Thursday, December 16, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, DECEMBER 16, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0707E
SUNSET: 1611E
THIS IS DECEMBER…. RIGHT?
Today we observed overcast skies with some breaks in the early afternoon
following some light rainfall this morning. The total was 0.21 inches, and
the rain ended shortly after the 7 A.M. observation. The maximum visibility
was 75 miles at the 1 P.M. observation despite reduced visibility this morning.
Wind was significant and southwesterly, with an average speed of
15 mph and frequent gusts above 20 mph.
The high so far today is 55F, which is 15 degrees above the normal
max of 40F. The low since midnight is 42F, which 17 degrees above
the normal low of 25F.
These temperatures are normal for early November, just saying.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast nimbostratus, light rain
Temperature: 52F; Dew Point: 50F; Relative Humidity: 64%
Wind: SW @ 13G21 kts
Sea-level pressure: 1019.3 mb; 29.41 in. Hg: falling, then more rapidly
Visibility: 7 miles, thin fog
6-hr Max temp: 53F
6-hr Min temp: 38F
24-hr Precip: Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E65 BKN 100 OVC 7R- 193/52/50/2213G21/941/ THN F ALQDS
PK WND 2227/16/ 8/52/ 58012 6017/ 70021 10053 20038
10 A.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 53F; Dew Point: 48F; Relative Humidity: 84%
Wind: SSW @ 15G21 kts
Sea-level pressure: 1017.6 mb; 29.36 in Hg; falling then more
slowly
Visibility: 25 miles, hazy
3-hr Precip: Trace
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E65 BKN 100 OVC 25 176/53/48/2215G21/936/ HAZY/ 8/52/
56017 600//
1 P.M.
Weather: Broken altocumulus and overcast thin cirrostratus
Temperature: 55F, Dew point: 43F; Relative Humidity: 64%
Wind: SSW @ 15G24 kts
Sea-level pressure: 1013.5 mb; 29.24 in Hg; falling, then more
rapidly
Visibility: 75 miles
6-hr Max temp: 55F
6-hr Min temp: 52F
6-hr Precip: Trace
6-hr Snowfall: 0.0 ins.
Snow Depth: 0.0 ins.
BHO SA 1755 E110 BKN 200 -OVC 75 135/55/43/2015G24/924/ 8/057
58041 600// 10055 20052
SUMMARY FOR WEDNESDAY, DECEMBER 15, 2021
TEMPERATURE (DEGREES F)
MAX…….42 NORMAL…..40
MIN…….28 NORMAL…..25
MEAN……35 NORMAL…..33
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2
TOTAL DEPARTURE FOR THE MONTH………………………+61 [+3.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………30 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..392 DEPARTURE…….-62
TOTAL HEATING UNITS FOR THE SEASON…………1399 DEPARTURE……-259
TOTAL HEATING UNITS LAST SEASON TO DATE…….1394 DEPARTURE…… +5
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….35 SSE @ 11:59 P.M.
AEROVANE……………….35 SSE @ 10:27 P.M.
VECTOR #2 (Instantaneous)..38 @ 10:27 P.M.
DAVIS #2 ………………42 S @ 11:04 P.M.
RMY #2 (Instantaneous)…..38 SSE @ 10:27 P.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………29 SSE @ 11:46 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 @ 11:46 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S @ 11:04 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 SSE @ 11:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.6 SSE [254 total miles]
VECTOR #2…………….11.0
DAVIS #2……………..10.5 SSE
RMY #2……………….11.1 SSE
RMY #1…………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.21 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE MONTH………….1.04 DEPARTURE…..-1.64
TOTAL PRECIPITATION FOR THE YEAR………….57.81 DEPARTURE…..+6.92
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH……………….1.2 DEPARTURE……-3.7
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……2.2 DEPARTURE……-5.2
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
12/01 44/30/37/0.00/0.0/…/.. 35 W AERO 35 W RMY 34
12/02 58/35/47/10/T/0.0/…/.. 56 WNW AERO 59 WNW RMY 62 TSTM
12/03 41/28/35/-1/0.00/0.0/…/.. 46 NW AERO 44 NW RMY 46
12/04 39/25/32/-4/0.00/0.0/…/.. 25 SW AERO 23 SW RMY 26
12/05 45/32/39/+3/0.00/0.0/…/.. 25 SE AERO 25 SE RMY 25
12/06 59/37/48/+13/0.34/0.0/…/.. 59 WNW AERO 59 NW RMY 60
12/07 40/29/35/0/T/0.0/…/… 47 WNW AERO 36 WNW RMY 48
12/08 34/25/30/-5/0.05/0.6/…/.. 26 NNE AERO 25 NE RMY 26
12/09 35/20/28/-6/0.05/0.6/…/.. 32 NW AERO 30 NW RMY 33
12/10 43/27/35/+1/0.00/0.0/…/.. 21 SE AERO 20 SE RMY 21
12/11 62/37/50/+16/0.34/0.0/…/.. 57 SSW AERO 59 SSW RMY 58
12/12 58/36/47/+13/0.05/0.0/…/.. 55 WNW AERO 55 WNW RMY 58
12/13 50/35/43/+10/0.00/0.0/…/.. 32 WSW AERO 33 WSW RMY 33
12/14 50/33/42/+9/0.00/0.0/…/.. 31 WSW AERO 30 WSW RMY 32
12/15 42/28/35/+2/T/0.0/…/.. 35 SSE AERO 35 SSE RMY 36
12/16 The low since midnight is 42F, the daily normal low is 25F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 16
HIGH 61 IN 1971
LOW -2 IN 1930
PRECIP 1.67 INS. IN 1960
SNOW 8.5 INS. IN 2007
WIND 73 MPH SSE IN 1982
RECORDS FOR DECEMBER 17
HIGH 63 IN 2000
LOW -9 IN 1942
PRECIP 3.03 INS. IN 1888
SNOWFALL 15.1 INS. IN 2020
PEAK GUST 78 MPH SSE IN 2000
TODAY’S REPORT PREPARED BY: Benjamin Turner
