Wednesday, November 20, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, NOVEMBER 20, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0642E
SUNSET: 1618E
PLENTY OF SUNSHINE THROUGH THE MORNING, CLOUDS STARTING TO MOVE IN
EARLY THIS AFTERNOON….
Mainly sunny skies are the theme today with a few clouds floating
by as an onshore flow begins to back some of the stratocumulus from
over the ocean into the area. The cloudiest conditions across coastal
areas from about the Cohasset/Scituate area then southwestward into
southeastern Massachusetts. Here at Blue Hill, only a few clouds are
dotting the sky so far.
Temperatures are running about the same as yesterday, although we had
a bit of a cooler start early this morning. Readings have reached the
low to mid 50s early this afternoon. This is still a good 5-7 degrees
above the expected high for today. The dew point has been gradually
rising from the low 30s early this morning into the low 40s by early
this afternoon. This is due to the onshore flow off the ocean.
Winds started the day out of the northwest and north-northwest, then
shifted to the east-northeast by the mid morning hours. Other than
some brief periods where the wind goes light, speeds have been
generally steady today averaging at around 9mph for the day so far.
The peak gust for the day so far is 20mph, which occurred at 10:51am
this morning.
Visibility has been decent today, starting at 60 miles early this
morning, then going to around 70 miles during the mid morning hours,
then back down to around 60 miles early this afternoon.
The maximum temperature for today is 52 degrees, which is 3 degrees
above the normal high of 49F. The minimum temperature since midnight
is 36F degrees, which is 4 degrees above the normal low of 32F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-ESE, few altocumulus
distant ESE-SW-NW, few cirrus overhead-ESE-SW-N, smoke plume E and WNW, and
distant N, thin smoke layer all quadrants below inversion
Temperature: 38F; Dew Point: 33F; Relative Humidity: 81%
Wind: N @ 9 kts
Sea-level pressure: 1009.8 mb; 29.82 in. Hg: steady, then rising
Visibility: 60 miles
6-hr Max temp: 38F
6-hr Min temp: 36F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 60 098/38/33/3509/982/ FEW SC OFFSHR DSNT NE-ESE
FEW AC DSNT ESE-SW-NW FEW CI OVHD-ESE-SW-N K PLUME E AND WNW AND
DSNT N THN K LYR ALQDS BLW INVRSN/ 8/551 53002 10038 20036
10 A.M.
Weather: Clear, few stratocumulus offshore distant NE-SE,
few altocumulus distant SE-W-NW, smoke plume E-ESE, smoke layer
distant N-NE
Temperature: 49F; Dew Point: 38F; Relative Humidity: 65%
Wind: ENE @ 7 kts
Sea-level pressure: 1010.7 mb; 29.85 in. Hg: rising, then steady
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 107/49/38/0607/985/ FEW SC OFFSHR DSNT NE-SE
FEW AC DSNT SE-W-NW K PLUME E-ESE K LYR DSNT N-NE/ 8/550 51009
1 P.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus distant
WSW-WNW, thin smoke layer all quadrants
Temperature: 52F; Dew Point: 41F; Relative Humidity: 65%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1008.9 mb; 29.79 in. Hg: falling unsteadily
Visibility: 60 miles
6-hr Max temp: 52F
6-hr Min temp: 38F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 60 089/52/41/0705/979/ FEW SC ALQDS FEW CI DSNT
WSW-WNW THN K LYR ALQDS WND LGT/ 8/501 57018 10052 20038
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SUMMARY FOR TUESDAY, NOVEMBER 19, 2024
TEMPERATURE (DEGREES F)
MAX…….56 NORMAL…..49
MIN…….39 NORMAL…..33
MEAN……48 NORMAL…..41
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+7
TOTAL DEPARTURE FOR THE MONTH……………………+102 [+5.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………17 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..306 DEPARTURE…….-97
TOTAL HEATING UNITS FOR THE SEASON………….679 DEPARTURE……-236
TOTAL HEATING UNITS LAST SEASON TO DATE……..763 DEPARTURE…….-84
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….5 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….768 DEPARTURE…….+91
TOTAL COOLING UNITS LAST SEASON TO DATE……..715 DEPARTURE…….+53
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)………..29 NW @ 10:52 A.M.
VECTOR #1 (1-Sec)……….29 NW @ 10:52 A.M.
VECTOR #2 (1-Sec)……….30 WNW @ 02:06 A.M.
DAVIS #1……………….28 NNW @ 10:49 A.M.
DAVIS #2 ………………27 WNW @ 02:06 A.M.
RMY #1 (Instantaneous)…..30 NW @ 10:52 A.M.
RMY #2 (Instantaneous)…..30 WNW @ 02:06 A.M.
MERLIN…………………27 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 NW @ 09:42 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 10:32 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 10:30 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NW @ 10:32 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 NNW @ 10:30 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 NW @ 10:32 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 NW @ 10:30 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.0 NW [287 total miles]
VECTOR #1………………11.9
VECTOR #2………………12.3
DAVIS #1……………….12.2 NW
DAVIS #2……………….12.0 NNW
RMY #1…………………11.7 NW
RMY #2…………………12.1 NW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..0.08 DEPARTURE…..-2.62
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.88 DEPARTURE…..-2.98
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….0.0 DEPARTURE……-1.4
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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
11/1 77/49/63/+16/0.00/0.0/347/56 36 WNW VEC1 36 WNW RMY 37
11/2 55/37/46/-1/0.00/0.0/228/37 21 N VEC1 23 N RMY 21
11/3 48/30/39/-7/0.00/0.0/595/97 20 NNW VEC1 21 NNW RMY 21
11/4 49/33/41/-5/0.00/0.0/061/10 20 SSE VEC1 21 SSE RMY 21
11/5 73/46/60/+15/0.00/0.0/505/83 35 SW VEC1 35 SW RMY 37
11/6 80/59/70/+25/0.00/0.0/558/92 39 WSW VEC1 39 WSW RMY 42
11/7 69/47/58/+13/0.00/0.0/519/86 37 WNW VEC1 35 WNW RMY 42
11/8 63/41/52/+7/0.00/0.0/572/95 42 WNW VEC1 42 WNW RMY 47
11/9 50/36/43/-1/0.00/0.0/599/100 40 NW VEC1 42 NW RMY 43
11/10 60/32/46/+2/T/0.0/388/65 29 WSW VEC1 29 SW RMY 31
11/11 66/50/58/+15/0.08/0.0/457/77 40 SW VEC1 42 SW RMY 43
11/12 54/33/44/+1/0.00/0.0/545/92 48 NNW VEC1 50 NNW RMY 56
11/13 43/28/36/-7/0.00/0.0/584/99 32 N VEC1 33 N RMY 31
11/14 42/27/35/-7/0.00/0.0/…/.. 22 NE VEC1 22 NE RMY 22
11/15 58/27/43/+1/0.00/0.0/…/.. 28 NW VEC1 28 NW RMY 30
11/16 60/38/49/+7/0.00/0.0/…/.. 33 NNW VEC1 35 NNW RMY 35
11/17 62/40/51/+10/0.00/0.0/…/.. 26 NW VEC1 26 NW RMY 26
11/18 61/43/52/+11/T/0.0/…/.. 29 NW VEC1 28 NW RMY 31
11/19 56/39/48/+7/0.00/0.0/…/.. 29 NW VEC1 29 NW RMY 30
11/20 The low since midnight is 36F, the daily normal low is 32F.
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NOVEMBER DAILY RECORDS TO DATE
11/1 RECORD HIGH TEMPERATURE OF 77F, OLD RECORD WAS 75F IN 2003.
11/6 RECORD HIGH TEMPERATURE OF 80F, OLD RECORD WAS 74F IN 2022.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR NOVEMBER 20
HIGH 72 IN 1953
LOW 9 IN 1894
PRECIP 2.78 INS IN 1988
SNOWFALL 3.0 INS IN 1897
PEAK GUST 73e S IN 1950
RECORDS FOR NOVEMBER 21
HIGH 69 IN 1931
LOW 10 IN 1888
PRECIP 3.41 INCHES IN 1950
SNOWFALL 4.0 INS IN 1929
PEAK GUST 69 NW IN 1989
TODAY’S REPORT PREPARED BY: Matt Douglas
