Friday, December 30, 2022

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

FRIDAY, DECEMBER 30, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET:  1621E

RECORD WARMTH TODAY UNDER A MIX OF SUN AND CLOUDS….

The temperature here at Blue Hill has reached 62F degrees
early this afternoon, which beats the old record of 60F set
in 1984. We may not yet have reached the high for the day,
so stay tuned.

A mix of sun and clouds have been the theme today with a
generally light west or southwesterly wind. The light wind
has really helped to make it feel quite nice outside.

The average wind speed for the day so far is around 12mph
with a peak gust so far of only 20mph.

Visibility has been limited all day, holding at around 40
miles.

The high so far today is 62F, which is 24 degrees above the
normal maximum of 37F. The low since midnight is 39F, which
is 18 degrees above the normal minimum of 21F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, thin smoke layer along horizon all
quadrants
Temperature: 43F; Dew Point: 32F; Relative Humidity: 64%
Wind: W @ 10 kts
Sea-level pressure: 1025.7 mb; 30.29 in. Hg: falling then rising
Visibility: 40 miles, hazy
6-hr Max temp: 43F
6-hr Min temp: 39F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E50 BKN 40 257/43/32/2610/029/ THN K LYR ALNG HRZN ALQDS
HAZY/ 8/500 53003 10043 20039

10 A.M.
Weather: Thin scattered cirrus, few stratocumulus all quadrants,
thin smoke layer along horizon all quadrants
Temperature: 49F; Dew Point: 34F; Relative Humidity: 55%
Wind: W @ 7 kts
Sea-level pressure: 1025.6 mb; 30.29 in. Hg: steady, then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 -SCT 40 256/49/34/2607/029/ FEW SC ALQDS THN K LYR ALNG
HRZN ALQDS HAZY/ 8/501 58001

1 P.M.
Weather: Scattered stratocumulus, thin broken cirrus
Temperature: 59F; Dew Point: 33F; Relative Humidity: 37%
Wind: SW @ 8 kts
Sea-level pressure: 1023.4 mb; 30.22 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 43F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 50 SCT E250 -BKN 40 234/59/33/2208/022/ HAZY/ 8/501 58022
10060 20043

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SUMMARY FOR THURSDAY, DECEMBER 29, 2022

TEMPERATURE (DEGREES F)
MAX…….54   NORMAL…..37
MIN…….33   NORMAL…..21
MEAN……44   NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….+15
TOTAL DEPARTURE FOR THE MONTH……………….+22 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE…….-15
TOTAL HEATING UNITS FOR THE MONTH…………..911  DEPARTURE…….-23
TOTAL HEATING UNITS FOR THE SEASON…………1880  DEPARTURE……-258
TOTAL HEATING UNITS LAST SEASON TO DATE…….1835  DEPARTURE…….+45

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….27 SW  @  3:41 P.M.
VECTOR #2 (Instantaneous)..28     @  3:13 P.M.
DAVIS #2 ………………28 S   @  2:57 P.M.
RMY #2 (Instantaneous)…..28 SW  @  3:41 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………………19 SW  @  3:42 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20     @  3:41 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 SW  @  3:44 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SW  @  3:41 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…….12.1 WSW [290 total miles] VECTOR #2……………..13.0
DAVIS #2………………13.0 SW
RMY #2………………..13.2 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…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..5.51 DEPARTURE…..+0.44
TOTAL PRECIPITATION FOR THE YEAR…………..42.58 DEPARTURE….-10.96

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……-8.8
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….2.7 DEPARTURE…..-11.3

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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/0.1/546/100           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 54/33/44/+15/0.00/0.0/…/..        27 SW   AERO N/A    RMY 28

12/30 The low since midnight is 39F, 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 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 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

RECORDS FOR DECEMBER 31
HIGH 62 IN 1965
LOW -12 IN 1917
PRECIP 0.96 INS. IN 1906
SNOWFALL 7.5 INS. IN 2008
PEAK GUST 78 MPH NW IN 1990

TODAY’S REPORT PREPARED BY: Matt Douglas