Wednesday, December 1, 2021

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

WEDNESDAY, DECEMBER 1, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0654E
SUNSET:  1613E

MILDER WITH MOSTLY CLOUDY SKIES AND A COOL WESTERLY BREEZE….

We observed an average visibility of 35 miles, with a max of
80 miles at the 10 A.M. observation. Skies were mostly cloudy
for the majority of the day.

There is a chilly north westerly breeze with an average speed of
10 mph and a max gust around 26 mph.

Temperatures are trending back to normal for this time of year.

The high so far today is 44F, which is a degree below the normal
max of 45F. The low since midnight is 30F, a degree above the
normal low of 29F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus and broken cirrostratus
Temperature: 31F; Dew Point: 28F; Relative Humidity: 89%
Wind: SW @ 10G15 kts
Sea-level pressure: 1017.0 mb; 30.03 in. Hg: rising, then more
rapidly
Visibility: 20 miles, thin fog
6-hr Max temp: 31F
6-hr Min temp: 30F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 70 SCT 250 BKN 20 170/31/28/2410G15/003/ THN F ALQDS/
8/056 53022 10031 20030

10 A.M.
Weather: Scattered altocumulus and broken cirrostratus
Temperature: 39F; Dew Point: 29F; Relative Humidity: 57%
Wind: W @ 14G19 kts
Sea-level pressure: 1017.4 mb; 30.04 in Hg; rising then falling
Visibility: 35 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 70 SCT 250 BKN 35 174/39/29/2814G19/004/ 8/056 51004

1 P.M.
Weather: Scattered altocumulus and broken cirrostratus, few
stratocumulus W-WNW, breaks in overcast ENE-S-SSW
Temperature: 42F, Dew point: 27F; Relative Humidity: 54%
Wind: NW @ 10G17 kts
Sea-level pressure: 1017.1 mb; 30.03 in Hg; rising then falling
Visibility: 75 miles
6-hr Max temp: 44F
6-hr Min temp: 31F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 170 SCT 250 OVC 75 171/42/27/3110G17/003/ FEW SC W-NNW BINOVC
ENE-S-SSW/ 8/856 55003 10044 20031

SUMMARY FOR TUESDAY, NOVEMBER 30, 2021

TEMPERATURE (DEGREES F)
MAX…….40     NORMAL…..45
MIN…….21     NORMAL…..29
MEAN……31     NORMAL…..37

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -6
TOTAL DEPARTURE FOR THE MONTH……………………… +12 [+0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………34  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH…………..680  DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE SEASON…………1007  DEPARTURE……-197
TOTAL HEATING UNITS LAST SEASON TO DATE……..973  DEPARTURE…… +34

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….27 WNW @  1:11 A.M.
AEROVANE……………….23 WSW @  2:01 P.M.
VECTOR #2 (Instantaneous)..28     @  1:11 P.M.
DAVIS #2 ………………24 W   @  2:17 P.M.
RMY #2 (Instantaneous)…..26 WNW @  1:11 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………………16 WSW @  2:02 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18     @ 12:57 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 WSW @ 12:42 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 WNW @ 12:57 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……..9.9 SW  [238 total miles] VECTOR #2……………..10.5
DAVIS #2………………10.7 W
RMY #2………………..10.6 W
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…..-0.16
TOTAL PRECIPITATION FOR THE MONTH………….1.92  DEPARTURE…..-2.39
TOTAL PRECIPITATION FOR THE YEAR………….56.77  DEPARTURE…..+8.56

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH……………….1.0  DEPARTURE……-0.8
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……1.0  DEPARTURE……-1.5

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

12/01   The low since midnight is 30F, 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 1
HIGH 70 IN 2001
LOW 3 IN 1887
PRECIP 1.46 INS. IN 1917
SNOW 5.7 INS. IN 2019
PEAK GUST 72 MPH NW IN 1964

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

TODAY’S REPORT PREPARED BY: Benjamin Turner