Monday, October 30, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, OCTOBER 30, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0615E
SUNSET: 1640E
RAINY, FOGGY, AND COOL CONDITIONS TODAY HERE AT BLUE HILL…
Cloudy skies with periods of rain have been the theme today
with a cool and raw feel out there. Temperatures started in
the mid to upper 40s early this morning, and has only risen
to the low 50s early this afternoon.
Rainfall through 7am this morning totaled 0.51″, with an
additional 0.16″ being measured through 1pm, giving us a
storm total thus far of 0.67″. Despite the recent rainfall,
the month is still running more than a 3.50″ deficit in the
precipitation department.
The wind has been on the light side again today, first out of
the east-southeast, then backing to the north and north-
northwest late this morning. The average speed so far today
has only been around 8mph. The peak gust is only around 21mph
so far, which occurred just before 5:30am this morning.
Visibility has of course been drastically limited by the rain
and fog, with the view peaking at around half a mile for a
short time late this morning.
The maximum temperature so far today is 52F, which is 4 degrees
below the normal high of 56F. The minimum temperature since
midnight is 44F, which is 5 degrees above the normal low of 39F.
As we have passed the number 1 spot for the latest minimum
temperature below 40F a week ago, this makes 2023 first in
the rankings for the latest temperature below 40. We should
finally dip below 40F tomorrow morning, but 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: Sky obscured, vertical visibility 300ft, light rain
Temperature: 48F; Dew Point: 48F; Relative Humidity: 100%
Wind: ESE @ 8 kts
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: falling, then more slowly
Visibility: 1/4 mile, fog
6-hr Max temp: 48F
6-hr Min temp: 44F
24-hr Precip: 0.51 inches
BHO SA 1155 X W3 1/4R-F 109/48/48/1208/985/ 8//// 56032 6008/ 70051
10048 20044
10 A.M.
Weather: Sky obscured, vertical visibility 300ft, light rain
Temperature: 51F; Dew Point: 51F; Relative Humidity: 100%
Wind: Calm
Sea-level pressure: 1007.6 mb; 29.75 in. Hg: falling, then more rapidly
Visibility: 1/4 mile, fog
3-hr Precip: 0.12 inches
BHO SA 1455 X W3 1/4R-F 076/51/51/0000/975/ PCPN VRY LGT WND CALM/
8//// 58033 6012/
1 P.M.
Weather: Sky obscured, vertical visibility 300ft, light drizzle
Temperature: 51F; Dew Point: 51F; Relative Humidity: 100%
Wind: NNW @ 5 kts, wind light
Sea-level pressure: 1005.7 mb; 29.70 in. Hg: falling, then more rapidly
Visibility: 1/8 mile, fog
6-hr Max temp: 52F
6-hr Min temp: 48F
6-hr Precip: 0.16 inches
BHO SA 1755 X W2 1/8L-F 057/51/51/3405/970/ WND LGT/ 8//// 58019 6016/
10052 20048
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SUMMARY FOR SUNDAY, OCTOBER 29, 2023
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..56
MIN…….44 NORMAL…..39
MEAN……51 NORMAL…..48
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+3
TOTAL DEPARTURE FOR THE MONTH………………..+167 [+5.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………..210 DEPARTURE……-149
TOTAL HEATING UNITS FOR THE SEASON………….309 DEPARTURE……-167
TOTAL HEATING UNITS LAST SEASON TO DATE……..395 DEPARTURE…….-86
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………26 DEPARTURE…….+19
TOTAL COOLING UNITS FOR THE SEASON………….715 DEPARTURE…….+38
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-169
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)……….E25 E @ 11:39 P.M.
VECTOR #1 (1-Sec)……….24 E @ 11:39 P.M.
VECTOR #2 (1-Sec)……….24 E @ 11:39 P.M.
DAVIS #1……………….M
DAVIS #2 ………………25 E @ 11:39 P.M.
RMY #1 (Instantaneous)…..25 E @ 11:39 P.M.
RMY #2 (Instantaneous)…..24 E @ 11:39 P.M.
MERLIN…………………21 E
RICHARDS (C5C) (Inst)……23 @ 11:39 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 E @ 11:37 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 11:39 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 03:25 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 E @ 03:25 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 E @ 11:39 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 E @ 03:25 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 11:39 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.2 E [197 total miles]
VECTOR #1………………8.1
VECTOR #2………………8.7
DAVIS #1……………….M
DAVIS #2……………….8.6 ENE
RMY #1…………………8.4 NE
RMY #2…………………8.6 NE
RICHARDS (C5C)………….8.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.51 DEPARTURE…..+0.33
TOTAL PRECIPITATION FOR THE MONTH…………..1.52 DEPARTURE…..-3.62
TOTAL PRECIPITATION FOR THE YEAR…………..48.74 DEPARTURE…..+4.93
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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/+8/0.00/557/85 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 79/59/69/+20/0.00/…/.. 20 WSW VEC1 19 WSW RMY 20
10/27 77/59/68/+19/0.00/…/.. 23 WSW VEC1 22 WSW RMY 23
10/28 80/57/69/+21/0.00/…/.. 31 W VEC1 31 W RMY 31
10/29 57/44/51/+3/0.41/…/.. 25 E VEC1 24 E RMY 25
10/30 The low since midnight is 44F, the daily normal low is 39F
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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 30
HIGH 75F IN 1946,1989
LOW 21F IN 1928
PRECIP 1.85 INCHES IN 1917
SNOWFALL 6.5 INCHES IN 2020
PEAK GUST 73 SE IN 2017
RECORDS FOR OCTOBER 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945
TODAY’S REPORT PREPARED BY: Matt Douglas
