Monday, September 9, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, SEPTEMBER 9, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0518E
SUNSET: 1803E
FALL-LIKE WEATHER CONTINUES UNDER A MIX OF SUN AND CLOUDS….
Yet another excellent weather day here in early September with a
mix of sun and clouds, temperatures that are near seasonal
levels, and comfortably dry air.
The temperature has reached the low 70s early this afternoon with
dew point values in the mid-upper 40s.
Winds have been a bit busy again today mainly out of the west.
The average speed for the day so far is around 12mph. Frequent
gusts over 20mph have been occuring, with a peak gust so far for
the day 30mph, which occurred just after 11am.
Visibility has once again been excellent with a view holding at
around 70 miles today.
The maximum temperature so far today is 74F, which is 1 degree
below the normal high of 75F. The minimum temperature since midnight
is 51F, which is 7 degrees below the normal low of 58F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus/castellanus distant WNW-N,
few cirrus distant ENE-SSW
Temperature: 55F; Dew Point: 46F; Relative Humidity: 71%
Wind: W @ 10G17 kts
Sea-level pressure: 1018.4 mb; 30.07 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 55F
6-hr Min temp: 51F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 184/55/46/2610G17/007/ FEW AC/ACC DSNT WNW-N
FEW CI DSNT ENE-SSW/ 8/081 53013 10055 20051
10 A.M.
Weather: Clear, few cumulus distant WSW-NNE and distant SE, few cirrus
all quadrants
Temperature: 67F; Dew Point: 47F; Relative Humidity: 47%
Wind: W @ 7G15 kts
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 181/67/47/2607G15/006/ FEW CU DSNT WSW-NNE AND
DSNT SE FEW CI AQLDS/ 8/201 58003
1 P.M.
Weather: Scattered cumulus, thin scattered cirrus
Temperature: 73F; Dew Point: 48F; Relative Humidity: 41%
Wind: W @ 12G21 kts
Sea-level pressure: 1016.4 mb; 30.01 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 74F
6-hr Min temp: 55F
6-hr Precip: 0.00 inches
BHO SA 1755 55 SCT 250 -SCT 70 164/73/48/2812G21/001/ 8/201 56017
10074 20055
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SUMMARY FOR SUNDAY, SEPTEMBER 8, 2024
TEMPERATURE (DEGREES F)
MAX…….70 NORMAL…..76
MIN…….50 NORMAL…..58
MEAN……60 NORMAL…..67
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-7
TOTAL DEPARTURE FOR THE MONTH…………………….-10 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….5 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………….8 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………..19 DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+16
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH……………22 DEPARTURE…….-11
TOTAL COOLING UNITS FOR THE SEASON………….716 DEPARTURE…….+87
TOTAL COOLING UNITS LAST SEASON TO DATE……..650 DEPARTURE…….+66
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)……….E35 W @ 03:24 P.M.
VECTOR #1 (1-Sec)……….35 W @ 03:25 P.M.
VECTOR #2 (1-Sec)……….31 W @ 03:18 P.M.
DAVIS #1……………….33 W @ 03:23 P.M.
DAVIS #2 ………………30 WNW @ 03:19 P.M.
RMY #1 (Instantaneous)…..34 W @ 03:23 P.M.
RMY #2 (Instantaneous)…..31 W @ 03:18 P.M.
MERLIN…………………33 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………25 WNW @ 01:51 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 @ 03:25 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 @ 03:20 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 W @ 03:25 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 W @ 03:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 W @ 03:25 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 W @ 03:20 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….12.7 WNW [304 total miles]
VECTOR #1……………..12.5
VECTOR #2……………..13.1
DAVIS #1………………13.1 W
DAVIS #2………………13.0 WNW
RMY #1………………..11.8 W
RMY #2………………..12.8 W
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.04 DEPARTURE…..-0.90
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.25 DEPARTURE…..+5.70
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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 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/…/.. 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/…/.. 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/…/.. 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/…/.. 35 W VEC1 35 W RMY 34
9/9 The low since midnight is 51F, the daily normal low is 58F.
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SEPTEMBER 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 SEPTEMBER 9
HIGH 92F IN 2015
LOW 41F IN 1938
PRECIP 1.97 INCHES IN 1969
PEAK GUST 52 MPH WNW IN 1969, NW IN 1978
RECORDS FOR SEPTEMBER 10
HIGH 90F IN 1931,1989
LOW 41F IN 1956
PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER)
PEAK GUST 48 MPH NW IN 1972
TODAY’S REPORT PREPARED BY: Matt Douglas
