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Thursday, June 12, 2025

June 13, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 12, 2025 ALL TIMES ARE…

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

THURSDAY, JUNE 12, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1922E

MAINLY SUNNY AND WARM WITH A GUSTY WESTERLY WIND….

Sunshine has been the theme for most of the day with the exception
of a brief period during the mid to late morning hours when a
batch of thicker high clouds passed through the area. Otherwise
it’s been another hazy sky as a thin smoke layer from the Canadian
wildfires continues to pass overhead in the upper levels.

Temperatures have warmed to into the mid 80s this afternoon after
a rather “warm” overnight where the low only made it down to the
mid 60s. It was also humid this morning with the dew point in the
low 60s, however as mixing from aloft has maximized this afternoon,
moisture levels have dropped off fairly significantly as reflected
by dew point values down into the low 50s.

Winds have been busy today out of a westerly direction. The average
speed for the day is around 16mph. Gusts have been frequently
exceeding 30-35mph since the mid morning hours. The peak gust for
the day so far is 44mph, which occurred just before 2pm this
afternoon.

Visibility has been decreasing through the day, starting at around
25 miles early this morning, but dropping to as low as 10 miles,
especially in the northerly and easterly quadrants. All of this
obstruction is due to haziness, likely tied to the wildfire smoke.

The maximum temperature for today is 84F degrees, which is 10
degrees above the normal high of 74F. The minimum temperature since
midnight is 64F degrees, which is 7 degrees above the normal low
of 57F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant SE-WSW, thin smoke layer aloft
all quadrants
Temperature: 70F; Dew Point: 60F; Relative Humidity: 70%
Wind: WSW @ 11G19 kts
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: rising, then steady
Visibility: 25 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 64F
24-hr Precip:  0.00 inches
BHO SA 1155 CLR 25 147/70/60/2411G19/996/ FEW CI DSNT SE-WSW
THN K LYR ALF ALQDS HAZY/ 8/001 51002 10070 20064

10 A.M.
Weather: Broken cirrus/cirrocumulus, thin smoke layer aloft all
quadrants
Temperature: 80F; Dew Point: 61F; Relative Humidity: 52%
Wind: W @ 15G25 kts
Sea-level pressure: 1013.7 mb; 29.93 in. Hg: falling, then more rapidly
Visibility: 20 miles, hazy
3-hr Precip:  0.00 inches
BHO SA 1455 E250 BKN 20 137/80/61/2815G25/993/ THN K LYR ALF ALQDS
HAZY/ 8/009 58010

1 P.M.
Weather: Clear, few cirrus all quadrants, thin smoke layer aloft
all quadrants
Temperature: 84F Dew Point: 53F; Relative Humidity: 35%
Wind: W @ 20G28 kts, peak wind W 35mph at 12:41 P.M.
Sea-level pressure: 1013.0 mb; 29.91 in. Hg: rising, then falling
Visibility: 20 miles, 10 miles NW-N-E, hazy
6-hr Max temp: 84F
6-hr Min temp: 70F
6-hr Precip:  0.00 inches
BHO SA 1755 CLR 20 130/84/53/2820G28/991/ FEW CI ALQDS THN K LYR ALF
ALQDS VSBY 10 NW-N-E HAZY PK WND 2830/41/ 8/001 58007 10084 20070

————————————————————–

SUMMARY FOR WEDNESDAY, JUNE 11, 2025

TEMPERATURE (DEGREES F)
MAX…….81   NORMAL…..74
MIN…….58   NORMAL…..56
MEAN……70   NORMAL…..65

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+5
TOTAL DEPARTURE FOR THE MONTH………………………+15 [+1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………….34  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON………….5649  DEPARTURE……-537
TOTAL HEATING UNITS LAST SEASON TO DATE……..5387  DEPARTURE……+262

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..5  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH…………….31  DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE SEASON……………48  DEPARTURE……..-4
TOTAL COOLING UNITS LAST SEASON TO DATE……….56  DEPARTURE……..-8

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)……….E32 WSW  @   01:47 P.M.
VECTOR #1 (1-Sec)……….32 WSW  @   01:47 P.M.
VECTOR #2 (1-Sec)……….31 WSW  @   01:11 P.M.
DAVIS #1……………….31 SW   @   01:47 P.M.
DAVIS #2 ………………30 WSW  @   01:11 P.M.
RMY #1 (Instantaneous)…..33 WSW  @   01:47 P.M.
RMY #2 (Instantaneous)…..32 SW   @   01:20 P.M.
MERLIN…………………31 WSW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WSW  @   02:14 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @   03:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21      @   03:57 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 SW   @   01:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 WSW  @   03:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 WSW  @   03:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SW   @   03:57 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.7 W [304 total miles] VECTOR #1………………12.5
VECTOR #2………………12.8
DAVIS #1……………….12.8 WSW
DAVIS #2……………….12.9 WSW
RMY #1…………………12.1 WSW
RMY #2…………………12.7 WSW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..1.17 DEPARTURE…..-0.60
TOTAL PRECIPITATION FOR THE YEAR (2025)…….22.91 DEPARTURE…..-1.46

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

6/1   63/47/55/-7/0.01/588/65           40 W   VEC1 40 W   RMY 42
6/2   70/48/59/-3/T/780/86              25 WNW VEC1 25 WSW RMY 26
6/3   79/50/65/+3/0.00/853/94           23 SSW VEC1 23 SSW RMY 21
6/4   84/58/71/+8/0.00/708/78           26 SW  VEC1 27 SW  RMY 28
6/5   93/61/77/+14/0.00/819/90          18 WSW VEC1 18 SW  RMY 19
6/6   81/63/72/+9/0.00/382/42           26 ENE VEC1 27 NE  RMY 27
6/7   71/60/66/+2/0.95/000/00           26 NE  VEC1 26 NE  RMY 25 TSTM
6/8   67/55/61/-3/0.00/347/38           22 ENE VEC1 21 ENE RMY 22
6/9   61/55/58/-6/0.01/000/00           20 E   VEC1 21 E   RMY 20
6/10  62/54/58/-7/0.20/000/00           21 W   VEC1 20 W   RMY 20
6/11  81/58/70/+5/0.00/850/93           32 WSW VEC1 32 WSW RMY 33

6/12 The low since midnight is 64F, the daily normal low is 57F.

————————————————————–

JUNE DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR JUNE 12
HIGH 94F IN 2017
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991

RECORDS FOR JUNE 13
HIGH 93F IN 1988
LOW 43F IN 1982
PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956

TODAY’S REPORT PREPARED BY: MFD

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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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