Thursday, October 26, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, OCTOBER 26, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0610E
SUNSET: 1646E
NEAR RECORD WARM TEMPERATURES UNDER MAINLY SUNNY SKIES TODAY…
The stretch of unseasonably warm weather continues today. As a
matter of fact, both the low and high temperatures today are
running around 20F (+/-) above normal for today’s date! It has
the feel of early to mid September instead of late October!
The high so far today of 79F is only 1 degree shy of tying the
record for the date. The record high for today is 80F set in 1963.
As mentioned, the temperature has reached the upper 70s here on
the summit with a dew point in the upper 40s to low 50s. Even
though it’s quite warm, it is at least quite comfortable out there
despite the lack of a breeze this afternoon.
We had a bit of a breeze early this morning, but the trend has
been for decreasing wind as the day has progressed. Wind speeds
have been on the light side since late this morning. The average
speed for the day so far is around 8mph. The peak gust so far is
around 20mph occurring just before 3:30am this morning.
Visibility has been somewhat limited due to haziness, with the
view of around 40 miles being the theme today.
The maximum temperature so far today is 79F, which is 22 degrees
above the normal high of 57F. The minimum temperature since
midnight is 59F, which is 19 degrees above the normal low of 40F.
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 of next week,
at which point we’ll be entering into 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: Broken altocumulus/altostratus
Temperature: 60F; Dew Point: 49F; Relative Humidity: 65%
Wind: WSW @ 7 kts
Sea-level pressure: 1022.9 mb; 30.21 in. Hg: rising, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 59F
24-hr Precip: 0.00 inches
BHO SA 1155 E120 BKN 40 229/60/49/2507/021/ HAZY/ 8/070 53008
10060 20059
10 A.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 71F; Dew Point: 51F; Relative Humidity: 48%
Wind: WNW @ 2 kts, wind light and variable
Sea-level pressure: 1023.3 mb; 30.22 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 40 233/71/51/3002/022/ FEW AC ALQDS HAZY WND L/V/
8/070 50004
1 P.M.
Weather: Scattered cirrus, few altocumulus all quadrants
Temperature: 77F; Dew Point: 50F; Relative Humidity: 39%
Wind: WSW @ 2 kts, wind light
Sea-level pressure: 1021.5 mb; 30.16 in. Hg: falling unsteadily
Visibility: 40 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 250 SCT 40 215/77/50/2402/016/ FEW AC ALQDS HAZY
WND LGT/ 8/051 57018 10079 20060
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SUMMARY FOR WEDNESDAY, OCTOBER 25, 2023
TEMPERATURE (DEGREES F)
MAX…….75 NORMAL…..58
MIN…….50 NORMAL…..41
MEAN……63 NORMAL…..49
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+14
TOTAL DEPARTURE FOR THE MONTH………………..+104 [+4.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….2 DEPARTURE…….-14
TOTAL HEATING UNITS FOR THE MONTH…………..196 DEPARTURE…….-96
TOTAL HEATING UNITS FOR THE SEASON………….295 DEPARTURE……-115
TOTAL HEATING UNITS LAST SEASON TO DATE……..339 DEPARTURE…….-44
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)……….E26 SSW @ 01:51 A.M.
VECTOR #1 (1-Sec)……….26 SSW @ 01:51 A.M.
VECTOR #2 (1-Sec)……….25 SSW @ 01:51 A.M.
DAVIS #1……………….24 SSW @ 01:51 A.M.
DAVIS #2 ………………26 S @ 02:06 A.M.
RMY #1 (Instantaneous)…..27 SSW @ 01:51 A.M.
RMY #2 (Instantaneous)…..26 SSW @ 01:51 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……26 @ 01:51 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW @ 03:02 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 01:52 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 01:53 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 SSW @ 01:53 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SSW @ 01:53 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SSW @ 01:53 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SSW @ 01:53 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 02:29 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.1 SW [290 total miles]
VECTOR #1………………12.5
VECTOR #2………………12.7
DAVIS #1……………….11.8 SW
DAVIS #2……………….12.4 SW
RMY #1…………………12.4 SW
RMY #2…………………12.9 SW
RICHARDS (C5C)………….11.5
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE MONTH…………..1.01 DEPARTURE…..-3.40
TOTAL PRECIPITATION FOR THE YEAR…………..48.23 DEPARTURE…..+5.15
————————————————————–
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/+8/0.00/557/85 31 SSW VEC1 30 SSW RMY 33
10/20 63/55/57/+6/0.01/000/00 28 SSE VEC1 26 SE RMY 26
10/21 58/52/55/+4/0.76/000/00 40 NW VEC1 41 NW RMY 44
10/22 56/45/51/+1/0.00/382/59 36 WNW VEC1 35 WNW RMY 36
10/23 62/42/52/+2/0.01/386/60 24 NW VEC1 22 NNW RMY 23
10/24 61/41/51/+1/0.00/424/66 28 SW VEC1 26 SW RMY 29
10/25 75/50/63/+14/0.00/472/74 26 SSW VEC1 26 SSW RMY 27
10/26 The low since midnight is 59F, the daily normal low is 40F
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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 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
RECORDS FOR OCTOBER 27
HIGH 83F IN 1963
LOW 21F IN 1936
PRECIP 2.08 INCHES IN 2018
SNOW 2.5 INCHES IN 2011
WIND 66 MPH NNE IN 2021
TODAY’S REPORT PREPARED BY: Matt Douglas
