Friday, November 12, 2021

| November 12, 2021 | Reply

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

FRIDAY, NOVEMBER 12, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0632E
SUNSET:  1625E

DRY STREAK ENDS – DREARY, WET, AND WINDY ATOP THE HILL…

Clouds associated with an approaching low spilled into
the region overnight. A colorful sunrise was witnessed, but
faded quickly to a thickening cloud deck. The morning
was primarily dry, but featured escalating winds. Winds
speeds are now averaging 21 MPH with a peak gust clocking
in at 54 MPH from the SSE!

As we approached early afternoon, heavy rains scooted in.
Thus, today concludes the 11-day dry streak. In fact, this is
the longest consecutive period without any measurable or
even a trace of precipitation this year! It was certainly
a welcomed experience following several wet months.

Coinciding with the return of rain is the return of muggy
dew points. So far today we have observed dew points
in the upper-50s! Rain is expected to exit around dinner
time along with falling temperatures and dew points.

The high so far today is 59F, 8 degrees above the normal max of
51F. The low since midnight is 46F, 11 degrees above the normal
low of 35F.

————————————————————–

PRELIMINARY STATS FOR OCTOBER 2021

TEMPERATURE, Deg. F
Avg. Max. 64.1 [+3.1]
Avg. Min. 49.4 [+5.4]
Mean      56.9 [+4.3]
24-hour corrected mean: 56.3
Max. for month: 75F on the 13th
Min. for month: 37F on the 24th and 29th

HEATING DEGREE DAYS
Total heating units:    253 [-14]
Total for the season:   327 [-185]
Total for last season:  452

COOLING DEGREE DAYS
Total cooling units:      3  [-4]
Total for the season:    717 [+40]
Total for last season:   831

PRECIPITATION, Inches
Total: 7.87 [+2.38]
Greatest in 24 hrs: 2.23 inches on the 26th-27th

WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed:   11.4 mph
Prevailing wind direction:   WNW [10%]
Peak gust and direction:     66 NNE on the 27th

SUNSHINE:
Campbell-Stokes card minutes: 10494 minutes of a possible 19824 or 53%
Astronomical total minutes: 10865 minutes of a possible 20522 or 53%

—————————————————————-

Today’s Observations:

7 A.M.
Weather: Broken Stratus Fractus, Overcast Altostratus
Temperature: 51F; Dew Point: 45F; Relative Humidity: 79%
Wind: SE @ 17G26 kts
Peak Wind: 30 MPH (26 kts) SE @ 6:47 AM
Sea-level pressure: 1022.2 mb; 30.19 in. Hg: falling, then falling more rapidly
Visibility: 25 miles, hazy
6-hr Max temp: 51F
6-hr Min temp: 46F
24-hr Precip: 0.00 ins.
BHO SA 1155 30 BKN 50 OVC 25 222/51/45/1417G26/019/ HAZY PK WND 1426/47/ 8/62/
58034 10051 20046

10 A.M.
Weather: Overcast Stratus Fractus
Temperature: 55F; Dew Point: 53F; Relative Humidity: 93%
Wind: SE @ 24G41
Peak Wind: 47 MPH (41 kts) SE @ 9:50 AM
Sea-level pressure: 1018.7 mb; 30.08 in Hg; falling, then falling more rapidly
Visibility: 20 miles (thin fog)
3-hr Precip: 0.02 ins.
BHO SA 1455 20 OVC 20 187/55/53/1424G41/008/ THN F ALQDS R-E10 PK PK WND 1441/50/
8/6// 58035 6002/

1 P.M.
Weather: Overcast Stratus Fractus w/ Light Rain & Fog
Temperature: 58F, Dew point: 58F; Relative Humidity: 100%
Wind: SSE @ 30G47
Peak Wind: 54 MPH (47 kts) SSE @ 12:53 PM
Sea-level pressure: 1013.7 mb; 29.93 in Hg; Pressure Falling Rapidly
Visibility: 5 miles
6-hr Max temp: 59F
6-hr Min temp: 51F
6-hr Precip: 0.12 ins.
BHO SA 1755 15 OVC R-F5 137/58/58/1530G47/993/ PRESFR PK WND 1547/53/
8/7// 58070 6012/ 10059 20051

SUMMARY FOR THURSDAY, NOVEMBER 11, 2021

TEMPERATURE (DEGREES F)
MAX…….56     NORMAL…..52
MIN…….40     NORMAL…..35
MEAN……48     NORMAL…..43

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………  +5
TOTAL DEPARTURE FOR THE MONTH……………………… +19 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………17  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………..198  DEPARTURE…….-21
TOTAL HEATING UNITS FOR THE SEASON………….525  DEPARTURE……-206
TOTAL HEATING UNITS LAST SEASON TO DATE……..566  DEPARTURE…… -41

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….26 SE  @ 10:40 P.M.
AEROVANE……………….28 SE  @ 10:40 P.M.
VECTOR #2 (Instantaneous)..28     @ 10:38 P.M.
DAVIS #2 ………………26 SE  @ 10:40 P.M.
RMY #2 (Instantaneous)…..27 SE  @ 10:40 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………………19 SE  @ 10:40 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19     @ 10:34 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SE  @ 10:34 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SE  @ 10:34 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……. 9.1 SE [218 total miles]
VECTOR #2…………….. 9.9
DAVIS #2……………… 9.6 E
RMY #2……………….. 9.7 E
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…..-0.14
TOTAL PRECIPITATION FOR THE MONTH………….0.00  DEPARTURE…..-1.61
TOTAL PRECIPITATION FOR THE YEAR………….54.85  DEPARTURE…..+9.34

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……-0.4
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-1.1

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  The low since midnight is 46F, the daily normal low is 35F

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

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.39 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

RECORDS FOR NOVEMBER 13
HIGH 66 IN 1931, 1964
LOW 14 IN 1920
PRECIP 1.96 INCHES IN 1982
SNOWFALL 4.6 IN 2004
PEAK GUST 77 S IN 1982

TODAY’S REPORT PREPARED BY: Andrew Swanson & Augustin Busschaert

Category: Daily Discussions

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