Saturday, June 7, 2025

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

SATURDAY, JUNE 7, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET:  1919E

OVERCAST AND HUMID TO START, SHOWERS MOVING IN FOR THE AFTERNOON

Low clouds have filled the sky all day today, evoking a bit of a gloomy
feel. The morning hours remained dry for the most part, with occasional
showers not beginning until around noon. The total rainfall thus far is
only 0.02″. We seem to be located very close to a boundary, as dense fog
is slowly advancing in from the north and winds have gone calm.

Despite the cloud cover, temperatures today are seasonable, thanks to
light southerly flow during the morning hours. The low this morning was
in the mid 60s, and we have since slowly climbed into the low 70s. It is
a bit sticky out there, as the dew point remains in the mid to upper 60s.

Winds are light, even going calm occasionally during the late morning
hours, and again at the final observation. The average speed so far
is 6mph. The peak gust occurred early this morning, with a speed of 17mph
a bit before 3am.

Visibility remains poor due to fog and the low cloud deck. This has
ranged between 1/4 and 30 miles today, varying by sector.

The maximum temperature for today is 72F degrees, which is 1 degree
below the normal high of 73F. The minimum temperature since midnight
is 64F degrees, which is 9 degrees above the normal low of 55F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 67F; Dew Point: 66F; Relative Humidity: 98%
Wind: SSW @ 3 kts, wind light
Sea-level pressure: 1011.3 mb; 29.86 in. Hg: rising, then falling
Visibility: 8 miles, 3 miles E-SSW, thin fog all quadrants
6-hr Max temp: 67F
6-hr Min temp: 64F
24-hr Precip:  0.00 inches
BHO SA 1155 E3 OVC 8 113/67/66/2003/986/ THN F ALQDS VSBY 3 E-SSW WND LGT/
8/6// 50005 10067 20064

10 A.M.
Weather: Overcast stratocumulus
Temperature: 70F; Dew Point: 67F; Relative Humidity: 91%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1010.3 mb; 29.83 in. Hg: steady, then falling
Visibility: 10 miles, thin fog all quadrants
3-hr Precip:  0.00 inches
BHO SA 1455 E5 OVC 10 103/70/67/2204/983/ THN F ALQDS WND LGT/ 8/5// 58010

1 P.M.
Weather: Broken stratocumulus, overcast nimbostratus, light rain
Temperature: 69F Dew Point: 68F; Relative Humidity: 97%
Wind: Calm
Sea-level pressure: 1008.2 mb; 29.77 in. Hg: falling, then more rapidly
Visibility: 15 miles, 2 WSW-W, 1/4 WNW-ESE, 30 ESE-WSW, thin fog all quadrants
6-hr Max temp: 71F
6-hr Min temp: 67F
6-hr Precip:  0.02 inches
BHO SA 1755 E10 BKN 40 OVC 15R- 082/69/68/0000/977/ FEW LWR STFRA ALQDS
THN F ALQDS VSBY 2 WSW-W 1/4 WNW-ESE 30 ESE-WSW WND CALM/ 8/72/ 58021
6002/ 10071 20067

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SUMMARY FOR FRIDAY, JUNE 6, 2025

TEMPERATURE (DEGREES F)
MAX…….81   NORMAL…..72
MIN…….63   NORMAL…..55
MEAN……72   NORMAL…..63

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+9
TOTAL DEPARTURE FOR THE MONTH………………………+24 [+3.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………….16  DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE SEASON………….5631  DEPARTURE……-539
TOTAL HEATING UNITS LAST SEASON TO DATE……..5379  DEPARTURE……+252

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..7  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………….23  DEPARTURE…….+11
TOTAL COOLING UNITS FOR THE SEASON……………40  DEPARTURE………0
TOTAL COOLING UNITS LAST SEASON TO DATE……….51  DEPARTURE…….-11

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 ENE  @   06:43 A.M.
VECTOR #1 (1-Sec)……….27 NE   @   06:03 A.M.
VECTOR #2 (1-Sec)……….28 ENE  @   06:37 A.M.
DAVIS #1……………….26 ENE  @   06:03 A.M.
DAVIS #2 ………………25 E    @   06:41 A.M.
RMY #1 (Instantaneous)…..27 ENE  @   06:26 A.M.
RMY #2 (Instantaneous)…..27 ENE  @   06:41 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 ENE  @   06:44 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17      @   06:33 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20      @   06:33 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 ENE  @   06:33 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 ENE  @   06:38 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 ENE  @   06:34 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NE   @   06:33 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.3 ENE [222 total miles] VECTOR #1……………….9.2
VECTOR #2……………….9.8
DAVIS #1………………..9.7 ENE
DAVIS #2………………..9.7 ENE
RMY #1………………….9.2 ENE
RMY #2………………….9.7 ENE
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…………..0.01 DEPARTURE…..-0.95
TOTAL PRECIPITATION FOR THE YEAR (2025)…….21.75 DEPARTURE…..-1.81

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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/…/..          18 WSW VEC1 18 SW  RMY 19
6/6   81/63/72/=9/0.00/…/..           26 ENE VEC1 27 NE  RMY 27

6/7 The low since midnight is 64F, the daily normal low is 55F.

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JUNE DAILY RECORDS TO DATE

NONE.

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

RECORDS FOR JUNE 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.11 INS IN 1923
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

TODAY’S REPORT PREPARED BY: Joshua Polen