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Saturday, May 3, 2025

May 3, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, MAY 3, 2025 ALL TIMES ARE…

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

SATURDAY, MAY 3, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0436E
SUNSET:  1846E

WARM AND HUMID WITH PLENTY OF SUNSHINE….

We began the morning here with dense fog, which dissipated shortly after
sunrise. A clearing trend took hold through the late morning, with
just some cirrus and altocumulus clouds in the distance. Around 10:30am
cumulus began to develop, with coverage peaking around noon time.
Cumulonimbus were observed in the distance to our N-NNE at the final
observation.

Temperatures today are well above normal, reaching the 80F mark not long
after 10am! We have only climbed a touch more since, with a high so far
of 84F. It does feel a bit sticky out there, as the dew point has held
around 60F since late morning.

Winds have been steady out of the south, picking up as the day has
progressed. The average speed so far is 11mph, with a peak gust to 35mph
just after 12:30pm.

Visibility remains poor, mostly due to the moisture and pollen in the
air. Views have yet to exceed 30 miles.

The maximum temperature for today is 84F degrees, which is 21 degrees
above the normal high of 63F. The minimum temperature since midnight
is 54F degrees, which is 10 degrees above the normal low of 44F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus/altocumulus castellanus,
scattered cirrus
Temperature: 59F; Dew Point: 57F; Relative Humidity: 93%
Wind: S @ 8 kts
Sea-level pressure: 1013.3 mb; 29.92 in. Hg: rising, then more rapidly
Visibility: 10 miles, thin fog all quadrants
6-hr Max temp: 59F
6-hr Min temp: 54F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 110 SCT 250 SCT 10 133/59/57/1908/992/ THN F ALQDS/ 8/081
53009 70000 10059 20054

10 A.M.
Weather: Scattered cirrus, few cumulus distant NNW-NNE,
few altocumulus distant S-W-NNE
Temperature: 78F; Dew Point: 60F; Relative Humidity: 54%
Wind: S @ 8 kts
Sea-level pressure: 1012.5 mb; 29.90 in. Hg: steady, then falling
Visibility: 20 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 SCT 20 125/78/60/1808/990/ FEW CU DSNT NNW-NNE
FEW AC DSNT S-W-NNE HAZY/ 8/251 58008

1 P.M.
Weather: Scattered cumulus, thin broken cirrus,
cumulonimbus distant N-NNE
Temperature: 82F Dew Point: 59F; Relative Humidity: 45%
Wind: SSW @ 16G27 kts, peak wind SSW 35mph @ 12:38pm
Sea-level pressure: 1010.8 mb; 29.85 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 59F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 50 SCT E250 -BKN 30 108/82/59/2116G27/985/ CB DSNT N-NNE
HAZY PK WND 2030/38/ 8/301 56017 10084 20059

————————————————————–

SUMMARY FOR FRIDAY, MAY 2, 2025

TEMPERATURE (DEGREES F)
MAX…….79   NORMAL…..63
MIN…….47   NORMAL…..44
MEAN……63   NORMAL…..54

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+9
TOTAL DEPARTURE FOR THE MONTH………………………+12 [+5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..2  DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE MONTH…………….11  DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE SEASON………….5409  DEPARTURE……-502
TOTAL HEATING UNITS LAST SEASON TO DATE……..5182  DEPARTURE……+227

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON…………….3  DEPARTURE……..-1
TOTAL COOLING UNITS LAST SEASON TO DATE………..0  DEPARTURE……..+3

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)………..28 SE   @   04:50 A.M.
VECTOR #1 (1-Sec)……….29 SE   @   04:50 A.M.
VECTOR #2 (1-Sec)……….27 SE   @   04:51 A.M.
DAVIS #1……………….27 S    @   07:08 P.M.
DAVIS #2 ………………33 S    @   01:42 A.M.
RMY #1 (Instantaneous)…..25 SE   @   04:50 A.M.
RMY #2 (Instantaneous)…..28 SE   @   04:50 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SE   @   04:51 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22      @   04:52 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22      @   04:52 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 SE   @   04:52 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 SE   @   04:53 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SE   @   04:51 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SE   @   04:52 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.6 S [254 total miles] VECTOR #1………………11.1
VECTOR #2………………10.6
DAVIS #1……………….10.5 S
DAVIS #2……………….11.6 SSW
RMY #1…………………10.7 SSW
RMY #2…………………11.5 S
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.19 DEPARTURE…..-0.06
TOTAL PRECIPITATION FOR THE YEAR (2025)…….14.31 DEPARTURE…..-4.72

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE SEASON (2024-2025)……35.8 DEPARTURE…..-33.9

————————————————————–
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

5/1   69/43/56/+3/0.00/0.0/…/..        28 S   VEC1 28 SSW RMY 28
5/2   79/47/63/+9/0.19/0.0/…/..        28 SE  VEC1 29 SE  RMY 25 TSTM

5/3 The low since midnight is 54F, the daily normal low is 44F.

————————————————————–

MAY DAILY RECORDS TO DATE

NONE.

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR MAY 3
HIGH 92F IN 2001
LOW 31F IN 1888
PRECIP 2.25 INS IN 1900
SNOWFALL TRACE IN 1908, 1985
PEAK GUST 71 MPH W IN 2002

RECORDS FOR MAY 4
HIGH 90F IN 2001
LOW 27F IN 1911 (RECORD FOR MAY)
PRECIP 1.67 INCHES IN 1893
SNOWFALL 0.1 INCHES IN 1920
PEAK GUST 60 MPH NW IN 1966

TODAY’S REPORT PREPARED BY: Joshua Polen

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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