Thursday, April 23, 2026

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

THURSDAY, APRIL 23, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0451E
SUNSET: 1835E

MAINLY SUNNY AND MILDER TODAY WITH TEMPERATURES NEAR SEASONABLE LEVELS….

Skies have been mainly sunny today after a deck of clouds moved
out of the area just after sunrise this morning. More in the way
of pop up diurnal clouds developed late this morning and early
this afternoon, but they have remained widely scattered. A frontal
boundary pushed through just after 8am this morning almost
unnoticed except for the wind shift from west to north-northwest
and a sharp increase in speed.

Temperatures have finally warmed up a bit after a few days of 50F
or below. Readings have reached the mid 60s early this afternoon,
which is just slightly above normal for the date. Dew point values
which started the day in the low 40s, have since dropped to the
upper 20s following the frontal passage and mixing from aloft.

Winds were light this morning, but as mentioned, increased markedly
following the frontal passage. The average speed for the day so far
is around 10mph, but the trend is going up. The peak gust so far
today is 43mph, which occurred just before 12:30pm.

Visibility was limited to around 20 miles early this morning due to
thin fog and haziness, but has improved quite a bit to 60-70 miles
by early this afternoon.

The maximum temperature so far today is 64F degrees, which is
4 degrees above the normal high of 60F. The minimum temperature
since midnight is 41F degrees, which is equal to the normal low of
41F.

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Today’s Observations:

7 A.M.
Weather: Broken cirrus, few altocumulus/castellanus distant WSW-NW-E
Temperature: 46F; Dew Point: 41F; Relative Humidity: 84%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1013.2 mb; 29.92 in. Hg: falling, then more slowly
Visibility: 20 miles, thin fog
6-hr Max temp: 46F
6-hr Min temp: 41F
24-hr Precip: Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E250 BKN 20 132/46/41/2706/992/ FEW AC/ACC DSNT WSW-NW-E
THN F ALQDS WND LGT/ 8/081 56011 70000 10046 20041

10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 59F; Dew Point: 32F; Relative Humidity: 36%
Wind: NNW @ 17G29 kts, peak wind NNW 33mph at 9:49 A.M.
Sea-level pressure: 1012.6 mb; 29.90 in. Hg: falling, then steady
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 50 SCT 250 SCT 60 126/59/32/3417G29/990/ PK WND 3329/49/
8/201 56006

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 63F; Dew Point: 29F; Relative Humidity: 27%
Wind: NW @ 16G30 kts, peak wind NW 43mph at 12:22 P.M.
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 64F
6-hr Min temp: 46F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 55 SCT 250 SCT 70 109/63/29/3216G30/985/ PK WND 3237/22/
8/201 56017 10064 20046

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SUMMARY FOR WEDNESDAY, APRIL 22, 2026

TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..59
MIN…….34 NORMAL…..41
MEAN……39 NORMAL…..50

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………-11
TOTAL DEPARTURE FOR THE MONTH………………………+46 [+1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….26 DEPARTURE…….+11
TOTAL HEATING UNITS FOR THE MONTH (MAR)………389 DEPARTURE…….-43
TOTAL HEATING UNITS FOR THE SEASON………….5707 DEPARTURE…….-72
TOTAL HEATING UNITS LAST SEASON TO DATE……..5350 DEPARTURE……+357

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 *=Last of multiple occurrences

F420C (Official)………..31 SSW @ 10:16 A.M.
VECTOR #1 (1-Sec)……….31 SSW @ 10:26 A.M.
VECTOR #2 (1-Sec)……….32 SSW @ 10:14 A.M.
DAVIS #1……………….33 S @ 10:14 A.M.
DAVIS #2 ………………33 S @ 10:05 A.M.
RMY #1 (Instantaneous)…..32 SSW @ 10:26 A.M.
RMY #2 (Instantaneous)…..32 SSW @ 10:26 A.M.
MERLIN…………………28 SSW
RICHARDS (C5C) (Inst)……30 SSW @ 10:16 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SSW @ 10:28 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 SSW @ 10:15 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 SSW @ 10:28 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 S @ 10:15 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………26 S @ 11:55 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 SSW @ 10:15 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SSW @ 10:28 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 SSW @ 10:14 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.1 SSW [290 total miles] VECTOR #1………………12.8
VECTOR #2………………13.2
DAVIS #1……………….12.6 S
DAVIS #2……………….13.9 SSW
RMY #1…………………12.6 SSW
RMY #2…………………13.4 SSW
RICHARDS (C5C)………….12.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH (APR)……..1.79 DEPARTURE…..-1.82
TOTAL PRECIPITATION FOR THE YEAR (2026)…….13.46 DEPARTURE…..-4.17

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH (APR)…………TRACE DEPARTURE…..-2.7
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+12.0

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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 73/38/56/+15/0.16/0.0/061/08 35 NE VEC1 34 ENE RMY 35
4/2 38/34/36/-5/0.45/0.0/000/00 31 E VEC1 31 E RMY 33
4/3 67/35/51/+9/0.04/0.0/270/35 31 SW VEC1 31 SW RMY 35
4/4 58/35/47/+5/0.01/0.0/093/12 39 ENE VEC1 38 ENE RMY 42
4/5 55/36/46/+3/0.16/0.0/008/01 35 NW VEC1 36 NW RMY 38
4/6 50/32/41/-2/0.00/0.0/708/91 46 WNW VEC1 46 WNW RMY 47
4/7 50/29/40/-4/0.10/T/336/43 39 WNW VEC1 39 WNW RMY 41
4/8 43/25/34/-10/0.00/0.0/753/96 30 NNW VEC1 31 NNW RMY 32
4/9 56/30/43/-1/0.00/0.0/755/96 35 S VEC1 35 SSW RMY 35
4/10 67/33/50/+5/0.00/0.0/672/85 37 S VEC1 36 SSW RMY 37
4/11 60/41/51/+6/0.00/0.0/690/87 37 NW VEC1 37 NW RMY 37
4/12 54/35/45/-1/0.02/0.0/549/69 28 S VEC1 28 S RMY 28
4/13 69/41/55/+9/T/0.0/168/21 40 SSW VEC1 41 SSW RMY 42
4/14 83/58/71/+24/0.15/0.0/617/77 46 SSW VEC1 46 SSW RMY 47
4/15 77/44/61/+14/T/0.0/626/78 25 NE VEC1 25 NE RMY 24
4/16 69/45/57/+10/0.37/0.0/347/43 45 NW VEC1 44 NW RMY 50 TSTM
4/17 62/47/55/+7/0.14/0.0/145/18 31 NE VEC1 32 NNW RMY 31
4/18 48/41/45/-3/0.04/0.0/008/01 28 ENE VEC1 26 E RMY 27
4/19 49/34/42/-7/0.14/T/000/00 40 NW VEC1 39 NW RMY 42 TSTM
4/20 50/31/41/-8/T/T/596/73 31 W VEC1 30 W RMY 32
4/21 50/31/41/-9/0.00/0.0/812/99 28 S VEC1 29 S RMY 28
4/22 44/34/39/-11/T/0.0/000/00 31 SSW VEC1 31 SSW RMY 32