Wednesday, November 8, 2023

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

WEDNESDAY, NOVEMBER 8, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0626E
SUNSET:  1629E

CHILLY CONDITIONS RETURN DESPITE SUNNY SKIåES…

Due to the passage of a cold front last evening, the warm
conditions we experienced yesterday were short lived, and
we have returned to below-normal territory for today. The high
so far of 48F occurred at midnight, and with continued cold air
advection from the northwest it appears unlikely we will
surpass it. Otherwise, skies cleared up this morning, with
cirrus advancing from the west by early afternoon ahead of
our next storm system.

Temperatures dropped from the upper 40s around midnight to the
mid 30s by sunrise, and have slowly rebounded into the low 40s by
early afternoon. This air mass is also very dry, as indicated by the
dew point hovering around 20F throughout the day.

Winds have continued to be relatively strong, with our peak so far
of 39 mph around 4:15am. The average speed is at 15mph, and the
prevailing direction has been from the northwest.

Visibility has improved markedly compared to yesterday, with views
this morning of 60 miles improving to 80 miles by this afternoon,
largely thanks to this dry air mass currently in place.

The maximum temperature so far today is 48F, which is 5 degrees
below the normal high of 53F. The minimum temperature since
midnight is 34F, which is 2 degrees below the normal low of 36F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus
Temperature: 35F; Dew Point: 21F; Relative Humidity: 57%
Wind: NW @ 15G25 kts, peak wind NW 35mph at 6:24 A.M.
Sea-level pressure: 1014.8 mb; 29.97 in. Hg: rising unsteadily
Visibility: 60 miles
6-hr Max temp: 47F
6-hr Min temp: 35F
24-hr Precip:  0.01 inches
24-hr Snowfall: 0.0 inches
BHO SA 1155 E35 BKN 60 148/35/21/3215G25/997/ PK WND 3230/24/ 8/500 52039 70001 10047 20035

10 A.M.
Weather: Clear, few stratocumulus all quadrants, few cirrus distant SW-WNW
Temperature: 38F; Dew Point: 21F; Relative Humidity: 49%
Wind: NW @ 14G25 kts, peak wind NW 32mph at 9:21 A.M.
Sea-level pressure: 1016.6 mb; 30.02 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 166/38/21/3114G25/002/ FEW SC ALQDS FEW CI DSNT SW-WNW PK WND 3228/21/ 8/501 51018

1 P.M.
Weather: Thin scattered cirrus, few stratocumulus offshore distant NE-ESE,
few cirrostratus distant SSW-NW
Temperature: 42F; Dew Point: 20F; Relative Humidity: 40%
Wind: NW @ 17G27 kts, peak wind NW 31mph at 12:52 P.M.
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling unsteadily
Visibility: 80 miles
6-hr Max temp: 43F
6-hr Min temp: 34F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
BHO SA 1755 250 -SCT 80 161/42/20/3117G27/001/ FEW SC OFFSHR DSNT NE-ESE FEW CS DSNT SSW-NW PK WND 3127/52/ 8/505 57005 10043 20034

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SUMMARY FOR TUESDAY, NOVEMBER 7, 2023

TEMPERATURE (DEGREES F)
MAX…….65   NORMAL…..53
MIN…….46   NORMAL…..36
MEAN……56   NORMAL…..45

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+11
TOTAL DEPARTURE FOR THE MONTH………………….+3 [+0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….9  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH…………..130  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE SEASON………….480  DEPARTURE……-166
TOTAL HEATING UNITS LAST SEASON TO DATE……..442  DEPARTURE…….+38

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)……….E38 WNW  @  06:38 P.M.
VECTOR #1 (1-Sec)……….37 WNW  @  06:38 P.M.
VECTOR #2 (1-Sec)……….37 WNW  @  06:38 P.M.
DAVIS #1……………….37 W    @  06:38 P.M.
DAVIS #2 ………………45 S    @  04:29 A.M.
RMY #1 (Instantaneous)…..37 WNW  @  07:54 P.M.
RMY #2 (Instantaneous)…..38 NW   @  07:36 P.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……39      @  06:38 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 S    @  04:49 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25      @  04:45 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26      @  03:38 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 S    @  06:13 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 S    @  03:38 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 S    @  04:55 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 SSW  @  06:18 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………24      @  04:55 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..15.9 WNW [381 total miles] VECTOR #1………………15.8
VECTOR #2………………16.8
DAVIS #1……………….15.7 SW
DAVIS #2……………….17.3 SW
RMY #1…………………15.3 SW
RMY #2…………………16.7 WSW
RICHARDS (C5C)………….15.5

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.06 DEPARTURE…..-0.97
TOTAL PRECIPITATION FOR THE YEAR…………..49.25 DEPARTURE…..+4.06

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-0.3
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-1.0

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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

11/1  42/31/37/-10/0.01/T/…/..          23 ENE VEC1 21 ENE RMY 23
11/2  45/28/37/-10/0.00/0.0/…/..        23 NNW VEC1 23 NNW RMY 22
11/3  55/36/46/0/0.00/0.0/…/..          32 SW  VEC1 33 SSW RMY 33
11/4  59/44/52/+6/0.00/0.0/…/..         32 SW  VEC1 31 SW  RMY 32
11/5  61/42/52/+6/0.00/0.0/…/..         24 NNW VEC1 27 NNW RMY 27
11/6  50/40/45/+/0.00/0.0/…/..          28 S   VEC1 27 S   RMY 25
11/7  65/46/56/+11/0.05/0.0/…/..        38 WNW VEC1 37 WNW RMY 37

11/8 The low since midnight is 48F, the daily normal low is 36F

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NOVEMBER DAILY RECORDS TO DATE

11/1 TIED RECORD FOR SNOWFALL WITH A TRACE, TIED WITH 1906, 1951

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

RECORDS FOR NOVEMBER 8
HIGH 73 IN 2020
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947

RECORDS FOR NOVEMBER 9
HIGH 74 IN 2020
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.5 IN 1892
PEAK GUST 73e S IN 1943

TODAY’S REPORT PREPARED BY: Joshua Polen/Matt Douglas