Thursday, September 12, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, SEPTEMBER 12, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0522E
SUNSET: 1758E
THE DRY SPELL CONTINUES WITH PLENTY OF SUNSHINE AND WARMER
TEMPERATURES….
With only 0.04″ of rain for the month to date, we are now running
a 1.27″ deficit in the rainfall department. There is still no
rain in sight over the next week or so, as such this dry spell
looks to continue. This morning’s Drought Monitor still indicates
no drought locally, but abnormally dry conditions are showing
up in parts of Essex and Nantucket counties. I would have to
imagine these conditions will begin to spread across the region
soon if the current weather pattern persists.
At any rate, today is yet another great weather day with plenty
of sunshine and slightly above normal temperatures.
Temperatures have reached the low 80s early this afternoon, which
is now considered above normal as the normal high for this part of
the year is in the mid 70s. The dew point is a bit higher than
yesterday with values running in the mid 50s.
Winds were again quite light this morning mainly out of a west to
southwesterly direction. However it has picked up a bit early
this afternoon with more of a southerly component. The average
speed for the day so far is only around 7mph. The peak gust so far
for the day is 18mph, which occurred before the 1pm observation
period.
Visibility has once again been decent with the view holding at
around 60 miles most of the day.
The maximum temperature so far today is 81F, which is 6 degrees
above the normal high of 75F. The minimum temperature since
midnight is 58F, which is 1 degree above the normal low of 57F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant NW-N, thin smoke layer aloft
all quadrants
Temperature: 61F; Dew Point: 55F; Relative Humidity: 80%
Wind: WSW @ 5 kts, wind light
Sea-level pressure: 1025.5 mb; 30.28 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 61F
6-hr Min temp: 58F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 255/61/55/2405/028/ FEW CI DSNT NW-N THN K LYR
ALF ALQDS WND LGT/ 8/001 51010 10061 20058
10 A.M.
Weather: Clear, few cirrus all quadrants, thin smoke layer aloft
all quadrants
Temperature: 74F; Dew Point: 55F; Relative Humidity: 51%
Wind: SW @ 5 kts, wind light
Sea-level pressure: 1026.3 mb; 30.31 in. Hg: rising steadily
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 60 263/74/55/2305/031/ FEW CI ALQDS THN K LYR ALF
ALQDS WND LGT/ 8/001 52008
1 P.M.
Weather: Clear, few cumulus distant NW, few cirrus distant NE-E,
thin smoke layer aloft all quadrants
Temperature: 81F; Dew Point: 56F; Relative Humidity: 42%
Wind: SSW @ 7G14 kts
Sea-level pressure: 1025.0 mb; 30.27 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 81F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 60 250/81/56/2007G14/027/ FEW CU DSNT NW FEW CI DSNT
NE-E THN K LYR ALF ALQDS/ 8/201 58013 10081 20061
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SUMMARY FOR WEDNESDAY, SEPTEMBER 11, 2024
TEMPERATURE (DEGREES F)
MAX…….78 NORMAL…..75
MIN…….53 NORMAL…..57
MEAN……66 NORMAL…..66
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………0
TOTAL DEPARTURE FOR THE MONTH…………………….-13 [-1.4 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……..-5
TOTAL HEATING UNITS FOR THE SEASON…………..21 DEPARTURE…….-12
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+18
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….1 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH……………25 DEPARTURE…….-18
TOTAL COOLING UNITS FOR THE SEASON………….719 DEPARTURE…….+80
TOTAL COOLING UNITS LAST SEASON TO DATE……..676 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)……….E20 S @ 08:30 P.M.
VECTOR #1 (1-Sec)……….19 S @ 08:30 P.M.
VECTOR #2 (1-Sec)……….19 S @ 07:36 P.M.
DAVIS #1……………….18 S @ 07:53 P.M.
DAVIS #2 ………………23 S @ 07:08 P.M.
RMY #1 (Instantaneous)…..18 S @ 08:30 P.M.
RMY #2 (Instantaneous)…..19 S @ 08:03 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 S @ 08:18 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 07:22 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 08:03 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 S @ 08:59 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S @ 07:37 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 S @ 08:13 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 S @ 08:03 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..7.1 SSW [170 total miles]
VECTOR #1………………7.8
VECTOR #2………………8.1
DAVIS #1……………….7.4 SSE
DAVIS #2……………….7.8 SE
RMY #1…………………7.5 SE
RMY #2…………………8.1 ESE
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.04 DEPARTURE…..-1.27
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.25 DEPARTURE…..+5.33
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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 The low since midnight is 58F, 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 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)
RECORDS FOR SEPTEMBER 13
HIGH 91F IN 1957
LOW 40F IN 1985
PRECIP 3.10 INCHES IN 1987
PEAK GUST 44 MPH WNW IN 1986
TODAY’S REPORT PREPARED BY: Matt Douglas
