Friday, April 5, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, APRIL 5, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0519E
SUNSET: 1815E
SHORT-LIVED SUNSHINE THIS MORNING AS CLOUDS RETURN…
As a result of yesterday’s storm stalling out to our northeast over
the Gulf of Maine, conditions have remained cool and dreary today.
Despite this, we did manage a bit of sunshine this morning,
which was much appreciated! And for those wondering, no, I unfortunately
did not feel this morning’s earthquake in northern NJ from up here.
As mentioned before, temperatures have stayed on the cool side today,
with readings rising from just below freezing this morning to the low
40s by late morning. The dew point has been hovering in the low 30s all
day.
Winds have certainly slowed since yesterday, with our average speed so
far being 13mph, primarily out of the west-northwest. The peak gust to
this point is around 29mph, occurring just after 9am.
Visibility has held steady at 50 miles all day.
The maximum temperature so far today is 43F degrees, which is 9
degrees below the normal high of 52F. The minimum temperature since
midnight is 31F degrees, which is 3 degrees below the normal low of
34F.
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Today’s Observations:
7 A.M.
Weather: Scattered cirrostratus, thin broken cirrus,
few stratocumulus, few altocumulus/altostratus distant
Temperature: 33F; Dew Point: 30F; Relative Humidity: 90%
Wind: WNW @ 9G16 kts
Sea-level pressure: 998.4 mb; 29.48 in. Hg: rising, then more slowly
Visibility: 50 miles
6-hr Max temp: 33F
6-hr Min temp: 31F
24-hr Precip: 0.51 inches
24-hr Snowfall: Trace
Snow Depth: Trace
BHO SA 1155 E220 SCT 250 -BKN 50 984/33/30/2809G16/948/ FEW SC ALQDS
FEW AC/AS DSNT ALQDS S-E05 TOTAL NEW SNW PST 24 HRS TRACE/ 8/575 4/000
51008 6000/ 70051 10033 20031
10 A.M.
Weather: Broken stratocumulus, broken cirrostratus, broken cirrus
Temperature: 41F; Dew Point: 31F; Relative Humidity: 68%
Wind: WNW @ 10G18 kts
Sea-level pressure: 998.7 mb; 29.49 in. Hg: falling, then rising
Visibility: 50 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E28 BKN 220 BKN 250 BKN 50 987/41/31/3010G18/949/
8/506 53003
1 P.M.
Weather: Overcast stratocumulus, virga distant WNW-NE
Temperature: 40F; Dew Point: 31F; Relative Humidity: 68%
Wind: WNW @ 13 kts
Sea-level pressure: 999.6 mb; 29.52 in. Hg: rising unsteadily
Visibility: 50 miles
6-hr Max temp: 43F
6-hr Min temp: 33F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E35 OVC 50 996/40/31/2913/952/ VIRGA DSNT WNW-N-NE/
8/5// 52009 10043 20033
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SUMMARY FOR THURSDAY, APRIL 4, 2024
TEMPERATURE (DEGREES F)
MAX…….36 NORMAL…..51
MIN…….32 NORMAL…..33
MEAN……34 NORMAL…..42
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………-8
TOTAL DEPARTURE FOR THE MONTH……………………-5 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………31 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH……………99 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE SEASON…………4740 DEPARTURE……-701
TOTAL HEATING UNITS LAST SEASON TO DATE…….4611 DEPARTURE……+129
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)……….E63 ENE @ 05:51 A.M.
VECTOR #1 (1-Sec)……….64 ENE @ 05:50 A.M.
VECTOR #2 (1-Sec)……….64 ENE @ 07:07 A.M.
DAVIS #1……………….62 ENE @ 05:50 A.M.
DAVIS #2 ………………60 E @ 06:39 A.M.
RMY #1 (Instantaneous)…..68 ENE @ 05:50 A.M.
RMY #2 (Instantaneous)…..68 ENE @ 05:39 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……62 @ 05:57 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………41 ENE @ 07:01 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..38 @ 07:02 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..44 @ 07:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………45 ENE @ 07:01 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………44 E @ 07:01 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..42 ENE @ 07:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..43 ENE @ 07:02 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………41 @ 07:02 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……24.3 ENE [584 total miles]
VECTOR #1…………….21.2
VECTOR #2…………….23.5
DAVIS #1……………..23.6 NE
DAVIS #2……………..23.4 NE
RMY #1……………….21.9 NNE
RMY #2……………….22.9 NNE
RICHARDS (C5C)………..22.3
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.51 DEPARTURE…..+0.34
TOTAL PRECIPITATION FOR THE MONTH…………..2.42 DEPARTURE…..+1.75
TOTAL PRECIPITATION FOR THE YEAR (2024)…….22.47 DEPARTURE…..+7.78
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-40.9
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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/…/0.7/…/.. 63 ENE VEC1 64 ENE RMY 68
4/5 The low since midnight is 31F, the daily normal low is 34F.
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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 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963
RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940
TODAY’S REPORT PREPARED BY: Joshua Polen
