Monday, June 9, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JUNE 9, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET: 1920E
OVERCAST CONDITIONS CONTINUE WITH A COOL ONSHORE BREEZE AND LIMITED
VISIBILITY
We are currently stuck in a no man’s land region between an
approaching upper trough to the west, and departing upper ridge
to the east. As such there is very little wind flow up through
the mid levels of the atmosphere which is helping a rather
strong inversion to hang tough in the low levels. As a result,
we are stuck under an overcast deck of clouds which has persisted
all day. The high moisture content of the air with the light
onshore flow has also resulted in thin fog limiting visibility
generally under 15 miles all day.
With the lack of sunshine and the wind off the ocean, temperatures
have been held back today, only reaching the low 60s for a time
late this morning, but have dropped back into the upper 50s early
this afternoon. This is 10-15F degrees below the expected values
for this time of year. As mentioned the air has a high moisture
content, as noted by the dew point holding in the mid to upper 50s.
The wind has been averaging around 8mph today out of mainly the east
and east-northeast. The peak gust for the day so far is 20mph, which
occurred just after 9:30am this morning.
As mentioned, the visibility has been limited today ranging from 4
miles up to 15 miles. The lowest values have been occurring early
this afternoon and have been the most restricted in the northerly and
easterly sectors.
The maximum temperature for today is 61F degrees, which is 12 degrees
below the normal high of 73F. The minimum temperature since midnight
is 55F degrees, which is 1 degree below the normal low of 56F.
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Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast altocumulus
Temperature: 58F; Dew Point: 55F; Relative Humidity: 90%
Wind: E @ 8 kts
Sea-level pressure: 1016.7 mb; 30.02 in. Hg: rising, then more slowly
Visibility: 12 miles, 15 miles ESE-S-WNW, 9 miles NW-N-E, thin fog
6-hr Max temp: 58F
6-hr Min temp: 55F
24-hr Precip: 0.00 inches
BHO SA 1155 E15 BKN 65 OVC 12 167/58/55/0808/002/ THN F ALQDS
VSBY 15 ESE-S-WNW 9 NW-N-E/ 8/55/ 51011 10058 20055
10 A.M.
Weather: Overcast stratocumulus
Temperature: 60F; Dew Point: 58F; Relative Humidity: 93%
Wind: E @ 7 kts
Sea-level pressure: 1016.6 mb; 30.02 in. Hg: rising, then falling
Visibility: 12 miles, 15 miles ESE-S-WNW, 9 miles NW-N-E, thin fog
3-hr Precip: 0.00 inches
BHO SA 1455 E10 OVC 12 166/60/58/1007/002/ THN F ALQDS VSBY 15 ESE-S-WNW
9 NW-N-E/ 8/5// 58001
1 P.M.
Weather: Overcast stratus
Temperature: 59F Dew Point: 58F; Relative Humidity: 94%
Wind: ENE @ 8 kts
Sea-level pressure: 1016.7 mb; 30.02 in. Hg: rising, then falling
Visibility: 4 miles, 8 miles ESE-SSW, fog
6-hr Max temp: 61F
6-hr Min temp: 58F
6-hr Precip: 0.00 inches
BHO SA 1755 E3 OVC 4F 167/59/58/0708/002/ VSBY 8 ESE-SSW/ 8/6//
50001 10061 20058
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SUMMARY FOR SUNDAY, JUNE 8, 2025
TEMPERATURE (DEGREES F)
MAX…….67 NORMAL…..73
MIN…….55 NORMAL…..55
MEAN……61 NORMAL…..64
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-3
TOTAL DEPARTURE FOR THE MONTH………………………+23 [+2.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..4 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………….20 DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE SEASON………….5635 DEPARTURE……-542
TOTAL HEATING UNITS LAST SEASON TO DATE……..5380 DEPARTURE……+255
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH…………….26 DEPARTURE…….+10
TOTAL COOLING UNITS FOR THE SEASON……………43 DEPARTURE……..-1
TOTAL COOLING UNITS LAST SEASON TO DATE……….56 DEPARTURE…….-13
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)………..22 ENE @ 09:30 A.M.
VECTOR #1 (1-Sec)……….21 ENE @ 09:29 A.M.
VECTOR #2 (1-Sec)……….23 ENE @ 10:00 A.M.
DAVIS #1……………….22 E @ 09:30 A.M.
DAVIS #2 ………………21 E @ 10:00 A.M.
RMY #1 (Instantaneous)…..22 ENE @ 09:30 A.M.
RMY #2 (Instantaneous)…..22 ENE @ 10:00 A.M.
MERLIN…………………20 E
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 ENE @ 09:32 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 11:49 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 09:45 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 E @ 10:05 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 E @ 09:45 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 E @ 09:28 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ENE @ 09:45 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.1 ENE [218 total miles]
VECTOR #1……………….9.0
VECTOR #2……………….9.6
DAVIS #1………………..9.5 ENE
DAVIS #2………………..9.6 ENE
RMY #1………………….9.1 ENE
RMY #2………………….9.5 NE
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…………..0.96 DEPARTURE…..-0.33
TOTAL PRECIPITATION FOR THE YEAR (2025)…….22.70 DEPARTURE…..-1.19
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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 71/60/66/+2/0.95/…/.. 26 NE VEC1 26 NE RMY 25
6/8 67/55/61/-3/0.00/…/.. 22 ENE VEC1 21 ENE RMY 22
6/9 The low since midnight is 55F, the daily normal low is 56F.
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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 9
HIGH 94F IN 2008
LOW 40F IN 1980
PRECIP 2.08 INCHES IN 1931
PEAK GUST 67 MPH NW IN 1973
RECORDS FOR JUNE 10
HIGH 98F IN 2008
LOW 42F IN 1913, 1920
PRECIP 2.51 INCHES IN 1931
PEAK GUST 60e MPH NW IN 1941
TODAY’S REPORT PREPARED BY: MFD
