Friday, November 19, 2021

| November 19, 2021 | Reply

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

FRIDAY, NOVEMBER 19, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0640E
SUNSET:  1619E

FOLLOWING YESTERDAY’S NEAR RECORD WARTH, IT’S STRAIGHT BACK
TO THE CHILL…

Main story here is the dramatic change in temperature over
the past 24-hours. At the 7 AM observation yesterday, we saw
the mercury begin at 54F coinciding with a dew point of 52F!
The early afternoon featured a near-recording setting high of
69F. This will go down as the 3rd warmest day for this date
falling just shy of the all-time max of 72F set in 1963.

Just after midnight today, a cold front swiped through the
area flipping winds from the SW to WNW. The mercury took
a tumble to 37F by sunrise. For those in central and eastern
MA who hoped to catch the lunar eclipse, the frontal passage
obscured most of the action. If eager for another opportunity,
the next occurance is just 6 months away, so mark your calendars
for May 15, 2022!

As for the daytime hours, we are seeing mostly sunny skies with
improving visibility. The wind has escalated peaking at 42 MPH
with an average now at 15 MPH.

The high so far today is 51F (set at midnight), 2 degrees above the
normal max of 49F. The low since midnight is 37F, 4 degrees above
the normal low of 33F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken Stratocumulus (Line of stratocumulus offshore distant
NE-SE moving east)
Temperature: 37F; Dew Point: 36F; Relative Humidity: 97%
Wind: WNW @ 10G16kts
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: rising, then rising more rapidly
Visibility: 35 miles, thin fog
6-hr Max temp: 47F
6-hr Min temp: 37F
24-hr Precip: 0.29 ins.
BHO SA 1155 10 BKN 35 163/37/36/2910G16/001/ LINE SC OFFSHR DSNT NE-SE MVG E
THN F ALQDS/ 8/500 53017 70029 10047 20037

10 A.M.
Weather: Scattered Cumulus and Stratocumulus
Temperature: 42F; Dew Point: 30F; Relative Humidity: 62%
Wind: WNW @ 15G24kts
Sea-level pressure: 1018.3 mb; 30.07 in Hg; rising unsteadily
Visibility: 50 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT 50 183/42/30/3015G24/007/ HAZY/ 8/500 52020

1 P.M.
Weather: Scattered Cumulus
Temperature: 44F, Dew point: 26F; Relative Humidity: 48%
Wind: WNW @ 20G33 kts
Peak Wind: 38 MPH (33 knots) WNW @ 12:48 PM
Sea-level pressure: 1018.9 mb; 30.08 in Hg; rising, then rising more rapidly
Visibility: 75 miles
6-hr Max temp: 45F
6-hr Min temp: 37F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 75 189/44/26/2920G33/008/ PK WND 2933/48 8/100 53006
10045 20037

SUMMARY FOR THURSDAY, NOVEMBER 18, 2021

TEMPERATURE (DEGREES F)
MAX…….69     NORMAL…..49
MIN…….49     NORMAL…..33
MEAN……59     NORMAL…..41

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… +18
TOTAL DEPARTURE FOR THE MONTH……………………… +46 [+2.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….6  DEPARTURE…….+18
TOTAL HEATING UNITS FOR THE MONTH…………..332  DEPARTURE…….-47
TOTAL HEATING UNITS FOR THE SEASON………….659  DEPARTURE……-232
TOTAL HEATING UNITS LAST SEASON TO DATE……..726  DEPARTURE…… -67

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….39 NW  @ 11:37 P.M.
AEROVANE……………….36 WNW @ 10:57 P.M.
VECTOR #2 (Instantaneous)..42     @ 11:37 P.M.
DAVIS #2 ………………38 S   @ 12:16 A.M.
RMY #2 (Instantaneous)…..42 NW  @ 11:37 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………………28 NW  @ 11:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28     @ 11:38 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S   @ 12:32 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 NW  @ 11:38 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……. 16.6 S [399 total miles]
VECTOR #2…………….. 17.6
DAVIS #2……………… 17.4 SSW
RMY #2……………….. 17.9 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…….0.29  DEPARTURE…..+0.16
TOTAL PRECIPITATION FOR THE MONTH………….1.71  DEPARTURE…..-0.85
TOTAL PRECIPITATION FOR THE YEAR………….56.56  DEPARTURE….+10.10

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……-0.7
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  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/+18/0.00/0.0/…/..     39 NW  AERO 36 WNW RMY 42

11/19   The low since midnight is 37F, 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 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

RECORDS FOR NOVEMBER 20
HIGH 72 IN 1953
LOW 9 IN 1894
PRECIP 2.78 INS IN 1988
SNOWFALL 3.0 INS IN 1897
PEAK GUST 73e S IN 1950

TODAY’S REPORT PREPARED BY: Andrew Swanson

Category: Daily Discussions

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