Tuesday, November 21, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, NOVEMBER 21, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0642E
SUNSET: 1618E
ANOTHER COLD DAY WITH INCREASING CLOUDINESS…
Clear skies this morning have given way to increasing cloud
cover, accompanied by a shift in wind direction. It has been
another cool day, as we are yet to escape the 30s!
This morning was the coldest of the season so far, with a
low of 22F right around the time of the 7am observation! Since
then, the temperature has risen into the upper 30s. The dew point
has also been on the rise, going from the mid teens to the mid 20s.
Winds have been on the light side today, with an average so far
around only 8mph. The peak gust thus far is only 15mph, occurring
around 2:30am and again a bit after 11am.
Visibility has been on the decline today, beginning the morning
with a perfect view of 90 miles and dropping to 60 miles by the
early afternoon.
The maximum temperature so far today is 39F, which is 9 degrees
below the normal high of 48F. The minimum temperature since
midnight is 22F, which is 10 degrees below the normal low of 32F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant offshore NE-SSW,
few cirrus all quadrants
Temperature: 22F; Dew Point: 16F; Relative Humidity: 72%
Wind: N @ 9 kts
Sea-level pressure: 1035.7 mb; 30.58 in. Hg: falling unsteadily
Visibility: 90 miles
6-hr Max temp: 25F
6-hr Min temp: 22F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 90 357/22/16/3609/058/ FEW SC DSNT OFFSHR NE-SSW
FEW CI ALQDS/ 8/501 57001 10025 20022
10 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant NE-SSW,
few cirrostratus distant WSW-W, thin smoke layer all quadrants
Temperature: 35F; Dew Point: 22F; Relative Humidity: 59%
Wind: NE @ 2 kts, wind light and variable
Sea-level pressure: 1035.9 mb; 30.59 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 -SCT 70 359/35/22/0502/059/ FEW SC DSNT NE-SSW
FEW CS DSNT WSW-W THN K LYR ALQDS WND L/V/ 8/505 50002
1 P.M.
Weather: Broken stratocumulus, overcast cirrostratus,
few breaks in overcast distant NNE-ESE, higher clouds visible
Temperature: 38F; Dew Point: 26F; Relative Humidity: 60%
Wind: SSE @ 4 kts, wind light
Sea-level pressure: 1034.2 mb; 30.54 in. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 39F
6-hr Min temp: 22F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E35 BKN 200 OVC 60 342/38/26/1504/054/ FEW BINOVC DSNT NNE-ESE
HIER CLDS VSBL DSNT NNE-ESE SUN DMLY VSBL WND LGT/ 8/507 56017 10039 20022
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SUMMARY FOR MONDAY, NOVEMBER 20, 2023
TEMPERATURE (DEGREES F)
MAX…….38 NORMAL…..49
MIN…….25 NORMAL…..32
MEAN……32 NORMAL…..40
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-8
TOTAL DEPARTURE FOR THE MONTH…………………-19 [-1.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………33 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………..446 DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE SEASON………….796 DEPARTURE……-144
TOTAL HEATING UNITS LAST SEASON TO DATE……..728 DEPARTURE…….+68
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)……….E29 NNW @ 09:03 A.M.
VECTOR #1 (1-Sec)……….32 NNW @ 09:03 A.M.
VECTOR #2 (1-Sec)……….34 NNW @ 09:01 A.M.
DAVIS #1……………….28 NW @ 09:22 A.M.
DAVIS #2 ………………30 NNW @ 09:01 A.M.
RMY #1 (Instantaneous)…..33 NNW @ 09:03 A.M.
RMY #2 (Instantaneous)…..34 NNW @ 09:01 A.M.
MERLIN…………………27 NW
RICHARDS (C5C) (Inst)……30 @ 09:28 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 NNW @ 09:30 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 09:28 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 09:24 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NNW @ 09:28 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 NNW @ 09:25 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 NNW @ 09:28 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 NNW @ 09:28 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 @ 09:28 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.3 NNW [247 total miles]
VECTOR #1……………..10.3
VECTOR #2……………..10.6
DAVIS #1………………10.4 NWW
DAVIS #2………………10.4 N
RMY #1………………..10.6 NNW
RMY #2………………..10.4 NNW
RICHARDS (C5C)…………10.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.37 DEPARTURE…..-2.46
TOTAL PRECIPITATION FOR THE YEAR…………..49.56 DEPARTURE…..+2.57
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-0.8
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-1.5
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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 42/31/37/-10/0.01/T/056/09 23 ENE VEC1 21 ENE RMY 23
11/2 45/28/37/-10/0.00/0.0/618/100 23 NNW VEC1 23 NNW RMY 22
11/3 55/36/46/0/0.00/0.0/541/88 32 SW VEC1 33 SSW RMY 33
11/4 59/44/52/+6/0.00/0.0/049/08 32 SW VEC1 31 SW RMY 32
11/5 61/42/52/+6/0.00/0.0/360/59 24 NNW VEC1 27 NNW RMY 27
11/6 50/40/45/+/0.00/0.0/067/11 28 S VEC1 27 S RMY 25
11/7 65/46/56/+11/0.05/0.0/272/45 38 WNW VEC1 37 WNW RMY 37
11/8 48/33/41/-4/0.00/0.0/440/73 36 NNW VEC1 38 NNW RMY 39
11/9 42/32/37/+7/0.11/T/000/00 20 WNW VEC1 20 WNW RMY 20
11/10 49/38/44/0/0.00/0.0/024/04 23 W VEC1 23 W RMY 22
11/11 49/30/40/-3/0.00/0.0/590/99 29 NW VEC1 26 NW RMY 30
11/12 41/27/34/-9/0.00/0.0/475/80 20 N VEC1 19 N RMY 19
11/13 44/24/34/-9/T/T/456/77 20 NNW VEC1 20 N RMY 19
11/14 47/31/39/-3/0.00/0.0/342/58 29 NW VEC1 29 NW RMY 29
11/15 50/30/40/-2/0.00/0.0/475/81 30 SW VEC1 30 SW RMY 31
11/16 62/40/51/+9/0.00/0.0/…/.. 30 WSW VEC1 31 WSW RMY 31
11/17 64/43/54/+13/0.00/0.0/…/.. 35 SSW VEC1 36 SSW RMY 37
11/18 56/30/43/+2/0.20/0.0/…/.. 35 NW VEC1 35 NW RMY 37
11/19 50/29/40/-1/0.00/0.0/…/.. 38 WNW VEC1 38 WNW RMY 39
11/20 38/25/32/-8/0.00/0.0/…/.. 29 NNW VEC1 32 NNW RMY 33
11/21 The low since midnight is 22F, the daily normal low is 32F
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NOVEMBER DAILY RECORDS TO DATE
11/1 TIED RECORD FOR SNOWFALL WITH A TRACE, TIED WITH 1906, 1951
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR NOVEMBER 22
HIGH 70 IN 1931
LOW 9 IN 2018
PRECIP 1.78 INS IN 2005
SNOWFALL 9.0 INS IN 1971
PEAK GUST 70e SE IN 1945
TODAY’S REPORT PREPARED BY: Joshua Polen/Matt Douglas
