Sunday, March 12, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, MARCH 12, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0601E
SUNSET: 1747E
SUNNY DAY WITH HIGHER PRESSURE AND MINIMAL CLOUDS…
Today has been an exceptionally sunny and clear day with great
visibility and limited cloud cover. Clear skies and moderate
temperatures are attracting a lot of visitors to the hill,
and daylight savings time, which went into effect last night,
didn’t stop the early morning crowd from hiking the hill.
The high so far today is 41F which is 2 degrees below the normal
maximum of 43F. The low temperature so far today was 28F, which
is 2 degrees above the normal low of 25F. We are expecting mixed
precipitation over the next few days starting tomorrow night
through Wednesday.
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrostratus NE-SE
Temperature: 31F; Dew Point: 24F; Relative Humidity: 75%
Wind: N @ 11 kts
Sea-level pressure: 1015.7 mb; 29.99 in. Hg: rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 31F
6-hr Min temp: 28F
24-hr Precip: 0.09 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 CLR 70 157/31/24/3611/999/ FEW CS NE-SE 8/005 4/000
53016 70009 10031 20028
10 A.M.
Weather: Scattered stratocumulus
Temperature: 36F; Dew Point: 31F; Relative Humidity: 77%
Wind: N @ 11 kts
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: steady then rising
Visibility: 70 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 30 SCT 60 161/36/31/0111/001/ 8/400 53004
1 P.M.
Weather: Scattered stratocumulus
Temperature: 40F; Dew Point: 33F; Relative Humidity: 75%
Wind: N @ 9 kts
Sea-level pressure: 1017.6 mb; 30.05 in. Hg: rising unsteadily
Visibility: 60 miles
6-hr Max temp: 41F
6-hr Min temp: 31F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 30 SCT 60 176/40/33/0109/005/ 8/400 52015 10041 20031
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SUMMARY FOR SATURDAY, MARCH 11, 2023
TEMPERATURE (DEGREES F)
MAX…….36 NORMAL…..42
MIN…….29 NORMAL…..25
MEAN……33 NORMAL…..34
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-1
TOTAL DEPARTURE FOR THE MONTH…………………+31 [+2.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………32 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………..325 DEPARTURE…….-32
TOTAL HEATING UNITS FOR THE SEASON…………4045 DEPARTURE……-744
TOTAL HEATING UNITS LAST SEASON TO DATE…….4397 DEPARTURE……-352
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
420C, Contacting, Merlin and Richards are all Main Tower.
420C (Official)…………32 NE @ 9:46 A.M.
VECTOR #1 (1-Sec)……….35 NE @ 9:46 A.M.
VECTOR #2 (1-Sec)……….35 NE @ 9:35 A.M.
DAVIS #1……………….32 NE @ 9:46 A.M.
DAVIS #2 ………………31 ENE @ 9:47 A.M.
RMY #1 (Instantaneous)…..34 NE @ 9:05 A.M.
RMY #2 (Instantaneous)…..34 NE @ 9:35 A.M.
MERLIN…………………30 NE
RICHARDS (C5C) (Inst)……31 NE @ 9:35 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 NE @ 9:46 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 9:47 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 9:47 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 NE @ 9:47 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NE @ 9:47 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 NE @ 9:47 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 NNE @ 4:10 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 9:47 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….11.3 NNE [272 total miles]
VECTOR #1……………..11.0
VECTOR #2……………..11.5
DAVIS #1………………11.4 NE
DAVIS #2………………11.4 NE
RMY #1………………..11.0 NE
RMY #2………………..11.4 NE
RICHARDS (C5C)…………11.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.08
TOTAL PRECIPITATION FOR THE MONTH…………..1.28 DEPARTURE…..-0.64
TOTAL PRECIPITATION FOR THE YEAR……………9.93 DEPARTURE…..-0.49
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………..3.4 DEPARTURE……-3.3
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……27.7 DEPARTURE…..-30.9
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PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
VEC1: Vector #1 1-second gust
RMY: R.M. Young wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
3/1 43/27/35/+4/0.00/0.0/425/63 20 NW VEC1 21 SE RMY 21
3/2 40/34/37/+5/0.31/0.0/000/00 35 NW VEC1 36 NW RMY 39
3/3 44/29/37/+5/0.01/0.1/462/68 33 NW VEC1 34 NW RMY 36
3/4 33/28/31/-1/0.82/3.3/000/00 48 E VEC1 49 NE RMY 52
3/5 41/25/33/+1/0.00/0.0/240/35 35 NW VEC1 36 NW RMY 37
3/6 46/31/39/+6/0.00/0.0/571/83 46 WNW VEC1 48 NW RMY 51
3/7 38/26/32/-1/T/T/387/56 41 NW VEC1 42 NW RMY 46
3/8 44/26/35/+2/T/T/…/.. 32 N VEC1 34 N RMY 34
3/9 47/32/40/+7/0.00/0.0/…/.. 28 NW VEC1 28 NW RMY 29
3/10 49/27/38/+4/0.00/0.0/…/.. 18 W VEC1 18 SE RMY 17
3/11 36/29/33/-1/0.14/0.0/…/.. 32 NE VEC1 34 NE RMY 34
3/12 The low since midnight is 28F, the daily normal low is 26F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MARCH 12
HIGH 72 IN 2012
LOW 2 IN 1885
PRECIP 2.87 INS. IN 1888
SNOWFALL 9.7 INS. IN 1959
PEAK GUST 66 MPH SE IN 1962
RECORDS FOR MARCH 13
HIGH 72 IN 1990
LOW -1 IN 1885
PRECIP 2.47 INS. IN 1993
SNOWFALL 23.0 INS. IN 2018 [RECORD FOR MONTH]
PEAK GUST 76 MPH ENE IN 1993 [THE “STORM OF THE CENTURY”]
TODAY’S REPORT PREPARED BY: Samantha Richard
