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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, DECEMBER 11, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0704E
SUNSET: 1612E
STORMY DAY IN PROGRESS ON BLUE HILL WITH PERIODS OF RAIN AND STRONG
WINDS….
Freezing drizzle last evening finally became just plain drizzle
between 9-10pm last night as the temperature finally rose above the
freezing mark. Drizzle became rain by 1am, and has continued at
varying intensities since. 0.14″ of rain fell overnight into early
this morning, with an additional 0.55″ falling between 7am and 1pm
today. heavier rain is currently approaching the area and will be
falling here through the afternoon.
Temperatures have warmed considerably today with values in the upper
50s by early this afternoon. The dew point is matching the air
temperature, so the air is of course saturated.
Winds have been increasing through the morning and into early this
afternoon. Speeds are sustained over 30mph at the 1pm observation
with gusts near 50mph. The average speed for the day so far is around
16mph. The peak gust so far occurred just after the 1pm observation
at a value of 51mph. Gusts are expected to exceed 60mph here on the
summit later this afternoon, and especially during the evening hours.
Visibility was greatly limited this morning with only 1/16th of a
mile being observed. However, as the cloud deck raised, the view has
improved to around 12 miles at the 1pm observation, but it has varied
due to periods of rain, down to 2-3 miles at times.
The maximum temperature for today is 59F degrees, which is 18 degrees
above the normal high of 41F. The minimum temperature since midnight
is 36F degrees, which is 10 degrees above the normal low of 26F.
We will be watching for some possible records for today. The records
that may be close to tying or broken are..
Maximum Temperature; record value is 63F set in 1911
Precipitation; record value is 2.36″ set in 1992
Peak Gust; record value is 78mph S set in 1969
Stay tuned!
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 100ft, light rain
Temperature: 45F; Dew Point: 45F; Relative Humidity: 100%
Wind: S @ 16G23 kts
Sea-level pressure: 1013.3 mb; 29.92 in. Hg: falling unsteadily
Visibility: 1/16 mile, fog
6-hr Max temp: 45F
6-hr Min temp: 38F
24-hr Precip: 0.14 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W1 1/16R-F 133/45/45/1916G23/992/ R-B25/ 8//// 57015
6012/ 70014 10045 20038
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light rain
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: SSE @ 18G28 kts, peak wind SSE 32mph at 9:47 A.M.
Sea-level pressure: 1011.1 mb; 29.86 in. Hg: steady, then falling
Visibility: 1/16 mile, fog
3-hr Precip: 0.25 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 X W2 1/16R-F 111/52/52/1618G28/986/ PK WND 1628/47/
8//// 58022 6025/
1 P.M.
Weather: Overcast stratocumulus, light rain
Temperature: 59F; Dew Point: 59F; Relative Humidity: 100%
Wind: SSW @ 27G42 kts, peak wind S 50mph at 12:36 P.M.
Sea-level pressure: 1005.1 mb; 29.68 in. Hg: falling, then more rapidly
Visibility: 12 miles, thin fog
6-hr Max temp: 59F
6-hr Min temp: 42F
6-hr Precip: 0.55 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E12 OVC 12R- 051/59/59/2027G42/968/ THN F ALQDS
PK WND 1943/36/ 8/5// 58060 6055/ 10059 20042
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SUMMARY FOR TUESDAY, DECEMBER 10, 2024
TEMPERATURE (DEGREES F)
MAX…….42 NORMAL…..42
MIN…….31 NORMAL…..27
MEAN……37 NORMAL…..34
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+3
TOTAL DEPARTURE FOR THE MONTH…………………….-29 [-3.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………28 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..324 DEPARTURE…….+29
TOTAL HEATING UNITS FOR THE SEASON…………1267 DEPARTURE……-232
TOTAL HEATING UNITS LAST SEASON TO DATE…….1348 DEPARTURE…….-81
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)………..31 NE @ 01:05 A.M.
VECTOR #1 (1-Sec)……….32 NE @ 02:01 A.M.
VECTOR #2 (1-Sec)……….33 NE @ 01:05 A.M.
DAVIS #1……………….31 NE @ 01:21 A.M.
DAVIS #2 ………………30 ENE @ 01:05 A.M.
RMY #1 (Instantaneous)…..34 NE @ 01:05 A.M.
RMY #2 (Instantaneous)…..33 NE @ 02:01 A.M.
MERLIN…………………30 ENE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 NE @ 01:08 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 01:22 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 02:02 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 ENE @ 01:22 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 ENE @ 01:07 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 NE @ 01:22 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 NE @ 12:17 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.0 NNE [215 total miles]
VECTOR #1……………….M (ICING)
VECTOR #2……………….M (ICING)
DAVIS #1………………..M (ICING)
DAVIS #2………………..M (ICING)
RMY #1………………….8.8 NNE
RMY #2………………….8.6 NNE
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.14 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH…………..1.23 DEPARTURE…..-0.56
TOTAL PRECIPITATION FOR THE YEAR (2024)…….48.70 DEPARTURE…..-1.56
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE MONTH………………..3.0 DEPARTURE……+0.1
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….3.0 DEPARTURE……-2.4
————————————————————–
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/-2/0.40/3.0/…/.. 43 WNW VEC1 43 WNW RMY 47
12/6 31/23/27/-8/0.00/0.0/…/.. 39 NW VEC1 39 W RMY 42
12/7 37/22/30/-5/T/T/…/.. 25 S VEC1 25 S RMY 26
12/8 47/28/38/+3/0.02/T/…/.. 37 SSW VEC1 37 SSW RMY 40
12/9 47/34/41/+7/0.41/0.0/…/.. 28 ENE VEC1 28 E RMY 29
12/10 42/31/37/+3/0.15/0.0/…/.. 31 NE VEC1 32 NE RMY 34
12/11 The low since midnight is 36F, the daily normal low is 26F.
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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 11
HIGH 63 IN 1911
LOW -1 IN 1988
PRECIP 2.36 INS. IN 1992
SNOWFALL 4.8 INS. IN 2019
PEAK GUST 78 S IN 1969
RECORDS FOR DECEMBER 12
HIGH 67 IN 1979
LOW -3 IN 1988
PRECIP 3.94 INS. IN 1992
SNOWFALL 20.3 INS. IN 1960
PEAK GUST 75 MPH SSE IN 2008
TODAY’S REPORT PREPARED BY: Matt Douglas
