Tuesday, November 30, 2021

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

TUESDAY, NOVEMBER 30, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0653E
SUNSET:  1613E

INCREASINGLY CLOUDY WITH GREAT VISIBILITY ATOP GREAT
BLUE HILL….

We observed an average visibility of 75 miles, with a max of
80 miles at the 10 A.M. observation. Cloud cover was negligible
this morning, but increased as the day went on.

There is a chilly westerly breeze with an average speed of 10 mph and
a max gust around 20 mph.

Temperatures are once again below normal with a high so far today
of 40F, 5 degrees below the normal max of 45F. The low since midnight
is 21F, 8 degrees below the normal low of 29F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few distant stratocumulus
Temperature: 22F; Dew Point: 13F; Relative Humidity: 68%
Wind: WNW @ 9G14 kts
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: rising unsteadily
Visibility: 75 miles, hazy
6-hr Max temp: 34F
6-hr Min temp: 21F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 75 146/22/13/3009G14/996/ FEW SC DSNT ALQDS/ 8/800
52014 10024 20021

10 A.M.
Weather: Scattered cirrus, few distant cumulus offshore
Temperature: 29F; Dew Point: 15F; Relative Humidity: 57%
Wind: W @ 8G13 kts
Sea-level pressure: 1015.2 mb; 29.98 in Hg; rising then falling
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 SCT 80 152/29/15/2708G13/998/ FEW CU DSNT OFFSHR/
8/102 50006

1 P.M.
Weather: Scattered cumulus, broken altocumulus and cirrocumulus
Temperature: 39F, Dew point: 17F; Relative Humidity: 41%
Wind: N @ 7 kts
Sea-level pressure: 1013.6 mb; 29.93 in Hg; falling, then more rapidly
Visibility: 75 miles
6-hr Max temp: 40F
6-hr Min temp: 22F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 45 SCT 140 BKN 250 BKN 75 136/39/17/2707/993/ 8/859 58016
10040 20022

SUMMARY FOR MONDAY, NOVEMBER 29, 2021

TEMPERATURE (DEGREES F)
MAX…….39     NORMAL…..45
MIN…….25     NORMAL…..30
MEAN……32     NORMAL…..38

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -6
TOTAL DEPARTURE FOR THE MONTH……………………… +18 [+0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………33  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH…………..646  DEPARTURE…….-18
TOTAL HEATING UNITS FOR THE SEASON………….973  DEPARTURE……-203
TOTAL HEATING UNITS LAST SEASON TO DATE……..959  DEPARTURE…… +14

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….30 NW  @  4:55 P.M.
AEROVANE……………….28 NW  @  4:55 P.M.
VECTOR #2 (Instantaneous)..31     @  4:55 P.M.
DAVIS #2 ………………26 NNW @  4:55 P.M.
RMY #2 (Instantaneous)…..30 NNW @  4:55 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………………19 NW  @  5:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20     @  4:58 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NW  @  4:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NW  @  4:58 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……..9.8 NNW  [236 total miles] VECTOR #2……………..10.5
DAVIS #2………………10.2 NNW
RMY #2………………..10.0 NNW
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…..-0.15
TOTAL PRECIPITATION FOR THE MONTH………….1.92  DEPARTURE…..-2.23
TOTAL PRECIPITATION FOR THE YEAR………….56.77  DEPARTURE…..+8.72

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH……………….1.0  DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……1.0  DEPARTURE……-1.4

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   The low since midnight is 21F, 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 NOVEMBER 30
HIGH 67 IN 2006
LOW 6 IN 1891
PRECIP 2.50 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963

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

TODAY’S REPORT PREPARED BY: Benjamin Turner