Monday, August 12, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, AUGUST 12, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0449E
SUNSET: 1849E
A CLEAR START TO THE DAY, BUILDING CONVECTIVE CLOUDS EARLY THIS
AFTERNOON….
The great weather continues with refreshingly low humidity levels
and very comfortable temperatures. Skies were clear to the start
the day, but cumulus clouds have developed with diurnal heating
doing it’s thing. Some cirrus clouds have been observed as well.
Temperatures started the day in the upper 50s, but have warmed
nicely into the mid to upper 70s early this afternoon. The dew
point has been holding in the mid 50s all day. This is just
splendid air for this time of year.
The wind was gusty overnight, but diminished during the course
of the morning, becoming light for a time. It has since picked
back up early this afternoon thanks to the atmosphere mixing air
down from aloft. The average speed for the day so far is around
10mph. The peak gust so far for the day is 29mph, which occurred
after the 1pm observation.
Visibility has been great, with a view of 60-70 miles all day!
The maximum temperature so far today is 77F, which is 4 degrees
below the normal high of 81F. The minimum temperature since
midnight is 59F, which is 4 degrees below the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant NW, few cirrus all quadrants
Temperature: 64F; Dew Point: 56F; Relative Humidity: 74%
Wind: W @ 9 kts
Sea-level pressure: 1014.7 mb ; 29.96 in. Hg: rising, then falling
Visibility: 70 miles
6-hr Max temp: 64F
6-hr Min temp: 59F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 147/64/56/2809/996/ FEW SC DSNT NW FEW CI ALQDS/
8/501 50007 10064 20059
10 A.M.
Weather: Clear, few cumulus all quadrants, few cirrus all quadrants
Temperature: 73F; Dew Point: 57F; Relative Humidity: 57%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 151/73/57/2606/998/ FEW CU ALQDS FEW CI ALQDS
WND LGT/ 8/201 50004
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus
Temperature: 75F; Dew Point: 57F; Relative Humidity: 53%
Wind: W @ 10G20 kts
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 77F
6-hr Min temp: 64F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 70 BKN 250 BKN 60 139/75/57/2710G20/994/ 8/261
58012 10077 20064
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SUMMARY FOR SUNDAY, AUGUST 11, 2024
TEMPERATURE (DEGREES F)
MAX…….81 NORMAL…..81
MIN…….63 NORMAL…..63
MEAN……72 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………0
TOTAL DEPARTURE FOR THE MONTH…………………….+23 [+1.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….2 DEPARTURE………0
TOTAL HEATING UNITS FOR THE SEASON……………2 DEPARTURE……..-7
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE……..+2
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….7 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………..109 DEPARTURE…….+24
TOTAL COOLING UNITS FOR THE SEASON………….606 DEPARTURE……+134
TOTAL COOLING UNITS LAST SEASON TO DATE……..488 DEPARTURE……+118
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)……….E30 W @ 10:53 P.M.
VECTOR #1 (1-Sec)……….29 SW @ 01:08 P.M.
VECTOR #2 (1-Sec)……….28 W @ 10:49 P.M.
DAVIS #1……………….29 W @ 10:53 P.M.
DAVIS #2 ………………27 SW @ 01:05 P.M.
RMY #1 (Instantaneous)…..30 SW @ 01:08 P.M.
RMY #2 (Instantaneous)…..27 W @ 10:53 P.M.
MERLIN…………………28 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SW @ 02:29 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 10:54 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 01:28 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 W @ 10:54 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SW @ 01:28 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 W @ 10:54 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SW @ 01:25 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.5 SW [228 total miles]
VECTOR #1……………..9.8
VECTOR #2…………….10.4
DAVIS #1………………9.7 WSW
DAVIS #2………………9.8 W
RMY #1………………..9.6 W
RMY #2……………….10.3 WSW
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…………..1.89 DEPARTURE…..+0.44
TOTAL PRECIPITATION FOR THE YEAR (2024)…….40.14 DEPARTURE…..+7.99
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PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
8/1 92/71/82/+9/T/779/90 24 W VEC1 24 W RMY 23
8/2 94/73/84/+11/0.01/579/67 31 SSW VEC1 31 SSW RMY 30 TSTM
8/3 92/75/84/+11/0.00/612/71 29 W VEC1 28 W RMY 28
8/4 85/68/77/+4/0.20/318/37 29 WSW VEC1 29 WSW RMY 31 TSTM
8/5 90/67/79/+6/T/686/80 28 SSW VEC1 28 SSW RMY 29
8/6 73/60/67/-6/0.56/009/01 26 ENE VEC1 26 ENE RMY 26
8/7 69/57/63/-10/0.18/119/14 25 NE VEC1 23 NE RMY 23
8/8 72/58/65/-7/0.09/187/22 20 ESE VEC1 20 ESE RMY 19
8/9 82/62/72/0/0.48/…/.. 50 SSW VEC1 48 S RMY 50
8/10 85/68/77/+5/0.37/…/.. 41 SSW VEC1 41 SSW RMY 43
8/11 81/63/72/0/0.00/…/.. 30 W VEC1 29 SW RMY 30
8/12 The low since midnight is 59F, the daily normal low is 63F.
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AUGUST DAILY RECORDS TO DATE
8/3 RECORD HIGH MINIMUM TEMPERATURE OF 75F,
TIED THE PREVIOUS RECORD SET IN 2020
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983
RECORDS FOR AUGUST 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963
TODAY’S REPORT PREPARED BY: Matt Douglas
