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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, MARCH 11, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0603E
SUNSET: 1746E
SNOWY DAY WITH GUSTY WIND…
In contrast to yesterday’s clear visibility and high pressure,
today has been snowy with low visibility and lower pressure with
a maximum visibility of about 30 miles mid-morning. Currently,
visibility is a minimal 1/8th of a mile with the top of the WGBH
tower hardly visible.
The high so far today is 36F which was the temperature throughout
most of the early morning, which is 6 degrees below the normal
maximum of 42F. The low temperature so far today was 32F, which
is 7 degrees above the normal low of 25F.
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Today’s Observations:
7 A.M.
Weather: Light snow, overcast stratus fractus
Temperature: 35F; Dew Point: 35F; Relative Humidity: 100%
Wind: NE @ 13 kts
Sea-level pressure: 1007.2 mb; 29.74 in. Hg: rising unsteadily
Visibility: 20 miles
6-hr Max temp: 36F
6-hr Min temp: 34F
24-hr Precip: 0.05 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 E30 OVC 20S- 072/35/35/0513/974/ 8/7// 4/000 52010
70005 10036 20034
10 A.M.
Weather: Light snow, overcast stratus fractus
Temperature: 34F; Dew Point: 32F; Relative Humidity: 90%
Wind: NE @ 11G28 kts
Sea-level pressure: 1007.7 mb; 29.76 in. Hg: rising, then more slowly
Visibility: 10 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E10 OVC 10S- 077/34/32/0411G28/976/ 8/7// 4/000 51005
70000
1 P.M.
Weather: Light snow, fog
Temperature: 32F; Dew Point: 32F; Relative Humidity: 100%
Wind: NNE @ 11 kts
Sea-level pressure: 1007.7 mb; 29.76 in. Hg: rising then falling
Visibility: 1/8 mile
6-hr Max temp: 35F
6-hr Min temp: 32F
6-hr Precip: 0.01 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 X W3 1/8S-F 077/32/32/0311/976/ 8//// 4/000 50000 6001/ 10035
20032
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SUMMARY FOR FRIDAY, MARCH 10, 2023
TEMPERATURE (DEGREES F)
MAX…….49 NORMAL…..42
MIN…….27 NORMAL…..25
MEAN……38 NORMAL…..34
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+4
TOTAL DEPARTURE FOR THE MONTH…………………+32 [+3.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………27 DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..293 DEPARTURE…….-33
TOTAL HEATING UNITS FOR THE SEASON…………4013 DEPARTURE……-745
TOTAL HEATING UNITS LAST SEASON TO DATE…….4376 DEPARTURE……-363
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
420C, Contacting, Merlin and Richards are all Main Tower.
420C (Official)…………18 W @ 12:42 P.M.
VECTOR #1 (1-Sec)……….18 SE @ 6:55 P.M.
VECTOR #2 (1-Sec)……….17 SE @ 5:34 P.M.
DAVIS #1……………….17 WSW @ 12:42 P.M.
DAVIS #2 ………………17 ESE @ 5:15 P.M.
RMY #1 (Instantaneous)…..17 W @ 12:42 P.M.
RMY #2 (Instantaneous)…..17 SE @ 5:34 P.M.
MERLIN………………….M M
RICHARDS (C5C) (Inst)……17 @ 12:42 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 SSE @ 7:04 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 5:22 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 5:14 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 ESE @ 5:17 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 SE @ 7:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 ESE @ 5:17 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 SE @ 7:06 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 @ 5:17 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….6.9 NNW [165 total miles]
VECTOR #1……………..7.4
VECTOR #2……………..7.7
DAVIS #1………………7.3 NW
DAVIS #2………………7.3 NNW
RMY #1………………..7.3 NW
RMY #2………………..7.6 NW
RICHARDS (C5C)…………7.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.05 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.19 DEPARTURE…..-0.56
TOTAL PRECIPITATION FOR THE YEAR……………9.84 DEPARTURE…..-0.41
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..3.4 DEPARTURE……-2.8
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……27.7 DEPARTURE…..-30.4
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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/+4/0.05/0.0/…/.. 18 W VEC1 18 SE RMY 17
3/11 The low since midnight is 34F, the daily normal low is 25F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MARCH 11
HIGH 71 IN 2021
LOW 4 IN 1939, 1960
PRECIP 2.11 INS. IN 1901
SNOWFALL 6.3 INS. IN 1934
PEAK GUST 66e MPH W IN 1980
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
TODAY’S REPORT PREPARED BY: Samantha Richard
