Saturday, September 14, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, SEPTEMBER 14, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0524E
SUNSET: 1755E
MOSTLY CLEAR SKIES, WILDFIRE SMOKE HANGS AROUND…
High pressure remains in control again today. Aside from some thin cirrus
clouds that have moved in from the north, and some fair weather cumulus popping
up to our west, skies have been mostly clear with plenty of sunshine. The smoke
layer that has been present over the region remains in place, reducing our
visibility. Some of the smoke seems to have made it to the surface, as I could
faintly smell it while out for the 1pm observation.
The temperature briefly dropped into the low 60s just after midnight.
Following sunrise, we quickly warmed into the low 80s, which is again above
normal for mid-September. The dew point has risen a touch, but remains in
the low 60s.
Winds have been on the lighter side, averaging around 9mph, mostly out
of the northeast. The peak gust so far is around 18mph, occurring just after
1pm.
Visibility has been modest, with the view declining from 30 miles to 20 miles.
The smoke layer combined with higher dew points is making it a bit hazy out there.
The maximum temperature so far today is 81F, which is 7 degrees
above the normal high of 74F. The minimum temperature since midnight
is 63F, which is 7 degrees above the normal low of 56F.
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Today’s Observations:
7 A.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 68F; Dew Point: 61F; Relative Humidity: 79%
Wind: NNE @ 7 kts
Sea-level pressure: 1024.9 mb; 30.27 in. Hg: rising unsteadily
Visibility: 30 miles, hazy
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 30 249/68/61/0207/027/ THN K LYR ALF ALQDS HAZY/ 8/000 52013
10068 20064
10 A.M.
Weather: Thin scattered cirrus, thin smoke layer aloft all quadrants
Temperature: 76F; Dew Point: 62F; Relative Humidity: 61%
Wind: NE @ 8 kts
Sea-level pressure: 1026.0 mb; 30.30 in. Hg: rising, then more slowly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 250 -SCT 30 260/76/62/0508/030/ THN K LYR ALF ALQDS HAZY/
8/001 51011
1 P.M.
Weather: Thin scattered cirrus, few cumulus distant SSE-W-NNW,
thin smoke layer all quadrants
Temperature: 78F; Dew Point: 62F; Relative Humidity: 55%
Wind: ENE @ 8G13 kts
Sea-level pressure: 1025.4 mb; 30.28 in. Hg: falling steadily
Visibility: 20 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 68F
6-hr Precip: 0.00 inches
BHO SA 1755 250 -SCT 20 254/78/62/0608G13/028/ FEW CU DSNT SSE-W-NNW
THN K LYR ALQDS HAZY/ 8/201 57006 10081 20068
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SUMMARY FOR FRIDAY, SEPTEMBER 13, 2024
TEMPERATURE (DEGREES F)
MAX…….85 NORMAL…..74
MIN…….59 NORMAL…..57
MEAN……72 NORMAL…..65
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+7
TOTAL DEPARTURE FOR THE MONTH……………………..-2 [-0.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH……………10 DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE SEASON…………..21 DEPARTURE…….-17
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+18
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….7 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………37 DEPARTURE…….-11
TOTAL COOLING UNITS FOR THE SEASON………….731 DEPARTURE…….+87
TOTAL COOLING UNITS LAST SEASON TO DATE……..688 DEPARTURE…….+43
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E21 SSW @ 05:51 P.M.
VECTOR #1 (1-Sec)……….20 SSW @ 05:51 P.M.
VECTOR #2 (1-Sec)……….19 SW @ 01:18 A.M.
DAVIS #1……………….22 S @ 05:51 P.M.
DAVIS #2 ………………22 S @ 05:47 P.M.
RMY #1 (Instantaneous)…..20 SSW @ 05:51 P.M.
RMY #2 (Instantaneous)…..19 S @ 05:52 P.M.
MERLIN…………………19 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 SSW @ 06:03 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 05:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 05:49 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 S @ 05:52 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S @ 05:49 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 SSW @ 05:53 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 S @ 05:49 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..7.9 WSW [189 total miles]
VECTOR #1………………8.4
VECTOR #2………………8.7
DAVIS #1……………….8.1 SW
DAVIS #2……………….8.6 SW
RMY #1…………………8.3 SW
RMY #2…………………8.7 SW
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.04 DEPARTURE…..-1.53
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.25 DEPARTURE…..+5.07
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
9/1 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/737/95 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/240/31 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/301/39 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/753/98 35 W VEC1 35 W RMY 34
9/9 75/51/63/-4/0.00/727/95 31 WNW VEC1 28 WNW RMY 30
9/10 78/56/67/+1/0.00/717/94 21 NW VEC1 20 SW RMY 21
9/11 78/53/66/0/0.00/714/94 20 S VEC1 19 S RMY 18
9/12 82/58/70/+4/0.00/…/.. 20 S VEC1 19 S RMY 20
9/13 85/59/72/+7/0.00/…/.. 21 SSW VEC1 20 SSW RMY 20
9/14 The low since midnight is 63F, the daily normal low is 56F.
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SEPTEMBER 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 SEPTEMBER 14
HIGH 90F IN 1931
LOW 34F IN 1911
PRECIP 2.90 INCHES IN 1944 (Great Atlantic Hurricane in 1944)
PEAK GUST 96e MPH E IN 1944 (Great Atlantic Hurricane in 1944)
RECORDS FOR SEPTEMBER 15
HIGH 89F IN 1931
LOW 35F IN 1913
PRECIP 3.93 INCHES IN 1904 (Extra-tropical storm making landfall in New England on
9/15/1904 passing east of BHO and bringing a storm total of 4.11 inches 9/14-15/1904)
PEAK GUST 65e MPH NW IN 1944 (In the wake of Great Atlantic Hurricane)
TODAY’S REPORT PREPARED BY: Joshua Polen
