Wednesday, September 4, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, SEPTEMBER 4, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0513E
SUNSET: 1812E
ABSOLUTELY BEAUTIFUL EARLY SEPTEMBER WEATHER BEING OBSERVED….
High pressure is dominating our weather today giving us yet
another spectacular weather day. Plenty of bright sunshine
under clear skies has been the theme. Only a few diurnal cumulus
clouds have popped up early this afternoon.
Speaking of high pressure, the barometer reading is pretty high
for this early in the season. We’ve observed sea-level pressure
over 30.40 in/hg today, even nearing 30.50 in/hg late this
morning.
Temperatures are a bit warmer than yesterday, and close to
seasonal levels for the date. Readings have reached the upper 70s
early this afternoon. The dew point remains within very comfortable
levels with values in the upper 40s to lower 50s.
The wind has been mainly on the light side today, and rather
variable in direction as well. It has attempted to pick up a bit
in the last hour or so, but the overall average speed for the day
so far is only around 7mph. The peak gust thus far is 17mph, which
occurred during the 1pm observation period.
Visibility has been excellent once again today, holding at around
60-70 miles all day!
The maximum temperature so far today is 79F, which is 2 degrees
above the normal high of 77F. The minimum temperature since
midnight is 56F, which is 3 degrees below the normal low of 59F.
——————————
Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant NNE-ENE
Temperature: 62F; Dew Point: 50F; Relative Humidity: 63%
Wind: N @ 7 kts
Sea-level pressure: 1031.2 mb; 30.45 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 62F
6-hr Min temp: 56F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 312/62/50/0107/045/ FEW CI DSNT NNE-ENE/ 8/001 53013
10062 20056
10 A.M.
Weather: Clear
Temperature: 75F; Dew Point: 47F; Relative Humidity: 38%
Wind: ENE @ 4 kts, wind light and variable
Sea-level pressure: 1031.9 mb; 30.47 in. Hg: rising, then steady
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 319/75/47/0704/047/ WND L/V/ 8/000 51007
1 P.M.
Weather: Clear, few small cumulus all quadrants
Temperature: 78F; Dew Point: 52F; Relative Humidity: 40%
Wind: SSE @ 7G15 kts, wind ESE variable SSW
Sea-level pressure: 1031.6 mb; 30.46 in. Hg: falling, then steady
Visibility: 60 miles
6-hr Max temp: 79F
6-hr Min temp: 62F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 60 316/78/52/1607G15/046/ FEW SML CU ALQDS WND 12V20/
8/100 56003 10079 20062
——————————
SUMMARY FOR TUESDAY, SEPTEMBER 3, 2024
TEMPERATURE (DEGREES F)
MAX…….74 NORMAL…..77
MIN…….49 NORMAL…..60
MEAN……62 NORMAL…..68
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-6
TOTAL DEPARTURE FOR THE MONTH…………………….
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….3 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………….3 DEPARTURE………0
TOTAL HEATING UNITS FOR THE SEASON…………..14 DEPARTURE……..-7
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+11
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH……………13 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….707 DEPARTURE…….+97
TOTAL COOLING UNITS LAST SEASON TO DATE……..581 DEPARTURE……+126
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)……….E23 NW @ 10:54 A.M.
VECTOR #1 (1-Sec)……….23 NNW @ 09:57 A.M.
VECTOR #2 (1-Sec)……….24 NW @ 09:56 A.M.
DAVIS #1……………….21 NNW @ 09:57 A.M.
DAVIS #2 ………………20 NNW @ 09:56 A.M.
RMY #1 (Instantaneous)…..23 NNW @ 09:57 A.M.
RMY #2 (Instantaneous)…..24 NW @ 09:56 A.M.
MERLIN…………………21 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………..
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 09:58 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 09:57 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 NNW @ 12:35 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 N @ 09:57 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 NNW @ 12:34 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NNW @ 09:57 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.
VECTOR #1………………8.4
VECTOR #2………………8.7
DAVIS #1……………….8.5 NW
DAVIS #2……………….8.5 NNW
RMY #1…………………8.2 NW
RMY #2…………………8.6 NW
RICHARDS (C5C)…………OTS
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…..-0.34
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.21 DEPARTURE…..+6.26
——————————
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(
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 82/67/75/+6/T/…/.. 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/…/.. 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/…/.. 23 NW VEC1 23 NNW RMY 23
9/4 The low since midnight is 56F, the daily normal low is 59F.
——————————
SEPTEMBER DAILY RECORDS TO DATE
NONE.
——————————
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 4
HIGH 90F IN 1953, 1973
LOW 46F IN 1987
PRECIP 3.22 INCHES IN 1922
PEAK GUST 47 MPH SE IN 1966
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
TODAY’S REPORT PREPARED BY: Matt Douglas
