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Tuesday, October 24, 2023

October 24, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, OCTOBER 24, 2023 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

TUESDAY, OCTOBER 24, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0607E
SUNSET:  1649E

A MIX OF SUN AND CLOUDS ONCE AGAIN TODAY WITH SEASONABLY MILD
TEMPERATURES…

After a chilly start this morning, we have warmed nicely into
the upper 50s to low 60s early this afternoon. Varying amounts
of, mainly mid and high clouds have been streaming across the
area. All in all, it’s been quite a nice fall day here on the
summit of Blue Hill.

Temperatures as mentioned have reached the lower 60s, which is
slightly above the expected readings for this time of year. The
dew point remains in the “Goldie Locks” range with readings in
the 40s. It’s not too humid nor too dry.

The wind has been on the light side today with an average speed
of only around 7mph. The peak gust so far today is around 16mph,
which occurred just before the 1pm observation.

Visibility has been excellent again today with a view of 70-80
miles all day!

The maximum temperature so far today has been 61F, which is 3
degrees above the normal high of 58F. The minimum temperature
since midnight is 41F, which is equal to 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. It did not occur this morning, as such
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)

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, scattered cirrus, few stratocumulus
N-E-S
Temperature: 47F; Dew Point: 40F; Relative Humidity: 75%
Wind: NE @ 3 kts, wind light
Sea-level pressure: 1029.3 mb; 30.40 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 47F
6-hr Min temp: 41F
24-hr Precip: 0.00 inches
BHO SA 1155 100 SCT 250 SCT 70 293/47/40/0503/040/ FEW SC N-E-S
WND LGT/ 8/551 53015 10047 20041

10 A.M.
Weather: Scattered altocumulus, scattered cirrus, few stratocumulus
distant N-E-S
Temperature: 55F; Dew Point: 42F; Relative Humidity: 60%
Wind: SW @ 3 kts, wind light and variable
Sea-level pressure: 1029.5 mb; 30.40 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 130 SCT 250 SCT 70 295/55/42/2203/040/ FEW SC DSNT N-E-S
WND L/V/ 8/551 50002

1 P.M.
Weather: Broken altocumulus, few cumulus distant E-S
Temperature: 60F; Dew Point: 44F; Relative Humidity: 53%
Wind: SSW @ 8G14 kts
Sea-level pressure: 1028.1 mb; 30.36 in. Hg: falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 61F
6-hr Min temp: 47F
6-hr Precip: 0.00 inches
BHO SA 1755 E100 BKN 80 281/60/44/2108G14/036/ FEW CU DSNT E-S/
8/280 58014 10061 20047

————————————————————–

SUMMARY FOR MONDAY, OCTOBER 23, 2023

TEMPERATURE (DEGREES F)
MAX…….62   NORMAL…..58
MIN…….42   NORMAL…..41
MEAN……52   NORMAL…..50

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+2
TOTAL DEPARTURE FOR THE MONTH…………………+89 [+3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………13  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..180  DEPARTURE…….-81
TOTAL HEATING UNITS FOR THE SEASON………….279  DEPARTURE…….-99
TOTAL HEATING UNITS LAST SEASON TO DATE……..323  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)……….E24 NW   @  01:03 A.M.
VECTOR #1 (1-Sec)……….22 NNW  @  03:53 A.M.
VECTOR #2 (1-Sec)……….26 NNW  @  12:52 A.M.
DAVIS #1……………….21 NW   @  12:14 A.M.
DAVIS #2 ………………22 NW   @  12:44 A.M.
RMY #1 (Instantaneous)…..23 N    @  10:34 P.M.
RMY #2 (Instantaneous)…..25 NNW  @  12:52 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……23      @  01:09 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 NNW  @  12:54 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @  10:40 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16      @  12:53 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 NW   @  12:53 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 NNE  @  10:41 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 N    @  10:40 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 NNE  @  10:41 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15      @  10:40 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.9 NNW [214 total miles] VECTOR #1………………9.2
VECTOR #2………………9.5
DAVIS #1……………….9.2 NNW
DAVIS #2……………….9.2 N
RMY #1…………………8.9 NNW
RMY #2…………………9.3 NNW
RICHARDS (C5C)………….9.6

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…..-3.03
TOTAL PRECIPITATION FOR THE YEAR…………..48.23 DEPARTURE…..+5.52

————————————————————–

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 The low since midnight is 41F, the daily normal low is 41F

————————————————————–

OCTOBER DAILY RECORDS TO DATE

.NONE…

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR OCTOBER 24
HIGH 79F IN 1963
LOW 22F IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959

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

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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