Monday, November 15, 2021

| November 15, 2021 | Reply

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

MONDAY, NOVEMBER 15, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0635E
SUNSET:  1622E

MIX OF SUN AND CLOUDS WITH A CHILLY BREEZE….

Another weak disturbance passed through the region overnight
bringing with it some showers and even some wet snow for some
across interior high elevation areas. This system deposited
0.10″ of rain in our gauge here at Blue Hill.

In its wake, a mix of sun and clouds have been the theme
today with cool temperatures mainly hanging in the mid-upper
40s here on the summit, but reaching the low 50s down below.

The wind has gotten busy as the early afternoon progresses
out of the west-northwest. Speeds have increased from around
7-8 mph this morning to 15 mph early this afternoon. A peak
gust of 29 mph has been measured so far.

Dew points are starting to drop off as mixing from aloft
increases, from the mid 30s early this morning to the low
30s so far early this afternoon.

Visibility has gradually been increasing, from 15 miles early
this morning in thin fog to 60 miles early this afternoon.

The high so far today is 47F, 3 degrees below the normal max
of 50F. The low since midnight is 36F, 2 degrees above the
normal low of 34F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus, scattered cirrostratus, stratus fractus
occasionally drifting over summit, few stratocumulus distant all quadrants
Temperature: 36F; Dew Point: 36F; Relative Humidity: 100%
Wind: W @ 7 kts
Sea-level pressure: 1005.5 mb; 29.69 in. Hg: falling, then steady
Visibility: 15 miles, thin fog
6-hr Max temp: 42F
6-hr Min temp: 36F
24-hr Precip: 0.10 ins.
BHO SA 1155 1 SCT 180 SCT 15 055/36/36/2607/969/ STFRA OCNLY DRFTG
OVR SMT FEW SC DSNT ALQDS THN F ALQDS/ 8/708 56010 6006/ 70010
10042 20036

10 A.M.
Weather: Scattered stratocumulus
Temperature: 40F; Dew Point: 36F; Relative Humidity: 85%
Wind: WSW @ 7G14 kts
Sea-level pressure: 1005.4 mb; 29.69 in Hg; steady, then falling
Visibility: 40 miles, thin fog
3-hr Precip: 0.00 ins.
BHO SA 1455 20 SCT 40 054/40/36/2507G14/969/ THN F ALQDS/ 8/500 58001

1 P.M.
Weather: Broken stratocumulus, broken altocumulus
Temperature: 46F, Dew point: 32F; Relative Humidity: 57%
Wind: WNW @ 13G24 kts
Sea-level pressure: 1004.6 mb; 29.67 in Hg; rising, then falling
Visibility: 60 miles
6-hr Max temp: 47F
6-hr Min temp: 36F
6-hr Precip: 0.00 ins.
BHO SA 1755 E40 BKN 100 BKN 60 046/46/32/2913G24/967/ 8/570 58008
10047 20036

SUMMARY FOR SUNDAY, NOVEMBER 14, 2021

TEMPERATURE (DEGREES F)
MAX…….47     NORMAL…..51
MIN…….33     NORMAL…..34
MEAN……40     NORMAL…..42

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -2
TOTAL DEPARTURE FOR THE MONTH……………………… +32 [+2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………25  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..252  DEPARTURE…….-34
TOTAL HEATING UNITS FOR THE SEASON………….579  DEPARTURE……-218
TOTAL HEATING UNITS LAST SEASON TO DATE……..622  DEPARTURE…… -43

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….29 W   @ 12:17 A.M.
AEROVANE……………….28 W   @ 12:11 A.M.
VECTOR #2 (Instantaneous)..30     @  1:10 A.M.
DAVIS #2 ………………28 W   @  1:11 A.M.
RMY #2 (Instantaneous)…..28 W   @  1:10 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………………20 W   @ 12:24 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20     @ 12:22 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 W   @ 12:22 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 W   @ 12:22 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……. 10.0 WSW [240 total miles]
VECTOR #2…………….. 10.7
DAVIS #2……………… 10.8 WSW
RMY #2……………….. 10.7 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…….0.10  DEPARTURE…..-0.03
TOTAL PRECIPITATION FOR THE MONTH………….1.42  DEPARTURE…..-0.61
TOTAL PRECIPITATION FOR THE YEAR………….56.27  DEPARTURE….+10.34

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……-0.5
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-1.2

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/…/..      38 WNW AERO 39 WNW RMY 39
11/02   56/40/48/+1/0.00/0.0/…/..      25 SW  AERO 25 SW  RMY 26
11/03   51/35/43/-3/0.00/0.0/…/..      28 W   AERO 25 W   RMY 27
11/04   49/31/40/-6/0.00/0.0/…/..      17 NNE AERO 17 NNW RMY 16
11/05   49/32/41/-5/0.00/0.0/…/..      25 NW  AERO 24 NW  RMY 24
11/06   51/34/43/-2/0.00/0.0/…/..      18 SSW AERO 17 SW  RMY 19
11/07   55/37/46/+1/0.00/0.0/…/..      17 W   AERO 17 W   RMY 16
11/08   60/38/49/+4/0.00/0.0/…/..      20 N   AERO 18 N   RMY 19
11/09   69/45/57/+13/0.00/0.0/…/..     21 W   AERO 21 W   RMY 22
11/10   60/44/52/+8/0.00/0.0/…/..      36 NW  AERO 35 NW  RMY 35
11/11   56/40/48/+5/0.00/0.0/…/..      26 SE  AERO 28 SE  RMY 27
11/12   61/45/53/+10/1.00/0.0/…/..     72 SSE AERO 78 SSE RMY 76
11/13   60/36/48/+5/0.32/0.0/…/..      53 SW  AERO 53 SW  RMY 54
11/14   47/33/40/-2/0.03/0.0/…/..      29 W   AERO 28 W   RMY 28

11/15  The low since midnight is 36F, the daily normal low is 34F

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

RECORDS FOR NOVEMBER 15
HIGH 74 IN 1993
LOW 15 IN 1933
PRECIP 1.66 INCHES IN 1981
SNOWFALL 6.5 IN 2018
PEAK GUST 65 SSE IN 2008

RECORDS FOR NOVEMBER 16
HIGH 73 IN 1927
LOW 8 IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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