Thursday, April 30, 2026

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

THURSDAY, APRIL 30, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0441E
SUNSET: 1843E

DREARY AND WET THROUGH THE MORNING WITH CHILLY TEMPERATURES….

A frontal system has been pushing through the region today bringing
some much needed rain showers to the area, albeit not nearly enough.
Clouds and fog have also accompanied the rain keeping things quite
dreary and dank. 0.09″ of rain was measured by 7am this morning with
an additional 0.12″ falling between 7am and 1pm. Despite this bit
of water, we will finish the month of April significantly below
normal in the precipitation department.

Temperatures remain below normal with readings struggling through
the 40s this morning and reaching the low 50s early this afternoon.
Dew points have been close to the temperature as one would expect
with the saturated to near saturated air mass in place today.

Winds have been very light today, and at times calm. The average
speed for the day so far is only around 4mph. The peak gust so far
is a measly 13mph, which occurred just after 5:30am this morning.

Visibility has been limited most of the day due to the rain and
fog. The view has been as high as 25 miles for a time in between
periods of rain, and as low as 1/8th of a mile when the cloud deck
lowers over the summit

The maximum temperature so far today is 51F degrees, which is 12
degrees below the normal high of 63F. The minimum temperature
since midnight is 43F degrees, which is equal to the normal low
of 43F.

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Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 300ft
Temperature: 45F; Dew Point: 45F; Relative Humidity: 100%
Wind: N @ 2 kts, wind light
Sea-level pressure: 1009.1 mb; 29.80 in. Hg: falling, then rising
Visibility: 1/4 mile, fog
6-hr Max temp: 45F
6-hr Min temp: 43F
24-hr Precip: 0.09 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W3 1/4F 091/45/45/3502/980/ R-B05E12B25E32 WND LGT/
8//// 53001 6006/ 70009 10045 20043

10 A.M.
Weather: Broken stratocumulus, overcast stratus, lower stratus
fractus all quadrants, very light rain
Temperature: 46F; Dew Point: 46F; Relative Humidity: 100%
Wind: Calm
Sea-level pressure: 1008.2 mb; 29.77 in. Hg: falling, then more rapidly
Visibility: 10 miles, 20 miles NE-SE, 5 miles S-W-N, thin fog
3-hr Precip: 0.04 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E3 BKN 25 OVC 10R- 082/46/46/0000/977/ LWR STFRA ALQDS
THN F ALQDS R-B17E41B55 PCPN VRY LGT VSBY 20 NE-SE 5 S-W-N WND CALM/
8/7// 58009 6004/

1 P.M.
Weather: Broken stratocumulus, overcast altostratus, lower stratus
fractus SW-N
Temperature: 51F; Dew Point: 49F; Relative Humidity: 94%
Wind: SSW @ 2 kts, wind light
Sea-level pressure: 1007.3 mb; 29.75 in. Hg: falling, then more rapidly
Visibility: 25 miles, 10 miles SW-N, thin fog
6-hr Max temp: 51F
6-hr Min temp: 45F
6-hr Precip: 0.12 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E6 BKN 35 OVC 25 073/51/49/2102/975/ LWR STFRA SW-N
THN F ALQDS VSBY 10 WNW-N WND LGT/ 8/72/ 58009 6012/ 10051 20045

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SUMMARY FOR WEDNESDAY, APRIL 29, 2026

TEMPERATURE (DEGREES F)
MAX…….53 NORMAL…..62
MIN…….42 NORMAL…..43
MEAN……48 NORMAL…..53

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………+28 [+0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….17 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH (MAR)………501 DEPARTURE…….-27
TOTAL HEATING UNITS FOR THE SEASON………….5819 DEPARTURE…….-56
TOTAL HEATING UNITS LAST SEASON TO DATE……..5395 DEPARTURE……+424

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)………..23 ENE @ 12:32 P.M.
VECTOR #1 (1-Sec)……….23 ENE @ 10:37 A.M.
VECTOR #2 (1-Sec)……….23 NE @ 10:37 A.M.
DAVIS #1……………….23 ENE @ 10:37 A.M.
DAVIS #2 ………………21 ENE @ 10:37 A.M.
RMY #1 (Instantaneous)…..24 ENE @ 10:37 A.M.
RMY #2 (Instantaneous)…..22 NE @ 10:37 A.M.
MERLIN…………………22 ENE
RICHARDS (C5C) (Inst)……22 ENE @ 10:37 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 ENE @ 10:56 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 NE @ 10:38 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 ENE @ 10:55 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 ENE @ 12:34 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 E @ 10:55 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 NE @ 10:38 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ENE @ 10:55 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 ENE @ 10:54 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.8 ENE [162 total miles] VECTOR #1……………….7.7
VECTOR #2……………….8.3
DAVIS #1………………..8.1 ENE
DAVIS #2………………..8.1 ENE
RMY #1………………….7.8 NE
RMY #2………………….8.1 NE
RICHARDS (C5C)…………..8.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.05
TOTAL PRECIPITATION FOR THE MONTH (APR)……..1.88 DEPARTURE…..-2.74
TOTAL PRECIPITATION FOR THE YEAR (2026)…….13.55 DEPARTURE…..-5.09

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH (APR)…………TRACE DEPARTURE…..-2.8
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+11.9

————————————————————–

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
4/23 65/40/53/+3/0.00/0.0/…/.. 43 NW VEC1 43 NW RMY 49
4/24 56/35/46/-5/0.00/0.0/…/.. 23 NNW VEC1 24 NNW RMY 23
4/25 51/36/44/-7/0.00/0.0/…/.. 18 NE VEC1 18 NE RMY 19
4/26 57/41/49/-3/0.00/0.0/…/.. 16 ENE VEC1 16 ENE RMY 16
4/27 63/44/54/+2/0.00/0.0/…/.. 23 ENE VEC1 23 ENE RMY 23
4/28 56/41/49/-3/0.00/0.0/…/.. 24 E VEC1 25 E RMY 24
4/29 53/42/48/-5/0.02/0.0/…/.. 23 ENE VEC1 23 ENE RMY 24