Thursday, April 11, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, APRIL 11, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0509E
SUNSET: 1822E
STUCK IN THE CLOUDS TODAY WITH VERY LOW VISIBILITY AND DEVELOPING
LIGHT RAIN SHOWERS….
After a few fairly nice days, today has finally turned the other
way. We’ve been stuck in the clouds all day with the visibility
getting no higher than 1/8th of a mile. Some intermittent drizzle
was observed this morning, but light rain showers moved into the
area during the late morning hours, and have continued off and on
into early this afternoon. So far only 0.03″ of water has been
recorded.
The temperature has only ranged a total of 2 degrees in the last
6 hours ending at 1pm, and only a total of 4 degrees since
midnight. Readings have been stuck in the mid 40s during the day-
light hours thus far.
The wind has been on the light side today, mainly out of a north-
northeast to northeasterly direction. The average speed so far
today has only been around 6mph. The peak gust so far has only
been around 15mph.
As mentioned, visibility has been limited today due to being in
the clouds. It has only ranged between 1/16th to 1/8th of a mile
all day.
The maximum temperature so far today is 47F degrees, which is 7
degrees below the normal high of 54F. The minimum temperature since
midnight is 42F degrees, which is 6 degrees above the normal low
of 36F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft, very light drizzle
Temperature: 45F; Dew Point: 45F; Relative Humidity: 100%
Wind: NNE @ 5 kts, wind light
Sea-level pressure: 1019.0 mb; 30.09 in. Hg: falling, then rising
Visibility: 1/16 mile, fog
6-hr Max temp: 45F
6-hr Min temp: 42F
24-hr Precip: Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/16L-F 190/45/45/0305/009/ L- INTMT PCPN VRY LGT
WND LGT/ 8//// 53004 6000/ 70000 10045 20042
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, very light rain
Temperature: 46F; Dew Point: 46F; Relative Humidity: 100%
Wind: NNE @ 5 kts, wind light
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: falling, then rising
Visibility: 1/8 mile, fog
3-hr Precip: Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 X W2 1/8R-F 196/46/46/0305/011/ PCPN VRY LGT WND LGT/
8//// 50006 6000/
1 P.M.
Weather: Sky obscured, vertical visibility 200ft, very light drizzle
Temperature: 45F; Dew Point: 45F; Relative Humidity: 100%
Wind: ENE @ 5 kts, wind light and variable
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: falling, then more slowly
Visibility: 1/16 mile, fog
6-hr Max temp: 47F
6-hr Min temp: 45F
6-hr Precip: 0.03 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 X W2 1/16L-F 185/45/45/0605/008/ PCPN VRY LGT R-B11E40
L-B54 WND L/V/ 8//// 56011 6003/ 10047 20045
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SUMMARY FOR WEDNESDAY, APRIL 10, 2024
TEMPERATURE (DEGREES F)
MAX…….65 NORMAL…..54
MIN…….38 NORMAL…..36
MEAN……52 NORMAL…..45
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+7
TOTAL DEPARTURE FOR THE MONTH…………………….+4 [+0.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………13 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..228 DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE SEASON…………4869 DEPARTURE……-700
TOTAL HEATING UNITS LAST SEASON TO DATE…….4730 DEPARTURE……+139
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)……….E26 S @ 11:05 A.M.
VECTOR #1 (1-Sec)……….26 S @ 11:04 A.M.
VECTOR #2 (1-Sec)……….25 SSE @ 12:35 P.M.
DAVIS #1……………….27 S @ 11:39 A.M.
DAVIS #2 ………………32 S @ 02:21 P.M.
RMY #1 (Instantaneous)…..30 S @ 11:04 A.M.
RMY #2 (Instantaneous)…..26 SSE @ 12:35 P.M.
MERLIN…………………26 S
RICHARDS (C5C) (Inst)……27 @ 11:04 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSE @ 06:36 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 06:06 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 06:05 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 SSE @ 06:37 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 02:22 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SSE @ 06:14 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SE @ 06:06 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………18 @ 06:06 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……11.1 SSE [266 total miles]
VECTOR #1…………….11.3
VECTOR #2…………….12.0
DAVIS #1……………..11.1 SSE
DAVIS #2……………..11.7 SSE
RMY #1……………….10.9 SSE
RMY #2……………….12.1 SE
RICHARDS (C5C)………..11.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..2.51 DEPARTURE…..+0.80
TOTAL PRECIPITATION FOR THE YEAR (2024)…….22.56 DEPARTURE…..+6.83
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-1.0
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-41.8
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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/-8/1.25/0.7/000/00 63 ENE VEC1 64 ENE RMY 68
4/5 45/31/38/-5/0.01/T/147/19 33 WNW VEC1 31 WNW RMY 33
4/6 43/33/38/-5/0.08/093/12 35 N VEC1 35 N RMY 35
4/7 48/34/41/-3/T/0.0/094/12 32 N VEC1 31 N RMY 31
4/8 66/36/51/+7/0.00/0.0/636/81 23 WNW VEC1 23 WNW RMY 22
4/9 63/40/52/+8/0.00/0.0/741/94 22 ENE VEC1 21 ENE RMY 21
4/10 65/38/52/+7/T/0.0/348/44 26 S VEC1 26 S RMY 30
4/11 The low since midnight is 42F, the daily normal low is 36F.
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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 11
HIGH 85 IN 2017
LOW 19 IN 1909
PRECIP 1.72 IN. IN 2003
SNOWFALL 9.5 IN. IN 1958
PEAK GUST 65 MPH NW IN 1963
RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 9.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978
TODAY’S REPORT PREPARED BY: Matt Douglas
