Wednesday, September 11, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, SEPTEMBER 11, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0520E
SUNSET: 1800E
RINSE AND REPEAT, DRY SPELL CONTINUES WITH PLENTY OF SUNSHINE….
With only 0.04″ of rain for the month to date (we’re now 1/3rd of
the way through the month), we are now running a 1.15″ deficit in
the rainfall department. There is currently no rain in sight
over the next week, so this dry spell looks to continue. It will
be interesting to see what the Drought Monitor shows tomorrow
morning for the region.
At any rate, today is yet another great weather day with plenty
of sunshine and near seasonal temperatures. I know, these
discussions have become broken records lately, it kind of feels
like San Diego.
Temperatures have reached the mid-upper 70s early this afternoon
with dew point values that are mainly holding in the 40s.
Winds are quite light, and at times variable today. It was mainly
out of the northeast to east earlier when it would puff up a bit,
but has recently shifted to the south. The average speed for the
day so far is only around 7mph. The peak gust so far for the day
is only 15mph, which occurred before 1am this morning.
Visibility has once again been excellent with the view holding at
around 70 miles most of the day.
The maximum temperature so far today is 76F, which is 1 degree
above the normal high of 75F. The minimum temperature since
midnight is 53F, which is 4 degrees below the normal low of 57F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant ESE-SW-WNW, thin smoke layer aloft
all quadrants
Temperature: 59F; Dew Point: 44F; Relative Humidity: 56%
Wind: N @ 7 kts
Sea-level pressure: 1023.4 mb; 30.22 in. Hg: rising steadily
Visibility: 70 miles
6-hr Max temp: 59F
6-hr Min temp: 53F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 234/59/44/3607/022/ FEW CI DSNT ESE-SW-WNW
THN K LYR ALF ALQDS/ 8/001 52015 10059 20053
10 A.M.
Weather: Thin scattered cirrus, thin smoke layer aloft all quadrants
Temperature: 70F; Dew Point: 48F; Relative Humidity: 45%
Wind: NNE @ 3 kts, wind light
Sea-level pressure: 1023.9 mb; 30.24 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 250 -SCT 70 239/70/48/0303/024/ THN K LYR ALF ALQDS
WND LGT/ 8/001 51005
1 P.M.
Weather: Thin scattered cirrus, thin smoke layer aloft all quadrants
Temperature: 75F; Dew Point: 47F; Relative Humidity: 37%
Wind: S @ 5 kts, wind light
Sea-level pressure: 1023.2 mb; 30.22 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 76F
6-hr Min temp: 59F
6-hr Precip: 0.00 inches
BHO SA 1755 250 -SCT 70 232/75/47/1805/022/ THN K LYR ALF ALQDS
WND LGT/ 8/001 58007 10076 20059
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SUMMARY FOR TUESDAY, SEPTEMBER 10, 2024
TEMPERATURE (DEGREES F)
MAX…….78 NORMAL…..75
MIN…….56 NORMAL…..58
MEAN……67 NORMAL…..66
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1
TOTAL DEPARTURE FOR THE MONTH…………………….-13 [-1.5 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……..-3
TOTAL HEATING UNITS FOR THE SEASON…………..21 DEPARTURE…….-10
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+18
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….2 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………24 DEPARTURE…….-16
TOTAL COOLING UNITS FOR THE SEASON………….718 DEPARTURE…….+82
TOTAL COOLING UNITS LAST SEASON TO DATE……..670 DEPARTURE…….+48
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 NW @ 09:58 A.M.
VECTOR #1 (1-Sec)……….20 SW @ 12:03 A.M.
VECTOR #2 (1-Sec)……….21 NW @ 09:58 A.M.
DAVIS #1……………….18 SW @ 12:34 A.M.
DAVIS #2 ………………19 SW @ 12:33 A.M.
RMY #1 (Instantaneous)…..21 SW @ 12:03 A.M.
RMY #2 (Instantaneous)…..22 NW @ 09:58 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SW @ 12:49 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 12:18 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 12:39 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 SSW @ 12:05 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 WSW @ 12:34 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 SW @ 12:18 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 SW @ 12:34 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.6 NW [207 total miles]
VECTOR #1………………8.9
VECTOR #2………………9.4
DAVIS #1……………….9.0 WNW
DAVIS #2……………….9.2 NW
RMY #1…………………8.8 WNW
RMY #2…………………9.3 WNW
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…..-1.15
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.25 DEPARTURE…..+5.45
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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/…/.. 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/…/.. 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/…/.. 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/…/.. 35 W VEC1 35 W RMY 34
9/9 75/51/63/-4/0.00/…/.. 31 WNW VEC1 28 WNW RMY 30
9/10 78/56/67/+1/0.00/…/.. 21 NW VEC1 20 SW RMY 21
9/11 The low since midnight is 53F, the daily normal low is 57F.
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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 11
HIGH 93F IN 1983, 2013
LOW 37F IN 1917
PRECIP 5.23 INCHES IN 1954 (HURRICANE EDNA)
PEAK GUST 101 MPH NW IN 1954 (HURRICANE EDNA)
RECORDS FOR SEPTEMBER 12
HIGH 92F IN 1961
LOW 42F IN 1958,1967,1985
PRECIP 2.79 INCHES IN 1960 (HURRICANE DONNA)
PEAK GUST 140 MPH SSE IN 1960 (HURRICANE DONNA)
TODAY’S REPORT PREPARED BY: Matt Douglas
