Friday, October 6, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, OCTOBER 6, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0547E
SUNSET: 1717E
VISIBILITY, WARM TEMPS REBOUND WITH SUN AND CLEARING SKIES
THIS AFTERNOON…
Today started off overcast and on the cooler side, compared
to the previous few days. Once the sun was able to come through
we were able to make it to about 70F by the last observation.
Temperatures are still above average, though not as much. Dew
points are still in the lower 60’s as well, making for a muggy
kind of feel, especially once the sun came through in the early
afternoon hours. Paired with little to no wind, it has not felt
like a typical October day when we are generally much cooler.
The wind has remained light throughout the day, with only an
average speed so far around 7mph, mostly from the ESE and SSE. We
have had a few occurrences of calm conditions as well today. Our
peak gust so far occurred after midnight at about 16mph.
Visibility greatly improved after our first observation. This
morning we had about 15 miles of visibility and improved to about
50 miles for the remainder of the day.
The maximum temperature so far today has been 70F, which is 5
degrees above the normal high of 65F. The minimum temperature
since midnight is 60F, which is 12 degrees above the normal low
of 48F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus, few lower stratus fractus S-SW-W
Temperature: 62F; Dew Point: 61F; Relative Humidity: 99%
Wind: S @ 4 kts, wind light
Sea-level pressure: 1021.2 mb; 30.16 in. Hg: falling, then rising
Visibility: 15 miles, thin fog layer all quadrants, thin smoke
layer N
6-hr Max temp: 62F
6-hr Min temp: 60F
24-hr Precip: 0.00 inches
BHO SA 1155 E6 OVC 15 212/62/61/1804/016/ FEW LWR STFRA S-SW-W
THN F LYR ALQDS THN K LYR N WND LGT/ 8/6// 55001 10062 20060
10 A.M.
Weather: Broken stratocumulus, broken altocumulus overcast
cirrostratus
Temperature: 66F; Dew Point: 62F; Relative Humidity: 87%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1022.0 mb; 30.14 in. Hg: falling, then more
rapidly
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E30 BKN 95 BKN 220 OVC 50 208/66/62/1005/014/ FEW BINOVC
ALQDS WND LGT/ 8/556 58004
1 P.M.
Weather: Broken cumulus, altocumulus, thin broken cirrus
Temperature: 69F; Dew Point: 64F; Relative Humidity: 94%
Wind: NE @ 6 kts, wind light
Sea-level pressure: 1019.0 mb; 30.09 in. Hg: falling, then more
slowly
Visibility: 50 miles
6-hr Max temp: 70F
6-hr Min temp: 62F
6-hr Precip: 0.00 inches
BHO SA 1755 E35 BKN 95 BKN 250 -BKN 50 190/69/64/0406/009/ WND LGT/
8/251 56018 10070 20062
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SUMMARY FOR THURSDAY, OCTOBER 5, 2023
TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..66
MIN…….59 NORMAL…..48
MEAN……68 NORMAL…..57
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+11
TOTAL DEPARTURE FOR THE MONTH…………………+43 [+8.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH…………….9 DEPARTURE…….-32
TOTAL HEATING UNITS FOR THE SEASON………….108 DEPARTURE…….-51
TOTAL HEATING UNITS LAST SEASON TO DATE……..162 DEPARTURE…….-54
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………14 DEPARTURE…….+11
TOTAL COOLING UNITS FOR THE SEASON………….703 DEPARTURE…….+30
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-181
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)……….E24 S @ 07:37 P.M.
VECTOR #1 (1-Sec)……….24 S @ 07:37 P.M.
VECTOR #2 (1-Sec)……….24 S @ 07:32 P.M.
DAVIS #1……………….24 S @ 07:37 P.M.
DAVIS #2 ………………27 S @ 07:32 P.M.
RMY #1 (Instantaneous)…..23 S @ 07:37 P.M.
RMY #2 (Instantaneous)…..25 S @ 07:32 P.M.
MERLIN…………………21 S
RICHARDS (C5C) (Inst)……22 @ 07:11 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 S @ 07:38 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 07:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 07:37 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 SSE @ 07:07 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S @ 09:04 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 S @ 07:38 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 S @ 07:37 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 07:37 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.5 SSW [204 total miles]
VECTOR #1………………9.1
VECTOR #2………………9.7
DAVIS #1……………….8.5 S
DAVIS #2……………….9.7 SSW
RMY #1…………………9.0 SSW
RMY #2…………………9.9 SSW
RICHARDS (C5C)………….9.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.82
TOTAL PRECIPITATION FOR THE YEAR…………..47.22 DEPARTURE…..+7.73
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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 The low since midnight is 60F, the daily normal low is 48F
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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 6
HIGH 83F IN 1990, 2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942
RECORDS FOR OCTOBER 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 76 W IN 2020
TODAY’S REPORT PREPARED BY: Amanda Joly
