Sunday, November 21, 2021

| November 21, 2021 | Reply

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

SUNDAY, NOVEMBER 21, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0643E
SUNSET:  1617E

MILDER TODAY DESPITE A LOT OF CLOUD COVER LIMITING SUNSHINE….

Definitely more clouds than sun today, however it’s not a bad day
at all considering we’re now into the final 3rd of November.
Temperatures are milder today than the past couple with the mercury
getting into the low 50s here on the summit.

The wind has been blowing pretty steadily, enough to add a bit of a
chill to the air especially with the elusive sunshine. The average
speed so far today is around 11mph, with a peak gust of 23mph so far.

Visibility has been fair today, averaging 50-60 miles.

The high so far today is 51F, 3 degrees above the normal max of 48F.
The low since midnight is 36F, 4 degrees above the normal low of 32F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altostratus, overcast cirrostratus,
virga all quadrants
Temperature: 41F; Dew Point: 36F; Relative Humidity: 82%
Wind: SW @ 8kts
Sea-level pressure: 1027.9 mb; 30.35 in. Hg: steady, then falling
Visibility: 50 miles
6-hr Max temp: 41F
6-hr Min temp: 36F
24-hr Precip: 0.00 ins.
BHO SA 1155 45 SCT E150 BKN 200 OVC 50 279/41/36/2308/035/ VIRGA ALQDS/
8/527 58003 10041 20036

10 A.M.
Weather: Broken altostratus, overcast cirrostratus, few breaks in overcast
overhead-SW-W, few stratocumulus NE-SE-S, virga all quadrants
Temperature: 44F; Dew Point: 36F; Relative Humidity: 73%
Wind: SW @ 6kts
Sea-level pressure: 1027.2 mb; 30.33 in Hg; falling, then more rapidly
Visibility: 50 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E120 BKN 200 OVC 50 272/44/36/2206/033/ FEW BINOVC OVHD-SW-W
FEW SC NE-SE-S VIRGA ALQDS SUN DMLY VSBL/ 8/517 58007

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus, overcast cirrostratus,
few breaks in overcast all quadrants
Temperature: 50F, Dew point: 39F; Relative Humidity: 65%
Wind: SSW @ 8 kts
Sea-level pressure: 1024.1 mb; 30.24 in Hg; falling steadily
Visibility: 60 miles
6-hr Max temp: 51F
6-hr Min temp: 41F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 120 BKN 200 OVC 60 241/50/39/2008/024/ FEW BINOVC ALQDS/
8/537 57031 10051 20041

SUMMARY FOR SATURDAY, NOVEMBER 20, 2021

TEMPERATURE (DEGREES F)
MAX…….45     NORMAL…..49
MIN…….27     NORMAL…..32
MEAN……36     NORMAL…..40

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -4
TOTAL DEPARTURE FOR THE MONTH……………………… +43 [+2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………..384  DEPARTURE…….-44
TOTAL HEATING UNITS FOR THE SEASON………….711  DEPARTURE……-229
TOTAL HEATING UNITS LAST SEASON TO DATE……..771  DEPARTURE…… -60

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….23 S   @  6:31 P.M.
AEROVANE……………….23 S   @  6:31 P.M.
VECTOR #2 (Instantaneous)..24     @  6:31 P.M.
DAVIS #2 ………………27 S   @  6:27 P.M.
RMY #2 (Instantaneous)…..24 SSW @  6:31 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 S   @ 10:39 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18     @ 10:37 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 S   @  6:29 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 SSW @ 10:37 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……. 9.0 NW [216 total miles]
VECTOR #2…………….. 9.8
DAVIS #2……………… 9.4 WSW
RMY #2……………….. 9.8 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…..-0.13
TOTAL PRECIPITATION FOR THE MONTH………….1.71  DEPARTURE…..-1.12
TOTAL PRECIPITATION FOR THE YEAR………….56.56  DEPARTURE…..+9.83

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……-0.8
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  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   The low since midnight is 36F, 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 21
HIGH 69 IN 1931
LOW 10 IN 1888
PRECIP 3.41 INCHES IN 1950
SNOWFALL 4.0 INS IN 1929
PEAK GUST 69 NW IN 1989

RECORDS FOR NOVEMBER 22
HIGH 70 IN 1931
LOW 9 IN 2018
PRECIP 1.78 INS IN 2005
SNOWFALL 9.0 INS IN 1971
PEAK GUST 70e SE IN 1945

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

Leave a Reply