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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, JUNE 2, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0410E
SUNSET: 1915E
A SUMMERY FEEL TODAY WITH NEAR RECORD HEAT EARLY THIS AFTERNOON….
There are some mysterious white puffy formations out there
today in the sky. I believe the ancient observers used to
call them clouds! Skies have been mostly clear today, however
cumulus, and even cumulonimbus clouds have formed today thanks
to the abundant surface heating taking place. Thunderstorms have
been reported across parts of Worcester county, bringing with
them some much needed rainfall. Hopefully more communities will
be able to benefit from some rainfall this evening. Fingers
crossed.
Temperatures today have warmed easily into the upper 80s to
low 90s across the area. Here on the hill, officially we
made it to 90F for the first time this season. The record
high for today is 91F set in 1895. We have a good shot of at
least tying this record. Stay tuned.
In addition to the heat, humidity levels have been a bit
elevated as well with the dew point reaching the mid 60s for
a time late this morning, thus giving us a humid feel as well.
The wind has remained light today, with an average speed of
around 7mph. Winds have been variable throughout most of the
day, but has been attempting to go more toward a very feeble
seabreeze. So far, it’s having no impact on the temperature.
The visibility has been limited once again today due to general
haziness. Visibility started out this morning around 12 miles,
and has only improved to around 20 miles by early this afternoon.
The maximum temperature so far today is 90F, which is 19F
degrees above the normal high of 71F. The minimum temperature
so far since midnight is 63F, which is 10 degrees above the
normal low of 53F.
The month of May ended up being exceptionally sunny here at
Blue Hill. As a matter of fact, it was the sunniest May ever
recorded. It was also the 4th sunniest of any month here at
Blue Hill since 1886. Here is the updated ranking as compiled
by our Chief Scientist, Mike Iacono.
BHO Highest May Bright Sunshine, hours (1886-2023):
1) 329.9 in 2023 [75%] 2) 318.9 in 1964 [73%] 3) 304.4 in 1977 [70%] 4) 295.8 in 1955 [68%] 5) 288.4 in 1991 [66%]
BHO Highest Monthly Bright Sunshine, hours (1886-2023):
1) 336.1 in June 1971 [76%] 2) 335.5 in June 1908 [76%] 3) 331.6 in July 1952 [75%] 4) 329.9 in May 2023 [75%] 5) 327.4 in June 1953 [74%] 6) 326.4 in July 1966 [73%] 7) 322.6 in June 1949 [73%] 322.6 in July 2022 [73%]
————————————————————–
PRELIMINARY STATS FOR MAY 2023
TEMPERATURE, Deg. F
Avg. Max. 69.4 [+2.6]
Avg. Min. 47.0 [-1.2]
Mean 58.2 [+0.7]
24-hour corrected mean: 57.7
Max. for month: 86F on the 28th
Min. for month: 34F on the 18th
HEATING DEGREE DAYS
Total heating units: 225 [-033]
Total for the season: 5196 [-949]
Total for last season: 5566
COOLING DEGREE DAYS
Total cooling units: 22 [-003]
Total for the season: 31 [+003]
Total for last season: 60
PRECIPITATION, Inches
Total: 2.55 [-1.27]
Greatest in 24 hrs: 2.06 on the 20th-21st
SNOWFALL, Inches
Total: 0.0 [0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed: 11.3 mph
Prevailing wind direction: South-southwest [12%]
Peak gust and direction: 44 SSE on the 1st
SUNSHINE:
Campbell-Stokes card minutes: 19794 of a possible 26226, or 75%
Astronomical total minutes: 20482 of a possible 27167, or 75%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus/castellanus distant WNW-N-E
Temperature: 71F; Dew Point: 60F; Relative Humidity: 70%
Wind: N @ 2 kts, wind light
Sea-level pressure: 1014.1 mb; 29.95 in. Hg: steady, then rising
Visibility: 12 miles, hazy
6-hr Max temp: 71F
6-hr Min temp: 63F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 12 141/71/60/3502/995/ FEW AC/ACC DSNT WNW-N-E
HAZY WND LGT/ 8/080 53002 10071 20063
10 A.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 82F; Dew Point: 64F; Relative Humidity: 54%
Wind: Calm
Sea-level pressure: 1014.0 mb; 29.95 in. Hg: steady, then falling
Visibility: 12 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 12 140/82/64/0000/994/ FEW AC ALQDS HAZY
WND CALM/ 8/050 58001
1 P.M.
Weather: Clear, few cumulonimbus WNW-NW moving S, few cumulus
all quadrants
Temperature: 87F; Dew Point: 57F; Relative Humidity: 36%
Wind: ESE @ 4 kts, wind light
Sea-level pressure: 1012.3 mb; 29.89 in. Hg: falling, then more rapidly
Visibility: 20 miles, hazy
6-hr Max temp: 90F
6-hr Min temp: 71F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 20 123/87/57/1204/989/ FEW CB DSNT W-NW MOV S
FEW CU ALQDS HAZY WND LGT/ 8/300 58017 10090 20071
————————————————————–
SUMMARY FOR THURSDAY, JUNE 1, 2023
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..71
MIN…….56 NORMAL…..53
MEAN……72 NORMAL…..62
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+10
TOTAL DEPARTURE FOR THE MONTH………………..+10 [+9.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE SEASON…………5196 DEPARTURE……-953
TOTAL HEATING UNITS LAST SEASON TO DATE…….5566 DEPARTURE……-378
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….7 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………….7 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON…………..38 DEPARTURE……..+8
TOTAL COOLING UNITS LAST SEASON TO DATE………60 DEPARTURE…….-22
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E21 WSW @ 01:41 A.M.
VECTOR #1 (1-Sec)……….21 WSW @ 01:41 A.M.
VECTOR #2 (1-Sec)……….21 WSW @ 02:03 A.M.
DAVIS #1……………….21 SW @ 01:41 A.M.
DAVIS #2 ………………21 WSW @ 02:03 A.M.
RMY #1 (Instantaneous)…..21 SW @ 01:56 A.M.
RMY #2 (Instantaneous)…..22 WSW @ 01:56 A.M.
MERLIN…………………21 SW
RICHARDS (C5C) (Inst)……22 @ 01:51 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 SW @ 02:11 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 02:02 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 02:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 SW @ 02:02 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WSW @ 02:02 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SW @ 02:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 WSW @ 02:01 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 01:43 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.2 SSW [197 total miles]
VECTOR #1……………….8.8
VECTOR #2……………….9.0
DAVIS #1………………..8.3 SSW
DAVIS #2………………..8.9 SW
RMY #1………………….8.6 SSW
RMY #2………………….9.1 SW
RICHARDS (C5C)…………..8.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE YEAR…………..20.75 DEPARTURE…..-2.01
————————————————————–
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 63/45/54/+1/0.04/0.0/540/64 44 SSE VEC1 46 SSE RMY 48
5/2 57/43/50/-4/0.22/0.0/144/17 33 S VEC1 34 S RMY 35 TSTM
5/3 55/42/49/-5/0.01/0.0/093/11 25 E VEC1 25 E RMY 25
5/4 45/40/43/-11/0.07/0.0/009/01 29 NE VEC1 29 NE RMY 29
5/5 59/43/51/-4/0.07/0.0/367/43 18 NE VEC1 19 NE RMY 19
5/6 74/43/59/+4/0.00/0.0/847/99 25 NW VEC1 26 NW RMY 26
5/7 78/52/65/+10/0.01/0.0/789/92 26 WNW VEC1 27 W RMY 28
5/8 74/49/62/+7/0.03/0.0/800/93 32 NW VEC1 33 NW RMY 35
5/9 60/45/53/-3/0.00/0.0/819/95 24 NE VEC1 25 NE RMY 25
5/10 72/51/62/+6/0.00/0.0/830/96 25 WSW VEC1 26 WSW RMY 26
5/11 81/53/67/+11/T/0.0/729/84 30 W VEC1 30 W RMY 30
5/12 84/57/71/+14/T/0.0/687/79 31 WNW VEC1 35 WNW RMY 34
5/13 81/58/70/+13/0/0.0/715/82 28 NNW VEC1 30 NNW RMY 35
5/14 66/47/57/0/0.00/0.0/822/94 28 NNW VEC1 29 NNW RMY 31
5/15 72/45/59/+2/0.00/0.0/675/77 33 W VEC1 35 W RMY 34
5/16 80/55/68/+10/0.00/0.0/500/57 38 SW VEC1 39 SW RMY 41
5/17 62/37/50/-8/0.00/0.0/836/95 36 NNW VEC1 37 NNW RMY 40
5/18 64/34/49/-9/0.00/0.0/847/96 26 SSW VEC1 28 SSW RMY 28
5/19 68/42/55/-3/0.00/0.0/751/85 36 SSW VEC1 36 SSW RMY 34
5/20 65/51/58/-1/1.97/0.0/018/02 38 S VEC1 39 S RMY 39
5/21 73/55/64/+5/0.09/0.0/533/60 29 SSW VEC1 30 SSW RMY 31
5/22 59/46/53/-6/0.00/0.0/782/88 36 ENE VEC1 38 ENE RMY 39
5/23 65/45/55/-4/0.00/0.0/802/90 17 SE VEC1 18 SE RMY 18
5/24 75/44/60/0/0.04/0.0/697/78 35 NW VEC1 36 NW RMY 38
5/25 67/47/57/-3/0.00/0.0/760/85 25 NNW VEC1 25 NNW RMY 26
5/26 70/44/57/-3/0.00/0.0/850/95 20 N VEC1 21 N RMY 22
5/27 80/48/64/+4/0.00/0.0/870/97 23 SSW VEC1 23 SSW RMY 23
5/28 86/56/71/+10/0.00/0.0/845/94 23 SW VEC1 24 SW RMY 25
5/29 65/48/57/-4/0.00/0.0/873/97 43 ENE VEC1 44 ENE RMY 45
5/30 71/46/59/-2/0.00/0.0/875/97 21 SSW VEC1 21 SSW RMY 21
5/31 80/45/63/+1/0.00/0.0/777/86 20 SSW VEC1 20 SSW RMY 20
DAILY RECORDS
05/18/2023: NEW RECORD LOW MINIMUM TEMPERATURE OF 34F,
THIS BEATS THE OLD RECORD OF 35F SET IN 2002
05/20/2023: NEW RECORD DAILY PRECIPITATION OF 1.97 INCHES,
THIS BEATS THE OLD RECORD OF 1.65 INCHES SET IN 1969
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 88/56/72/+10/0.00/…/.. 21 WSW VEC1 21 WSW RMY 21
6/2 The low since midnight is 63F, the daily normal low is 53F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 2
HIGH 91F IN 1895
LOW 41F IN 1907, 1929
PRECIP 2.36 INS IN 1982
SNOWFALL TRACE IN 1907 (ICE PELLETS)
PEAK GUST 63 MPH NW IN 2000
RECORDS FOR JUNE 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998
TODAY’S REPORT PREPARED BY: Matt Douglas
