Tuesday, November 28, 2023

Agreement required — click “Accept & Continue” below to review and accept the Data Use & Privacy Policy

Access to this content requires acceptance of our Data Use & Privacy Policy.

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

TUESDAY, NOVEMBER 28, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0650E
SUNSET: 1614E

WINDY AND COLD TODAY AS AN ARCTIC AIR MASS MOVES INTO THE AREA…

A period of clouds early this morning was associated with an
arctic boundary which moved across the region during the mid
morning hours. This boundary arrived here at Blue Hill at
around 9:45am this morning, at which time we saw a sudden
uptick in wind speeds and gusts, as well as a sharp drop in
the dew point.

Once this boundary passed, the skies did clear out for the
most part with mainly sunny skies left in its wake. However
the temperature has only been able to struggle to the upper
30s early this afternoon. These readings are a good 7-10
degrees below the normal high for today! As mentioned, the dew
point has plummeted, going from the mid 20s early this morning
to the upper single digits by early this afternoon.

The wind has been busy as well, really picking up in the strong
cold air advection behind the arctic boundary. Gusts of 35-40mph
have been frequent since the mid morning hours. The peak gust so
far is 41mph, occurring just after 11am this morning. The average
speed for the day is around 14mph to this point.

Visibility has been excellent today with the view generally
between 70-80 miles!

The maximum temperature so far today is 38F degrees, this is
8 degrees below the normal high of 46F. The minimum temperature
since midnight is 31F, this is 1 degree above the normal low
of 30F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast altocumulus, few breaks in overcast all quadrants,
few stratocumulus distant NE-SSW, virga distant WSW-W and distant N-NE
Temperature: 31F; Dew Point: 24F; Relative Humidity: 74%
Wind: W @ 11G17 kts
Sea-level pressure: 1006.4 mb; 29.72 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E80 OVC 70 064/31/24/2811G17/972/ FEW BINOVC ALQDS
FEW SC DSNT NE-SSW VIRGA DSNT WSW-W AND DSNT N-NE/ 8/55/ 53008
10034 20031

10 A.M.
Weather: Clear. few stratocumulus all quadrants, few altocumulus distant
NE-S-W, virga distant SE-S
Temperature: 35F; Dew Point: 17F; Relative Humidity: 47%
Wind: W @ 15G26 kts, peak wind W 30mph at 10:51 A.M.
Sea-level pressure: 1006.2 mb; 29.71 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 062/35/17/2815G26/971/ FEW SC ALQDS FEW AC DSNT NE-S-W
VIRGA DSNT SE-S PK WND 2826/51/ 8/550 58002

1 P.M.
Weather: Scattered stratocumulus, scattered altocumulus, virga all quadrants
Temperature: 37F; Dew Point: 9F; Relative Humidity: 32%
Wind: WNW @ 20G31 kts, peak wind WNW 36mph at 12:53 P.M.
Sea-level pressure: 1005.0 mb; 29.68 in. Hg: falling, then rising
Visibility: 80 miles
6-hr Max temp: 38F
6-hr Min temp: 31F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 60 SCT 80 SCT 80 050/37/9/2920G31/968/ VIRGA ALQDS
PK WND 2931/53/ 8/560 55012 10038 20031

————————————————————–

SUMMARY FOR MONDAY, NOVEMBER 27, 2023

TEMPERATURE (DEGREES F)
MAX…….53 NORMAL…..46
MIN…….34 NORMAL…..30
MEAN……44 NORMAL…..38

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+6
TOTAL DEPARTURE FOR THE MONTH…………………-31 [-1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………21 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH…………..640 DEPARTURE…….+30
TOTAL HEATING UNITS FOR THE SEASON………….990 DEPARTURE……-131
TOTAL HEATING UNITS LAST SEASON TO DATE……..900 DEPARTURE…….+90

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)……….E46 SE @ 02:15 A.M.
VECTOR #1 (1-Sec)……….48 SE @ 03:01 A.M.
VECTOR #2 (1-Sec)……….46 SE @ 02:15 A.M.
DAVIS #1……………….46 SE @ 03:01 A.M.
DAVIS #2 ………………50 S @ 03:35 A.M.
RMY #1 (Instantaneous)…..47 SSE @ 03:26 A.M.
RMY #2 (Instantaneous)…..48 S @ 03:37 A.M.
MERLIN…………………43 SSE
RICHARDS (C5C) (Inst)……47 @ 03:01 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 SE @ 02:23 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32 @ 03:36 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 @ 03:38 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 SSE @ 03:27 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 SE @ 03:02 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..31 SSE @ 03:26 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..33 S @ 03:38 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………31 @ 03:26 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……15.0 WNW [360 total miles] VECTOR #1…………….14.6
VECTOR #2…………….16.1
DAVIS #1……………..14.9 WSW
DAVIS #2……………..15.7 W
RMY #1……………….13.9 W
RMY #2……………….15.8 W
RICHARDS (C5C)………..14.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..2.18 DEPARTURE…..-1.66
TOTAL PRECIPITATION FOR THE YEAR…………..51.37 DEPARTURE…..+3.37

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……-1.4
TOTAL SNOWFALL FOR THE SEASON (2023-2024)…..TRACE DEPARTURE……-2.1

————————————————————–

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 53/34/44/+6/0.48/0.0/…/.. 46 SE VEC1 48 SE RMY 47