Monday, November 27, 2023

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

MONDAY, NOVEMBER 27, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0649E
SUNSET:  1614E

DECENT RAINFALL OVERNIGHT, TURNING COOLER AND BREEZY TODAY…

Rain began between 9-10pm last evening and continued until just
after 5am this morning. 0.56″ of rain fell from this quick
hitting event. Temperatures spiked to the low 50s during the
wee hours of the morning, but began to fall immediately after
the frontal passage just after 5am. Readings reached the low
40s by 8am.

Clouds cleared out early giving us a rather nice day today
with sunshine now mixing with some diurnal clouds as we move
through the early afternoon hours. Temperatures have rebounded
back to near 50F. The dew point however has been gradually
settling back into the upper 30s.

The wind has been busy today, with strong gusts overnight as
the low pressure was approaching the region. The peak gust
was 46mph, occurring just after 2am this morning. Frequent
gusts of 20-30mph have been occurring from the late morning
hours into this afternoon. The average speed for the day is
around 17mph to this point.

Visibility has been excellent today with the view generally
between 60-70 miles today.

The maximum temperature so far today is 53F degrees, this is
7 degrees above the normal high of 46F. The minimum temperature
since midnight is 43F, this is 13 degrees above the normal low
of 30F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratus fractus all quadrants, few stratocumulus
distant SW-NNW, few altocumulus distant NNE-SE-SW
Temperature: 44F; Dew Point: 43F; Relative Humidity: 96%
Wind: WSW @ 10G17 kts
Sea-level pressure: 1002.8 mb; 29.61 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 53F
6-hr Min temp: 44F
24-hr Precip:  0.56 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 60 028/44/43/2510G17/961/ FEW STFRA ALQDS FEW SC DSNT
SW-NNW FEW AC DSNT NNE-SE-SW/ 8/570 53039 6032/ 70056 10053 20044

10 A.M.
Weather: Scattered altocumulus, few stratocumulus all quadrants
Temperature: 46F; Dew Point: 40F; Relative Humidity: 79%
Wind: W @ 10G17 kts
Sea-level pressure: 1004.7 mb; 29.67 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E100 SCT 60 047/46/40/2810G17/967/ FEW SC ALQDS/ 8/550 51019

1 P.M.
Weather: Broken stratocumulus, broken altocumulus/castellanus, virga
distant WSW-NW
Temperature: 50F; Dew Point: 37F; Relative Humidity: 60%
Wind: WNW @ 14G24 kts
Sea-level pressure: 1003.2 mb; 29.62 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 51F
6-hr Min temp: 43F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E35 BKN 50 BKN 70 032/50/37/2914G24/962/ VIRGA DSNT WSW-NW/
8/580 56015 10051 20043

————————————————————–

SUMMARY FOR SUNDAY, NOVEMBER 26, 2023

TEMPERATURE (DEGREES F)
MAX…….43   NORMAL…..46
MIN…….27   NORMAL…..31
MEAN……35   NORMAL…..38

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-3
TOTAL DEPARTURE FOR THE MONTH…………………-37 [-1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………30  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..619  DEPARTURE…….+36
TOTAL HEATING UNITS FOR THE SEASON………….969  DEPARTURE……-125
TOTAL HEATING UNITS LAST SEASON TO DATE……..884  DEPARTURE…….+85

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)……….E31 SE   @  09:34 P.M.
VECTOR #1 (1-Sec)……….36 SE   @  09:34 P.M.
VECTOR #2 (1-Sec)……….34 SE   @  11:10 P.M.
DAVIS #1……………….30 SE   @  09:34 P.M.
DAVIS #2 ………………32 SE   @  09:29 P.M.
RMY #1 (Instantaneous)…..32 ESE  @  11:08 P.M.
RMY #2 (Instantaneous)…..35 SE   @  11:10 P.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……33      @  09:34 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 ESE  @  11:09 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21      @  11:22 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23      @  11:12 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 ESE  @  11:59 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 SE   @  10:22 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 ESE  @  11:59 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SE   @  10:27 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22      @  11:09 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……11.5 SW [277 total miles] VECTOR #1…………….11.5
VECTOR #2…………….12.4
DAVIS #1……………..11.3 S
DAVIS #2……………..12.3 S
RMY #1……………….11.3 S
RMY #2……………….12.5 S
RICHARDS (C5C)………..11.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.56 DEPARTURE…..+0.41
TOTAL PRECIPITATION FOR THE MONTH…………..2.18 DEPARTURE…..-1.51
TOTAL PRECIPITATION FOR THE YEAR…………..51.37 DEPARTURE…..+3.52

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-1.3
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-2.0

————————————————————–

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/+9/0.00/0.0/574/98         30 WSW VEC1 31 WSW RMY 31
11/17 64/43/54/+13/0.00/0.0/280/48        35 SSW VEC1 36 SSW RMY 37
11/18 56/30/43/+2/0.20/0.0/157/27         35 NW  VEC1 35 NW  RMY 37
11/19 50/29/40/-1/0.00/0.0/475/82         38 WNW VEC1 38 WNW RMY 39
11/20 38/25/32/-8/0.00/0.0/577/100        29 NNW VEC1 32 NNW RMY 33
11/21 39/22/31/-9/0.05/T/363/63           29 SE  VEC1 29 SE  RMY 28
11/22 53/33/43/+3/1.20/T/000/00           38 SE  VEC1 40 SE  RMY 37
11/23 50/36/43/+4/0.00/0.0/…/..         33 NW  VEC1 32 NW  RMY 33
11/24 47/26/37/-2/0.00/0.0/…/..         35 WNW VEC1 33 WNW RMY 33
11/25 35/20/28/-11/0.00/0.0/…/..        26 NW  VEC1 25 NW  RMY 26
11/26 43/27/35/-3/0.08/0.0/…/..         31 SE  VEC1 36 SE  RMY 32

11/27 The low since midnight is 43F, the daily normal low is 30F

————————————————————–

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 27
HIGH 68 IN 1896
LOW 5 IN 1932
PRECIP 2.23 INS IN 2013
SNOWFALL 16.0 INS IN 1898
PEAK GUST 68 NW IN 1997

RECORDS FOR NOVEMBER 28
HIGH 70 IN 1990
LOW 10 IN 1901,1930,1936
PRECIP 1.84 INCHES IN 1889
SNOWFALL 3.0 INS IN 1917
PEAK GUST 90 SSW IN 1958

TODAY’S REPORT PREPARED BY: Matt Douglas