Monday, January 15, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JANUARY 15, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0711E
SUNSET: 1636E
MAINLY SUNNY SKIES, BUT COLD AFTER AN ARCTIC FRONTAL PASSAGE LATE
YESTERDAY AFTERNOON….
There has been an abundance of sunshine today, but with an arctic
air mass in place, it’s on the cold side. As the arctic front
blew through yesterday afternoon, snow showers and squalls moved
through, leaving 0.4″ of snow on the summit as well as a wind
gust to 53mph!
The temperature today has barely made it to 30F (29.5F) through
1pm. The dew point has been holding in the upper single digits,
very indicative of the arctic origin of the air mass.
The wind has been steady, but not nearly as strong as yesterday.
The speeds have generally been around 10mph on average out of
mainly a westerly direction.
Visibility has been decent today with a view of 50-60 miles.
The maximum temperature so far today is 30F degrees, this is 4
degrees below the normal high of 34F. The minimum temperature
so far since midnight is 17F degrees, this is 1 degree below
the normal low of 18F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-ESE,
few altocumulus distant E-S-SW
Temperature: 18F; Dew Point: 7F; Relative Humidity: 63%
Wind: WNW @ 9 kts
Sea-level pressure: 1022.3 mb; 30.19 in. Hg: rising, then more rapidly
Visibility: 50 miles
6-hr Max temp: 22F
6-hr Min temp: 18F
24-hr Precip: 0.02 inches
24-hr Snowfall: 0.4 inches
Snow Depth: Trace
BHO SA 1155 CLR 50 223/18/7/2909/019/ FEW SC OFFSHR DSNT NE-ESE FEW AC
DSNT E-S-SW TOTAL NEW SNW PST 24 HRS 0.4 INS/ 8/550 4/000 53014 70002
10022 20018
10 A.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 23F; Dew Point: 9F; Relative Humidity: 54%
Wind: W @ 7 kts
Sea-level pressure: 1023.7 mb; 30.32 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 60 237/23/9/2607/032/ FEW AC ALQDS/ 8/050 51014
1 P.M.
Weather: Scattered cirrus, few altocumulus all quadrants
Temperature: 28F; Dew Point: 9F; Relative Humidity: 45%
Wind: WSW @ 8 kts
Sea-level pressure: 1022.2 mb; 30.19 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 30F
6-hr Min temp: 17F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 250 SCT 60 222/28/9/2408/019/ FEW AC ALQDS/ 8/054 4/000
58015 10030 20017
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SUMMARY FOR SUNDAY, JANUARY 14, 2024
TEMPERATURE (DEGREES F)
MAX…….39 NORMAL…..34
MIN…….22 NORMAL…..18
MEAN……31 NORMAL…..26
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………+5
TOTAL DEPARTURE FOR THE MONTH…………………..+87 [+6.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………34 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH…………..440 DEPARTURE…….-88
TOTAL HEATING UNITS FOR THE SEASON…………2335 DEPARTURE……-403
TOTAL HEATING UNITS LAST SEASON TO DATE…….2306 DEPARTURE…….+29
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E53 WNW @ 04:54 P.M.
VECTOR #1 (1-Sec)……….52 WNW @ 04:56 P.M.
VECTOR #2 (1-Sec)……….59 WNW @ 04:54 P.M.
DAVIS #1……………….50 WNW @ 04:54 P.M.
DAVIS #2 ………………55 WNW @ 04:54 P.M.
RMY #1 (Instantaneous)…..54 WNW @ 04:52 P.M.
RMY #2 (Instantaneous)…..60 WNW @ 04:54 P.M.
MERLIN…………………45 WNW
RICHARDS (C5C) (Inst)……56 @ 04:54 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………40 W @ 05:22 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..38 @ 04:56 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..43 @ 04:56 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………41 W @ 04:56 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………43 WNW @ 04:56 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..36 WNW @ 04:55 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..42 WNW @ 04:56 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………38 @ 04:56 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……19.0 SW [457 total miles]
VECTOR #1…………….18.2
VECTOR #2…………….19.2
DAVIS #1……………..18.7 WSW
DAVIS #2……………..19.4 W
RMY #1……………….17.7 WSW
RMY #2……………….18.9 WSW
RICHARDS (C5C)………..17.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..6.29 DEPARTURE…..+4.18
TOTAL PRECIPITATION FOR THE YEAR (2024)……..6.29 DEPARTURE…..+4.18
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.4 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH……………….13.6 DEPARTURE……+5.7
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……13.9 DEPARTURE……-9.1
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PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
1/1 37/25/31/+2/0.00/0.0/296/54 15 N VEC1 14 N RMY 15
1/2 39/19/29/+1/0.00/0.0/550/100 17 WNW VEC1 17 WNW RMY 17
1/3 42/25/34/+6/0.00/0.0/347/63 20 WNW VEC1 21 WNW RMY 21
1/4 42/21/32/+4/T/T/237/43 37 NNW VEC1 36 NNW RMY 39
1/5 32/17/25/-3/0.00/0.0/542/98 40 NW VEC1 39 NW RMY 39
1/6 34/24/29/+1/0.11/0.2/022/04 36 E VEC1 36 E RMY 36
1/7 33/21/27/0/0.84/13.0/000/00 38 ENE VEC1 37 ENE RMY 42
1/8 32/21/27/0/0.00/0.0/406/73 28 NW VEC1 28 NW RMY 31
1/9 40/23/32/+5/0.98/T/000/00 46 SE VEC1 49 SE RMY 46
1/10 53/41/47/+20/1.90/0.0/201/36 70 SSE VEC1 69 SSE RMY 75
1/11 43/35/39/+12/0.00/0.0/…/.. 45 WNW VEC1 43 WNW RMY 47
1/12 47/33/40/+13/0.00/0.0/…/.. 29 SE VEC1 28 ESE RMY 28
1/13 57/36/47/+21/1.72/0.0/…/.. 47 ESE VEC1 51 ESE RMY 49
1/14 39/22/31/+5/0.02/0.4/…/.. 53 WNW VEC1 52 WNW RMY 54
1/15 The low since midnight is 17F, the daily normal low is 18F
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JANUARY DAILY RECORDS TO DATE
1/13: RECORD PRECIPITATION OF 1.72 INS,
BEATS PREVIOUS RECORD OF 1.54 INS SET IN 1979
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JANUARY 15
HIGH 64F IN 1995
LOW -16F IN 1957 [RECORD LOW FOR MONTH]
PRECIP 2.63 INS. IN 1958
SNOWFALL 8.8 INS. IN 1983
PEAK GUST 69e MPH SE IN 1940
RECORDS FOR JANUARY 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960
TODAY’S REPORT PREPARED BY: Matt Douglas
