Friday, March 10, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, MARCH 10, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0605E
SUNSET: 1745E
SUNNY DAY WITH ABOVE AVERAGE TEMPERATURE…
Conditions were near perfect on top of Great Blue Hill today.
We had light and variable wind from the west that increased slightly
in the late morning/early afternoon hours.
Pressure has been dropping throughout the day today. As pressure
dropped cloud cover increased but the sun still shone brightly for
most of the day through the thin cirrus clouds. The temperature rose
to an above average and pleasant high so far of 48 degrees.
With dry air in the region visibility has been excellent with views
of 75-80 miles all day.
The high so far today is 48F, which is 6 degrees above the normal
maximum of 42F. The low since midnight is 27F, which is 2 degrees
above the normal low of 25F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cumulus distant NNE-ESE, few cirrostratus
SSE-W
Temperature: 28F; Dew Point: 24F; Relative Humidity: 85%
Wind: WNW @ 5 kts, wind light
Sea-level pressure: 1019.4 mb; 30.10 in. Hg: steady, then rising
Visibility: 80 miles
6-hr Max temp: 31F
6-hr Min temp: 27F
24-hr Precip: 0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 CLR 80 194/28/24/2905/010/ FEW CU DSNT NNE-ESE FEW CS
SSE-W WND LGT/ 8/205 4/000 58005 10031 20027
10 A.M.
Weather: Thin scattered cirrostratus, few cumulus distant E-SSW
Temperature: 40F; Dew Point: 27F; Relative Humidity: 78%
Wind: NW @ 5 kts
Sea-level pressure: 1017.7 mb; 30.05 in. Hg: falling, then slowly
Visibility: 75 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 -SCT 75 177/40/27/3105/005/ FEW CU DSNT E-SSW WND LGT/
8/206 56017
1 P.M.
Weather: Thin broken cirrostratus, few cumulus distant SSE-SSW
Temperature: 45F; Dew Point: 25F; Relative Humidity: 45%
Wind: WNW @ 5 kts, wind light and variable
Sea-level pressure: 1014.3 mb; 29.95 in. Hg: falling, then more rapidly
Visibility: 75 miles
6-hr Max temp: 48F
6-hr Min temp: 28F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 250 -BKN 75 143/45/25/2805/995/ FEW CU DSNT SSE-SSW
WND L/V/ 8/206 4/000 58034 10048 20028
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SUMMARY FOR THURSDAY, MARCH 9, 2023
TEMPERATURE (DEGREES F)
MAX…….47 NORMAL…..42
MIN…….32 NORMAL…..25
MEAN……40 NORMAL…..33
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+7
TOTAL DEPARTURE FOR THE MONTH…………………+28 [+2.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………25 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..266 DEPARTURE…….-28
TOTAL HEATING UNITS FOR THE SEASON…………3986 DEPARTURE……-741
TOTAL HEATING UNITS LAST SEASON TO DATE…….4349 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)…………28 NW @ 1:41 A.M.
VECTOR #1 (1-Sec)……….28 NW @ 1:41 A.M.
VECTOR #2 (1-Sec)……….30 NNW @ 1:21 A.M.
DAVIS #1……………….26 NNW @ 1:36 A.M.
DAVIS #2 ………………27 N @ 1:21 A.M.
RMY #1 (Instantaneous)…..30 NNW @ 1:36 A.M.
RMY #2 (Instantaneous)…..29 N @ 1:21 A.M.
MERLIN………………….M M
RICHARDS (C5C) (Inst)……28 @ 1:36 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 NNW @ 1:22 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 1:22 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 12:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NW @ 1:22 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NW @ 12:00 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 NNW @ 1:22 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NNW @ 12:01 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 @ 1:22 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.4 NNW [250 total miles]
VECTOR #1……………..9.1
VECTOR #2……………..9.8
DAVIS #1……………..10.5 N
DAVIS #2……………..10.6 NNE
RMY #1………………..9.2 N
RMY #2………………..9.6 N
RICHARDS (C5C)………..10.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE MONTH…………..1.14 DEPARTURE…..-0.43
TOTAL PRECIPITATION FOR THE YEAR……………9.79 DEPARTURE…..-0.28
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……-2.2
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……27.7 DEPARTURE…..-29.8
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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 The low since midnight is 27F, 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 10
HIGH 69 IN 1977
LOW 2 IN 1984
PRECIP 2.00 INS. IN 1994
SNOWFALL 5.5 INS. IN 1918
PEAK GUST 80 MPH NW IN 1974
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
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
