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Friday, November 17, 2023

November 17, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, NOVEMBER 17, 2023 ALL TIMES ARE…

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

FRIDAY, NOVEMBER 17, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0637E
SUNSET:  1621E

MOSTLY CLOUDY SKIES, BREEZY CONDITIONS, AND MILD TEMPERATURES
CONTINUE ON GREAT BLUE HILL TODAY…

We have had an overall beautiful day today on the hill with
mild temperatures and breezy conditions. Clouds have gradually
increased as the day progressed.

The temperatures are once again above average for the day, with
a high so far at 64F. Dew points have also been higher, hovering
in the upper 40’s to low 50’s. With cloudy conditions and gusty
winds, it felt overall comfortable.

Winds have been very active today, due to the increased pressure
gradient moving into our region. Our average for the day so far has
been about 14 mph. Our current peak gust has been about 33 mph,
which occurred just after our 1pm observation.

Visibility has steadily increased as the day went on. We had started
the day with a partial undercast and an average of 5 miles visibility
and then improved to 50 miles by the 1pm observation.

The maximum temperature so far today is 64F, which is 14 degrees
above the normal high of 50F. The minimum temperature since
midnight is 43F, which is 9 degrees above the normal low of 34F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, broken altocumulus, thin broken cirrus,
partial undercast SW-W-NE, sun dimly visibile
Temperature: 47F; Dew Point: 47F; Relative Humidity: 100%
Wind: SSW @ 11G21 kts
Sea-level pressure: 1019.9 mb; 30.12 in. Hg: falling steadily
Visibility: 5 miles, 10 SW-W-NE, 3 S-SSW, 1 E-ESE
6-hr Max temp: 49F
6-hr Min temp: 43F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 ///BKN E20 BKN 65 BKN 250 -BKN 5F 199/47/47/2011G21/012/
PARTIAL UNDERCAST SW-W-NE SUN DMLY VSBL VSBY 10 SW-W-NE 3 S-SSW
1 E-ESE/ 8/551 57005 10049 20043

10 A.M.
Weather: Broken cirrostratus, few altocumulus distant W-NW
Temperature: 57F; Dew Point: 52F; Relative Humidity: 83%
Wind: SSW @ 13G25 kts
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 BKN 30 187/57/52/2013G25/008/ FEW AC DSNT W-NW HAZY/
8/056 58012

1 P.M.
Weather: Broken cirrostratus, thin broken cirrus,
few stratocumulus all quadrants
Temperature: 63F; Dew Point: 48F; Relative Humidity: 57%
Wind: SSW @ 13G21 kts, peak wind SW 33mph at 12:01 P.M.
Sea-level pressure: 1015.3 mb; 29.98 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 64F
6-hr Min temp: 47F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E200 BKN 250 -BKN 50 153/63/48/2113G21/998/ FEW SC ALQDS
FEW AC DSNT WNW PK WND 2229/01/ 8/556 58034 10064 20047

————————————————————–

SUMMARY FOR THURSDAY, NOVEMBER 16, 2023

TEMPERATURE (DEGREES F)
MAX…….62   NORMAL…..50
MIN…….40   NORMAL…..34
MEAN……51   NORMAL…..42

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+9
TOTAL DEPARTURE FOR THE MONTH…………………-25 [-1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH…………..355  DEPARTURE…….+23
TOTAL HEATING UNITS FOR THE SEASON………….705  DEPARTURE……-138
TOTAL HEATING UNITS LAST SEASON TO DATE……..608  DEPARTURE…….+97

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)……….E30 WSW  @  12:16 A.M.
VECTOR #1 (1-Sec)……….31 WSW  @  12:16 A.M.
VECTOR #2 (1-Sec)……….32 WSW  @  12:15 A.M.
DAVIS #1……………….30 WSW  @  12:16 A.M.
DAVIS #2 ………………29 WSW  @  12:16 A.M.
RMY #1 (Instantaneous)…..31 WSW  @  12:15 A.M.
RMY #2 (Instantaneous)…..31 WSW  @  12:15 A.M.
MERLIN…………………29 WSW
RICHARDS (C5C) (Inst)……31      @  12:15 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WSW  @  12:15 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @  12:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22      @  12:16 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 SW   @  12:14 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WSW  @  12:01 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 WSW  @  12:16 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 WSW  @  12:16 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20      @  12:16 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.8 WSW [210 total miles] VECTOR #1………………9.2
VECTOR #2………………9.7
DAVIS #1……………….9.3 WSW
DAVIS #2……………….9.5 W
RMY #1…………………9.1 WSW
RMY #2…………………9.6 W
RICHARDS (C5C)………….9.5

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.17 DEPARTURE…..-2.13
TOTAL PRECIPITATION FOR THE YEAR…………..49.36 DEPARTURE…..+2.90

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……-0.6
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-1.3

————————————————————–

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/056/09          23 ENE VEC1 21 ENE RMY 23
11/2  45/28/37/-10/0.00/0.0/618/100       23 NNW VEC1 23 NNW RMY 22
11/3  55/36/46/0/0.00/0.0/541/88          32 SW  VEC1 33 SSW RMY 33
11/4  59/44/52/+6/0.00/0.0/049/08         32 SW  VEC1 31 SW  RMY 32
11/5  61/42/52/+6/0.00/0.0/360/59         24 NNW VEC1 27 NNW RMY 27
11/6  50/40/45/+/0.00/0.0/067/11          28 S   VEC1 27 S   RMY 25
11/7  65/46/56/+11/0.05/0.0/272/45        38 WNW VEC1 37 WNW RMY 37
11/8  48/33/41/-4/0.00/0.0/440/73         36 NNW VEC1 38 NNW RMY 39
11/9  42/32/37/+7/0.11/T/000/00           20 WNW VEC1 20 WNW RMY 20
11/10 49/38/44/0/0.00/0.0/024/04          23 W   VEC1 23 W   RMY 22
11/11 49/30/40/-3/0.00/0.0/590/99         29 NW  VEC1 26 NW  RMY 30
11/12 41/27/34/-9/0.00/0.0/475/80         20 N   VEC1 19 N   RMY 19
11/13 44/24/34/-9/T/T/456/77              20 NNW VEC1 20 N   RMY 19
11/14 47/31/39/-3/0.00/0.0/342/58         29 NW  VEC1 29 NW  RMY 29
11/15 50/30/40/-2/0.00/0.0/475/81         30 SW  VEC1 30 SW  RMY 31
11/16 62/40/51/+9/0.00/0.0/…/..         30 WSW VEC1 31 WSW RMY 31

11/17 The low since midnight is 43F, the daily normal low is 33F

————————————————————–

NOVEMBER DAILY RECORDS TO DATE

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

————————————————————–

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

RECORDS FOR NOVEMBER 17
HIGH 74 IN 1928
LOW 10 IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

RECORDS FOR NOVEMBER 18
HIGH 72 IN 1963
LOW 10 IN 1936
PRECIP 1.80 INS IN 1929
SNOWFALL 6.3 INS IN 1980
PEAK GUST 60 SW IN 1987

TODAY’S REPORT PREPARED BY: Amanda Joly

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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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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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