Wednesday, September 25, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, SEPTEMBER 25, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0535E
SUNSET: 1735E
OVERCAST SKIES DOMINATE YET AGAIN, TEMPERATURES CONTINUE BELOW NORMAL….
Clouds are once again in charge of the sky today, the one difference,
we’ve had no form of rain so far today, so it’s been a dry day at
least. We’ve seen a few very brief peeks of sun here and there, but
nothing much to get too excited about.
Temperatures are once again below normal today with readings reaching
the low to mid 60s. A touch warmer than yesterday at least. The normal
high for today’s date is 69F.
The wind is lighter today than it’s been the past few days. The
average speed for the day so far is around 8mph and is still mainly
out of an easterly direction. The peak gust for the day so far is
18mph, which occurred before 1:30am this morning, and again right at
1pm.
Visibility has been holding at around 30-35 miles all day today.
The maximum temperature so far today is 65F, which is 4 degrees below
the normal high of 69F. The minimum temperature since midnight is 56F,
which is 4 degrees above the normal low of 52F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratocumulus, few breaks in overcast distant SW-WSW,
few lower stratus fractus distant all quadrants
Temperature: 58F; Dew Point: 52F; Relative Humidity: 81%
Wind: E @ 8 kts
Sea-level pressure: 1024.5 mb; 30.25 in. Hg: rising, then more slowly
Visibility: 30 miles
6-hr Max temp: 58F
6-hr Min temp: 56F
24-hr Precip: 0.01 inches
BHO SA 1155 E37 OVC 30 245/58/52/1008/025/ FEW BINOVC DSNT SW-WSW
FEW LWR STFRA DSNT ALQDS/ 8/5// 51012 70001 10058 20056
10 A.M.
Weather: Overcast stratocumulus, few breaks in overcast WNW and
distant NNE-SE, higher clouds visible WNW and distant NNE-SE
Temperature: 61F; Dew Point: 53F; Relative Humidity: 73%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1024.9 mb; 30.27 in. Hg: rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E33 OVC 30 249/61/53/1105/027/ FEW BINOVC WNW AND DSNT
NNE-SE HIER CLDS VSBL WNW AND DSNT NNE-SE HAZY WND LGT/ 8/5// 50004
1 P.M.
Weather: Broken stratocumulus, overcast altostratus, few breaks in
overcast distant NNE-E, few lower stratus fractus all quadrants
Temperature: 63F; Dew Point: 53F; Relative Humidity: 68%
Wind: ESE @ 8 kts
Sea-level pressure: 1024.2 mb; 30.24 in. Hg: falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 58F
6-hr Precip: 0.00 inches
BHO SA 1755 E33 BKN 85 OVC 35 242/63/53/1108/024/ FEW BINOVC DSNT
NNE-E FEW LWR STFRA ALQDS HIER CLDS VSBL DSNT NNE-E HAZY/ 8/52/
58007 10065 20058
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SUMMARY FOR TUESDAY, SEPTEMBER 24, 2024
TEMPERATURE (DEGREES F)
MAX…….61 NORMAL…..70
MIN…….51 NORMAL…..53
MEAN……56 NORMAL…..61
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-5
TOTAL DEPARTURE FOR THE MONTH……………………..+6 [+0.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….9 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH……………45 DEPARTURE…….-17
TOTAL HEATING UNITS FOR THE SEASON…………..56 DEPARTURE…….-24
TOTAL HEATING UNITS LAST SEASON TO DATE………42 DEPARTURE…….+14
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………59 DEPARTURE…….-10
TOTAL COOLING UNITS FOR THE SEASON………….753 DEPARTURE…….+88
TOTAL COOLING UNITS LAST SEASON TO DATE……..689 DEPARTURE…….+64
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)……….E25 ENE @ 04:45 P.M.
VECTOR #1 (1-Sec)……….22 ENE @ 01:56 P.M.
VECTOR #2 (1-Sec)……….24 ENE @ 12:19 P.M.
DAVIS #1……………….23 E @ 10:22 A.M.
DAVIS #2 ………………23 ENE @ 12:18 P.M.
RMY #1 (Instantaneous)…..24 ENE @ 03:37 P.M.
RMY #2 (Instantaneous)…..25 ENE @ 12:18 P.M.
MERLIN…………………22 E
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 ENE @ 04:50 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 @ 10:57 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 03:38 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 E @ 04:12 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 E @ 03:38 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 ENE @ 04:11 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 ENE @ 03:38 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.0 ENE [239 total miles]
VECTOR #1………………9.6
VECTOR #2……………..10.6
DAVIS #1………………10.5 ENE
DAVIS #2………………10.4 ENE
RMY #1…………………9.9 ENE
RMY #2………………..10.4 NE
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.41 DEPARTURE…..-1.74
TOTAL PRECIPITATION FOR THE YEAR (2024)…….42.62 DEPARTURE…..+4.86
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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/+4/0.00/711/94 20 S VEC1 19 S RMY 20
9/13 85/59/72/+7/0.00/595/79 21 SSW VEC1 20 SSW RMY 20
9/14 81/61/71/+6/0.00/691/92 21 ENE VEC1 20 ENE RMY 21
9/15 78/60/69/+4/0.00/598/80 23 SE VEC1 23 SE RMY 25
9/16 83/55/69/+5/0.00/700/94 22 SSW VEC1 21 SSW RMY 21
9/17 83/55/69/+5/0.00/453/61 16 SW VEC1 14 S RMY 15
9/18 77/60/69/+6/0.00/163/22 15 W VEC1 14 W RMY 14
9/19 69/60/65/+2/0.10/000/00 30 NE VEC1 30 NE RMY 31
9/20 64/58/61/-2/0.12/000/00 38 NE VEC1 38 NE RMY 40
9/21 58/55/57/-5/1.13/000/00 35 NNE VEC1 31 NNE RMY 31
9/22 63/54/59/-3/0.01/190/26 35 NE VEC1 31 NE RMY 34
9/23 62/52/57/-5/T/…/.. 28 ENE VEC1 27 NE RMY 27
9/24 61/51/56/-5/0.01/…/.. 25 ENE VEC1 22 ENE RMY 24
9/25 The low since midnight is 56F, the daily normal low is 52F.
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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 25
HIGH 87F IN 1970
LOW 31F IN 1950
PRECIP 2.68 INCHES IN 1961
PEAK GUST 63 MPH SSW IN 1991
RECORDS FOR SEPTEMBER 26
HIGH 91F IN 2007
LOW 36F IN 1905,1922,1978
PRECIP 3.84 INCHES IN 1888
PEAK GUST 54e MPH S IN 1977
TODAY’S REPORT PREPARED BY: Matt Douglas
