Thursday, November 18, 2021

| November 18, 2021 | Reply

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

THURSDAY, NOVEMBER 18, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0639E
SUNSET:  1619E

VERY MILD FOR A MID-NOVEMBER DAY….

We observed partly cloudy skies for most of the day with
limited visibility due to either haze or fog. The max
visibility was 30 miles at the 1 P.M. observation.
Conditions are otherwise breezy with an average wind
speed of almost 20 mph and a max gust of 29 mph since
the 7 AM observation. Warmer air is being brought in
from the south.

Pressure is dropping increasingly faster to accompany the
strengthening wind.

The high so far today is 69F, 20 degrees above the normal max
of 49F. The low since midnight is 49F, 16 degrees above the
normal low of 33F.

The record maximum temperature for today is 72F, set in 1963.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered cirrus, few altocumulus NW-NE
Temperature: 54F; Dew Point: 52F; Relative Humidity: 94%
Wind: SSW @ 14G19 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: falling, then more rapidly
Visibility: 20 miles, thin fog
6-hr Max temp: 55F
6-hr Min temp: 50F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 20 179/54/52/2014G19/006/ FEW AC/AS NW-NE THN F ALQDS/
8/072 58006 10055 20050

10 A.M.
Weather: Scattered cirrus
Temperature: 62F; Dew Point: 53F; Relative Humidity: 73%
Wind: SSW @ 9G16 kts
Sea-level pressure: 1016.7 mb; 30.02 in Hg; falling, then more slowly
Visibility: 25 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 25 167/62/53/2009G16/002/ HAZY/ 8/002 56012

1 P.M.
Weather: Scattered cirrus
Temperature: 68F, Dew point: 51F; Relative Humidity: 55%
Wind: SW @ 16G25 kts
Sea-level pressure: 1013.5 mb; 29.92 in Hg; falling unsteadily
Visibility: 30 miles, hazy
6-hr Max temp: 69F
6-hr Min temp: 54F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 SCT 30 135/68/51/1816G25/992/ HAZY/ 8/002 57032
10069 20054

SUMMARY FOR WEDNESDAY, NOVEMBER 17, 2021

TEMPERATURE (DEGREES F)
MAX…….49     NORMAL…..50
MIN…….30     NORMAL…..33
MEAN……40     NORMAL…..41

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -1
TOTAL DEPARTURE FOR THE MONTH……………………… +28 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………25  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………..326  DEPARTURE…….-29
TOTAL HEATING UNITS FOR THE SEASON………….653  DEPARTURE……-214
TOTAL HEATING UNITS LAST SEASON TO DATE……..687  DEPARTURE…… -34

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….34 S   @ 10:58 P.M.
AEROVANE……………….36 S   @ 10:57 P.M.
VECTOR #2 (Instantaneous)..37     @ 10:58 P.M.
DAVIS #2 ………………43 S   @ 10:58 P.M.
RMY #2 (Instantaneous)…..34 S   @ 10:58 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………………29 S   @ 11:20 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27     @ 11:36 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 S   @ 11:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 S   @ 11:36 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……. 11.2 S  [268 total miles]
VECTOR #2…………….. 11.6
DAVIS #2……………… 12.0 SW
RMY #2……………….. 11.7 WSW
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………….1.42  DEPARTURE…..-1.01
TOTAL PRECIPITATION FOR THE YEAR………….56.27  DEPARTURE…..+9.94

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE……-0.0
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-1.3

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  The low since midnight is 49F, the daily normal low is 33F

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

RECORDS FOR NOVEMBER 18
HIGH 72 IN 1963
LOW 10 IN 1936
PRECIP 1.80 INS IN 1929
SNOWFALL 6.3 INS IN 1980
PEAK GUST 60 SW IN 1987

RECORDS FOR NOVEMBER 19
HIGH 72 IN 1941
LOW 10 IN 1936
PRECIP 1.92 INCHES IN 1926
SNOWFALL 11.0 INS IN 1986
PEAK GUST 59e E IN 1945

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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