Sunday, September 22, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, SEPTEMBER 22, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0532E
SUNSET: 1741E
OVERCAST, COOL AND BREEZY WITH IMPROVED VISIBILITY IN
COMPARISON TO DAYS PRIOR….
This has been a good weather observation day, considering the last
three days! Rainfall yesterday morning until the 7 A.M. observation
totaled 1.03 inches, bringing our monthly total to 1.40 inches. This is
much needed, since we are still at a deficit of -1.31 inches on the
month.
We started the day foggy at 10 miles of visibility, improving to 60 miles
by the 1 P.M. observation. Skies were overcast until around noon, where
some sunshine started to break through the clouds.
We’ve experienced a cool breeze from the northeast, averaging 12 mph with
frequent gusts over 20 mph.
The maximum temperature so far today is 63F, which is 7 degrees below
the normal high of 70F. The minimum temperature since midnight is 54F,
which is a degree above the normal low of 53F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 56F; Dew Point: 55F; Relative Humidity: 96%
Wind: NNE @ 8G16 kts
Sea-level pressure: 1017.1 mb; 30.03 in. Hg: rising unsteadily
Visibility: 10 miles, fog
6-hr Max temp: 57F
6-hr Min temp: 54F
24-hr Precip: 1.03 inches
BHO SA 1155 30 OVC 10F 171/56/55/0208G16/003/ 8/6// 52012 70103 10057 20054
10 A.M.
Weather: Overcast stratus
Temperature: 58F; Dew Point: 56F; Relative Humidity: 92%
Wind: NE @ 10G18 kts
Sea-level pressure: 1018.3 mb; 30.07 in. Hg: rising, then more slowly
Visibility: 15 miles, thin fog
3-hr Precip: 0.00 inches
BHO SA 1455 30 OVC 15 183/58/56/0410G18/007/ THN F ALQDS/ 8/6// 51012
1 P.M.
Weather: Broken stratocumulus, broken altocumulus, broken cirrocumulus
Temperature: 63F; Dew Point: 52F; Relative Humidity: 68%
Wind: NE @ 12G22 kts
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: rising then falling
Visibility: 60 miles
6-hr Max temp: 63F
6-hr Min temp: 55F
6-hr Precip: 0.00 inches
BHO SA 1755 30 BKN 130 BKN E220 BKN 60 181/63/52/0412G22/006/ 8/559 55002 10063 20055
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SUMMARY FOR SATURDAY, SEPTEMBER 21, 2024
TEMPERATURE (DEGREES F)
MAX…….58 NORMAL…..71
MIN…….55 NORMAL…..54
MEAN……57 NORMAL…..62
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-5
TOTAL DEPARTURE FOR THE MONTH…………………….+19 [+0.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….8 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH……………22 DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………..33 DEPARTURE…….-32
TOTAL HEATING UNITS LAST SEASON TO DATE………22 DEPARTURE…….+11
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH……………59 DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE SEASON………….753 DEPARTURE…….+92
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)……….E35 NNE @ 12:37 A.M.
VECTOR #1 (1-Sec)……….31 NNE @ 03:10 A.M.
VECTOR #2 (1-Sec)……….32 NNE @ 12:55 P.M.
DAVIS #1……………….27 NNE @ 12:38 A.M.
DAVIS #2 ………………29 NE @ 12:55 P.M.
RMY #1 (Instantaneous)…..31 NNE @ 11:24 A.M.
RMY #2 (Instantaneous)…..31 NNE @ 12:12 P.M.
MERLIN…………………29 NNE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 NNE @ 12:12 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 12:12 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 12:12 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NNE @ 12:12 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 NE @ 02:38 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 NNE @ 12:12 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NNE @ 12:12 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….12.9 NNE [309 total miles]
VECTOR #1……………..12.6
VECTOR #2……………..13.1
DAVIS #1………………12.8 NNE
DAVIS #2………………12.6 NE
RMY #1………………..12.2 NE
RMY #2………………..12.7 NNE
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..1.03 DEPARTURE…..+0.88
TOTAL PRECIPITATION FOR THE MONTH…………..1.40 DEPARTURE…..-1.31
TOTAL PRECIPITATION FOR THE YEAR (2024)…….42.61 DEPARTURE…..+5.29
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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/…/.. 30 NE VEC1 30 NE RMY 31
9/20 63/58/61/-2/…/…/.. 38 NE VEC1 38 NE RMY 40
9/21 58/55/57/-5/…./…/.. 35 NNE VEC1 31 NNE RMY 31
9/22 The low since midnight is 54F, the daily normal low is 53F.
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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 22
HIGH 90F IN 1895, 1914
LOW 30F IN 1904 (Earliest freeze)
PRECIP 1.16 INCHES IN 2001
PEAK GUST 60 MPH SSW IN 1989
RECORDS FOR SEPTEMBER 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989
TODAY’S REPORT PREPARED BY: Benjamin Turner
