Saturday, November 18, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, NOVEMBER 18, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0638E
SUNSET: 1620E
RAINY CONDITIONS WITH TEMPERATURE DROP AFTER MID-MORNING
WIND SHIFT…
Light rain was observed on and off throughout the day, becoming
heavier at times. At total of 0.20 ins has been measured so
far today. Overall this month so far is trending well below
(2.25 inches) normal for precipitation.
The day began with mild, above average temperatures but the
temperatures began to drop after the wind shifted from SSW to WNW
just before 9 AM. The temperature has dropped 10 degrees from 55F
down to 45F since 8 AM.
Winds have been very active again today. Our current peak gust
so far has been about 35 mph, which occurred after our 1 PM
observation.
Visibility steadily increased as the day went on. We had started
the day stuck in the fog with a 1/4 mile of visibility and increased
to 70 miles by 1 PM.
The maximum temperature so far today is 55F, which is 5 degrees
above the normal high of 50F. The minimum temperature since
midnight is 45F, which is 12 degrees above the normal low of 33F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: S @ 9 kts
Sea-level pressure: 1005.5 mb; 29.69 in. Hg: falling unsteadily
Visibility: 1/4 mile, fog
6-hr Max temp: 55F
6-hr Min temp: 55F
24-hr Precip: 0.01 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W3 1/4F 055/55/55/1909/969/ 8//// 57011 70001 10055 20055
10 A.M.
Weather: Broken stratocumulus, overcast stratus, few stratus fractus SSW,
light rain
Temperature: 49F; Dew Point: 49F; Relative Humidity: 98%
Wind: N @ 14G26 kts, Peak Wind: N @ 26 kts (30 MPH) at 09:51 A.M.
Sea-level pressure: 1006.2 mb; 29.71 in. Hg: rising, then more rapidly
Visibility: 15 miles, fog all quadrants
3-hr Precip: 0.18 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E15 BKN 30 OVC 15R- 062/49/49/3514G26/971/ FEW STFRA SSW
THN F ALQDS PK WND 3526/51/ 8/6// 53007 6018/
1 P.M.
Weather: Overcast stratus, few stratus fractus S-NNW, few break in
overcast S-NNW
Temperature: 45F; Dew Point: 43F; Relative Humidity: 91%
Wind: NNW @ 11G21 kts
Sea-level pressure: 1004.2 mb; 29.65 in. Hg: falling steadily
Visibility: 70 miles, 35 miles NE
6-hr Max temp: 55F
6-hr Min temp: 45F
6-hr Precip: 0.19 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E35 OVC 70 042/45/43/3411G21/965/ FEW BINOVC S-NNW
FEW STFRA S-NNW VSBY 35 NE/ 8/6// 57020 6019/ 10055 20045
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SUMMARY FOR FRIDAY, NOVEMBER 17, 2023
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..50
MIN…….43 NORMAL…..33
MEAN……54 NORMAL…..41
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+13
TOTAL DEPARTURE FOR THE MONTH…………………-12 [-0.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………11 DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE MONTH…………..366 DEPARTURE…….+11
TOTAL HEATING UNITS FOR THE SEASON………….716 DEPARTURE……-151
TOTAL HEATING UNITS LAST SEASON TO DATE……..635 DEPARTURE…….+81
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)……….E35 SSW @ 3:03 P.M.
VECTOR #1 (1-Sec)……….36 SSW @ 3:03 P.M.
VECTOR #2 (1-Sec)……….37 SSW @ 4:39 P.M.
DAVIS #1……………….37 S @ 3:29 P.M.
DAVIS #2 ………………44 S @ 4:39 P.M.
RMY #1 (Instantaneous)…..37 SSW @ 3:03 P.M.
RMY #2 (Instantaneous)…..38 SSW @ 4:39 P.M.
MERLIN…………………33 SW
RICHARDS (C5C) (Inst)……36 @ 3:03 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 SSW @ 3:03 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26 @ 4:40 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27 @ 3:04 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 S @ 4:40 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S @ 4:40 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 SSW @ 4:40 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 SSW @ 3:04 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………25 @ 3:03 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….16.1 SSW [387 total miles]
VECTOR #1……………..16.2
VECTOR #2……………..16.7
DAVIS #1………………15.9 SSW
DAVIS #2………………16.9 SSW
RMY #1………………..15.9 SSW
RMY #2………………..16.9 SSW
RICHARDS (C5C)…………15.5
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.18 DEPARTURE…..-2.25
TOTAL PRECIPITATION FOR THE YEAR…………..49.37 DEPARTURE…..+2.78
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
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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/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 64/43/54/+13/…./0.0/…/.. 35 SSW VEC1 36 SSW RMY 37
11/18 The low since midnight is 49F, the daily normal low is 33F
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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 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
RECORDS FOR NOVEMBER 19
HIGH 72 IN 1941
LOW 10 IN 1936
PRECIP 1.92 INCHES IN 1926
SNOWFALL 11.0 INS IN 1986
PEAK GUST 59e E IN 1945
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
