precipitation
streak. The lowest pressure reading of the month was 29.67″
on the 4th and 5th occurred in the middle of our big early
month rainfall and cool, cloudy streak.

The distribution of 7 sunny, 7 partly cloudy and 17 cloudy
days fit in the wet May 2016 pattern. The sunny and partly
cloudy days mostly occurred during the last part of the month.

There were 161 heating degree days (HDD) and 81 cooling degree days. There were an above normal amount of 8 days with fog and the lower than normal only 1 thunderstorm day. The peak wind gust during the month was a modest 23 MPH out of the WSW on the 14th, behind the strongest traditional cold frontal passage of the month. It was not a very windy month, with only 3 days
registering peak wind gusts over 20 MPH. The cool first period generally featured easterly component winds and the warmer drier last week or so featured more of a westerly component wind, particularly WSW.

My maximum temperature frequencies included 2 days of 90°, 6 days between 80° and 89°, 9 days between 70° and 79°, 7 days between 60° and 69° and 7 days between 50° and 59°. On the
minimum temperature frequency side of things, there were 6 days between 40° and 49°, 20 days with minimums between 50° and 59°, and 5 days with minimums of 60° or greater.

The diurnal range average was quite a bit below normal (16.8° vs the normal of 22.9°). The max daily range of 33.0° occurred on the 25th at the beginning of the mini-heat wave at the end of the month (88°- 55°). There were an additional 11 days with daily ranges at or above 20°. The lowest daily temperature range of 2.7° (54°-51°) occurred on the 6th on our second wettest day of the month. right in the middle of the 14 day consecutive wet day period from April 28-May 11. There were a total of 9 days during May with daily temperature ranges of less than 10°.

May 2016 was a reversal to the trend of warmer and drier than normal months so far this year. We did have the usual warmup at
the end of the month which helped to knock down the below normal departures quite a bit. Convective activity continued to run below normal in what normally is a very active month. The
predominant easterly flow helped to keep thunderstorm activity to a minimum. But June has started out more summery, not too hot yet but quite muggy and more active convectively so far. Check back in a few weeks to see how June finishes out. It can be quite a steamy, wet month in this area as we head into summer.


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Reisterstown City Maryland Weather Summary for May 2016

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

Temperature
Maximum for month 88° on May 28
Minimum for month 39° on May 16
Minimum maximum for month was 51° on May 6
Maximum minimum for month was 68° on May 28
Average temperature for the month 59.9°.

Precipitation
Monthly total amount 4.96″
Year to date amount 18.80″
Maximum amount in 12 hours 0.44″ on May 6
Maximum amount in 24 hours 1.11″ on May 6
Number of days of measurable amounts:
.01″ = 23
.10″ = 13
.50″ = 1
1.00″= 1

Winds
2-minute fastest mile was 20 MPH from 310° at 1347 on May 15
Peak wind gust was 32 MPH from the Northwest at 1347 on May 15
Number of days with:
Gale-force winds = 0
Damaging winds = 0

Barometric pressure
Maximum value 30.34″ on May 10
Minimum value 29.60″ on May 5

Relative Humidity
Minimum value 25% at 1800 on May 20
Maximum value 100% on 11 separate days during May

Types of weather
Fog = 16
Dense Fog = 1
Thunder = 2
Haze = 6

Lowest Visibility was 1/4 mile in drizzle/fog at 1900 on May 1

Comments: Temperatures at my station averaged below normal.
The monthly high temperature of 88° was the warmest temperature
of the year so far.
Precipitation was above normal after 2 months previous below normal.
The daily average peak wind gust averaged in the upper teens in May
compared with 20s in March and April.

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