Tuesday, October 10, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, OCTOBER 10, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0551E
SUNSET: 1711E
MORE CLOUDS THAN SUN AND SEASONABLE TODAY WITH A FEW SPOT SHOWERS…
Clouds have been pretty dominant today with a few breaks of sun,
mainly early this morning. A few spot showers have passed over
the hill as well, but only a trace of rain was left behind in
the gauge. All in all it’s not a bad day, but certainly not of
the great calibur that we saw on Sunday and Monday.
Temperatures remain on the cooler side with readings reaching
the low to mid 60s. The dew point has been on the increase
today, rising from the low 40s to low 50s, but it’s still well
within the comfortable range.
The wind has been mainly on the light side out of a southerly
direction. The average speed so far has been around 9mph, but
it has shown some signs of picking up a bit at times during
the day. The peak gust thus far is around 20mph.
Visibility has been decreasing today. It started off at around
60 miles early this morning, but has dropped to around 40-50
miles by early this afternoon.
The maximum temperature so far today has been 64F, which is 1
degree above the normal high of 63F. The minimum temperature
since midnight is 47F, which is 1 degree above the normal low
of 46F.
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Today’s Observations:
7 A.M.
Weather: Overcast altostratus/altocumulus, few breaks in overcast
all quadrants, few stratocumulus distant SE-S
Temperature: 49F; Dew Point: 41F; Relative Humidity: 73%
Wind: SSE @ 5 kts, wind light
Sea-level pressure: 1011.6 mb; 29.87 in. Hg: steady, then rising
Visibility: 60 miles
6-hr Max temp: 51F
6-hr Min temp: 47F
24-hr Precip: 0.00 inches
BHO SA 1155 E80 OVC 60 116/49/41/1605/987/ FEW BINOVC ALQDS
FEW SC DSNT SE-S VIRGA DSNT SSW-WSW WND LGT/ 8/57/ 53006 10051 20047
10 A.M.
Weather: Broken altocumulus, broken cirrus, few cumulus all quadrants,
few stratocumulus all quadrants
Temperature: 56F; Dew Point: 48F; Relative Humidity: 74%
Wind: SSE @ 7 kts
Sea-level pressure: 1011.0 mb; 29.85 in. Hg: steady, then falling
Visibility: 40 miles
3-hr Precip: Trace
BHO SA 1455 E80 BKN 250 BKN 40 110/56/48/1607/985/ FEW CU ALQDS
FEW SC ALQDS VIRGA DSNT NE-SSE HAZY/ 8/871 58006 6000/
1 P.M.
Weather: Broken cumulus/cumulonimbus, broken altocumulus, broken cirrus
cumulonimbus N-NE moving NE, towering cumulus all quadrants
Temperature: 59F; Dew Point: 51F; Relative Humidity: 75%
Wind: WSW @ 6 kts, wind light
Sea-level pressure: 1009.5 mb; 29.81 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 64F
6-hr Min temp: 49F
6-hr Precip: Trace
BHO SA 1755 E35 BKN 85 BKN 250 BKN 50 095/59/51/2406/981/
CB N-NE MOV NE TCU ALQDS VIRGA DSNT ALQDS RW-B01E26B41E54
WND LGT/ 8/361 58015 6000/ 10064 20049
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SUMMARY FOR MONDAY, OCTOBER 9, 2023
TEMPERATURE (DEGREES F)
MAX…….61 NORMAL…..64
MIN…….44 NORMAL…..47
MEAN……53 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-2
TOTAL DEPARTURE FOR THE MONTH…………………+57 [+6.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………12 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………34 DEPARTURE…….-46
TOTAL HEATING UNITS FOR THE SEASON………….133 DEPARTURE…….-65
TOTAL HEATING UNITS LAST SEASON TO DATE……..194 DEPARTURE…….-61
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…….+11
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)……….E25 WSW @ 10:55 A.M.
VECTOR #1 (1-Sec)……….24 WSW @ 10:55 A.M.
VECTOR #2 (1-Sec)……….25 WSW @ 10:55 A.M.
DAVIS #1……………….24 SW @ 10:55 A.M.
DAVIS #2 ………………26 SW @ 10:55 A.M.
RMY #1 (Instantaneous)…..25 WSW @ 10:55 A.M.
RMY #2 (Instantaneous)…..27 WSW @ 10:55 A.M.
MERLIN…………………23 SW
RICHARDS (C5C) (Inst)……24 @ 10:55 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SW @ 11:03 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 11:01 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 11:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 SW @ 11:01 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 WSW @ 10:55 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SW @ 11:01 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 SW @ 11:01 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 10:55 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.5 SW [227 total miles]
VECTOR #1………………10.0
VECTOR #2………………10.5
DAVIS #1………………..9.6 SW
DAVIS #2……………….10.4 SW
RMY #1…………………10.0 SW
RMY #2…………………10.6 SW
RICHARDS (C5C)…………..9.5
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-1.35
TOTAL PRECIPITATION FOR THE YEAR…………..47.38 DEPARTURE…..+7.20
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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 The low since midnight is 47F, 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 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958
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
TODAY’S REPORT PREPARED BY: Matt Douglas
