Wednesday, November 17, 2021

| November 17, 2021 | Reply

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

WEDNESDAY, NOVEMBER 17, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0638E
SUNSET:  1620E

INCREASINGLY CLOUDY WITH LIGHT WIND AND GOOD
VISIBILITY….

We observed almost clear skies this morning with skies
becoming overcast with breaks by 1 P.M. Wind has been
light with an average speed of 5 mph or less. The peak
so far today is around 19 mph occurring very early this
morning.

Pressure is on a steady drop since noontime with the
increase in cloud cover. Visibility is good with 70
miles being seen on average. Dew points are in the
upper 20’s.

Despite below freezing overnight temperatures, Houghton’s
pond and Ponkapoag lake still have no signs of ice cover.

The high so far today is 46F, 4 degrees below the normal max
of 50F. The low since midnight is 30F, 3 degrees below the
normal low of 33F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few distant cumulus NE-S, few distant cirrostratus
Temperature: 32F; Dew Point: 28F; Relative Humidity: 84%
Wind: NNW @ 7 kts
Sea-level pressure: 1026.9 mb; 30.32 in. Hg: rising, then more rapidly
Visibility: 75 miles
6-hr Max temp: 33F
6-hr Min temp: 30F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 75 269/32/28/3307/032/ FEW CU DSNT NE-S FEW CS DSNT
ALQDS/ 8/105 53015 10033 20030

10 A.M.
Weather: Scattered cirrostratus, few altocumulus NW-N
Temperature: 40F; Dew Point: 30F; Relative Humidity: 67%
Wind: NW @ 2 kts, light and variable
Sea-level pressure: 1028.4 mb; 30.37 in Hg; rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 70 284/40/30/3202/037/ FEW AC/AS NW-N WND L/V/
8/055 51015

1 P.M.
Weather: Overcast altocumulus with breaks to the NE-S
Temperature: 44F, Dew point: 28F; Relative Humidity: 53%
Wind: SW @ 5 kts, wind light
Sea-level pressure: 1025.9 mb; 30.29 in Hg; falling unsteadily
Visibility: 70 miles
6-hr Max temp: 46F
6-hr Min temp: 32F
6-hr Precip: 0.00 ins.
BHO SA 1755 120 OVC 70 259/44/28/2205/029/ BINOVC NE-S WND LGT/
8/070 57025 10046 20032

SUMMARY FOR TUESDAY, NOVEMBER 16, 2021

TEMPERATURE (DEGREES F)
MAX…….46     NORMAL…..50
MIN…….31     NORMAL…..34
MEAN……39     NORMAL…..42

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  -3
TOTAL DEPARTURE FOR THE MONTH……………………… +29 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………26  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..301  DEPARTURE…….-31
TOTAL HEATING UNITS FOR THE SEASON………….628  DEPARTURE……-215
TOTAL HEATING UNITS LAST SEASON TO DATE……..662  DEPARTURE…… -34

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….40 WNW @  3:02 P.M.
AEROVANE……………….41 WNW @  3:02 P.M.
VECTOR #2 (Instantaneous)..43     @  3:02 P.M.
DAVIS #2 ………………37 WNW @  3:02 P.M.
RMY #2 (Instantaneous)…..42 WNW @  3:02 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………………27 WNW @  3:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28     @  3:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW @  3:08 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 W   @  3:08 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……. 14.9 W  [358 total miles]
VECTOR #2…………….. 15.7
DAVIS #2……………… 15.7 WNW
RMY #2……………….. 15.5 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………….1.42  DEPARTURE…..-0.88
TOTAL PRECIPITATION FOR THE YEAR………….56.27  DEPARTURE….+10.07

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  The low since midnight is 30F, 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 17
HIGH 74 IN 1928
LOW 10 IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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