Sunday, December 4, 2022

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

SUNDAY, DECEMBER 4, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0657E
SUNSET:  1612E

QUITE THE CONTRAST TO YESTERDAY’S WEATHER, FOR SURE….

We received 0.31 inches of rainfall from the event yesterday,
but the main feature was the wind! The max gust was 54 mph,
with frequent gusts above 40 mph.

Today is much more normal for this time of year, as
temperatures climb into the low 40’s with an overnight
low below freezing. Visibility is an amazing 90 miles
this afternoon, which is the highest we can see from
the observatory!

Wind is northwest at only 10 mph. Skies have begun
to cloud over with some thinner cirrostratus to accompany
the relatively dry and cool weather.

The high so far today is 41F, which is 3 degrees below
the normal maximum of 44F. The low since midnight is 30F,
which is 2 degrees above the normal low of 28F.

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PRELIMINARY STATS FOR NOVEMBER 2022

TEMPERATURE, Deg. F
Avg. Max. 55.0 [+4.9] Avg. Min. 37.8 [+4.0] Mean      46.4 [+4.4] 24-hour corrected mean: 45.9

Max. for month: 75F on the 5th
Min. for month: 20F on the 21st

HEATING DEGREE DAYS
Total heating units:    556 [-136] Total for the season:   996 [-235] Total for last season: 1007

COOLING DEGREE DAYS
Total cooling units:    005 [+005] Total for the season:   889 [+212] Total for last season:  717

PRECIPITATION, Inches
Total: 3.39 [-0.92] Greatest in 24 hrs: 0.96 on the 30th

SNOWFALL, Inches
Total: TRACE [-1.8] Greatest in 24 hrs: TRACE on the 15th and 17th

WIND, mph
Avg. uncorrected wind speed: 13.3 mph
Avg. corrected wind speed:   13.6 mph
Prevailing wind direction:    SW [15%] Peak gust and direction:  63 SSE on the 30th

SUNSHINE:
Campbell-Stokes card minutes: 10710 of a possible 17010, or 63%
Astronomical total minutes: 11101 of a possible 17627, or 63%

MFD

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus
Temperature: 30F; Dew Point: 24F; Relative Humidity: 79%
Wind: WNW @ 9 kts
Sea-level pressure: 1020.0 mb; 30.12 in. Hg: rising, then
more rapidly
Visibility: 70 miles
6-hr Max temp: 37F
6-hr Min temp: 30F
24-hr Precip:  0.31 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 70 200/30/24/3009/012/ FEW SC ALQDS/ 8/500
53022 70031 10037 20030

10 A.M.
Weather: Clear, few stratocumulus and cirrus
Temperature: 37F; Dew Point: 23F; Relative Humidity: 56%
Wind: NW @ 7 kts
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: rising then
falling
Visibility: 80 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 80 196/37/23/3107/011/ FEW SC ALQDS FEW CI ALQDS/
8/502 55004

1 P.M.
Weather: Broken cirrostratus, few stratocumulus
Temperature: 40F, Dew point: 22F; Relative Humidity: 50%
Wind: N @ 7G13
Sea-level pressure: 1018.2 mb; 30.07 in Hg: falling, then
more slowly
Visibility: 90 miles, fog
6-hr Max temp: 41F
6-hr Min temp: 30F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 250 BKN 90 182/40/22/0107G13/007/ FEW SC ALQDS/ 8/508
56014 10041 20030

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SUMMARY FOR SATURDAY, DECEMBER 3, 2022

TEMPERATURE (DEGREES F)
MAX…….57   NORMAL…..44
MIN…….36   NORMAL…..28
MEAN……47   NORMAL…..36

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+11
TOTAL DEPARTURE FOR THE MONTH…………………+8 [+2.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………18  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH……………77  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………1046  DEPARTURE……-243
TOTAL HEATING UNITS LAST SEASON TO DATE…….1083  DEPARTURE…….-37

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….54 SSW @ 12:22 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..60     @ 12:22 P.M.
DAVIS #2 ………………57 S   @  1:14 P.M.
RMY #2 (Instantaneous)…..57 SSW @ 12:22 P.M.
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………………37 SSW @ 12:02 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..39     @ 12:03 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………38 SSW @ 12:03 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..40 SSW @ 12:03 P.M.
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…….23.5 SSW [565 total miles] VECTOR #2……………..23.3
DAVIS #2………………24.0 SSW
RMY #2………………..23.6 SW
RMY #1……….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……..0.31 DEPARTURE…..+0.14
TOTAL PRECIPITATION FOR THE MONTH…………..0.31 DEPARTURE…..-0.21
TOTAL PRECIPITATION FOR THE YEAR…………..37.38 DEPARTURE….-11.61

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…..TRACE DEPARTURE……-3.2

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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

11/1  61/54/58/+11/0.11/0.0/000/00        21 NW   AERO N/A    RMY 21
11/2  68/50/59/+12/0.00/0.0/598/97        29 N    AERO N/A    RMY 30
11/3  67/48/58/+12/0.00/0.0/597/97        24 WSW  AERO N/A    RMY 24
11/4  70/48/59/+13/0.00/0.0/411/67        38 WSW  AERO N/A    RMY 40
11/5  75/57/66/+20/0.00/0.0/336/55        35 SW   AERO N/A    RMY 36
11/6  74/63/69/+24/0.00/0.0/079/13        40 SW   AERO N/A    RMY 43
11/7  74/49/62/+17/T/0.0/448/74           38 NW   AERO N/A    RMY 42
11/8  53/35/44/-1/0.00/0.0/591/98         32 N    AERO N/A    RMY 32
11/9  52/30/41/-3/0.00/0.0/589/98         27 SW   AERO N/A    RMY 29
11/10 67/41/54/+10/0.00/0.0/586/98        35 WSW  AERO N/A    RMY 38
11/11 69/53/61/+18/0.50/0.0/036/06        56 SSW  AERO N/A    RMY 60
11/12 72/51/62/+19/0.24/0.0/398/67        47 SSW  AERO N/A    RMY 51
11/13 51/36/44/+1/0.08/0.0/000/00         41 NW   AERO N/A    RMY 43
11/14 42/28/35/-7/0.00/0.0/589/100        31 NW   AERO N/A    RMY 32
11/15 41/26/34/-8/0.03/T/423/72           16 NNW  AERO N/A    RMY 16
11/16 56/32/44/+2/0.84/0.0/059/10         40 NW   AERO N/A    RMY 40
11/17 44/32/38/-3/T/T/449/77              37 WNW  AERO N/A    RMY 34
11/18 44/28/36/-5/0.00/0.0/529/91         26 W    AERO N/A    RMY 28
11/19 43/26/35/-6/0.00/0.0/579/100        24 WSW  AERO N/A    RMY 24
11/20 37/25/31/-9/0.00/0.0/548/95         45 WNW  AERO N/A    RMY 48
11/21 37/20/29/-11/0.00/0.0/575/100       39 WNW  AERO N/A    RMY 40
11/22 48/31/40/0/0.00/0.0/574/100         30 WSW  AERO N/A    RMY 31
11/23 49/33/41/+2/0.00/0.0/440/77         28 NW   AERO N/A    RMY 28
11/24 47/29/38/-1/0.00/0.0/553/97         25 SW   AERO N/A    RMY 25
11/25 50/38/44/+5/0.01/0.0/000/00         43 WNW  AERO N/A    RMY 42
11/26 51/32/42/+4/0.00/0.0/567/100        43 NW   AERO N/A    RMY 41
11/27 56/42/49/+11/0.62/0.0/017/03        43 SSW  AERO N/A    RMY 47
11/28 54/33/44/+6/0.00/0.0/395/70         43 W    AERO N/A    RMY 43
11/29 41/28/35/-3/0.00/0.0/135/24         23 N    AERO N/A    RMY 21
11/30 57/36/47/+10/0.96/0.0/000/00        63 SSE  AERO N/A    RMY 68

DAILY RECORDS

11/05/2022: TIED RECORD HIGH MINIMUM OF 57F, ALSO SET IN 1948.

11/06/2022: NEW RECORD HIGH MINIMUM OF 63F,
PREVIOUS RECORD WAS 60F IN 2015
NEW RECORD HIGH MAXIMUM OF 74F,
PREVIOUS RECORD WAS 72F IN 2020

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/1  40/30/35/-2/0.00/0.0/…/..         54 NW   AERO N/A    RMY 60
12/2  44/27/36/-1/0.00/0.0/…/..         24 SSW  AERO N/A    RMY 25
12/3  57/36/47/+11/0.31/0.0/…/..        54 SSW  AERO N/A    RMY 57

12/4 The low since midnight is 30F, the daily normal low is 28F

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

RECORDS FOR DECEMBER 4
HIGH 67 IN 1998
LOW -4 IN 1940
PRECIP 1.87 INS. IN 1968
SNOWFALL 6.0 INS. IN 1907
PEAK GUST 73 MPH WNW IN 1980

RECORDS FOR DECEMBER 5
HIGH 65 IN 2001
LOW -1 IN 1926
PRECIP 2.86 INS. IN 1993
SNOWFALL 7.0 INS. IN 1893, 1895, 1926, 1981
PEAK GUST 67 MPH WNW IN 1961, S IN 1973

TODAY’S REPORT PREPARED BY: Benjamin Turner