Saturday, November 23, 2024

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

SATURDAY, NOVEMBER 23, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0645E
SUNSET:  1616E

CHILLY AND BREEZY AS RAIN TAPERS OFF….

The anticipated second round of rain yesterday evening through this
morning did not disappoint, providing us with an additional 0.89″ of much
needed rainfall. Light rain through the morning hours began to taper
as we approached noon. Skies remain gray, though some breaks in the
overcast are visible in the distance to our northwest.

The temperature has not changed much today. The high so far of 42F
occurred between 6-7am this morning, before the northwesterly breeze
picked up and the temperature retreated to the upper 30s. As of
the final observation, we are finally back to the low 40s.

After being relatively quiet overnight, winds have begun to ramp back
up. Our average speed for the day so far is 11mph, though the past
few hours have been higher than that. The peak gust so far is 30mph,
occurring at 12:30pm.

Visibility has been improving. We were briefly in the clouds this morning,
when fog limited views to 1/2 of a mile. Since then, as the cloud base has
risen, we can see 60 miles.

The maximum temperature for today is 42 degrees, which is 5 degrees
below the normal high of 47F. The minimum temperature since midnight
is 38F degrees, which is 6 degrees above the normal low of 32F.

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Today’s Observations:

7 A.M.
Weather: Light rain and fog, sky obscured, vertical visibility 200ft
Temperature: 42F; Dew Point: 42F; Relative Humidity: 100%
Wind: NNW @ 10G17 kts
Sea-level pressure: 993.2 mb; 29.33 in. Hg: falling, then steady
Visibility: 1/2 mile, fog
6-hr Max temp: 42F
6-hr Min temp: 40F
24-hr Precip:  0.71 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/2R-F 932/42/42/3310G17/933/ 8//// 56010 70071
10042 20040

10 A.M.
Weather: Light rain, broken stratus fractus, overcast nimbostratus
Temperature: 39F; Dew Point: 39F; Relative Humidity: 100%
Wind: NW @ 14G24 kts
Sea-level pressure: 992.6 mb; 29.31 in. Hg: falling, then steady
Visibility: 20 miles, thin fog all quadrants
3-hr Precip:  0.16 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E25 BKN 45 OVC 20R- 926/39/39/3214G24/931/ THN F ALQDS/ 8/72/
56006 6016/

1 P.M.
Weather: Scattered stratocumulus, overcast altostratus, few breaks in
overcast distant W-N, virga distant NE-SE-S
Temperature: 41F; Dew Point: 39F; Relative Humidity: 92%
Wind: NW @ 16G24 kts, peak wind NW 30mph @ 12:30pm
Sea-level pressure: 991.5 mb; 29.28 in. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 42F
6-hr Min temp: 38F
6-hr Precip:  0.19 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 25 SCT E50 OVC 60 915/41/39/3216G24/928/ FEW BINOVC DSNT W-N
VIRGA DSNT NE-SE-S PK WND 3226/30/ 8/52/ 56011 6019/ 10042 20038

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SUMMARY FOR FRIDAY, NOVEMBER 22, 2024

TEMPERATURE (DEGREES F)
MAX…….52  NORMAL…..48
MIN…….40  NORMAL…..32
MEAN……46  NORMAL…..40

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+6
TOTAL DEPARTURE FOR THE MONTH……………………+116 [+5.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………19  DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH…………..367  DEPARTURE……-111
TOTAL HEATING UNITS FOR THE SEASON………….740  DEPARTURE……-250
TOTAL HEATING UNITS LAST SEASON TO DATE……..852  DEPARTURE……-112

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….5  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….768  DEPARTURE…….+91
TOTAL COOLING UNITS LAST SEASON TO DATE……..715  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)………..44 E    @   02:08 A.M.
VECTOR #1 (1-Sec)……….47 E    @   01:02 A.M.
VECTOR #2 (1-Sec)……….41 S    @   03:45 A.M.
DAVIS #1……………….46 S    @   03:52 A.M.
DAVIS #2 ………………51 S    @   03:45 A.M.
RMY #1 (Instantaneous)…..45 E    @   01:02 A.M.
RMY #2 (Instantaneous)…..43 S    @   03:45 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 S    @   03:52 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27      @   03:52 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29      @   03:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 E    @   12:48 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………34 S    @   03:46 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 E    @   12:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 S    @   03:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.4 S [297 total miles] VECTOR #1………………12.5
VECTOR #2………………13.2
DAVIS #1……………….12.2 SSE
DAVIS #2……………….12.9 SSE
RMY #1…………………12.2 SSE
RMY #2…………………13.2 SE
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.71 DEPARTURE…..+0.57
TOTAL PRECIPITATION FOR THE MONTH…………..2.42 DEPARTURE…..-0.69
TOTAL PRECIPITATION FOR THE YEAR (2024)…….46.22 DEPARTURE…..-1.05

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.9
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….0.0 DEPARTURE……-1.6

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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   77/49/63/+16/0.00/0.0/347/56       36 WNW VEC1 36 WNW RMY 37
11/2   55/37/46/-1/0.00/0.0/228/37        21 N   VEC1 23 N   RMY 21
11/3   48/30/39/-7/0.00/0.0/595/97        20 NNW VEC1 21 NNW RMY 21
11/4   49/33/41/-5/0.00/0.0/061/10        20 SSE VEC1 21 SSE RMY 21
11/5   73/46/60/+15/0.00/0.0/505/83       35 SW  VEC1 35 SW  RMY 37
11/6   80/59/70/+25/0.00/0.0/558/92       39 WSW VEC1 39 WSW RMY 42
11/7   69/47/58/+13/0.00/0.0/519/86       37 WNW VEC1 35 WNW RMY 42
11/8   63/41/52/+7/0.00/0.0/572/95        42 WNW VEC1 42 WNW RMY 47
11/9   50/36/43/-1/0.00/0.0/599/100       40 NW  VEC1 42 NW  RMY 43
11/10  60/32/46/+2/T/0.0/388/65           29 WSW VEC1 29 SW  RMY 31
11/11  66/50/58/+15/0.08/0.0/457/77       40 SW  VEC1 42 SW  RMY 43
11/12  54/33/44/+1/0.00/0.0/545/92        48 NNW VEC1 50 NNW RMY 56
11/13  43/28/36/-7/0.00/0.0/584/99        32 N   VEC1 33 N   RMY 31
11/14  42/27/35/-7/0.00/0.0/542/92        22 NE  VEC1 22 NE  RMY 22
11/15  58/27/43/+1/0.00/0.0/580/99        28 NW  VEC1 28 NW  RMY 30
11/16  60/38/49/+7/0.00/0.0/572/98        33 NNW VEC1 35 NNW RMY 35
11/17  62/40/51/+10/0.00/0.0/553/95       26 NW  VEC1 26 NW  RMY 26
11/18  61/43/52/+11/T/0.0/418/72          29 NW  VEC1 28 NW  RMY 31
11/19  56/39/48/+7/0.00/0.0/565/98        29 NW  VEC1 29 NW  RMY 30
11/20  52/36/44/+4/T/0.0/564/98           21 E   VEC1 21 E   RMY 21
11/21  44/43/44/+4/1.27/0.0/000/00        50 ENE VEC1 50 ENE RMY 52
11/22  52/40/46/+6/…/0.0/…/..         44 E   VEC1 47 E   RMY 45

11/23 The low since midnight is 38F, the daily normal low is 32F.

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NOVEMBER DAILY RECORDS TO DATE

11/1 RECORD HIGH TEMPERATURE OF 77F, OLD RECORD WAS 75F IN 2003.

11/6 RECORD HIGH TEMPERATURE OF 80F, OLD RECORD WAS 74F IN 2022.

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

RECORDS FOR NOVEMBER 23
HIGH 73 IN 1931
LOW 9 IN 1888, 2018
PRECIP 2.33 INS IN 2006
SNOWFALL 5.5 INS IN 1989
PEAK GUST 64e S IN 1953

RECORDS FOR NOVEMBER 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959

TODAY’S REPORT PREPARED BY: Joshua Polen