Thursday, December 29, 2022

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

THURSDAY, DECEMBER 29, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET:  1620E

MORNING CLOUD COVER DECREASES THIS AFTERNOON, QUITE MILD….

A lot of high cloudiness this morning was enough to limit
sunshine, however clouds have been thinning and decreasing
as we progress into the afternoon, allowing for an increase
in sunshine. Temperatures have responded nicely with readings
getting into the mid 50s this afternoon.

The average wind speed for the day so far is around 12mph
with a peak gust so far of 25mph.

Visibility has been limited all day, only ranging 25-40 miles.

The high so far today is 54F, which is 17 degrees above the
normal maximum of 37F. The low since midnight is 33F, which
is 12 degrees above the normal minimum of 21F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken cirrus
Temperature: 35F; Dew Point: 27F; Relative Humidity: 72%
Wind: WSW @ 12 kts
Sea-level pressure: 1026.0 mb; 30.30 in. Hg: rising, then more rapidly
Visibility: 25 miles, hazy
6-hr Max temp: 35F
6-hr Min temp: 34F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E250 BKN 25 260/35/27/2412/030/ HAZY/ 8/004 53006
10035 20034

10 A.M.
Weather: Broken cirrus
Temperature: 38F; Dew Point: 27F; Relative Humidity: 64%
Wind: WSW @ 7 kts
Sea-level pressure: 1027.1 mb; 30.33 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E250 BKN 40 271/38/27/2407/033/ HAZY/ 8/004 50011

1 P.M.
Weather: Thin scattered cirrus
Temperature: 51F; Dew Point: 29F; Relative Humidity: 42%
Wind: WSW @ 8 kts
Sea-level pressure: 1024.3 mb; 30.25 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 52F
6-hr Min temp: 33F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 250 -SCT 40 243/51/29/2408/025/ HAZY/ 8/001 58028
10052 20033

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SUMMARY FOR WEDNESDAY, DECEMBER 28, 2022

TEMPERATURE (DEGREES F)
MAX…….40   NORMAL…..37
MIN…….22   NORMAL…..22
MEAN……31   NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+2
TOTAL DEPARTURE FOR THE MONTH………………..+7 [+0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………34  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..890  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………1859  DEPARTURE……-243
TOTAL HEATING UNITS LAST SEASON TO DATE…….1806  DEPARTURE…….+53

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….35 SSW @ 12:02 P.M.
VECTOR #2 (Instantaneous)..35     @ 12:02 P.M.
DAVIS #2 ………………31 S   @ 12:00 P.M.
RMY #2 (Instantaneous)…..36 SSW @ 12:02 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………………24 SSW @ 12:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23     @ 11:55 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 SW  @  2:29 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SSW @ 11:55 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…….11.8 SW [282 total miles] VECTOR #2……………..12.5
DAVIS #2………………12.2 SW
RMY #2………………..12.7 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……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..5.51 DEPARTURE…..+0.60
TOTAL PRECIPITATION FOR THE YEAR…………..42.58 DEPARTURE….-10.80

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……-8.3
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.7 DEPARTURE…..-10.8

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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/0.1/546/100           42 NNW  AERO N/A    RMY 44
12/15 40/30/35/+2/0.09/0.0/000/00         40 E    AERO N/A    RMY 41
12/16 42/39/41/+9/1.88/0.0/000/00         47 E    AERO N/A    RMY 48
12/17 42/31/37/+5/0.45/0.1/044/08         37 WNW  AERO N/A    RMY 38
12/18 39/27/33/+1/0.00/0.0/365/67         29 NW   AERO N/A    RMY 28
12/19 39/25/32/0/0.00/0.0/469/86          41 WNW  AERO N/A    RMY 41
12/20 38/25/32/+1/0.00/0.0/544/100        34 NW   AERO N/A    RMY 35
12/21 37/22/30/-1/0.00/0.0/496/91         17 N    AERO N/A    RMY 17
12/22 43/28/36/+5/0.28/0.0/038/07         44 E    AERO N/A    RMY 45
12/23 55/15/35/+4/1.37/T/000/00           74 SE   AERO N/A    RMY 74
12/24 17/6/12/-18/0.00/0.0/529/97         37 WSW  AERO N/A    RMY 39
12/25 25/9/17/-13/0.00/0.0/540/99         29 WSW  AERO N/A    RMY 31
12/26 32/15/24/-6/0.00/0.0/519/95         23 WSW  AERO N/A    RMY 23
12/27 34/22/28/-2/0.00/0.0/246/45         23 WNW  AERO N/A    RMY 22
12/28 40/22/31/+2/0.00/0.0/…/..         35 SSW  AERO N/A    RMY 36

12/29 The low since midnight is 33F, the daily normal low is 21F

DAILY RECORDS

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

12/23/2022: NEW PEAK GUST RECORD 74 MPH SE,
REPLACING THE OLD RECORD OF 67 SSE IN 2004

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

RECORDS FOR DECEMBER 29
HIGH 72 IN 1984
LOW -19 IN 1933 (RECORD FOR DECEMBER)
PRECIP 1.89 INS. IN 1945
SNOWFALL 18.4 INS. IN 1945
PEAK GUST 95 MPH S IN 1966 (RECORD FOR DECEMBER)

RECORDS FOR DECEMBER 30
HIGH 60 IN 1984
LOW -18 IN 1933
PRECIP 1.54 INS. IN 1942
SNOWFALL 7.5 INS. IN 1956
PEAK GUST 81 MPH WNW IN 1962

TODAY’S REPORT PREPARED BY: Matt Douglas