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Wednesday, December 14, 2022

December 14, 2022

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, DECEMBER 14, 2022 ALL TIMES ARE…

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

WEDNESDAY, DECEMBER 14, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0706E
SUNSET:  1612E

WINDY AND COLD WITH PLENTY OF SUNSHINE….

A cold front pressed southward overnight bringing with it
gusty winds and snow squalls between midnight and 3am.
Snow amounted to 0.1″ here on the summit melting down to
only a trace of liquid. Wind gusts in excess of 40mph
accompanied the squalls as the front moved through. A
marked drop in temperature from 27F at 2am to 18F by 7am
was noted along with the dew point dropping into the
single digits early this morning. All told it certainly
felt like mid January!

Clear skies and abundant sunshine have been the theme
today, despite this, temperatures have only recovered
to the mid 30s. With a biting northwest to north-northwest
wind, wind chills are solidly in the upper teens to low
20s.

We had our coldest temperature of the season so far this
morning with a low of 18F!

The dew point has been gradually rising from the single
digits early this morning to 20 early this afternoon.

The wind as mentioned has been on the busy side with an
average speed for the day thus far around 18mph. Gusts
have been frequently getting to between 35-40mph most of
the day.

Visibility is excellent today under almost completely
clear skies. Views of 80 miles early this morning have
increased to a perfect 90 miles early this afternoon.

The high so far today is 34F, which is 7 degrees below
the normal maximum of 41F. The low since midnight is 18F,
which is 7 degrees below the normal minimum of 25F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus offshore distant NNE-SE-S
Temperature: 19F; Dew Point: 7F; Relative Humidity: 59%
Wind: NNW @ 16G29 kts, peak wind NNW 39mph at 6:09 A.M.
Sea-level pressure: 1014.3 mb; 29.95 in. Hg: falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 27F
6-hr Min temp: 18F
24-hr Precip:  Trace
24-hr Snowfall: Trace
Snow Depth: 1 inch
BHO SA 1155 CLR 80 143/19/7/3316G29/995/ FEW SC OFFSHR DSNT
NNE-SE-S PK WND 3334/09/ NEW SNW PST 24 HRS TRACE/ 8/500 4/001
51005 6000/ 70000 10027 20018

10 A.M.
Weather: Clear, few stratocumulus distant W-N and NNE-SE-S,
few cirrus distant WSW-W
Temperature: 25F; Dew Point: 13F; Relative Humidity: 60%
Wind: NW @ 17G27 kts, peak wind NW 37mph at 9:38 A.M.
Sea-level pressure: 1014.6 mb; 30.19 in. Hg: rising then steady
Visibility: 90 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 90 146/25/13/3217G27/996/ FEW SC DSNT W-N AND
NNE-SE-S FEW CI DSNT WSW-W PK WND 3232/38/ 8/501 51003

1 P.M.
Weather: Clear, few stratocumulus distant WNW-NNW and distant
NNE-SE, few altocumulus distant NNE-E, few cirrus distant SSW-NNW
Temperature: 33F, Dew point: 20F; Relative Humidity: 59%
Wind: NNW @ 16G29 kts, peak wind NNW 39mph at 12:43 P.M.
Sea-level pressure: 1013.2 mb; 29.92 in Hg: falling, then more slowly
Visibility: 90 miles
6-hr Max temp: 34F
6-hr Min temp: 19F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 1 inch
BHO SA 1755 CLR 90 132/33/20/3316G29/992/ FEW SC DSNT WNW-NNW AND
DSNT NNE-SE FEW AC DSNT NNE-E FEW CI DSNT SSW-NNW PK WND 3334/43/
8/571 4/001 56014 10034 20019

————————————————————–

SUMMARY FOR TUESDAY, DECEMBER 13, 2022

TEMPERATURE (DEGREES F)
MAX…….38   NORMAL…..41
MIN…….19   NORMAL…..26
MEAN……29   NORMAL…..33

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-4
TOTAL DEPARTURE FOR THE MONTH………………..+24 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………36  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..365  DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………1334  DEPARTURE……-260
TOTAL HEATING UNITS LAST SEASON TO DATE…….1346  DEPARTURE…….-12

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….38 NNW @  1:57 P.M.
VECTOR #2 (Instantaneous)..40     @  1:57 P.M.
DAVIS #2 ………………33 NNW @  1:27 P.M.
RMY #2 (Instantaneous)…..38 NNW @  1:57 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………………26 NNW @  2:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22     @  1:27 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NNW @  1:27 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 NNW @  1:27 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…….13.9 NNW [333 total miles] VECTOR #2……………..14.5
DAVIS #2………………14.2 NW
RMY #2………………..14.2 NW
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…….TRACE DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..1.44 DEPARTURE…..-0.89
TOTAL PRECIPITATION FOR THE YEAR…………..38.51 DEPARTURE….-12.29

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.1 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………..2.6 DEPARTURE……-1.5
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.6 DEPARTURE……-4.0

————————————————————–

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 The low since midnight is 18F, the daily normal low is 25F

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

RECORDS FOR DECEMBER 14
HIGH 62 IN 1901
LOW -6 IN 1893
PRECIP 1.94 INS. IN 2002
SNOWFALL 8.0 INS. IN 1907
PEAK GUST 78e ENE IN 1941

RECORDS FOR DECEMBER 15
HIGH 64 IN 1975
LOW 4 IN 1900, 1905, 1933
PRECIP 1.80 INS. IN 1981
SNOW 7.5 INS. IN 1951
PEAK GUST 65 MPH NW IN 1991

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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