Saturday, April 12, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, APRIL 12, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0508E
SUNSET: 1823E
MIXED WINTRY PRECIPITATION GIVES WAY TO DRIZZLE….
It is yet another dreary and cold Saturday, continuing that recent trend.
Precipitation began here yesterday evening as rain, before mixing with/
transitioning to ice pellets and snow at times overnight. The snow did
manage to accumulate 0.6″, but has since all melted away. The mixed
precipitation ended mid-morning, with drizzle and fog continuing thereafter.
Storm total liquid equivalent precipitation thus far is 0.50″.
Temperatures have been steady, with a low of 33F around 1am and a high
so far of 36F, which is well below normal for mid April. Climatologically,
we should be reaching the mid 50s! Making matters worse is the wind, as the
wind chill remains in the low to mid 20s.
Winds are steady, picking up nicely this morning with flow out of the
east-northeast. The average speed for the day so far is 16mph, with a
peak gust to 40mph around 7:15am.
Visibility remains poor as we are stuck in the fog. 2 miles is the maximum
visibility observed so far today.
The maximum temperature for today is 36F degrees, which is 19 degrees
below the normal high of 55F. The minimum temperature since midnight
is 33F degrees, which is 4 degrees below the normal low of 37F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft,
light rain and ice pellets, fog
Temperature: 35F; Dew Point: 35F; Relative Humidity: 100%
Wind: ENE @ 16G24 kts, peak wind ENE 32mph @ 6:09am
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: rising, then falling
Visibility: 2 miles, fog
6-hr Max temp: 35F
6-hr Min temp: 33F
24-hr Precip: 0.46 inches
24-hr Snowfall: 0.6 inches
Snow Depth: Trace
BHO SA 1155 X W2 2R-IP-F 181/35/35/0716G24/006/ PK WND 0728/09 TOTAL NEW SNW
PST 24 HRS 0.6 INS/ 8//// 4/000 50005 6029/ 70046 10035 20033
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle, fog
Temperature: 35F; Dew Point: 35F; Relative Humidity: 100%
Wind: ENE @ 18G26 kts, peak wind ENE 35mph @ 9:04am
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: steady, then falling
Visibility: 2 miles, fog
3-hr Precip: 0.03 inches
3-hr Snowfall: Trace
BHO SA 1455 X W2 2L-F 178/35/35/0718G26/006/ PK WND 0730/04 TOTAL NEW SNW
PST 3 HRS TRACE/ 8//// 58003 6003/
1 P.M.
Weather: Sky obscured, vertical visibility 200ft, very light drizzle, fog
Temperature: 35F Dew Point: 35F; Relative Humidity: 100%
Wind: NE @ 15G24 kts, peak wind NE 35mph @ 12:06pm
Sea-level pressure: 1016.6 mb; 30.02 in. Hg: falling unsteadily
Visibility: 1/4 mile, fog
6-hr Max temp: 36F
6-hr Min temp: 35F
6-hr Precip: 0.04 inches
6-hr Snowfall: Trace
Snow Depth: 0 inches
BHO SA 1755 X W2 1/4L-F 166/35/35/0515G24/002/ PCPN VRY LGT PK WND 0530/06
TOTAL NEW SNW PST 6 HRS TRACE/ 8//// 57012 6004/ 10036 20035
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SUMMARY FOR FRIDAY, APRIL 11, 2025
TEMPERATURE (DEGREES F)
MAX…….45 NORMAL…..54
MIN…….31 NORMAL…..36
MEAN……38 NORMAL…..45
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………-7
TOTAL DEPARTURE FOR THE MONTH……………………..-19 [-1.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….27 DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH……………260 DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE SEASON………….5189 DEPARTURE……-400
TOTAL HEATING UNITS LAST SEASON TO DATE……..4874 DEPARTURE……+315
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)………..25 ENE @ 10:21 P.M.
VECTOR #1 (1-Sec)……….27 ENE @ 10:21 P.M.
VECTOR #2 (1-Sec)……….29 ENE @ 10:24 P.M.
DAVIS #1……………….26 ENE @ 10:21 P.M.
DAVIS #2 ………………28 E @ 10:24 P.M.
RMY #1 (Instantaneous)…..26 ENE @ 10:21 P.M.
RMY #2 (Instantaneous)…..29 ENE @ 10:24 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 ENE @ 10:24 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 11:11 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 11:11 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 ENE @ 10:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 E @ 10:22 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 ENE @ 10:22 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 NE @ 11:11 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.6 ENE [207 total miles]
VECTOR #1…………………M
VECTOR #2……………….9.2
DAVIS #1………………..9.0 E
DAVIS #2………………..8.8 E
RMY #1………………….8.7 E
RMY #2………………….9.2 ENE
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.46 DEPARTURE…..+0.28
TOTAL PRECIPITATION FOR THE MONTH…………..2.30 DEPARTURE…..+0.41
TOTAL PRECIPITATION FOR THE YEAR (2025)…….13.01 DEPARTURE…..-2.90
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.6 DEPARTURE……+0.5
TOTAL SNOWFALL FOR THE MONTH………………..1.7 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……35.8 DEPARTURE…..-32.9
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PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
4/1 55/32/44/+3/0.17/0.0/512/67 38 NW VEC1 38 NW RMY 40
4/2 42/27/35/-6/0.11/T/584/76 29 NNW VEC1 28 NNW RMY 29
4/3 62/32/47/+5/0.31/0.0/000/00 38 SW VEC1 38 SW RMY 39
4/4 69/47/58/+16/0.00/0.0/456/59 31 NW VEC1 31 NW RMY 30
4/5 47/36/42/-1/0.49/0.0/000/00 25 ESE VEC1 29 SE RMY 25
4/6 51/37/44/+1/0.20/0.0/016/02 22 NNW VEC1 21 NNW RMY 21
4/7 45/34/40/-4/0.18/T/000/00 24 E VEC1 23 NNE RMY 23
4/8 40/26/33/-11/0.10/0.1/196/25 51 W VEC1 48 W RMY 51
4/9 46/24/35/-9/0.00/0.0/755/96 36 WNW VEC1 33 NW RMY 36
4/10 49/29/39/-6/0.01/0.0/…/.. 23 SSW VEC1 23 SSW RMY 25
4/11 45/31/38/-7/0.39/1.2/…/.. 25 ENE VEC1 27 ENE RMY 26
4/12 The low since midnight is 33F, the daily normal low is 37F.
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APRIL DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 9.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978
RECORDS FOR APRIL 13
HIGH 88 IN 2023
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 79 MPH S IN 2020
TODAY’S REPORT PREPARED BY: Joshua Polen
