Tuesday, September 5, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, SEPTEMBER 5, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0513E
SUNSET: 1812E
WELL ABOVE NORMAL WARMTH AND VERY HUMID CONDITIONS TODAY…
Yet another day with mainly sunny skies, but it is quite warm
and humid today with temperatures pushing into the mid and
upper 80s and the dew point pushing into the low 70s. This is
definitely making for uncomfortable air out there today.
To make matters worse, there really isn’t much air movement
either, thus not even remote relief from the stuffiness. The
wind has been rather light with an average speed of only
around 7mph. The highest gust so far today is around 16mph.
Visibility has been limited to around 15-20 miles all day due
to haziness.
The maximum temperature so far today has been 86F, which is
9 degrees above the normal high of 77F. The minimum temperature
since midnight is 68F, which is 9 degrees above the normal low
of 59F.
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Today’s Observations:
7 A.M.
Weather: Thin broken cirrus
Temperature: 71F; Dew Point: 68F; Relative Humidity: 90%
Wind: N @ 7 kts
Sea-level pressure: 1014.0 mb; 29.94 in. Hg: rising unsteadily
Visibility: 15 miles, thin fog
6-hr Max temp: 71F
6-hr Min temp: 68F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 -BKN 15 140/71/68/3507/994/ THN F ALQDS/
8/001 52010 10071 20068
10 A.M.
Weather: Thin broken cirrus
Temperature: 80F; Dew Point: 71F; Relative Humidity: 73%
Wind: NE @ 8 kts
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: rising, then steady
Visibility: 15 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E250 -BKN 15 146/80/71/0408/996/ HAZY/ 8/001 51006
1 P.M.
Weather: Thin broken cirrus, few cumulus SE-SW-NW-NNE
Temperature: 82F; Dew Point: 72F; Relative Humidity: 72%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1014.0 mb; 29.94 in. Hg: falling steadily
Visibility: 20 miles, hazy
6-hr Max temp: 86F
6-hr Min temp: 71F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 -BKN 20 140/82/72/0605/994/ FEW CU SE-SW-NW-NNE
HAZY WND LGT/ 8/201 57006 10086 20071
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SUMMARY FOR MONDAY, SEPTEMBER 4, 2023
TEMPERATURE (DEGREES F)
MAX…….85 NORMAL…..77
MIN…….68 NORMAL…..59
MEAN……77 NORMAL…..68
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+9
TOTAL DEPARTURE FOR THE MONTH………………….+7 [+1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….2 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON……………3 DEPARTURE…….-19
TOTAL HEATING UNITS LAST SEASON TO DATE……….2 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………12 DEPARTURE……..+8
TOTAL COOLING UNITS FOR THE MONTH……………23 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….593 DEPARTURE…….-21
TOTAL COOLING UNITS LAST SEASON TO DATE……..854 DEPARTURE……-261
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)……….E17 NW @ 12:29 A.M.
VECTOR #1 (1-Sec)……….16 NW @ 12:29 A.M.
VECTOR #2 (1-Sec)……….17 NW @ 12:46 A.M.
DAVIS #1……………….16 WNW @ 12:29 A.M.
DAVIS #2 ………………16 NW @ 12:29 A.M.
RMY #1 (Instantaneous)…..16 NW @ 12:29 A.M.
RMY #2 (Instantaneous)…..17 NW @ 12:46 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……16 @ 12:43 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………11 NW @ 12:31 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..11 @ 12:30 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 12:30 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 NW @ 12:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 NW @ 12:30 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 NW @ 12:30 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..12 NW @ 12:30 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12 @ 12:30 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..6.0 NNE [144 total miles]
VECTOR #1………………6.7
VECTOR #2………………7.1
DAVIS #1……………….6.5 ENE
DAVIS #2……………….6.7 ENE
RMY #1…………………6.7 NE
RMY #2…………………7.0 ENE
RICHARDS (C5C)………….7.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.46
TOTAL PRECIPITATION FOR THE YEAR…………..40.45 DEPARTURE…..+5.38
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 73/52/63/-6/0.00/…/.. 23 SSW VEC1 22 SSW RMY 21
9/2 79/56/68/-1/0.00/…/.. 25 SW VEC1 24 SW RMY 26
9/3 85/61/73/+5/T/…/.. 21 SW VEC1 21 SW RMY 21
9/4 85/68/77/+9/0.00/…/.. 17 NW VEC1 16 NW RMY 16
9/5 The low since midnight is 68F, the daily normal low is 59F
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 5
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994
RECORDS FOR SEPTEMBER 6
HIGH 92F IN 1900, 2018
LOW 39F IN 1888
PRECIP 3.19 INCHES IN 1890
PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)
TODAY’S REPORT PREPARED BY: Matt Douglas
