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Saturday, October 19, 2024

October 19, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, OCTOBER 19, 2024 ALL TIMES ARE…

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

SATURDAY, OCTOBER 19, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0602E
SUNSET:  1655E

ABUNDANT SUNSHINE AND WARMING TEMPERATURES….

Sunshine has been the rule today, and aside from some thin cirrus clouds,
skies have remained clear. It is a beautiful day to enjoy the outdoors,
especially since the foliage is beginning to near its peak!

A strong temperature inversion was in place through mid-morning. When I left
my house (about 20 miles south), the temperature was in the low 30s. I was
pleasantly surprised upon arriving at the summit that we were already at 50F!
Quite balmy in comparison. Since then, we have steadily climbed and are now
in the low 70s, about 10 degrees warmer than the average high for mid-October.
The dew point began in the upper 30s, and climbed a bit to the low 40s
by late morning.

The winds have been light, only picking up very slightly once the inversion
mixed out. The average speed today is a paltry 5mph, with flow now out of the
west-southwest. Our peak gust so far occurred around 11am, with a value of
only 14mph.

Visibility has been great with high pressure in control, and our views
have ranged from 70-80 miles. At the 10am observation, a thin layer of
smoke/pollutants was visible under the inversion to our north through
northeast, in the direction of Boston.

The maximum temperature so far today is 70F, which is 10 degrees above
the normal high of 60F. The minimum temperature since midnight is 46F,
which is 3 degrees above the normal low of 43F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant NE-E-S
Temperature: 52F; Dew Point: 39F; Relative Humidity: 61%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1033.7 mb; 30.53 in. Hg: rising steadily
Visibility: 70 miles, patchy ground fog E-S
6-hr Max temp: 52F
6-hr Min temp: 47F
24-hr Precip:  0.00 inches
BHO SA 1155 CLR 70 337/52/39/2204/053/ FEW CI DSNT NE-E-S PTCHY GF E-S
WND LGT/ 8/001 52005 10052 20047

10 A.M.
Weather: Thin scattered cirrus, thin smoke layer along horizon N-NE
Temperature: 61F; Dew Point: 44F; Relative Humidity: 54%
Wind: SW @ 5 kts, wind light
Sea-level pressure: 1033.6 mb; 30.52 in. Hg: rising, then falling
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 300 -SCT 80 336/61/44/2205/052/ THN K LYR ALG HRZN N-NE WND LGT/
8/001 58001

1 P.M.
Weather: Clear, few cirrus distant SE-SSW
Temperature: 70F; Dew Point: 43F; Relative Humidity: 38%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1031.1 mb; 30.45 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 70F
6-hr Min temp: 52F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 70 311/70/43/2306/045/ FEW CI DSNT SE-SSW WND LGT/ 8/001
58025 10070 20052

————————————————————–

SUMMARY FOR FRIDAY, OCTOBER 18, 2024

TEMPERATURE (DEGREES F)
MAX…….59  NORMAL…..60
MIN…….40  NORMAL…..43
MEAN……50  NORMAL…..52

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………-2
TOTAL DEPARTURE FOR THE MONTH……………………..-14 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………15  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..196  DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE SEASON………….266  DEPARTURE…….-40
TOTAL HEATING UNITS LAST SEASON TO DATE……..227  DEPARTURE…….+39

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….0  DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE SEASON………….757  DEPARTURE…….+80
TOTAL COOLING UNITS LAST SEASON TO DATE……..704  DEPARTURE…….+53

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated

F420C (Official)……….E28 NNE  @   09:14 A.M.
VECTOR #1 (1-Sec)……….28 NE   @   09:27 A.M.
VECTOR #2 (1-Sec)……….27 N    @   01:03 A.M.
DAVIS #1……………….26 NE   @   09:14 A.M.
DAVIS #2 ………………25 N    @   09:52 A.M.
RMY #1 (Instantaneous)…..27 NNE  @   09:14 A.M.
RMY #2 (Instantaneous)…..29 NNE  @   09:14 A.M.
MERLIN…………………24 N
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 N    @   01:14 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18      @   01:04 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18      @   01:01 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 NE   @   11:26 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 ENE  @   11:26 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 N    @   01:04 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 N    @   01:01 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.3 NE  [247 total miles] VECTOR #1……………..10.2
VECTOR #2……………..10.9
DAVIS #1………………10.6 NE
DAVIS #2………………10.6 NE
RMY #1………………..10.2 NE
RMY #2………………..10.7 NNE
RICHARDS (C5C)………….OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE MONTH…………..0.53 DEPARTURE…..-2.58
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.57 DEPARTURE…..+1.79

————————————————————–

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   66/55/61/+3/T/134/19               28 ENE VEC1 28 ENE RMY 29
10/2   66/52/59/+1/T/252/36               21 ENE VEC1 20 ENE RMY 20
10/3   72/52/62/+5/0.00/592/85            23 S   VEC1 23 S   RMY 23
10/4   74/54/64/+7/0.00/452/65            23 SW  VEC1 22 SW  RMY 22
10/5   72/52/62/+5/T/457/66               24 NNW VEC1 23 NNW RMY 24
10/6   65/47/56/0/0.00/655/95             20 SE  VEC1 19 SE  RMY 18
10/7   60/51/56/0/0.27/021/03             29 SSE VEC1 29 SSE RMY 31
10/8   64/45/55/0/0.00/663/97             21 NW  VEC1 21 NW  RMY 21
10/9   64/46/55/0/T/639/94                24 W   VEC1 23 WNW RMY 23
10/10  60/42/51/-4/0.00/616/91            36 NW  VEC1 36 NW  RMY 38
10/11  67/40/54/0/0.00/635/94             28 WSW VEC1 27 WSW RMY 27
10/12  71/48/60/+6/0.00/652/97            44 NW  VEC1 43 NW  RMY 45
10/13  50/44/47/-7/0.20/007/01            32 ENE VEC1 32 ENE RMY 30
10/14  51/38/45/-8/0.06/000/00            35 NW  VEC1 34 WNW RMY 36
10/15  55/35/45/-8/0.00/617/93            31 W   VEC1 30 WNW RMY 31
10/16  56/38/47/-5/0.00/615/93            32 NW  VEC1 31 NW  RMY 32
10/17  54/35/45/-7/0.00/…/..            22 NE  VEC1 22 NE  RMY 20
10/18  59/40/50/-2/0.00/…/..            28 NNE VEC1 28 NE  RMY 27

10/19  The low since midnight is 46F, the daily normal low is 43F.

————————————————————–

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 19
HIGH 81F IN 1945
LOW 21F IN 1922
PRECIP 3.64 INCHES IN 1932
SNOWFALL 1.0 INCHES IN 1972
PEAK GUST 66 MPH SSW IN 1967

RECORDS FOR OCTOBER 20
HIGH 78F IN 1965,1984
LOW 24F IN 1972
PRECIP 7.10 INCHES IN 1996 (RECORD FOR MONTH)
SNOWFALL TRACE IN 1934,1943
PEAK GUST 63 MPH W IN 1966

TODAY’S REPORT PREPARED BY: Joshua Polen

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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
Part I — Data Use Policy
§ 01

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