MAY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND FOR THE NJWO BLOG

MAY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND
By Kevin Shaw, Observer in Charge

May 2018 featured significantly above normal rainfall and temperatures in the region, based on statistics compiled
at the three major airports in the DC area and in general corroboration with my own statistics. There were generally
warm temperatures all month except for 5 days in the 60s during some of our 16 rainy days during the month.
Most of the warm days were in the 80s, save for 2 days near the beginning of the month that just tipped over the
90° mark. Extremes in temperature were quite muted this month. The highest temperature of the month was 90.5°
on May 3, and the coolest was 46.4° just two days earlier on the 1st. There were no really notable heavy
precipitation days, just a lot of moderate amounts, topped by the 4 days of just over an inch during the month
(The 1.13” total on the 15th was the greatest daily amount for the month). A particularly wet period (May 13-19)
occurred with 7 straight days of measurable precipitation totaling 4.77” and was about 67% of the total monthly amount
(6.68”) for May 2018. There were 16 days with measurable precipitation, assuredly well above the normal amount.

As we approach the summer months, significant pressure differences become less important because, among other things,
they go away, unless we get some significant tropical activity with the usual low pressure associated with tropical storms
and/or hurricanes. May started to show this pattern as the extreme highest pressure for the month (30.25” on the 8th)
and the extreme lowest (29.80” on the 10th) weren’t nearly as large apart as in the colder months. But please note that
the extreme values still exhibit the seemingly usual pattern of not being very far apart in days. The month had 13 cloudy
days, 10 partly cloudy days, and 8 clear/sunny days.

There were only 16 heating degree days and 174 cooling degree days during the month. There were 11 foggy days, 7
days with thunder and 6 windy days (mostly from thunderstorms). The windy day category is subjective with no personal
real data values to back it, just based on my descriptive email daily weather posts that are also posted
on weathertogether.net.

Daily max/min temperatures varied less than April throughout May. My maximum temperature frequencies included 2
days of 90° or greater, 16 days between 80° and 89°, 8 days between 70° and 79°, and 5 days between 60° and
69°. On the minimum temperature frequency side of things, there was 1 day between 40° and 49°, 11 days between
50° and 59°, 17 days between 60° and 69°, and 2 days at or above 70°. The coldest daily max temperature was
66.7° on the 18th and the warmest daily min temp was 71.9° on the 26th.

The diurnal range daily monthly average was 18.6°. Our greatest daily range of temperature was 35.8° on the 2nd°,
formed from a high of 87.8° and low of 52.0° as I was in short transition between the coldest and warmest
temperatures of the month on the 1st and 3rd. We had one more day with a range over 30° (33.2° on the 1st)
and an additional 10 days with daily ranges above 20°. Our lowest range of temperature was 3.6° (67.7°-64.1°)
on the 17th. It was one of our cloudy, rainy days of the month. There were 4 other days with diurnal temperature
ranges less than 10.0°, mostly on cloudy, rainy days.

With yet another month to study the most recent instrument changes made in mid-August, data appears to be stable
and an overall data quality improvement success. I am still constantly checking on my data quality frequently along with
some of my Maryland weather cohorts. I am about to add a lightning detection component to my system. I had problems
with pollen clogging my tipping bucket gauge during May, which inhibited my capacity for adding precipitation timing and
max rain rates to my daily records. I also have continued as close to daily (as time allows) GLOBE Cloud observations,
complete with submission of sky pictures at the time of the observation, usually timed with the passage of satellites and
also solar noon about 70 minutes past actual EDT noon. Please ask me any questions you want at any time about my station
setup and/or my data through any means available to you.

MAY 2018 – ROCKVILLE 2.8 WNW MARYLAND – SUMMARY STATISTICS

Average high temperature 79.4°
Average low temperature 60.8°
Mean temperature 70.1°

Precipitation 6.68″
Greatest daily amount (date) 1.13″ (15)
Greatest storm total (dates) 4.77” (13-19)
2018 year-to-date precipitation total 18.50″

High temperature for the month (date) 90.5° (3)
Low temperature for the month (date) 46.4° (1)

Highest barometric pressure (date) 30.25” (8)
Lowest barometric pressure (date) 29.80” (10)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 16
Cooling degree days for the month: 174

Greatest diurnal range (date): 35.8° (2)
Least diurnal range (date): 3.6° (17)

Number of days:

Fog 11
Windy 6
Thunder 7
Cloudy 13
Partly Cloudy 10
Sunny/Clear 8
Max temp ≥ 90° 2
Min temp ≤ 32° 0
Precip ≥ 0.01” 16

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NJWO June 2018 Meeting with Joe Cioffi!

The NJWO had their June 2018 meeting last night and enjoyed a presentation from Meteorologist Joe Cioffi via Skype and YouTube! Despite some technical issues here and there the meeting was enjoyed by all who attended. Joe gave his usual weather overview and well as a look ahead.

Joe not only posts regularly to YouTube but to his Facebook page as well. Check him out!

Janet clears off the tree pollen for our outdoor meeting!

NJWO members enjoying a remote session with Joe Cioffi outdoors!

NJWO members enjoying a remote session with Joe Cioffi outdoors!

NJWO members enjoying a remote session with Joe Cioffi outdoors!

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APRIL 2018 MONTHLY SUMMARY AND CLIMATE STATISTICS FOR ROCKVILLE 2.8 WNW MARYLAND FOR THE NJWO BLOG

APRIL 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND

By Kevin Shaw, Observer in Charge

April 2018 featured a bit above normal rainfall and below normal temperatures at the three major airports in the DC area. There were generally cool temperatures all month except for a brief 2 day mini-heat wave on the 13th and 14th when I had maximum temperatures in the 80s and lows in the 60s. The 84° high was the highest temperature of the month. Just a few days before I had my coldest max temperature readings in the 40s on the 8th and 9th, with a 42° max on the 9th the coldest max of the month. The coldest min temperature of the month (31°) occurred on the 8th. It was the only freezing minimum of the month, though many other days were close in the 33°-34° range. Another cold day with high winds was on the 17th, following our biggest storm of the month and the lowest barometric pressure (29.47”) on the 16th. The 2.22” total on the 16th was about 62% of the monthly amount (3.57”) and so far the wettest day of the year at my station. There were 10 days with measurable precipitation, probably about the normal amount. The modest highest barometric pressure reading of the month (30.51″) on the 21st was in a brief 4 day dry period at that time. The month was mostly partly cloudy (12 days) to cloudy (13 days) with only 5 clear days (same as March).

There were 398 heating degree days (HDD) and 17 cooling degree days (CDD) during the month. There were 7 foggy days, unfortunately no days with snow (including trace amounts), 3 windy days and 2 days with thunder. The windy day category is subjective with no personal real data values to back it, just based on my email daily weather posts that are also posted on weathertogether.net. A 52 MPH gust was recorded on the 19th at a nearby Gaithersburg station, according to the April PRESTO summary.

Daily max/min temperatures varied more widely than March throughout April. My maximum temperature frequencies included 2 days over 80°, 3 days between 70° and 79°, 11 days between 60° and 69°, 11 days between 50° and 59°, and 3 days between 40° and 49°, On the minimum temperature frequency side of things, there were 12 days between 30° and 39°, 12 days between 40° and 49°, 3 days between 50° and 59°, and 2 days at or above 60°. The coldest daily max temperature was 42.4° on the 9th and the warmest daily min temp was 64.6° on the 14th.

The diurnal range daily monthly average was 18.5°. Our greatest daily range of temperature was 31.1° on the 12th°, formed from a high of 75.3° and low of 44.2° as I was ramping into our brief 2 day mini-heat wave over the following 2 days. We had one more day with a range over 30° (30.6° on the 30th) and an additional 10 days with daily ranges above 20°. Our lowest range of temperature was 6.3° (44.2°-37.9°) on the 17th. It was on the cloudy, blustery, chilly day after our big rainstorm on the 16th. There were 5 other days with diurnal temperature ranges less than 10.0°. The distribution of both the low and high diurnal range days were spread fairly evenly throughout the month ..

With yet another month to study the most recent instrument changes made in mid-August, data appears to be stable and an overall data quality improvement success. I am still constantly checking on my data quality frequently along with some of my Maryland weather cohorts. I did bring in my snowboard by the end of the month. I intended on bringing it in earlier in the month, but actual snow threats during the first part of the month delayed the snowboard removal. My rain gauge has been restored to fully operational mode, with both the inner and outer cylinders and the funnel in place. I also have continued as close to daily (as time allows) GLOBE Cloud observations, complete with submission of sky pictures at the time of the observation, usually timed with the passage of satellites and also solar noon right now with the time change about 70 minutes past actual EDT noon. Please ask me any questions you want at any time about my station setup and/or my data through any means available to you.

APRIL 2018 – ROCKVILLE 2.8 WNW MARYLAND – SUMMARY STATISTICS

Average high temperature 61.5°

Average low temperature 43.0°

Mean temperature 52.3°

Precipitation 3.57″

Greatest daily amount (date) 2.22″ (16)

Greatest storm total (dates) 2.25” (15-16)

2018 year-to-date precipitation total 11.82″

Snow 0.0″

Seasonal snowfall total as of 4/30/2018 11.7″

High temperature for the month (date) 83.9° (13)

Low temperature for the month (date) 31.1° (8)

Highest barometric pressure (date) 30.51” (21)

Lowest barometric pressure (date) 29.47” (16)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 398

Cooling degree days for the month: 17

Greatest diurnal range (date): 31.1° (12)

Least diurnal range (date) 6.3° (17)

Number of days:

Fog 7

Windy 3

Thunder 2

Cloudy 13

Partly Cloudy 12

Sunny/Clear 5

Max temp ≥ 80° 2

Min temp ≤ 32° 1

Precip ≥ 0.01” 10

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2018 Tropical Storm Names

2018 tropical storm names for Atlantic

With the warmer weather comes the potential of tropical systems. The official Hurricane season starts June 1. Above are the list of names for the Atlantic basin for 2018

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March 2018 Monthly summary and statistics for the NJWO Blog – Kevin Shaw, Rockville 2.8 WNW Maryland Observer

MARCH 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND

By Kevin Shaw, Observer in Charge

March 2018 turned the tables on our really warm February, so much so that I actually averaged colder in March by about 3° than February. While we were drier in March, because of the colder temps we got more snow in March than in February. There were only 12 days in February with minimum temperatures at or below freezing, in March there were 22, including a streak of 19 straight (from March 8 through March 26 – using rounded values to the nearest degree) While we had a grand snowfall total of 4.5”, 3.4” of it fell on the first day of spring on March 21, along with our coldest maximum temperature for the month of 33.1°. Precipitation was significantly below normal at the three major Baltimore/Washington airports. Our biggest storm was associated with the biggest snowfall, as 1.01” fell on the 2 day period (March 20-21). There were only 8 days with measurable precipitation, assuredly somewhat below normal I am sure, with an additional 3 days with trace amounts. The highest barometric pressure reading of the month (30.72″) on the 26th was in the middle of our month’s longest dry streak. The lowest barometric pressure reading of the month (29.45″) occurred on the 1st day of the month, during a 2 day stormy period kind of leftover from late February. The month was mostly partly cloudy (16 days) to go along with the subnormal precipitation, with only 5 clear days logged along with 10 cloudy days. The month was generally cool to cold, save for the brief warm spell at the end of the month, which followed our highest barometric pressure days.

There were 773 heating degree days (HDD) and 0 cooling degree days (CDD) during the month. There were 5 foggy days, 7 days with snow (including trace amounts), and 10 windy days. That is a subjective category with no real data values to back it, just based on my email daily weather posts that are also posted on weathertogether.net. There were 2 days with sleet and 1 day with glaze (both occurred on the 21st mixed in with our biggest monthly snowfall during the month with sleet also recorded on the 20th, the day before) .

Daily max/min temperatures varied a bit less widely throughout the month. My maximum temperature frequencies included 2 days over 70°, 0 days between 60° and 69°, 5 days between 50° and 59°, 22 days between 40° and 49°, and 2 days between 30° and 39°.. On the minimum temperature frequency side of things, 7 days between 20° and 29°, 20 days between 30° and 39°, and 4 days between 40° and 49°. The coldest daily max temperature was 33.1° on the snowy 21st (coldest min however, was 26.8° on the 11th) and the warmest daily min temp was 47.1° on that warmest day on the 29th (74.1°).

The diurnal range daily monthly average was 15.3°. Our greatest daily range of temperature was 28.6°, formed from a high of 71.8° and low of 43.2° on the 30th during the brief warm spell at the end of the month.. We only had an additional 4 days with daily ranges above 20°. Our lowest range of temperature was 3.3° on our snowiest (3.4”) day of the month (21st) when our readings (33.1° and 29.8°) teetered around the freezing mark. There were only 2 other days with diurnal temperature ranges less than 10.0°, a decrease of 6 over last month. The distribution of the low diurnal range days was spread randomly throughout the month whereas the highest diurnal range days occurred around the middle and end of the month.

With yet another month to study the most recent instrument changes made in mid-August, data appears to be stable and an overall data quality improvement success. I am still constantly checking on my data quality frequently along with some of my Maryland weather cohorts. I have been swapping out gauges when frozen precipitation occurs to allow for casual, comfortable melting inside my apartment. Despite the late blooming spring, I think the snow measuring season is finally behind us and I need to bring my snowboard in. My rain gauge has been restored to fully operational mode, with both the inner and outer cylinders and the funnel in place. I also have continued as close to daily (as time allows) GLOBE Cloud observations, complete with submission of sky pictures at the time of the observation, usually timed with the passage of satellites and also solar noon right now with the time change about 70 minutes past actual EDT noon. Please ask me any questions you want at any time about my station setup and/or my data through any means available to you.

MARCH 2018 – ROCKVILLE 2.8 WNW MARYLAND – SUMMARY STATISTICS

Average high temperature 47.7°

Average low temperature 32.4°

Mean temperature 40.1°

Precipitation 1.62″

Greatest daily amount (date) 0.69″ (20)

Snow 4.5″

Greatest daily amount (date) 3.4” (21)

2018 year-to-date precipitation total 8.25″

Seasonal snowfall total as of 2/28/2018 11.7″

High temperature for the month (date) 74.3° (29)

Low temperature for the month (date) 26.8° (11)

Highest barometric pressure (date) 30.72” (26)

Lowest barometric pressure (date) 29.45” (1)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 773

Cooling degree days for the month: 0

Greatest diurnal range (date): 28.6° (30)

Least diurnal range (date) 3.3° (21)

Number of days:

Fog 5

Windy 10

Snow 7

Cloudy 10

Partly Cloudy 16

Sunny/Clear 5

Max temp ≥ 70° 2

Min temp ≤ 32° 22

Max temp ≤ 32° 0

Precip ≥ 0.01” 8

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FEBRUARY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND FOR THE NJWO BLOG

FEBRUARY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND
By Kevin Shaw, Observer in Charge

February 2018 was one of the warmest Februarys ever among the 3 local major
airports with long records and official normals. The warmest period was on the
20th and 21st for maxima and on the 21st for minima and broke long standing
records at these airports. My 76° and 78° on those two consecutive days and
my 61° min on the 21st fit right in with the corresponding data from the major
airports at BWi, DCA and IAD. The first 10 days of the month was generally
the coldest period of the month, but still did not hold a 32 or lower max temp
all month. Rainfall was significantly above normal at these three airports, and
snowfall was well below normal, with only one day of snow on the 17th, curiously
also the max day for snow in January, though it was even a lesser amount (0.7”).
There were 16 days with measurable precipitation, assuredly what should be
significantly above average, topped off by the 1.13″ that occurred on the 4th.
The highest barometric pressure reading of the month (30.83″) on the 13th was
actually the highest I have had at my new station, surpassing the previous highest
pressure reading of 30.80” set back on January 9, 2017. The lowest barometric
pressure reading of the month (29.64″) occurred just three days later in the very
early morning hours of the 16th , just prior to our only snowfall of the month the
next day on the 17th.. The month was quite cloudy to go along with the bountiful
and frequent precipitation, with only 3 clear days logged along with 11 partly cloudy
and 14 cloudy days. The relatively cold period the first third of the month was
overwhelmed by the later in the month general warmth.at the three first-order
stations at the 3 major DC area airport locations to make it the warm month that
it was, near records at these official first-order locations. .

There were 618 heating degree days (HDD) and 5 cooling degree days (CDD) during
the month. There were many foggy days, 13 to be exact, only 1 day with snow, and
5 windy days. That is a subjective category with no real data values to back it, just
based on my email daily weather posts that are also posted on weathertogether.net.
There was 1 day with sleet and 3 days with glaze (both occurred on the 17th mixed
in with our only snowfall during the month with light amounts of glaze on the 4th and
7th ).

Daily max/min temperatures varied widely throughout the month. My maximum
temperature frequencies included 3 days over 70°, 5 days between 60° and 69°,
6 days between 50° and 59°, 7 days between 40° and 49°, and 7 days between
30° and 39°.. On the minimum temperature frequency side of things, 2 days
between 10° and 19°, 4 days between 20° and 29°, 14 days between 30° and
39°, 7 days between 40° and 49°, and 1 day above 60°. The coldest daily max
temperature was 32.8° on the 8th and warmest daily min temp was 61.2° on that
warmest day on the 21st.

The diurnal range daily monthly average was 15.5°. Our greatest daily range of
temperature was 30.6°, formed from a high of 67.1° and low of 36.5° during the
first of 2 mini-2 day “heat waves” during the month. This was the only day with a
range over 30°, We had an additional 8 days with daily ranges above 20°. Our
lowest range of temperature was 3.5° on our wettest (1.13”) day of the month
(13th) when our readings (34.6° and 31.1°) teetered precariously around the
freezing mark, mostly just above, to give us mostly all rain and just a bit of glaze.
There were a total of 8 days with diurnal temperature ranges less than 10.0°, an
increase of 2 over last month. The distribution of these low and high diurnal range
days was spread out fairly uniformly during the month.

With yet another month to study the most recent instrument changes made in mid-
August, data appears to be stable and an overall data quality improvement success.
I am still constantly checking on my data quality frequently along with some of my
Maryland weather cohorts. I have been swapping out gauges when frozen precipitation
occurs to allow for casual, comfortable melting inside my apartment. Unfortunately the
“snow stake” was pulled out early in February when high winds knocked it over partially
at a significant angle and has not been placed back outside through the current time.
I did get a new hand-held anemometer that is especially sensitive to light winds, a good
thing as that is a persistent trait at my relatively calm location. I also have continued
just about daily GLOBE Cloud observations, complete with submission of sky pictures at
the time of the observation, usually timed with the passage of satellites and also solar
noon right now with the time change about 70 minutes past actual EDT noon. Please ask
me any questions you want at any time about my station setup and/or my data through
any means available to you.

FEBRUARY 2018 – ROCKVILLE 2.8 WNW MARYLAND – SUMMARY STATISTICS

Average high temperature 50.8°
Average low temperature 35.4°
Mean temperature 43.1°

Precipitation 4.80″
Greatest daily amount (date) 1.13″ (4)
Snow 2.0″
Greatest daily amount (date) 2.0” (17)
2018 year-to-date precipitation total 6.63″
Seasonal snowfall total as of 2/28/2018 7.2″

High temperature for the month (date) 78.3° (21)
Low temperature for the month (date) 13.7° (3)

Highest barometric pressure (date) 30.83” (13)
Lowest barometric pressure (date) 29.64” (16)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 618
Cooling degree days for the month: 5

Greatest diurnal range (date): 30.6° (16)
Least diurnal range (date) 3.5° (4)

Number of days:

Fog 13
Windy 6
Snow 1
Cloudy 14
Partly Cloudy 11
Sunny/Clear 3
Max temp = > 70° 3
Min temp < = 32° 12
Max temp < = 32° 0
Precip = > 0.01” 16

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January 2018 Weather summary statistics and summary description for NJWO Blog

JANUARY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND
By Kevin Shaw, Observer in Charge

January 2018 started my second year at my apartment observing the weather and
living at this location in West Rockville MD. The month started off with a bang, as
I had my coldest week ever (1st-7th) and coldest days, with the first days of
maximums in the teens on the 5th and 6th and my coldest min ever of 2.9° on the
morning of the 7th. Combined with the last 5 days of 2017, the 12 day period from
December 27th-January 7th is easily the longest sub-freezing max temperature period
in my short period of record. But even with much longer duration official stations in the
area, this snap was quite epic and near the all-time record long period of cold. The rest
of the month was generally much warmer, with only a few seasonably cold days and many
days with highs in the 50s and 60s (66.5° max on the 12th was the highest). Rainfall
and snowfall was below normal, with only a few days of snow, all less than an inch.
There were 9 days with measurable precipitation, probably just a bit below normal,
topped off by the 0.90″ that also occurred on the 12th. The highest barometric
pressure reading of the month (30.74″) on the 26th was actually the highest since
early March, but on a seasonable day with temperatures topping off in the mid 40s.
The lowest barometric pressure reading of the month (29.37″) occurred just after
midnight on the 13th and was associated with by far our wettest two days of the
month (1.35″). The month was pretty cloudy despite the meager precipitation, with
6 clear days logged along with 15 partly cloudy and 10 cloudy days. The general
reversal of that very cold pattern at the start of the month balanced out temps
to be just a bit below normal values at the three first-order stations at the 3
major DC area airport locations.

There were 991 heating degree days (HDD) and 0 cooling degree days (CDD) during
the month. There was only 4 days with fog, 4 days with snow, and a new category,
9 windy days. That is a subjective category with no real data values to back it, just
based on my email daily weather posts that is also posted on weathertogether.net.
There was 1 day with sleet and 1 day with glaze (on the 8th as we were getting out
of the deep freeze).

Daily max/min temperatures varied widely throughout the month. My maximum
temperature frequencies included 5 days between 60° and 69°, 5 days between
50° and 59°, 6 days between 40° and 49°, 8 days between 30° and 39°, 5
days between 20° and 29°, and 2 days colder than 20°. On the minimum
temperature frequency side of things, there were 3 days lower than 10°, 11 days
between 10° and 19°, 7 days between 20° and 29°, 6 days between 30° and 39°,
3 days between 40° and 49°, and 1 day 50° or above. The coldest daily max
temperature was 16.8° on the 5th and warmest daily min temp was 56.2° on that
“busy” day on the 12th.

The diurnal range daily monthly average was 17°. Our greatest daily range of
temperature was 41.5°, formed from a high of 60° and low of 19° as a strong
cold frontal passage dropped temperatures quickly after a warm start. This was
the only day with a range over 40°, only one other day had a range over 30°
but we had an additional 8 days with daily ranges at or above 20°. Our lowest
range of temperature was 6.7° on our coldest max day of the month on the 5th,
formed from a high temperature of 17° and a low temperature of 10°. There
were a total of 6 days with diurnal temperature ranges less than 10.0°, a
decrease of 1 over last month. The distribution of these days was spread out
over the month, on both warm and cold days.

With yet another month to study the most recent instrument changes made in mid-
August, data appears to be stable and an overall data quality improvement success.
I am still constantly checking on my data quality frequently along with some of my
Maryland weather cohorts. With the paucity of snow, my recently installed
snowboards have not gotten much action this winter so far. With the recent warm
spell I have returned the inner tube and funnel to my cocorahs rain gauge setup,
as below freezing temps do not appear to be returning the rest of February into
early March. I have been swapping out gauges when frozen precipitation occurs to
allow for casual, comfortable melting inside my apartment. Unfortunately the “snow
stake” was pulled out early in February when high winds knocked it over partially at
a significant angle and has not been placed back outside through the current time.
I did get a new hand-held anemometer that is especially sensitive to light winds,
a good thing as that is a persistent trait at my relatively calm location. I also have
resumed taking daily GLOBE observations, complete with submission of sky pictures
at the time of the observation, usually timed with the passage of satellites if at
all possible. If not, I try to take the observation around the time of solar noon,
about 20 minutes past actual noon. Please ask me any questions you want at any
time about my station setup and/or my data through any means available to you.

JANUARY 2018 – ROCKVILLE 2.8 WNW MARYLAND – SUMMARY STATISTICS

Average high temperature 41.5°
Average low temperature 24.5°
Mean temperature 33.0°

Precipitation 1.83″
Greatest daily amount (date) 0.90″ (12)
Snow 1.4″
Greatest daily amount (date) 0.7” (17)
2018 year-to-date precipitation total 1.83″
Seasonal snowfall total as of 1/31/2018 5.2″

High temperature for the month (date) 66.5° (12)
Low temperature for the month (date) 2.9° (7)

Highest barometric pressure (date) 30.74” (26)
Lowest barometric pressure (date) 29.37” (13)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 991
Cooling degree days for the month: 0

Greatest diurnal range (date): 41.5° (13)
Least diurnal range (date) 6.7° (5)

Number of days:

Fog 3
Windy 9
Snow 4
Cloudy 6
Partly Cloudy 15
Sunny/Clear 10
Max temp => 70° 0
Min temp =< 32° 23
Max temp =< 32° 10

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National Weatherperson’s Day (a day late)

http://kevinshaw.weathertogether.net/2018/02/06/national-weatherpersons-day-february-5-a-day-late-as-i-post-this/

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NWS Now Accepting Applications for Summer Student Interns

The Student Volunteer Intern Program
at the NWS Mount Holly Forecast Office

Are you a college student from the Philadelphia/Delaware Valley area, in your Junior year of a major in Meteorology or a related field?

Are you interested in learning first-hand about operational forecasting in the National Weather Service?

If so, then the student volunteer intern program at

NWS Mount Holly may be right for you.

More details at: http://www.weather.gov/phi/recruit

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Stewartsville December 2017 Summary

Stewartsville Monthly Weather Observation Summary

Dec-17

DAY MAX MIN MEAN PRECIP SNOW SOG COMMENTS
1 53.0 30.0 41.5 0.01
2 49.0 25.0 37.0 0
3 48.0 29.0 38.5 0
4 51.0 28.0 39.5 0.00
5 58.0 46.0 52.0 0.22
6 57.0 34.0 45.5 0.01
7 44.0 27.0 35.5 0
8 36.0 27.0 31.5 0
9 34.0 28.0 31.0 0.18 4.1 Coastal
10 39.0 21.0 30.0 0 4
11 40.0 27.0 33.5 0 2
12 43.0 23.0 33.0 0 T
13 30.0 18.0 24.0 T T
14 31.0 16.0 23.5 0.08 2.7 2.7 Clipper2
15 26.0 10.0 18.0 0.03 0.7 1.5 Clipper 3
16 38.0 15.0 26.5 0 2
17 38.0 30.0 34.0 0
18 45.0 33.0 39.0 0
19 56.0 41.0 48.5 0
20 51.0 26.0 38.5 0
21 40.0 25.0 32.5 0
22 46.0 30.0 38.0 0
23 53.0 37.0 45.0 0.75
24 41.0 33.0 37.0 0.06 0.2
25 35.0 25.0 30.0 0.14 0.2 0.4 White Christmas?
26 28.0 18.0 23.0 0
27 25.0 12.0 18.5 0
28 20.0 9.0 14.5 0
29 22.0 10.0 16.0 0
30 24.0 13.0 18.5 1 T
31 18.0 6.0 12.0 0 1
1.48 8.90
8.90 Season Total
Extreme High 58.0 Date: 12/27/2016
Extreme Low 6.0 Date: 12/20/2016
Mean Max: 39.3
Mean Low: 24.3
Mean: 31.8

dabour@att.net

SOG = Snow On Ground measured at 7 AM EST

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