Wednesday, June 4, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JUNE 4, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0409E
SUNSET: 1917E
FILTERED SUNSHINE THROUGH THIN CIRRUS CLOUDS AND SMOKE….
An upper level ridge is building into the region with much warmer
and more humid air advecting into the area with it. Today has
featured very filtered sunshine as both some thin cirrus clouds
and a smoke layer from the wildfires in central Canada are passing
over the region.
Temperatures have warmed quite a bit today, reaching the mid 80s
by early this afternoon. The dew point is also on the rise,
increasing from the upper 40s early this morning to the mid 50s by
early this afternoon.
The wind was fairly steady through the morning at around 12mph, but
has been increasing a bit early this afternoon with the last hour
averaging around 12mph. It has been mainly out of the west-southwest
to southwest today, helping to advect that warmer, more humid air
into the area. The peak gust occurred around 11:45am this morning
with a value of 26mph.
Visibility has been limited today due to haziness. The view has
decreased a bit from 40 miles early this morning to only 30 miles
by early this afternoon.
The maximum temperature for today is 84F degrees, which is 12 degrees
above the normal high of 72F. The minimum temperature since midnight
is 58F degrees, which is 4 degrees above the normal low of 54F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Thin broken cirrus, smoke layer aloft all quadrants
Temperature: 63F; Dew Point: 48F; Relative Humidity: 58%
Wind: SW @ 9 kts
Sea-level pressure: 1023.9 mb; 30.24 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 63F
6-hr Min temp: 58F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 -BKN 40 239/63/48/2309/024/ K LYR ALF ALQDS HAZY/
8/001 51011 10063 20058
10 A.M.
Weather: Thin broken cirrus, smoke layer aloft all quadrants
Temperature: 75F; Dew Point: 55F; Relative Humidity: 49%
Wind: WSW @ 9 kts
Sea-level pressure: 1023.6 mb; 30.23 in. Hg: rising, then falling
Visibility: 35 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E250 -BKN 35 236/75/55/2509/023/ K LYR ALF ALQDS HAZY/
8/001 58003
1 P.M.
Weather: Thin scattered cirrus, smoke layer aloft all quadrants
Temperature: 83F Dew Point: 55F; Relative Humidity: 38%
Wind: SW @ 14G19 kts
Sea-level pressure: 1021.8 mb; 30.17 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 63F
6-hr Precip: 0.00 inches
BHO SA 1755 250 -SCT 30 218/83/55/2214G19/017/ K LYR ALF ALQDS HAZY/
8/001 58018 10084 20063
————————————————————–
SUMMARY FOR TUESDAY, JUNE 3, 2025
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..71
MIN…….50 NORMAL…..54
MEAN……65 NORMAL…..62
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+3
TOTAL DEPARTURE FOR THE MONTH……………………….-7 [-2.5 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……..+2
TOTAL HEATING UNITS FOR THE SEASON………….5631 DEPARTURE……-527
TOTAL HEATING UNITS LAST SEASON TO DATE……..5379 DEPARTURE……+252
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH……………..0 DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE SEASON……………17 DEPARTURE…….-16
TOTAL COOLING UNITS LAST SEASON TO DATE……….44 DEPARTURE…….-27
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)………..23 SSW @ 04:11 P.M.
VECTOR #1 (1-Sec)……….23 SSW @ 04:11 P.M.
VECTOR #2 (1-Sec)……….21 ESE @ 04:25 P.M.
DAVIS #1……………….23 SE @ 04:09 P.M.
DAVIS #2 ………………26 S @ 07:11 P.M.
RMY #1 (Instantaneous)…..21 ESE @ 04:23 P.M.
RMY #2 (Instantaneous)…..22 ESE @ 04:24 P.M.
MERLIN…………………24 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 SW @ 11:29 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 04:24 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 11:44 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 ESE @ 04:24 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S @ 08:17 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 ESE @ 04:24 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 SW @ 11:44 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.9 WNW [190 total miles]
VECTOR #1……………….8.6
VECTOR #2……………….8.9
DAVIS #1………………..8.4 W
DAVIS #2………………..8.5 W
RMY #1………………….8.4 W
RMY #2………………….8.8 W
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.01 DEPARTURE…..-0.46
TOTAL PRECIPITATION FOR THE YEAR (2025)…….21.75 DEPARTURE…..-1.32
————————————————————–
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/…/.. 40 W VEC1 40 W RMY 42
6/2 70/48/59/-3/T/…/.. 25 WNW VEC1 25 WSW RMY 26
6/3 79/50/65/+3/0.00/…/.. 23 SSW VEC1 23 SSW RMY 21
6/4 The low since midnight is 58F, the daily normal low is 54F.
————————————————————–
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 4
HIGH 99F IN 1919 [Record for month]
LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007
PEAK GUST 48 MPH SSE IN 1983
RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988
TODAY’S REPORT PREPARED BY: MFD
