Friday, December 6, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, DECEMBER 6, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0659E
SUNSET: 1612E
WINDY CONDITIONS AND BELOW AVERAGE TEMPS MAKE FOR A BLUSTERY
DAY ON BLUE HILL TODAY….
Yesterday’s observed precipitation moved out from our area by
the evening hours and was replaced with a dry air mass and below
average temperatures. The 3″ of snow we received put us above
for the month, but we are still in a deficit of liquid precipitation
-0.36 for the month and -1.36 for the year.
This morning’s recorded low of 25F has only seen a mild improvement,
even with the sun out for much of the day. The windy conditions and
cold advection is definitely playing a role in suppressing the
temperatures for today. By the final observation we had only made it
to 30F.
The wind has been a dominant force today, with an impressive average
around 17mph. The wind had picked up last night around 6pm with a shift
to the WNW and with averages over 20mph during the overnight hours. We
had some “slow” periods during the early morning hours, however, the
last few hours we are around the 18-20mph average mark. The peak gust
for the day so far is 39mph, which occurred at 12:21am this morning.
Visibility was around 40 miles this morning but improved to 70 miles
during the mid morning and afternoon.
The maximum temperature for today is 30F degrees, which is 13 degrees
below the normal high of 43F. The minimum temperature since midnight
is 25F degrees, which is 3 degrees below the normal low of 28F.
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Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, thinly scattered altocumulus
Temperature: 26F; Dew Point: 18F; Relative Humidity: 73%
Wind: WNW @ 13G20 kts
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: rising unsteadily
Visibility: 40 miles
6-hr Max temp: 30F
6-hr Min temp: 26F
24-hr Precip: 0.10 inches
24-hr Snowfall: 1.2 inches
Snow Depth: 1 inch
BHO SA 1155 40 SCT 250 -SCT 40 109/26/18/2913G20/985/ 8/550 4/001 52036
70010 10030 20026
10 A.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus all quadrants
Temperature: 28F; Dew Point: 12F; Relative Humidity: 48%
Wind: WNW @ 18G24 kts, peak wind WNW 37mph at 9:09 A.M.
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: rising unsteadily
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 60 139/28/12/3018G24/994/ PK WND 2932/09/ FEW SC ALQDS
FEW CI ALQDS/ 8/501 52030
1 P.M.
Weather: Few stratocumulus all quadrants, few cirrus WSW-W-N
Temperature: 29F; Dew Point: 12F; Relative Humidity: 48%
Wind: NW @ 13G22 kts
Sea-level pressure: 1007.9 mb; 29.76 in. Hg: falling, then rising
Visibility: 70 miles
6-hr Max temp: 30F
6-hr Min temp: 26F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 1 inch
BHO SA 1755 079/29/12/3113G22/976/ FEW SC ALQDS FEW CI WSW-W-N/ 8/501
4/001 55000 10030 20026
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SUMMARY FOR THURSDAY, DECEMBER 5, 2024
TEMPERATURE (DEGREES F)
MAX…….37 NORMAL…..43
MIN…….31 NORMAL…..28
MEAN……34 NORMAL…..36
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-2
TOTAL DEPARTURE FOR THE MONTH…………………….-29 [-5.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………31 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..172 DEPARTURE…….+28
TOTAL HEATING UNITS FOR THE SEASON…………1115 DEPARTURE……-233
TOTAL HEATING UNITS LAST SEASON TO DATE…….1202 DEPARTURE…….-87
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)………..43 WNW @ 07:51 P.M.
VECTOR #1 (1-Sec)……….43 WNW @ 07:51 P.M.
VECTOR #2 (1-Sec)……….43 WNW @ 07:51 P.M.
DAVIS #1……………….42 W @ 11:41 P.M.
DAVIS #2 ………………41 WNW @ 07:51 P.M.
RMY #1 (Instantaneous)…..47 WNW @ 07:51 P.M.
RMY #2 (Instantaneous)…..47 WNW @ 07:51 P.M.
MERLIN…………………40 WNW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………29 WNW @ 11:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..28 @ 11:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30 @ 07:52 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………30 W @ 11:26 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 WNW @ 07:52 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 WNW @ 11:26 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 WNW @ 07:52 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..14.9 SW [358 total miles]
VECTOR #1………………14.4
VECTOR #2………………15.0
DAVIS #1……………….14.6 WSW
DAVIS #2……………….14.8 W
RMY #1…………………14.6 WSW
RMY #2…………………15.5 WSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.10 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..0.53 DEPARTURE…..-0.36
TOTAL PRECIPITATION FOR THE YEAR (2024)…….48.00 DEPARTURE…..-1.36
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..1.2 DEPARTURE……+0.9
TOTAL SNOWFALL FOR THE MONTH………………..3.0 DEPARTURE……+1.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….3.0 DEPARTURE……-0.7
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PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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
12/1 37/23/30/-7/0.00/0.0/452/81 21 WSW VEC1 21 WSW RMY 21
12/2 38/22/30/-7/0.00/0.0/551/99 18 W VEC1 18 W RMY 18
12/3 36/20/28/-8/0.00/0.0/411/74 21 NW VEC1 21 WNW RMY 21
12/4 39/22/31/-5/0.13/T/394/71 30 S VEC1 31 S RMY 33
12/5 37/31/34/-2/0.10/3.0/…/.. 43 WNW VEC1 43 WNW RMY 47
12/6 The low since midnight is 25F, the daily normal low is 28F.
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DECEMBER DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 6
HIGH 70 IN 2001
LOW 5 IN 1901,1935
PRECIP 2.78 INS. IN 2003
SNOWFALL 17.0 INS. IN 2003
PEAK GUST 74 MPH NW IN 1981
RECORDS FOR DECEMBER 7
HIGH 74 IN 1998
LOW 6 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 6.3 INS. IN 2003
PEAK GUST 76e SE IN 1976
TODAY’S REPORT PREPARED BY: Amanda Joly
