Monday, December 5, 2022

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

MONDAY, DECEMBER 5, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0658E
SUNSET:  1612E

MILD, BUT BRISK WITH AN INCREASE IN CLOUD COVER….

We started the day with mainly clear skies, however high
thin cirrus clouds have been increasing as the day
progresses leaving us with filtered sunshine. Temperatures
have “warmed” nicely into the upper 40s despite the cold
start this morning with readings in the 20s and low 30s.

The wind has been on the brisk side, so despite the air
temperature being mild, the wind chill has been dipping
into the 30s, thus adding a chilly feel to the air.

Wind has been southerly averaging around 14mph. The peak
gust thus far has been 32mph occurring just after noon.

Visibility has been decent between 60-70 miles all day.

The high so far today is 48F, which is 5 degrees above
the normal maximum of 43F. The low since midnight is 29F,
which is 1 degree 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 offshore distant NE-ESE,
few cirrus distant NW-NE
Temperature: 32F; Dew Point: 22F; Relative Humidity: 66%
Wind: S @ 12G17 kts
Sea-level pressure: 1024.4 mb; 30.25 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 32F
6-hr Min temp: 29F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 60 244/32/22/1812G17/025/ FEW SC OFFSHR DSNT
NE-ESE FEW CI DSNT NW-NE/ 8/501 53013 10032 20029

10 A.M.
Weather: Clear, few stratocumulus distant SE-SSW, few cirrus
distant all quadrants
Temperature: 41F; Dew Point: 27F; Relative Humidity: 57%
Wind: S @ 16G23 kts
Sea-level pressure: 1025.8 mb; 30.29 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 70 258/41/27/1816G23/029/ FEW SC DSNT SE-SSW
FEW CI DSNT ALQDS/ 8/501 51014

1 P.M.
Weather: Thin Broken cirrus, few stratocumulus all quadrants
Temperature: 47F, Dew point: 30F; Relative Humidity: 51%
Wind: SSW @ 16G24 kts, peak wind SSW 32mph at 12:40 P.M.
Sea-level pressure: 1024.8 mb; 30.26 in Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 48F
6-hr Min temp: 32F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E250 -BKN 70 248/47/30/2016G24/026/ FEW SC ALQDS
PK WND 2028/04/ 8/501 58010 10048 20032

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SUMMARY FOR SUNDAY, DECEMBER 4, 2022

TEMPERATURE (DEGREES F)
MAX…….41   NORMAL…..44
MIN…….30   NORMAL…..28
MEAN……36   NORMAL…..36

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….0
TOTAL DEPARTURE FOR THE MONTH…………………+8 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………..106  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………1075  DEPARTURE……-243
TOTAL HEATING UNITS LAST SEASON TO DATE…….1116  DEPARTURE…….-41

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….39 WNW @ 12:16 A.M.
VECTOR #2 (Instantaneous)..42     @ 12:16 A.M.
DAVIS #2 ………………38 WNW @ 12:14 A.M.
RMY #2 (Instantaneous)…..41 WNW @ 12:16 A.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………………28 WNW @ 12:12 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28     @ 12:11 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 WNW @ 12:12 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 WNW @ 12:11 A.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……..9.4 WNW [225 total miles] VECTOR #2……………..10.1
DAVIS #2……………….9.9 NW
RMY #2………………..10.0 WNW
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……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.31 DEPARTURE…..-0.39
TOTAL PRECIPITATION FOR THE YEAR…………..37.38 DEPARTURE….-11.79

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.9
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…..TRACE DEPARTURE……-3.4

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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  41/30/36/0/0.00/0.0/…/..          39 WNW  AERO N/A    RMY 41

12/5 The low since midnight is 29F, 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 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

RECORDS FOR DECEMBER 6
HIGH 70 IN 2001
LOW 5 IN 1901,1935
PRECIP 2.78 INS. IN 2003
SNOWFALL 17.0 INS. IN 2003
PEAK GUST 74 MPH NW IN 1981

TODAY’S REPORT PREPARED BY: Matt Douglas