Saturday, December 24, 2022

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

SATURDAY, DECEMBER 24, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0711E
SUNSET:  1616E

A COMPLETE CONTRAST TO YESTERDAY FOLLOWING NOTABLE RAIN
AND WIND….

Rainfall from yesterday’s event totaled 1.65 inches, but
even more notable was the wind. Speeds were 30 mph on average
with a max gust of 74 mph from the south east. We had a
very high average wind speed from 8 A.M. to 9 A.M. yesterday
of 41 mph. This is 3 mph below the hourly average high speed
of 44 mph from the 1978 blizzard!

Today is a crazy contrast with frigid temperatures and
clear skies, but a limited visibility of 40 miles on
average due to haze. Wind is around 15 mph on average
from the southwest with a max gust of 35 earlier this morning.

The high so far today is only 17F, which is 21 degrees below the
normal maximum of 38F. The low since midnight is 6F, which
is 17 degrees below the normal minimum of 23F.

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus in the distance
Temperature: 6F; Dew Point: -2F; Relative Humidity: 68%
Wind: WSW @ 14G24 kts
Sea-level pressure: 1002.8 mb; 29.61 in. Hg: rising unsteadily
Visibility: 20 miles, haze
6-hr Max temp: 13F
6-hr Min temp: 6F
24-hr Precip:  0.53 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 20 028/6/-2/2514G24/961/ FEW SC DSNT ALQDS
HAZY/ 8/500 52026 70053 10013 20006

10 A.M.
Weather: Clear, few stratocumulus in the distance
Temperature: 12F; Dew Point: -2F; Relative Humidity: 54%
Wind: WSW @ 14G19 kts
Sea-level pressure: 1005.5 mb; 29.70 in. Hg: rising, then
more slowly
Visibility: 40 miles, haze
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 40 055/12/-2/2514G19/970/ FEW SC DSNT ALQDS
HAZY/ 8/500 51027

1 P.M.
Weather: Clear, few stratocumulus in the distance
Temperature: 16F, Dew point: 2F; Relative Humidity: 54%
Wind: W @ 11G18 kts
Sea-level pressure: 1004.5 mb; 29.67 in Hg: falling, then
more rapidly
Visibility: 35 miles, haze
6-hr Max temp: 16F
6-hr Min temp: 6F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 35 045/16/2/2711G18/967/ FEW SC DSNT ALQDS
HAZY/ 8/500 58010 10016 20006

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SUMMARY FOR FRIDAY, DECEMBER 23, 2022

TEMPERATURE (DEGREES F)
MAX…….55   NORMAL…..38
MIN…….15   NORMAL…..23
MEAN……35   NORMAL…..31

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+4
TOTAL DEPARTURE FOR THE MONTH………………..+44 [+1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………30  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..677  DEPARTURE…….-45
TOTAL HEATING UNITS FOR THE SEASON…………1646  DEPARTURE……-280
TOTAL HEATING UNITS LAST SEASON TO DATE…….1634  DEPARTURE…….+12

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….74 SE  @  8:01 P.M.
VECTOR #2 (Instantaneous)..84     @  8:01 P.M.
DAVIS #2 ………………71 SE  @  8:01 P.M.
RMY #2 (Instantaneous)…..78 SE  @  8:01 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………………49 SE  @  8:02 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..50     @  8:03 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………50 SE  @  8:03 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..51 SE  @  8:04 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…….30.9 S [741 total miles] VECTOR #2……………..29.7
DAVIS #2………………29.5 S
RMY #2………………..29.6 S
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……..0.53 DEPARTURE…..+0.36
TOTAL PRECIPITATION FOR THE MONTH…………..5.51 DEPARTURE…..+1.42
TOTAL PRECIPITATION FOR THE YEAR…………..42.58 DEPARTURE…..-9.98

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..2.7 DEPARTURE……-5.8
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.7 DEPARTURE……-8.3

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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/-2/0.00/0.0/520/93         54 NW   AERO N/A    RMY 60
12/2  44/27/36/-1/0.00/0.0/535/96         24 SSW  AERO N/A    RMY 25
12/3  57/36/47/+11/0.31/0.0/000/00        54 SSW  AERO N/A    RMY 57
12/4  41/30/36/0/0.00/0.0/355/64          39 WNW  AERO N/A    RMY 41
12/5  48/29/39/+3/0.00/0.0/454/82         32 SSW  AERO N/A    RMY 32
12/6  54/38/46/+11/0.09/0.0/000/00        30 SSE  AERO N/A    RMY 31
12/7  56/46/51/+16/0.85/0.0/000/00        39 SSE  AERO N/A    RMY 39
12/8  53/33/43/+8/0.00/0.0/534/97         36 NNW  AERO N/A    RMY 39
12/9  44/29/37/+3/0.00/0.0/549/100        29 N    AERO N/A    RMY 30
12/10 31/27/29/-5/0.04/0.4/000/00         27 NE   AERO N/A    RMY 26
12/11 30/23/27/-7/0.15/2.1/000/00         25 NNE  AERO N/A    RMY 26
12/12 29/21/25/-9/T/T/395/72              24 N    AERO N/A    RMY 24
12/13 38/19/29/-4/0.00/0.0/547/100        38 NNW  AERO N/A    RMY 38
12/14 35/18/27/-6/T/0.1/…/..            42 NNW  AERO N/A    RMY 44
12/15 40/30/35/+2/0.09/0.0/…/..         40 E    AERO N/A    RMY 41
12/16 42/39/41/+9/1.88/0.0/…/..         47 E    AERO N/A    RMY 48
12/17 42/31/37/+5/0.45/0.1/…/..         37 WNW  AERO N/A    RMY 38
12/18 39/27/33/+1/0.00/0.0/…/..         29 NW   AERO N/A    RMY 28
12/19 39/25/32/0/0.00/0.0/…/..          41 WNW  AERO N/A    RMY 41
12/20 38/25/32/+1/0.00/0.0/…/..         34 NW   AERO N/A    RMY 35
12/21 37/22/30/-1/0.00/0.0/…/..         17 N    AERO N/A    RMY 17
12/22 43/28/36/+5/…./0.0/…/..         44 E    AERO N/A    RMY 45
12/23 55/15/35/+4/…./0.0/…/..         74 SE   AERO N/A    RMY 74

12/24 The low since midnight is 6F, the daily normal low is 23F

DAILY RECORDS

12/16/2022: NEW PRECIPITATION RECORD OF 1.88 INS,
THIS BEATS THE OLD RECORD OF 1.67 INS SET IN 1960

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

RECORDS FOR DECEMBER 24
HIGH 67 IN 2015
LOW -6 IN 1943
PRECIP 2.21 INS. IN 1994
SNOWFALL 12.3 INS. IN 1961
PEAK GUST 79e MPH SE IN 1941

RECORDS FOR DECEMBER 25
HIGH 64 IN 2015
LOW -11 IN 1980
PRECIP 2.15 INS. IN 2020
SNOWFALL 8.5 INS. IN 2002
PEAK GUST 80 MPH NW IN 1971

TODAY’S REPORT PREPARED BY: Benjamin Turner