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Wednesday, May 14, 2025

May 14, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, MAY 14, 2025 ALL TIMES ARE…

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

WEDNESDAY, MAY 14, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0423E
SUNSET:  1858E

A MIX OF SUN AND CLOUDS TODAY WITH MILD TEMPERATURES….

We’ve been treated to yet another nice day today as we’ve seen
sun mixing with clouds, light wind, and slightly above normal
temperatures.

Temperatures have reached the low to mid 70s early this afternoon
with dew point values creeping up from the upper 40s to the mid
50s. So it is a bit more humid today than the past couple of days,
but it’s still quite comfortable out there, at least for now.

Winds have been on the light side today, averaging at around 7mph
from mainly an easterly direction. The peak gust for the day
occurred back after midnight with a value of 18mph.

Visibility has been somewhat limited all day due to haziness, much
of which from pollen. The view has been stuck around 30 miles all
day.

The maximum temperature for today is 73F degrees, which is 7 degrees
above the normal high of 66F. The minimum temperature since midnight
is 48F degrees, which is equal to the normal low of 48F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Thin broken cirrus, few stratocumulus SE-SW-NNW, few altocumulus
distant S-SW
Temperature: 56F; Dew Point: 49F; Relative Humidity: 78%
Wind: SE @ 3 kts, wind light
Sea-level pressure: 1024.2 mb; 30.25 in. Hg: rising, then steady
Visibility: 30 miles, hazy
6-hr Max temp: 56F
6-hr Min temp: 48F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E250 -BKN 30 242/56/49/1303/025/ FEW SC SE-SW-NNW
FEW AC DSNT S-SW HAZY WND L/V/ 8/551 51008 10056 20048

10 A.M.
Weather: Thin broken cirrus, few altostratus distant SSW-NW,
few altocumulus distant SSE-SW-W
Temperature: 65F; Dew Point: 53F; Relative Humidity: 66%
Wind: SE @ 3 kts, wind light
Sea-level pressure: 1023.8 mb; 30.23 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 -BKN 30 238/65/53/1303/023/ FEW AS DSNT SSW-NW
FEW AC DSNT SSE-SW-W HAZY WND LGT/ 8/074 58004

1 P.M.
Weather: Thin broken cirrus, few cumulus distant SE-SW-NNW,
few altostratus distant S-W-NW, few altocumulus OVHD-SE-SW-WNW
Temperature: 71F Dew Point: 55F; Relative Humidity: 57%
Wind: ENE @ 6 kts, wind light
Sea-level pressure: 1022.1 mb; 30.18 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 72F
6-hr Min temp: 56F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E250 -BKN 30 221/71/55/0606/018/ FEW CU DSNT SE-SW-NNW
FEW AS DSNT S-W-NW FEW AC OVHD-SE-SW-WNW HAZY WND LGT/ 8/271 58017
10072 20056

————————————————————–

SUMMARY FOR TUESDAY, MAY 13, 2025

TEMPERATURE (DEGREES F)
MAX…….70   NORMAL…..66
MIN…….51   NORMAL…..47
MEAN……61   NORMAL…..57

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+48 [+3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..4  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………….84  DEPARTURE…….-51
TOTAL HEATING UNITS FOR THE SEASON………….5482  DEPARTURE……-540
TOTAL HEATING UNITS LAST SEASON TO DATE……..5309  DEPARTURE……+173

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………..4  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON…………….7  DEPARTURE……..-2
TOTAL COOLING UNITS LAST SEASON TO DATE………..2  DEPARTURE……..+5

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)………..26 ESE  @   09:53 A.M.
VECTOR #1 (1-Sec)……….27 ESE  @   09:53 A.M.
VECTOR #2 (1-Sec)……….24 ESE  @   09:47 A.M.
DAVIS #1……………….26 ESE  @   09:53 A.M.
DAVIS #2 ………………25 S    @   06:54 P.M.
RMY #1 (Instantaneous)…..26 ESE  @   09:53 A.M.
RMY #2 (Instantaneous)…..25 ESE  @   08:06 A.M.
MERLIN…………………24 ESE
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 E    @   05:21 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17      @   08:06 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16      @   04:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 E    @   05:20 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S    @   05:07 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 ESE  @   08:06 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 SSE  @   04:41 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.2 E [245 total miles] VECTOR #1………………10.1
VECTOR #2………………10.6
DAVIS #1……………….10.5 ESE
DAVIS #2……………….10.6 ESE
RMY #1…………………10.0 ESE
RMY #2…………………10.6 ESE
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..2.72 DEPARTURE…..+1.15
TOTAL PRECIPITATION FOR THE YEAR (2025)…….16.84 DEPARTURE…..-3.51

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 MAY 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/+3/0.00/0.0/744/88        28 S   VEC1 28 SSW RMY 28
5/2   79/47/63/+9/0.19/0.0/339/40        28 SE  VEC1 29 SE  RMY 25 TSTM
5/3   84/54/69/+15/0.15/0.0/561/66       43 SSW VEC1 42 SSW RMY 44 TSTM
5/4   77/50/64/+10/0.06/0.0/256/30       33 SW  VEC1 34 SW  RMY 32
5/5   50/46/48/-7/0.26/0.0/000/00        35 ENE VEC1 35 ENE RMY 36
5/6   61/48/55/0/0.57/0.0/000/00         26 S   VEC1 27 ENE RMY 27
5/7   72/54/63/+8/0.01/0.0/310/36        33 SSW VEC1 33 SW  RMY 35
5/8   74/51/63/+8/0.04/0.0/…/..        18 ESE VEC1 18 ESE RMY 18
5/9   51/46/49/-7/1.15/0.0/…/..        33 E   VEC1 34 ENE RMY 35
5/10  62/45/54/-2/0.29/0.0/…/..        36 NW  VEC1 37 NW  RMY 41
5/11  70/49/60/+4/0.00/0.0/…/..        33 NW  VEC1 32 NW  RMY 34
5/12  73/46/60/+3/0.00/0.0/…/..        36 SW  VEC1 34 SW  RMY 36
5/13  70/51/61/+4/0.00/0.0/…/..        26 ESE VEC1 27 ESE RMY 26

5/14 The low since midnight is 48F, the daily normal low is 48F.

————————————————————–

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 14
HIGH 85F IN 1961,2022
LOW 33F IN 1895
PRECIP 1.93 INCHES IN 2006
PEAK GUST 53 MPH S IN 2009

RECORDS FOR MAY 15
HIGH 93F IN 1900
LOW 36F IN 1947,1985
PRECIP 1.63 INCHES IN 1978
PEAK GUST 53e MPH NE IN 1978, W 2002

TODAY’S REPORT PREPARED BY: MFD/AMK

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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