Friday, October 13, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, OCTOBER 13, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0554E
SUNSET: 1706E
A WONDERFUL START TO THE WEEKEND WITH COOLER, MORE SEASONAL TEMPS
AND BREEZY CONDITIONS ON GREAT BLUE HILL TODAY…
Today has been significantly cooler than yesterday, with very
breezy conditions and continued dry air. Skies have been mostly
clear with distant cumulus clouds this morning and began to
slowly fill in the sky as temperatures gradually increased early
this afternoon.
We started off a bit chilly this morning with temperatures in the
mid 40’s and by our last observation we just made it to 60F. The
strong NW flow and the dry air (with dew points in the low 40’s)
have kept the temperatures on the cooler side. Although breezy,
it’s been a gorgeous day for being outdoors.
Winds have steadily increased since this morning. We have had an
average speed of about 11mph with winds out of the NNW and NW. Our
peak gust so far has been about 30mph, which occurred just after
12:30pm.
Visibility has been at a phenomenal 70 miles throughout the day.
Low relative humidity, dew points, and clear skies have made it
a great day for scenic views of the New England fall scenery.
The maximum temperature so far today has been 60F, which is 2
degrees below the normal high of 62F. The minimum temperature
since midnight is 43F, which is 2 degrees below the normal low
of 45F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cumulus distant NW-N, few altocumulus distant
NNE-E-SW
Temperature: 44F; Dew Point: 41F; Relative Humidity: 90%
Wind: NW @ 8 kts
Sea-level pressure: 1013.7 mb; 29.94 in. Hg: steady, then rising
Visibility: 70 miles
6-hr Max temp: 50F
6-hr Min temp: 43F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 137/44/41/3108/994/ FEW CU DSNT NW-N
FEW AC DSNT NNE-E-SW 8/150 53009 10050 20043
10 A.M.
Weather: Clear, few cumulus distant all quadrants
Temperature: 55F; Dew Point: 40F; Relative Humidity: 54%
Wind: NW @ 12 kts
Sea-level pressure: 1013.3 mb; 29.92in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 133/55/40/3212/992/ FEW CU DSNT ALQDS 8/100 58004
1 P.M.
Weather: Clear, few cumulus all quadrants
Temperature: 60F; Dew Point: 40F; Relative Humidity: 48%
Wind: NW @ 10 kts
Sea-level pressure: 1013.0 mb; 29.91 in. Hg: falling, then rising
Visibility: 70 miles
6-hr Max temp: 60F
6-hr Min temp: 44F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 70 130/60/40/3210/991/ FEW CU ALQDS 8/200 55003
10060 20044
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SUMMARY FOR THURSDAY, OCTOBER 12, 2023
TEMPERATURE (DEGREES F)
MAX…….69 NORMAL…..62
MIN…….51 NORMAL…..45
MEAN……60 NORMAL…..54
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+6
TOTAL DEPARTURE FOR THE MONTH…………………+69 [+5.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….5 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH……………54 DEPARTURE…….-59
TOTAL HEATING UNITS FOR THE SEASON………….153 DEPARTURE…….-78
TOTAL HEATING UNITS LAST SEASON TO DATE……..216 DEPARTURE…….-63
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…….+28
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)……….E18 NW @ 08:38 P.M.
VECTOR #1 (1-Sec)……….18 NNW @ 08:37 P.M.
VECTOR #2 (1-Sec)……….18 NNW @ 08:38 P.M.
DAVIS #1……………….17 NNW @ 08:36 P.M.
DAVIS #2 ………………16 SSW @ 08:39 P.M.
RMY #1 (Instantaneous)…..18 NNW @ 08:37 P.M.
RMY #2 (Instantaneous)…..17 NNW @ 08:38 P.M.
MERLIN…………………19 NW
RICHARDS (C5C) (Inst)……16 @ 08:41 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………11 NW @ 08:43 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..11 @ 08:43 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 08:38 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 NW @ 08:43 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 NNW @ 08:39 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..11 NW @ 08:43 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 NNW @ 08:38 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12 @ 08:43 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..4.7 NW [113 total miles]
VECTOR #1………………5.9
VECTOR #2………………6.1
DAVIS #1……………….5.6 WNW
DAVIS #2……………….5.5 NW
RMY #1…………………5.9 WNW
RMY #2…………………6.0 WNW
RICHARDS (C5C)………….6.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-1.87
TOTAL PRECIPITATION FOR THE YEAR…………..47.38 DEPARTURE…..+6.68
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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/+11/0.00/638/92 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 69/51/60/+6/0.00/…/.. 18 NW VEC1 18 NNW RMY 18
10/13 The low since midnight is 43F, the daily normal low is 45F
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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 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
RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976
TODAY’S REPORT PREPARED BY: Amanda Joly
