Friday, November 26, 2021

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

FRIDAY, NOVEMBER 26, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0648E
SUNSET:  1614E

CLOUDY, CHILLY, AND DAMP WITH A BIT OF LIGHT RAIN TODAY….

What a difference a day makes! After a pleasant holiday yesterday,
today the tables have turned with overcast skies, periods of light
rain, and considerably chillier temperatures.

Rainfall hasn’t really amounted to much at all with only 0.07″ being
measured for the entire event so far. 0.01″ of which fell upto 7 A.M.,
and the rest coming in the 6 hours ending at 1 P.M.

One thing we can be thankful for, the wind has been quite light today.
With the chilly damp air, any wind would make it feel quite unpleasant.
Wind speeds have averaged around 9mph for the day so far, with a peak
gust of only 18mph. However winds are expected to increase markedly
this evening once the front moves through and strong cold air advection
takes over.

Visibility has been limited all day due to rain and thin fog. We were
only able to see 10-12 miles all morning, but has since improved to
around 20 miles early this afternoon.

The high so far today is 43F, 3 degrees below the normal max of 46F.
The low since midnight is 39F, 9 degrees above the normal low of 30F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken stratus, overcast nimbostratus, light rain
Temperature: 39F; Dew Point: 36F; Relative Humidity: 89%
Wind: WSW @ 7 kts
Sea-level pressure: 1003.1 mb; 29.62 in. Hg: steady, then falling
Visibility: 12 miles, thin fog
6-hr Max temp: 41F
6-hr Min temp: 39F
24-hr Precip: 0.01 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E55 BKN 75 OVC 12R- 031/39/36/2507/962/ THN F ALQDS R-B13/ 8/72/
58009 6001/ 70001 10041 20039

10 A.M.
Weather: Broken stratus, overcast nimbostratus, light rain
Temperature: 40F; Dew Point: 39F; Relative Humidity: 96%
Wind: SW @ 7 kts
Sea-level pressure: 1001.0 mb; 29.56 in Hg; falling, then more rapidly
Visibility: 10 miles, thin fog
3-hr Precip: 0.03 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E40 BKN 50 OVC 10R- 010/40/39/2307/956/ THN F ALQDS R-B15/ 8/72/
58021 6003/

1 P.M.
Weather: Broken stratus fractus, overcast stratus
Temperature: 42F, Dew point: 41F; Relative Humidity: 96%
Wind: W @ 7 kts
Sea-level pressure: 996.9 mb; 29.44 in Hg; falling, then more rapidly
Visibility: 20 miles, thin fog
6-hr Max temp: 43F
6-hr Min temp: 39F
6-hr Precip: 0.06 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 E10 BKN 30 OVC 20 969/42/41/2707/944/ THN F ALQDS R-E13B34E49/ 8/7//
58041 6006/ 10043 20039

SUMMARY FOR THURSDAY, NOVEMBER 25, 2021

TEMPERATURE (DEGREES F)
MAX…….53     NORMAL…..47
MIN…….31     NORMAL…..31
MEAN……42     NORMAL…..39

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  +3
TOTAL DEPARTURE FOR THE MONTH……………………… +39 [+1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..516  DEPARTURE…….-40
TOTAL HEATING UNITS FOR THE SEASON………….843  DEPARTURE……-225
TOTAL HEATING UNITS LAST SEASON TO DATE……..888  DEPARTURE…… -45

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….21 WNW @  6:42 A.M.
AEROVANE……………….21 W   @  6:38 A.M.
VECTOR #2 (Instantaneous)..21     @  1:11 A.M.
DAVIS #2 ………………20 NW  @ 12:55 A.M.
RMY #2 (Instantaneous)…..21 NW  @ 12:36 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………………16 WNW @  6:19 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16     @  6:22 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 WNW @  6:22 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 WNW @  6:22 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……. 9.8 WNW  [236 total miles] VECTOR #2……………..10.9
DAVIS #2………………10.9 WNW
RMY #2………………..10.9 WNW
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…….0.01  DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH………….1.81  DEPARTURE…..-1.73
TOTAL PRECIPITATION FOR THE YEAR………….56.66  DEPARTURE…..+9.22

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……-1.2
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-1.9

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   52/36/44/+4/T/0.0/…/..         35 S   AERO 35 S   RMY 36
11/22   55/33/44/+4/0.09/0.0/…/..      41 WSW AERO 41 WSW RMY 42
11/23   38/24/31/-8/0.00/0.0/…/..      36 NW  AERO 37 NW  RMY 37
11/24   41/22/32/-7/0.00/0.0/…/..      33 NW  AERO 32 NW  RMY 34
11/25   53/31/42/+3/0.00/0.0/…/..      21 WNW AERO 21 W   RMY 21

11/26   The low since midnight is 39F, the daily normal low is 30F

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

RECORDS FOR NOVEMBER 26
HIGH 66 IN 1979
LOW 6 IN 1938
PRECIP 2.39 INS IN 1950
SNOWFALL 3.0 INS IN 1974
PEAK GUST 78 SSE IN 1964

RECORDS FOR NOVEMBER 27
HIGH 68 IN 1896
LOW 5 IN 1932
PRECIP 2.23 INS IN 2013
SNOWFALL 16.0 INS IN 1898
PEAK GUST 68 NW IN 1997

TODAY’S REPORT PREPARED BY: Matt Douglas