Saturday, December 4, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, DECEMBER 4, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0657E
SUNSET: 1612E
MOSTLY CLOUDY WITH GREAT VISIBILITY AND SEASONABLE TEMPERATURES….
We observed a great visibility of 80 miles for most of the day today,
under mostly cloudy skies. Ponkapoag Lake had 2/10ths ice cover this
morning, but the ice was gone by the 1 P.M. observation.
Wind is westerly at 10 mph on average, with a max of 20 mph.
The high so far today is 38F, which is 6 degrees below the normal
max of 44F. The low since midnight is 25F, 3 degrees below the
normal low of 28F.
————————————————————–
PRELIMINARY STATS FOR NOVEMBER 2021
TEMPERATURE, Deg. F
Avg. Max. 50.8 [+0.7]
Avg. Min. 33.6 [-0.2]
Mean 42.2 [+0.2]
24-hour corrected mean: 41.6
Max. for month: 69F on the 18th
Min. for month: 21F on the 30th
HEATING DEGREE DAYS
Total heating units: 680 [-12]
Total for the season: 1007 [-197]
Total for last season: 1204
PRECIPITATION, Inches
Total: 1.92 [-2.39]
Greatest in 24 hrs: 1.00 inch on the 12th
SNOWFALL, Inches
Total: 1.0 ins. [-0.8]
Greatest in 24 hrs: 1.0 ins. from the 26th-27th
WIND, mph
Avg. uncorrected wind speed: 11.2 mph
Avg. corrected wind speed: 11.7 mph
Prevailing wind direction: WNW [16%]
Peak gust and direction: 72 SSE on the 12th
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 27F; Dew Point: 18F; Relative Humidity: 70%
Wind: W @ 8G15 kts
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: rising, then more
rapidly
Visibility: 70 miles
6-hr Max temp: 28F
6-hr Min temp: 25F
24-hr Precip: 0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 120 SCT 250 BKN 70 187/27/18/2708G15/008/ 8/051 53004
10028 20025
10 A.M.
Weather: Scattered altocumulus, broken cirrostratus
Temperature: 32F; Dew Point: 22F; Relative Humidity: 66%
Wind: W @ 7 kts
Sea-level pressure: 1017.1 mb; 30.03 in Hg; rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 120 SCT 250 BKN 80 171/32/22/2707/003/ 8/079 51016
1 P.M.
Weather: Broken altocumulus and cirrus, breaks in overcast NE-E
Temperature: 36F, Dew point: 25F; Relative Humidity: 63%
Wind: W @ 8G15 kts
Sea-level pressure: 1018.3 mb; 30.07 in Hg; falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 38F
6-hr Min temp: 26F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 70 BKN 230 OVC 80 183/36/25/2708G15/007/ BINOVC NE-E/ 8/051
58020 10038 20026
SUMMARY FOR FRIDAY, DECEMBER 3, 2021
TEMPERATURE (DEGREES F)
MAX…….41 NORMAL…..44
MIN…….28 NORMAL…..29
MEAN……35 NORMAL…..36
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -1
TOTAL DEPARTURE FOR THE MONTH……………………… +9 [+2.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………30 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH……………76 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE SEASON…………1082 DEPARTURE……-206
TOTAL HEATING UNITS LAST SEASON TO DATE…….1040 DEPARTURE…… +43
PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….46 NW @ 8:46 A.M.
AEROVANE……………….44 NW @ 8:46 A.M.
VECTOR #2 (Instantaneous)..52 @ 8:26 A.M.
DAVIS #2 ………………43 NW @ 8:47 A.M.
RMY #2 (Instantaneous)…..49 NW @ 8:26 A.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………………30 NW @ 8:47 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..31 @ 8:47 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 NW @ 8:47 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 NW @ 8:47 A.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…….17.4 WNW [417 total miles]
VECTOR #2……………..17.9
DAVIS #2………………17.9 WNW
RMY #2………………..17.7 WNW
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…….0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH………….0.00 DEPARTURE…..-0.52
TOTAL PRECIPITATION FOR THE YEAR………….56.77 DEPARTURE…..+8.04
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH……………….0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……1.0 DEPARTURE……-2.2
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
11/01 59/41/50/+3/0.00/0.0/594/96 38 WNW AERO 39 WNW RMY 39
11/02 56/40/48/+1/0.00/0.0/247/40 25 SW AERO 25 SW RMY 26
11/03 51/35/43/-3/0.00/0.0/572/93 28 W AERO 25 W RMY 27
11/04 49/31/40/-6/0.00/0.0/446/73 17 NNE AERO 17 NNW RMY 16
11/05 49/32/41/-5/0.00/0.0/591/97 25 NW AERO 24 NW RMY 24
11/06 51/34/43/-2/0.00/0.0/595/98 18 SSW AERO 17 SW RMY 19
11/07 55/37/46/+1/0.00/0.0/514/85 17 W AERO 17 W RMY 16
11/08 60/38/49/+4/0.00/0.0/578/96 20 N AERO 18 N RMY 19
11/09 69/45/57/+13/0.00/0.0/582/97 21 W AERO 21 W RMY 22
11/10 60/44/52/+8/0.00/0.0/389/65 36 NW AERO 35 NW RMY 35
11/11 56/40/48/+5/0.00/0.0/501/84 26 SE AERO 28 SE RMY 27
11/12 61/45/53/+10/1.00/0.0/000/00 72 SSE AERO 78 SSE RMY 76
11/13 60/36/48/+5/0.32/0.0/556/94 53 SW AERO 53 SW RMY 54
11/14 47/33/40/-2/0.03/0.0/336/57 29 W AERO 28 W RMY 28
11/15 48/36/42/0/0.07/0.0/405/69 35 W AERO 36 W RMY 38
11/16 46/31/39/-3/0.00/0.0/…/.. 40 WNW AERO 41 WNW RMY 42
11/17 49/30/40/-1/0.00/0.0/…/.. 34 S AERO 36 S RMY 34
11/18 69/49/59/+18/T/0.0/…/.. 39 NW AERO 36 WNW RMY 42
11/19 51/32/42/+1/0.29/0.0/…/.. 42 W AERO 41 W RMY 41
11/20 45/27/36/-4/0.00/0.0/…/.. 23 S AERO 23 S RMY 24
11/21 52/36/44/+4/T/0.0/…/.. 35 S AERO 35 S RMY 36
11/22 55/33/44/+4/0.09/0.0/…/.. 41 WSW AERO 41 WSW RMY 42
11/23 38/24/31/-8/0.00/0.0/…/.. 36 NW AERO 37 NW RMY 37
11/24 41/22/32/-7/0.00/0.0/…/.. 33 NW AERO 32 NW RMY 34
11/25 53/31/42/+3/0.00/0.0/…/.. 21 WNW AERO 21 W RMY 21
11/26 43/31/37/-1/0.11/0.9/…/.. 39 WNW AERO 39 WNW RMY 41
11/27 37/24/31/-7/0.01/0.1/…/.. 47 WNW AERO 45 WNW RMY 48
11/28 36/24/30/-8/T/T/…/.. 22 W AERO 21 W RMY 23
11/29 39/25/32/-6/0.00/0.0/…/.. 30 NW AERO 28 NW RMY 30
11/30 40/21/31/-6/0.00/0.0/…/.. 27 WNW AERO 23 WSW RMY 26
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
12/03 41/28/35/-1/0.00/0.0/…/.. 46 NW AERO 44 NW RMY 46
12/04 The low since midnight is 25F, the daily normal low is 28F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 4
HIGH 67 IN 1998
LOW -4 IN 1940
PRECIP 1.87 INS. IN 1968
SNOWFALL 6.0 INS. IN 1907
PEAK GUST 73 MPH WNW IN 1980
RECORDS FOR DECEMBER 5
HIGH 65 IN 2001
LOW -1 IN 1926
PRECIP 2.86 INS. IN 1993
SNOWFALL 7.0 INS. IN 1893, 1895, 1926, 1981
PEAK GUST 67 MPH WNW IN 1961, S IN 1973
TODAY’S REPORT PREPARED BY: Benjamin Turner
