Wednesday, October 25, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, OCTOBER 25, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0609E
SUNSET: 1647E
BEAUTIFUL SUNNY AND WARM FALL DAY…
Today has been unseasonably warm all around, and with a nice breeze
and mostly clear skies, it has been a wonderful day to get outside
and enjoy the foliage.
Temperatures today have been well above normal, beginning in the
low 50s this morning and rising into the low 70s by the early
afternoon. Keep in mind that by this time of year, our typical
high temperature is only in the 50s on the hill! The dew point
has remained nearly steady throughout the day, right around 50F.
A nice breeze has been with us through most of the day, and our
average speed thus far is a pleasant 13mph. The peak gust of 27mph
took place early this morning, just before 3am.
Visibility has been good, ranging between 40 and 50 miles. A higher
dew point compared to yesterday is contributing to some haze.
The maximum temperature so far today has been 73F, which is 15
degrees above the normal high of 58F. The minimum temperature
since midnight is 50F, which is 9 degrees above the normal low
of 41F.
As we continue to remain above normal in the minimum temperature
category, we are actively watching for when we will have our first
low temperature below 40F. 2023 is going to end up ranking first
for the latest temperature below 40. The next possible chance for
us to achieve this won’t be until perhaps the middle to end of next
week, at which point we’ll be pushing into early November. Stay tuned!
Here are the current rankings as compiled by our Chief Scientist,
Mike Iacono.
BHO Latest First Minimum Temperature Below 40 deg F (1885-2023):
1) 24 October 2013 (36F)
24 October 2021 (37F)
3) 22 October 1955 (34F)
4) 21 October 2005 (39F)
5) 20 October 1960 (38F)
6) 19 October 2014 (39F)
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant WSW-N
Temperature: 52F; Dew Point: 50F; Relative Humidity: 97%
Wind: SW @ 11G17 kts
Sea-level pressure: 1025.1 mb; 30.27 in. Hg: falling, then rising
Visibility: 40 miles, thin fog
6-hr Max temp: 52F
6-hr Min temp: 50F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 40 251/52/50/2211G17/027/ FEW CI DSNT WSW-N THN F ALQDS/ 8/001 53001 10052 20050
10 A.M.
Weather: Thin scattered cirrus, few altocumulus/altocumulus castellanus
distant W-NNE
Temperature: 62F; Dew Point: 49F; Relative Humidity: 63%
Wind: SW @ 9G17 kts
Sea-level pressure: 1025.0 mb; 30.27 in. Hg: falling, then more slowly
Visibility: 50 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 250 -SCT 50 250/62/49/2209G17/027/ FEW AC/ACC DSNT W-NNE HAZY/ 8/081 56001
1 P.M.
Weather: Thin scattered cirrus, few altocumulus distant SW-N-SE
Temperature: 73F; Dew Point: 51F; Relative Humidity: 46%
Wind: SSW @ 10G16 kts
Sea-level pressure: 1022.6 mb; 30.20 in. Hg: falling unsteadily
Visibility: 50 miles, hazy
6-hr Max temp: 73F
6-hr Min temp: 52F
6-hr Precip: 0.00 inches
BHO SA 1755 250 -SCT 50 226/73/51/2110G16/020/ FEW AC DSNT SW-N-SE HAZY/ 8/051 57024 10073 20052
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SUMMARY FOR TUESDAY, OCTOBER 24, 2023
TEMPERATURE (DEGREES F)
MAX…….61 NORMAL…..58
MIN…….41 NORMAL…..41
MEAN……51 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH…………………+90 [+3.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..194 DEPARTURE…….-82
TOTAL HEATING UNITS FOR THE SEASON………….293 DEPARTURE……-101
TOTAL HEATING UNITS LAST SEASON TO DATE……..334 DEPARTURE…….-41
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……..+8
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE…….+27
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)……….E28 SW @ 08:55 P.M.
VECTOR #1 (1-Sec)……….26 SW @ 08:55 P.M.
VECTOR #2 (1-Sec)……….26 SW @ 07:50 P.M.
DAVIS #1……………….25 SW @ 08:55 P.M.
DAVIS #2 ………………25 SW @ 07:51 P.M.
RMY #1 (Instantaneous)…..29 SW @ 08:43 P.M.
RMY #2 (Instantaneous)…..27 SW @ 07:50 P.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……27 @ 08:55 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SW @ 08:58 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 08:41 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 08:35 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 SSW @ 09:09 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SSW @ 08:36 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SW @ 08:42 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SW @ 08:35 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 @ 08:42 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.8 SW [212 total miles]
VECTOR #1………………9.5
VECTOR #2……………..10.0
DAVIS #1……………….8.3 SW
DAVIS #2……………….9.5 SW
RMY #1…………………9.4 SW
RMY #2…………………9.9 SW
RICHARDS (C5C)………….9.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..1.01 DEPARTURE…..-3.21
TOTAL PRECIPITATION FOR THE YEAR…………..48.23 DEPARTURE…..+5.34
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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/+6/0.00/479/71 18 NW VEC1 18 NNW RMY 18
10/13 61/43/52/-2/0.00/638/95 33 NW VEC1 31 NW RMY 34
10/14 60/44/52/-1/0.00/247/37 24 NW VEC1 23 NW RMY 23
10/15 59/44/52/-1/0.00/226/34 24 NNW VEC1 25 NNW RMY 25
10/16 58/44/51/-1/0.07/166/25 17 WNW VEC1 17 WNW RMY 17
10/17 60/45/53/+1/T/211/32 15 N VEC1 15 N RMY 14
10/18 62/49/56/+4/0.00/079/12 15 SSW VEC1 15 SSW RMY 16
10/19 65/50/58/+8/0.00/…/.. 31 SSW VEC1 30 SSW RMY 33
10/20 63/55/57/+6/0.01/…/.. 28 SSE VEC1 26 SE RMY 26
10/21 58/52/55/+4/0.76/…/.. 40 NW VEC1 41 NW RMY 44
10/22 56/45/51/+1/0.00/…/.. 36 WNW VEC1 35 WNW RMY 36
10/23 62/42/52/+2/0.01/…/.. 24 NW VEC1 22 NNW RMY 23
10/24 61/41/51/+1/0.00/…/.. 28 SW VEC1 26 SW RMY 29
10/25 The low since midnight is 50F, the daily normal low is 41F
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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 25
HIGH 81F IN 1963
LOW 26F IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980
RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1921,1933
PRECIP 2.23 INCHES IN 2021
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967
TODAY’S REPORT PREPARED BY: Joshua Polen/Matt Douglas
