Thursday, October 12, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, OCTOBER 12, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0553E
SUNSET: 1707E
SPECTACULAR FALL DAY WITH SUNSHINE, MILD TEMPS, AND DRY AIR…
Today is another excellent weather day with mainly sunny skies
this morning filling with mainly fair weather cumulus clouds this
afternoon. Varying amounts of altocumulus have also moved across
the sky at times today as well.
The air is very comfortable with temperatures reaching the upper
60’s and low 70s early this afternoon, with dew point readings
gradually increasing from the low 40s to the mid 40s. Today is a
perfect day for hiking or other outdoor activities!
Winds have been light today with an average speed of only around
4mph. While the direction has been varying at times, the
prevailing direction has been from the west so far. The peak
gust so far has only been around 16mph, rather anemic to say
the least.
Visibility has been decent with a view of around 50 miles.
The maximum temperature so far today has been 70F, which is 8
degrees above the normal high of 62F. The minimum temperature
since midnight is 51F, which is 6 degrees above the normal low
of 45F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus/castellanus
Temperature: 55F; Dew Point: 43F; Relative Humidity: 64%
Wind: W @ 4 kts, wind light
Sea-level pressure: 1013.5 mb; 29.93 in. Hg: steady, then rising
Visibility: 50 miles
6-hr Max temp: 55F
6-hr Min temp: 51F
24-hr Precip: 0.00 inches
BHO SA 1155 85 SCT 50 135/55/43/2704/993/ WND LGT/ 8/080 53005
10055 20051
10 A.M.
Weather: Clear, few cumulus distant all quadrants, few altocumulus
distant all quadrants
Temperature: 63F; Dew Point: 46F; Relative Humidity: 53%
Wind: WSW @ 2 kts, wind light and variable
Sea-level pressure: 1013.1 mb; 29.92in. Hg: rising, then falling
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 50 131/63/46/2402/992/ FEW CU DSNT ALQDS FEW AC DSNT
ALQDS WND L/V/ 8/250 58004
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus
Temperature: 68F; Dew Point: 46F; Relative Humidity: 45%
Wind: SW @ 7 kts
Sea-level pressure: 1011.6 mb; 29.87 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 70F
6-hr Min temp: 55F
6-hr Precip: 0.00 inches
BHO SA 1755 E55 BKN 75 BKN 250 BKN 50 116/68/46/2307/987/
8/261 58015 10070 20055
————————————————————–
SUMMARY FOR WEDNESDAY, OCTOBER 11, 2023
TEMPERATURE (DEGREES F)
MAX…….68 NORMAL…..63
MIN…….50 NORMAL…..46
MEAN……59 NORMAL…..54
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+63 [+5.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….6 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH……………49 DEPARTURE…….-53
TOTAL HEATING UNITS FOR THE SEASON………….148 DEPARTURE…….-71
TOTAL HEATING UNITS LAST SEASON TO DATE……..214 DEPARTURE…….-66
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 SSW @ 06:34 P.M.
VECTOR #1 (1-Sec)……….22 SW @ 01:29 P.M.
VECTOR #2 (1-Sec)……….22 SSW @ 06:45 P.M.
DAVIS #1……………….23 S @ 06:33 P.M.
DAVIS #2 ………………24 S @ 06:31 P.M.
RMY #1 (Instantaneous)…..22 SSW @ 04:32 P.M.
RMY #2 (Instantaneous)…..22 SSW @ 06:45 P.M.
MERLIN…………………20 S
RICHARDS (C5C) (Inst)……21 @ 04:32 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SSW @ 06:59 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 @ 06:34 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 06:34 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 W @ 09:12 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 S @ 06:34 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 SSW @ 06:34 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 SSW @ 06:34 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 @ 06:34 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.3 SSW [199 total miles]
VECTOR #1………………9.1
VECTOR #2………………9.6
DAVIS #1……………….8.8 SW
DAVIS #2……………….9.4 SW
RMY #1…………………8.9 SW
RMY #2…………………9.7 SW
RICHARDS (C5C)………….8.9
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…..-1.70
TOTAL PRECIPITATION FOR THE YEAR…………..47.38 DEPARTURE…..+6.85
————————————————————–
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/+11/0.00/638/92 24 S VEC1 24 S RMY 23
10/6 71/60/66/+10/0.00/269/39 20 SE VEC1 19 SE RMY 18
10/7 68/54/61/+5/0.16/007/01 30 WNW VEC1 29 WNW RMY 29
10/8 63/48/56/+1/0.00/651/95 30 W VEC1 30 WNW RMY 30
10/9 61/44/53/-2/0.00/532/78 25 WSW VEC1 24 WSW RMY 25
10/10 64/47/56/+1/T/245/36 23 W VEC1 22 W RMY 21
10/11 68/50/59/+5/0.00/393/58 23 SSW VEC1 22 SW RMY 22
10/12 The low since midnight is 51F, the daily normal low is 45F
————————————————————–
OCTOBER DAILY RECORDS TO DATE
.NONE…
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR OCTOBER 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.87 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950
TODAY’S REPORT PREPARED BY: Matt Douglas
