Wednesday, October 11, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, OCTOBER 11, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0552E
SUNSET: 1709E
MIX OF SUN AND CLOUDS, MILD AND DRY…
Today has been an excellent day weather-wise here on the hill,
with dry conditions and a mix of altocumulus and cumulus clouds
dotting the sky.
Temperatures have risen today, reaching the upper 60’s by the
early afternoon. On the other hand, the dew point has been
dropping, beginning in the mid 50s this morning and falling to
the upper 40s as of the last observation, providing a very
comfortable feel outside.
Winds so far have been relatively light, with an average of only
8mph. The predominant direction so far is from the southwest,
and our peak gust of 22mph occurred just before 1:30pm.
Visibility has not been great today, being limited to 30 miles
this morning by thin fog. By the afternoon, it improved to 40
miles, but skies remain hazy.
The maximum temperature so far today has been 68F, which is 5
degrees above the normal high of 63F. The minimum temperature
since midnight is 50F, which is 4 degrees above the normal low
of 46F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus/altostratus, few distant cumulus/towering
cumulus S-SE, thin ground fog
Temperature: 53F; Dew Point: 51F; Relative Humidity: 94%
Wind: SSW @ 7 kts
Sea-level pressure: 1012.5 mb; 29.90 in. Hg: rising, then more slowly
Visibility: 30 miles, thin fog
6-hr Max temp: 53F
6-hr Min temp: 50F
24-hr Precip: Trace
BHO SA 1155 E90 BKN 30 125/53/51/2107/990/ FEW CU/TCU DSNT SE-S
THN F ALQDS PTCHY THN GF ALQDS/ 8/270 51014 70000 10053 20050
10 A.M.
Weather: Scattered altocumulus, few cumulus all quadrants
Temperature: 63F; Dew Point: 49F; Relative Humidity: 60%
Wind: SSW @ 5 kts, wind light
Sea-level pressure: 1012.6 mb; 29.90 in. Hg: rising, then steady
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 100 SCT 40 126/63/49/2105/990/ FEW CU ALQDS HAZY WND LGT/
8/250 51001
1 P.M.
Weather: Broken cumulus, broken altocumulus
Temperature: 68F; Dew Point: 47F; Relative Humidity: 47%
Wind: SW @ 7 kts
Sea-level pressure: 1011.0 mb; 29.85 in. Hg: falling, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 68F
6-hr Min temp: 53F
6-hr Precip: 0.00 inches
BHO SA 1755 E50 BKN 100 BKN 40 110/68/47/2307/985/ HAZY/ 8/260 56016
10068 20053
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SUMMARY FOR TUESDAY, OCTOBER 10, 2023
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..63
MIN…….47 NORMAL…..46
MEAN……56 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH…………………+58 [+5.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….9 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH……………43 DEPARTURE…….-48
TOTAL HEATING UNITS FOR THE SEASON………….142 DEPARTURE…….-66
TOTAL HEATING UNITS LAST SEASON TO DATE……..204 DEPARTURE…….-62
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………15 DEPARTURE…….+10
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE…….+29
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 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)……….E23 W @ 02:19 P.M.
VECTOR #1 (1-Sec)……….22 W @ 02:19 P.M.
VECTOR #2 (1-Sec)……….21 WSW @ 02:14 P.M.
DAVIS #1……………….21 W @ 02:17 P.M.
DAVIS #2 ………………21 S @ 08:23 A.M.
RMY #1 (Instantaneous)…..21 W @ 02:19 P.M.
RMY #2 (Instantaneous)…..21 WSW @ 02:13 P.M.
MERLIN…………………22 W
RICHARDS (C5C) (Inst)……20 @ 02:19 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SSW @ 08:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 @ 02:21 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 02:21 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 W @ 02:21 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 W @ 02:21 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 W @ 02:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 W @ 02:21 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 @ 01:53 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.1 SW [194 total miles]
VECTOR #1……………….8.9
VECTOR #2……………….9.3
DAVIS #1………………..8.5 SSW
DAVIS #2………………..9.0 SW
RMY #1………………….8.7 SW
RMY #2………………….9.4 SW
RICHARDS (C5C)…………..8.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-1.52
TOTAL PRECIPITATION FOR THE YEAR…………..47.38 DEPARTURE…..+7.03
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PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
10/1 68/50/59/+1/0.00/458/65 20 NNE VEC1 20 NNE RMY 19
10/2 68/55/62/+4/0.00/681/97 24 NE VEC1 23 NE RMY 24
10/3 81/54/68/+11/0.00/672/96 18 WSW VEC1 18 WSW RMY 18
10/4 81/64/73/+16/0.00/669/96 17 S VEC1 17 S RMY 16
10/5 77/59/68/+11/0.00/…/.. 24 S VEC1 24 S RMY 23
10/6 71/60/66/+10/0.00/…/.. 20 SE VEC1 19 SE RMY 18
10/7 68/54/61/+5/0.16/…/.. 30 WNW VEC1 29 WNW RMY 29
10/8 63/48/56/+1/0.00/…/.. 30 W VEC1 30 WNW RMY 30
10/9 61/44/53/-2/0.00/…/.. 25 WSW VEC1 24 WSW RMY 25
10/10 64/47/56/+1/T/…/.. 23 W VEC1 22 W RMY 21
10/11 The low since midnight is 50F, the daily normal low is 46F
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OCTOBER 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 OCTOBER 11
HIGH 80F IN 1919,1949
LOW 28F IN 1993
PRECIP 1.36 INCHES IN 2019
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941
RECORDS FOR OCTOBER 12
HIGH 87F IN 1954
LOW 31F IN 1906
PRECIP 1.70 INCHES IN 1948
SNOWFALL TRACE IN 1904, 1941
PEAK GUST 55 MPH NW IN 1963
TODAY’S REPORT PREPARED BY: Joshua Polen/Matt Douglas
