Thursday, December 2, 2021

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

THURSDAY, DECEMBER 2, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0655E
SUNSET:  1612E

A MOSTLY CLOUDY DAY FOLLOWING SOME VERY LIGHT MORNING
RAINFALL….

Today consisted of some very light rainfall around 7 A.M., only
leaving a trace. Skies were mostly cloudy, and visibility was
30 miles at most due to a thin layer of fog in the distance.

Pressure dropped quite a bit since 7 A.M., by almost 9 millibars.
We had significant wind today too, mostly being from the south.
Average wind speed was a little higher than 15 mph, with a max gust
of 35 mph seen so far today.

The high so far today is 58F, which is 14 degrees above the normal
max of 44F. The low since midnight is 40F, 11 degrees above the
normal low of 29F. Mild!

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus, very light rain beginning at
6:55 A.M.
Temperature: 40F; Dew Point: 38F; Relative Humidity: 92%
Wind: SW @ 16G24 kts
Sea-level pressure: 1012.7 mb; 30.03 in. Hg: falling unsteadily
Visibility: 15 miles, thin fog
6-hr Max temp: 40F
6-hr Min temp: 34F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 60 OVC 15R- 127/40/38/1516G24/991/ THN F ALQDS R-B55
PCPN VRY LGT/ 8/6// 70000 57038 10040 20034

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus and
overcast cirrostratus with breaks
Temperature: 47F; Dew Point: 44F; Relative Humidity: 90%
Wind: S @ 15G28 kts, peak of 35 mph at 8:58 A.M.
Sea-level pressure: 1009.4 mb; 29.82 in Hg; falling unsteadily
Visibility: 25 miles, thin fog
3-hr Precip: Trace
3-hr Snowfall: 0.0 ins.
BHO SA 1455 50 SCT 80 BKN 250 OVC 25 094/47/44/1815G28/982/ THN F
BINOVC ALQDS PK WND 1830/1358/ 8/876 600// 57034

1 P.M.
Weather: Scattered stratocumulus, broken cirrostratus
Temperature: 58F, Dew point: 44F; Relative Humidity: 63%
Wind: WSW @ 13G20 kts
Sea-level pressure: 1004.2 mb; 29.65 in Hg; falling, then more
slowly
Visibility: 30 miles, thin fog
6-hr Max temp: 58F
6-hr Min temp: 40F
6-hr Precip: Trace
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 50 SCT 250 BKN 30 042/56/44/2513G20/965/ HAZY/ 8/806
600// 56052 10058 20040

SUMMARY FOR WEDNESDAY, DECEMBER 1, 2021

TEMPERATURE (DEGREES F)
MAX…….44     NORMAL…..45
MIN…….30     NORMAL…..29
MEAN……37     NORMAL…..37

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………   0
TOTAL DEPARTURE FOR THE MONTH………………………  +0 [-0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………28  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………28  DEPARTURE……..-0
TOTAL HEATING UNITS FOR THE SEASON…………1035  DEPARTURE……-197
TOTAL HEATING UNITS LAST SEASON TO DATE……..987  DEPARTURE…… +48

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….35 W   @ 10:32 A.M.
AEROVANE……………….35 W   @ 10:33 A.M.
VECTOR #2 (Instantaneous)..36     @ 10:32 A.M.
DAVIS #2 ………………35 W   @ 10:32 A.M.
RMY #2 (Instantaneous)…..34 W   @ 10:32 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………………21 W   @ 11:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23     @ 11:17 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 W   @ 11:17 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 W   @ 11:17 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…….10.2 WSW  [244 total miles] VECTOR #2……………..11.0
DAVIS #2………………11.0 WNW
RMY #2………………..11.0 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…..-0.18
TOTAL PRECIPITATION FOR THE MONTH………….0.00  DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE YEAR………….56.77  DEPARTURE…..+8.38

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……1.0  DEPARTURE……-1.7

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   The low since midnight is 34F, the daily normal low is 29F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942

RECORDS FOR DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942

TODAY’S REPORT PREPARED BY: Benjamin Turner