Tuesday, November 23, 2021

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

TUESDAY, NOVEMBER 23, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0645E
SUNSET:  1616E

COLDEST DAY OF THE SEASON THUS FAR TODAY DESPITE PLENTY OF SUNSHINE….

Some morning clouds have given way to mainly clear skies early this
afternoon, however the abundance of sunshine isn’t helping the
temperature rise very much as the coldest air mass of this early
season sits over the region. We started the day down in the mid-upper
20s, and have only recovered to the upper 30s as of early this
afternoon.

The dew point is quite low, dropping from the upper teens this
morning to the low-mid teens early this afternoon. This is quite
indicative of the cold and dry air mass in place.

There has been a bit of a breeze today to go along with the cold
temperatures, helping to hold wind chill values in the upper 20s
to low 30s. Wind speeds have been averaging around 12mph today with a
peak gust to 31mph thus far.

Visibility is of course excellent today with the super dry air. We’re
able to easily see 80 miles. Mount Monadnock, which is 67 miles NW of
Blue Hill, is coming in nice and clear today!

The high so far today is 37F, 10 degrees below the normal max of 47F.
The low since midnight is 27F, 5 degrees below the normal low of 32F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Thin broken cirrus, few stratocumulus offshore distant NE-SE
and distant W-NW
Temperature: 27F; Dew Point: 19F; Relative Humidity: 72%
Wind: NNW @ 9G17 kts
Sea-level pressure: 1011.6 mb; 29.87 in. Hg: falling, then rising
Visibility: 70 miles
6-hr Max temp: 32F
6-hr Min temp: 27F
24-hr Precip: 0.06 ins.
BHO SA 1155 E250 -BKN 70 116/27/19/3309G17/987/ FEW SC OFFSHR DSNT NE-SE
AND DSNT W-NW/ 8/501 53008 70006 10032 20027

10 A.M.
Weather: Broken cirrocumulus, thin broken cirrus, few stratocumulus distant
all quadrants
Temperature: 32F; Dew Point: 18F; Relative Humidity: 56%
Wind: NNW @ 12G23 kts, peak wind NNW 30 mph at 9:06 A.M.
Sea-level pressure: 1012.1 mb; 29.89 in Hg; rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E200 BKN 250 -BKN 80 121/32/18/3412G23/989/ FEW SC DSNT ALQDS
PK WND 3326/06/ 8/506 51005

1 P.M.
Weather: Clear, few stratocumulus distant all quadrants, few cirrus distant NNE-SE
Temperature: 36F, Dew point: 14F; Relative Humidity: 40%
Wind: NNW @ 12G26 kts, peak wind NNW 30 mph at 12:54 A.M.
Sea-level pressure: 1011.7 mb; 29.88 in Hg; falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 37F
6-hr Min temp: 27F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 80 117/36/14/3312G26/988/ FEW SC DSNT ALQDS FEW CI DSNT NNE-SE
PK WND 3326/54/ 8/501 56004 10037 20027

SUMMARY FOR MONDAY, NOVEMBER 22, 2021

TEMPERATURE (DEGREES F)
MAX…….55     NORMAL…..48
MIN…….33     NORMAL…..32
MEAN……44     NORMAL…..40

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  +4
TOTAL DEPARTURE FOR THE MONTH……………………… +51 [+2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..426  DEPARTURE…….-52
TOTAL HEATING UNITS FOR THE SEASON………….753  DEPARTURE……-237
TOTAL HEATING UNITS LAST SEASON TO DATE……..811  DEPARTURE…… -58

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….41 WSW @  5:48 A.M.
AEROVANE……………….41 WSW @  5:48 A.M.
VECTOR #2 (Instantaneous)..43     @  5:48 A.M.
DAVIS #2 ………………41 S   @  4:40 A.M.
RMY #2 (Instantaneous)…..42 WSW @  5:48 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………………29 S   @ 12:22 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29     @  4:14 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 S   @ 12:28 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 SSW @  4:14 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…….14.1 WNW  [338 total miles] VECTOR #2……………..14.5
DAVIS #2………………14.7 W
RMY #2………………..14.4 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…….0.06  DEPARTURE…..-0.08
TOTAL PRECIPITATION FOR THE MONTH………….1.80  DEPARTURE…..-1.31
TOTAL PRECIPITATION FOR THE YEAR………….56.65  DEPARTURE…..+9.64

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE……-0.9
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-1.6

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   The low since midnight is 27F, the daily normal low is 32F

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

RECORDS FOR NOVEMBER 23
HIGH 73 IN 1931
LOW 9 IN 1888, 2018
PRECIP 2.33 INS IN 2006
SNOWFALL 5.5 INS IN 1989
PEAK GUST 64e S IN 1953

RECORDS FOR NOVEMBER 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959

TODAY’S REPORT PREPARED BY: Matt Douglas