Friday, September 27, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, SEPTEMBER 27, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0538E
SUNSET: 1732E
MORNING CLOUDS MOVE OUT AS SUNSHINE AND HIGH PRESSURE SYSTEM
BRINGS ABOVE NORMAL TEMPERATURES….
Yesterday’s rain brought in 0.42 inches which puts us at 1.83 inches
for the month so far. We are still 1.62 inches below normal for
September but 4.98 inches above for the year.
Temperatures have rebounded nicely with the reappearance of the sun
today. A high pressure system has been building to our north which
is helping us dry out nicely. Because of this we are well above the
normal temperatures for today. Dew points started off in the 60’s but
have since dropped into the mid 50’s which has given a very comfortable
feel in the air.
We started the day with a south-westerly flow that has shifted to a
north to north westerly flow. With the wind shift came a decrease in
intensity as well. The average speed for the day so far is around 5mph.
The peak gust for the day so far is 17mph, which occurred around 12:20pm
Visibility has been holding steady at a spectacular 70 miles all day.
It has been an absolutely beautiful viewing day.
The maximum temperature so far today is 76F, which is 8 degrees above
the normal high of 68F. The minimum temperature since midnight is 60F,
which is 9 degrees above the normal low of 51F.
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Today’s Observations:
7 A.M.
Weather: Overcast altocumulus, few breaks in overcast distant ESE-SE,
few lower stratus fractus SSE-SSW, clearing line distant WNW-ENE
Temperature: 60F; Dew Point: 60F; Relative Humidity: 100%
Wind: NW @ 5 kts, wind light
Sea-level pressure: 1017.3 mb; 30.04 in. Hg: rising, then more
rapidly
Visibility: 70 miles, patchy ground fog W
6-hr Max temp: 60F
6-hr Min temp: 60F
24-hr Precip: 0.42 inches
BHO SA 1155 OVC 70 173/60/60/3105/004/ FEW BINOVC DSNT ESE-SE
FEW LWR STFRA SSE-SSW CLRG LINE DSNT WNW-N-ENE PTCHY GF W WND LGT/
8/08/ 53007 6000/ 70042 10060 20060
10 A.M.
Weather: Thinly Scattered cirrus, few stratocumulus distant E-S-NW,
few altocumulus ESE-S-W
Temperature: 69F; Dew Point: 59F; Relative Humidity: 72%
Wind: NW @ 4 kts, wind light
Sea-level pressure: 1016.8 mb; 30.04 in. Hg: falling, then more
rapidly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 250 SCT 70 168/69/59/3104/003/ FEW SC DSNT E-S-NW
FEW AC ESE-S-W WND LGT/ 8/551 58005
1 P.M.
Weather: Thinly scattered cirrus, few small cumulus all quadrants,
few altocumulus distant ESE-S-W
Temperature: 75F; Dew Point: 56F; Relative Humidity: 54%
Wind: NW @ 5 kts, wind light
Sea-level pressure: 1015.5 mb; 29.99 in. Hg: falling, then more
rapidly
Visibility: 70 miles
6-hr Max temp: 75F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 250 -SCT 70 155/75/56/3005/999/ FEW SML CU ALQDS
FEW AC/ACC DSNT ESE-S-W WND LGT/ 8/181 58013 10076 20060
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SUMMARY FOR THURSDAY, SEPTEMBER 26, 2024
TEMPERATURE (DEGREES F)
MAX…….67 NORMAL…..69
MIN…….56 NORMAL…..52
MEAN……62 NORMAL…..60
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+2
TOTAL DEPARTURE FOR THE MONTH……………………..+8 [ 0.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….3 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………52 DEPARTURE…….-21
TOTAL HEATING UNITS FOR THE SEASON…………..63 DEPARTURE…….-28
TOTAL HEATING UNITS LAST SEASON TO DATE………62 DEPARTURE……..+1
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…….-12
TOTAL COOLING UNITS FOR THE SEASON………….753 DEPARTURE…….+86
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)……….E26 S @ 05:19 P.M.
VECTOR #1 (1-Sec)……….26 S @ 05:19 P.M.
VECTOR #2 (1-Sec)……….26 SSW @ 05:44 P.M.
DAVIS #1……………….29 S @ 01:13 P.M.
DAVIS #2 ………………31 S @ 01:16 P.M.
RMY #1 (Instantaneous)…..29 S @ 05:19 P.M.
RMY #2 (Instantaneous)…..27 SSW @ 02:16 P.M.
MERLIN…………………25 S
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW @ 05:52 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 05:21 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 05:52 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 S @ 05:21 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 05:23 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SW @ 05:58 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SSW @ 05:52 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..9.6 SE [230 total miles]
VECTOR #1……………..10.1
VECTOR #2……………..10.7
DAVIS #1……………….9.7 S
DAVIS #2………………10.6 S
RMY #1…………………9.7 SSE
RMY #2………………..10.8 SSE
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.42 DEPARTURE…..+0.28
TOTAL PRECIPITATION FOR THE MONTH…………..1.83 DEPARTURE…..-1.62
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.04 DEPARTURE…..+4.98
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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/058/08 28 ENE VEC1 27 NE RMY 27
9/24 61/51/56/-5/0.01/087/12 25 ENE VEC1 22 ENE RMY 24
9/25 65/56/61/0/0.00/029/04 18 E VEC1 18 ESE RMY 18
9/26 67/56/62/+2/0.42/…/.. 26 S VEC1 26 S RMY 29
9/27 The low since midnight is 60F, the daily normal low is 51F.
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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 27
HIGH 86F IN 2017
LOW 32F IN 1947
PRECIP 2.26 INCHES IN 1962
PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA)
RECORDS FOR SEPTEMBER 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962
TODAY’S REPORT PREPARED BY: Amanda Joly
