Tuesday, April 9, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, APRIL 9, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0512E
SUNSET: 1820E
PLENTY OF SUNSHINE DESPITE INCREASING HIGH CLOUDS WITH MILD TEMPERATURES
CONTINUING TODAY….
Another spectacular day is in progress today with plenty of bright
sunshine and mild temperatures. Make sure you get out and enjoy it as
clouds and wet weather will return by tomorrow, lasting through the
end of the week (yet again!).
The temperature has reached the low to mid 60s early this afternoon,
however it’s being limited a bit by the sea-breeze that has developed.
The dew point remains on the low side with readings in the upper 20s
to low 30s.
The wind started the day generally on the light side, but has picked
up a bit once it switched to an onshore direction. The average speed
for the day so far is around 10mph. The peak gust so far for the day
is around 20mph, which occurred just after 10am.
Visibility is excellent today, holding at around 70 miles all day.
The maximum temperature so far today is 63F degrees, which is 10
degrees above the normal high of 53F. The minimum temperature since
midnight is 46F degrees, which is 11 degrees above the normal low
of 35F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus distant all quadrants, few cirrus distant
all quadrants
Temperature: 52F; Dew Point: 29F; Relative Humidity: 41%
Wind: NW @ 9 kts
Sea-level pressure: 1017.2 mb; 30.04 in. Hg: falling, then rising
Visibility: 70 miles
6-hr Max temp: 52F
6-hr Min temp: 46F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 70 172/52/29/3209/004/ FEW AC DSNT ALQDS FEW CI DSNT ALQDS/
8/051 53006 10052 20046
10 A.M.
Weather: Clear, few altocumulus distant N-NNE, few cirrus SE-SW-NW
Temperature: 61F; Dew Point: 31F; Relative Humidity: 31%
Wind: NE @ 7 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 179/61/31/0507/006/ FEW AC DSNT N-NNE FEW CI SE-SW-NW/
8/051 50007
1 P.M.
Weather: Thin broken cirrus, few altocumulus distant SSW
Temperature: 61F; Dew Point: 28F; Relative Humidity: 27%
Wind: ENE @ 8 kts
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 63F
6-hr Min temp: 52F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E250 -BKN 70 181/61/28/0708/006/ FEW AC DSNT SSW/ 8/051 50002
10063 20052
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SUMMARY FOR MONDAY, APRIL 8, 2024
TEMPERATURE (DEGREES F)
MAX…….66 NORMAL…..53
MIN…….36 NORMAL…..35
MEAN……51 NORMAL…..44
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+7
TOTAL DEPARTURE FOR THE MONTH……………………-11 [-1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..202 DEPARTURE…….+21
TOTAL HEATING UNITS FOR THE SEASON…………4843 DEPARTURE……-685
TOTAL HEATING UNITS LAST SEASON TO DATE…….4693 DEPARTURE……+150
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E23 WNW @ 04:20 P.M.
VECTOR #1 (1-Sec)……….23 WNW @ 04:15 P.M.
VECTOR #2 (1-Sec)……….24 WNW @ 04:20 P.M.
DAVIS #1……………….21 W @ 03:50 P.M.
DAVIS #2 ………………22 WNW @ 04:15 P.M.
RMY #1 (Instantaneous)…..22 WNW @ 04:13 P.M.
RMY #2 (Instantaneous)…..25 WNW @ 04:15 P.M.
MERLIN…………………20 NW
RICHARDS (C5C) (Inst)……22 @ 04:20 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 WNW @ 04:18 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 04:51 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 04:20 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 W @ 04:51 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW @ 04:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 WNW @ 04:28 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 WNW @ 04:20 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 04:28 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.4 WNW [226 total miles]
VECTOR #1……………..9.7
VECTOR #2…………….10.2
DAVIS #1………………9.9 WNW
DAVIS #2………………9.8 NW
RMY #1………………..9.5 WNW
RMY #2……………….10.0 WNW
RICHARDS (C5C)………..10.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..2.51 DEPARTURE…..+1.16
TOTAL PRECIPITATION FOR THE YEAR (2024)…….22.56 DEPARTURE…..+7.19
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-41.5
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PRELIMINARY CLIMATE SUMMARY FOR APRIL 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
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
4/1 56/40/48/+7/0.00/0.0/153/20 20 SSE VEC1 20 SSE RMY 19
4/2 47/35/41/0/0.07/0.0/115/15 25 E VEC1 25 E RMY 25
4/3 41/34/38/-4/1.10/T/000/00 53 E VEC1 53 E RMY 53
4/4 36/32/34/-8/1.25/0.7/…/.. 63 ENE VEC1 64 ENE RMY 68
4/5 45/31/38/-5/0.01/T/…/.. 33 WNW VEC1 31 WNW RMY 33
4/6 43/33/38/-5/0.08/…/.. 35 N VEC1 35 N RMY 35
4/7 48/34/41/-3/T/0.0/…/.. 32 N VEC1 31 N RMY 31
4/8 66/36/51/+7/0.00/0.0/…/.. 23 WNW VEC1 23 WNW RMY 22
4/9 The low since midnight is 46F, the daily normal low is 35F.
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APRIL 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 APRIL 9
HIGH 83 IN 1991
LOW 18 IN 1888
PRECIP 2.38 IN. IN 1935
SNOWFALL 11.0 IN. IN 1917
PEAK GUST 72 MPH WNW IN 1962
RECORDS FOR APRIL 10
HIGH 83 IN 1922
LOW 20 IN 1985
PRECIP 2.40 IN. IN 1935
SNOWFALL 10.1 IN. IN 1996
PEAK GUST 66 MPH WNW IN 1967
TODAY’S REPORT PREPARED BY: Matt Douglas
