Sunday, August 13, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, AUGUST 13, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0449E
SUNSET: 1848E
HUMID DAY BEGINNING WITH FOG, CHANGING TO PARTLY CLOUDY, AND
THEN SWITCHING TO SCATTERED THUNDERSTORMS IN THE AFTERNOON…
Today’s weather has been slightly chaotic with fog and rain in
the early morning, changing to partly cloudy conditions for a
majority of the late morning and early afternoon and thunder-
storms forming to our west and moving into the area from about
1:30 PM through now, about 3:09 PM. Storms continue to develop
to our west with impressive anvils on the horizon.
Visibility has remained at or below about 50 miles for a majority
of the day. Right now, Wachusett is being hidden by a storm that
just formed about 30 miles to our WNW. We are anticipating
scattered thunderstorms to persist for the next few hours in
Massachusetts.
Our high temperature so far today has been 83F, which is three
degrees higher than our normal high for today of 80F. Our low
since midnight was 68F, which is 5 degrees above our normal low
for today of 63F.
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Today’s Observations:
7 A.M.
Weather: Fog
Temperature: 69F; Dew Point: 69F; Relative Humidity: 100%
Wind: SSW @ 5 kts
Sea-level pressure: 1012.0 mb; 29.88 in. Hg: rising then falling
Visibility: 1/8 mile
6-hr Max temp: 70F
6-hr Min temp: 68F
24-hr Precip: 0.07 ins.
BHO SA 1155 X W2 1/8 120/69/69/2105/988/ 8//// 50009 70007 10070 20068
10 A.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 77F; Dew Point: 68F; Relative Humidity: 72%
Wind: SSW @ 10 kts
Sea-level pressure: 1011.6 mb; 29.87 in. Hg: falling unsteadily
Visibility: 40 miles
3-hr Precip: 0.00 inches
BHO SA 1455 20 SCT 140 SCT 40 116/77/68/2110/987/ 8/230 57004
1 P.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 81F; Dew Point: 70F; Relative Humidity: 69%
Wind: SSW @ 11 kts
Sea-level pressure: 1010.0 mb; 29.82 in. Hg: falling unsteadily
Visibility: 40 miles
6-hr Max temp: 83F
6-hr Min temp: 69F
6-hr Precip: 0.00 inches
BHO SA 1755 20 SCT 80 SCT 40 100/81/70/2111/982/ 8/230 57016
10083 20069
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SUMMARY FOR SATURDAY, AUGUST 12, 2023
TEMPERATURE (DEGREES F)
MAX…….84 NORMAL…..81
MIN…….61 NORMAL…..63
MEAN……73 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH…………………-17 [-1.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….8 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………74 DEPARTURE…….-18
TOTAL COOLING UNITS FOR THE SEASON………….496 DEPARTURE…….+17
TOTAL COOLING UNITS LAST SEASON TO DATE……..676 DEPARTURE……-180
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E25 SSW @ 06:37 P.M.
VECTOR #1 (1-Sec)……….26 SSW @ 06:37 P.M.
VECTOR #2 (1-Sec)……….27 SSW @ 04:46 P.M.
DAVIS #1……………….28 S @ 09:52 P.M.
DAVIS #2 ………………31 S @ 10:00 P.M.
RMY #1 (Instantaneous)…..26 SSW @ 04:45 P.M.
RMY #2 (Instantaneous)…..29 SSW @ 04:46 P.M.
MERLIN…………………24 SSW
RICHARDS (C5C) (Inst)……26 @ 04:45 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SSW @ 04:49 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 04:40 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 04:47 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 S @ 04:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 04:39 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SSW @ 04:49 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW @ 04:46 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 04:49 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.8 SSW [212 total miles]
VECTOR #1……………….9.4
VECTOR #2………………10.1
DAVIS #1………………..9.0 SSW
DAVIS #2……………….10.0 SSW
RMY #1………………….9.2 SW
RMY #2…………………10.1 SW
RICHARDS (C5C)…………..9.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.07 DEPARTURE…..-0.05
TOTAL PRECIPITATION FOR THE MONTH…………..0.77 DEPARTURE…..-0.80
TOTAL PRECIPITATION FOR THE YEAR…………..35.54 DEPARTURE…..+3.27
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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 76/58/67/-6/0.00/763/88 24 NW VEC1 24 NW RMY 24
8/2 75/54/65/-8/0.00/830/96 23 SSW VEC1 22 SSW RMY 23
8/3 79/59/69/-4/0.00/725/84 32 SSW VEC1 34 SSW RMY 34
8/4 77/62/70/-3/T/172/20 29 SSW VEC1 29 SSW RMY 29
8/5 83/66/75/+2/0.00/523/61 18 NW VEC1 16 WNW RMY 17
8/6 82/60/71/-2/0.00/839/98 20 W VEC1 19 W RMY 19
8/7 72/65/69/-4/0.14/034/04 29 SSE VEC1 30 SSE RMY 29
8/8 82/68/75/+3/0.47/187/22 39 S VEC1 42 S RMY 42
8/9 82/66/74/+2/0.00/756/89 39 WNW VEC1 38 WNW RMY 38
8/10 83/64/74/+2/0.02/254/30 28 SSW VEC1 27 SSW RMY 28
8/11 80/63/72/+0/0.07/…/.. 36 W VEC1 36 W RMY 38
8/12 84/61/73/+1/0.00/…/.. 25 SSW VEC1 26 SSW RMY 26
8/13 The low since midnight is 61F, the daily normal low is 63F
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963
TODAY’S REPORT PREPARED BY: Samantha Richard
