Friday, December 3, 2021

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

FRIDAY, DECEMBER 3, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0656E
SUNSET:  1612E

WIND PERSISTS, COLD RETURNS…

Yesterday evening featured a potent cold front that rushed through
the region just after 10 PM. Winds suddenly shifted from the SSW to
WNW bringing with it a peak gust of 56 MPH! Surprising, only a
trace of rain was deposited in the gauge.

Since it’s passing, temperatures have cooled off substantiality. After
notching a 58 degree high yesterday, post-front temps find themselves
in the mid to upper 30s…more normal for this time of year. Winds are
breezy from the WNW averaging 20 MPH.

Looking to the west of BHO, visibility is spectacular today. 80 to 85
miles has been the theme.

The high so far today is 41F, which is 3 degrees below the normal
max of 44F. The low since midnight is 36F, 7 degrees above the
normal low of 29F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken Stratocumulus
Temperature: 38F; Dew Point: 26F; Relative Humidity: 63%
Wind: WNW @ 18G30 kts
Peak Wind: 34 MPH (30 kts) WNW @ 6:54 AM
Sea-level pressure: 1004.6 mb; 29.67 in. Hg: rising unsteadily
Visibility: 80 miles
6-hr Max temp: 41F
6-hr Min temp: 38F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 50 BKN 80 046/38/26/2918G30/967/ PK WND 2930/54/ 8/500
52032 70000 10041 20038

10 A.M.
Weather: Scattered Cumulus
Temperature: 38F; Dew Point: 22F; Relative Humidity: 53%
Wind: NW @ 16G25 kts
Sea-level pressure: 1008.3 mb; 29.78 in Hg; rising unsteadily
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 45 SCT 80 083/38/22/3116G25/978/ 8/100 52037

1 P.M.
Weather: Scattered Cumulus (few altocumulus/altostratus SE-SW)
Temperature: 38F, Dew point: 20F; Relative Humidity: 48%
Wind: WNW @ 16G28 kts
Peak Wind: 32 MPH (28 kts) WNW @ 12:54 PM
Sea-level pressure: 1008.4 mb; 29.78 in Hg; falling, rising
Visibility: 85 miles
6-hr Max temp: 41F
6-hr Min temp: 36F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 50 SCT 85 084/38/20/3016G28/978/ FEW AC/AS SE-SW
PK WND 3028/54/ 8/130 53001 10041 20036

SUMMARY FOR THURSDAY, DECEMBER 2, 2021

TEMPERATURE (DEGREES F)
MAX…….58     NORMAL…..44
MIN…….35     NORMAL…..29
MEAN……47     NORMAL…..37

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… +10
TOTAL DEPARTURE FOR THE MONTH……………………… +10 [+4.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………18  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH……………46  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE SEASON…………1053  DEPARTURE……-207
TOTAL HEATING UNITS LAST SEASON TO DATE…….1015  DEPARTURE…… +38

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….56 WNW @ 10:17 P.M.
AEROVANE……………….59 WNW @ 10:17 P.M.
VECTOR #2 (Instantaneous)..68     @ 10:17 P.M.
DAVIS #2 ………………54 WNW @ 10:14 P.M.
RMY #2 (Instantaneous)…..62 WNW @ 10:17 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………………40 WNW @ 10:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..39     @ 10:16 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………40 WNW @ 10:16 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..39 WNW @ 10:16 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 SSW [417 total miles] VECTOR #2……………..17.6
DAVIS #2………………16.8 SSW
RMY #2………………..17.8 SSW
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……TRACE  DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH………….0.00  DEPARTURE…..-0.35
TOTAL PRECIPITATION FOR THE YEAR………….56.77  DEPARTURE…..+8.21

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……-0.4
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……1.0  DEPARTURE……-1.9

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   The low since midnight is 36F, 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 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

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

TODAY’S REPORT PREPARED BY: Andrew Swanson