Tuesday, November 12, 2024

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

TUESDAY, NOVEMBER 12, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0632E
SUNSET:  1624E

A MIX OF SUN AND CLOUDS WITH GUSTY WINDS AND COOLER TEMPERATURES….

Strong cold air advection is taking place today with a very gusty
north-northwesterly flow and steady temperatures this morning
starting to fall a bit this afternoon, despite a decent amount of
sunshine mixed with some stratocumulus clouds.

The highest temperature of the day was actually at midnight when it
was 54F degrees. It fell into the mid 40s prior to sunrise, then only
rose to the low 50s during the mid morning period before starting to
drop back into the mid to upper 40s early this afternoon. The dew
point has also been gradually declining, dropping from the low 40s
early this morning to the upper 20s just after the 1pm observation.

Winds are quite busy today with the north-northwest flow averaging
at around 16mph. While it was breezy overnight into early this
morning, the wind really ramped up after 8am with frequent gusts
over 30mph, and several over 40mph. The peak gust for the day to
this point is 48mph, which occurred at 12:42pm this afternoon.

Visibility has been generally around 70 miles with a period during
the mid morning hours where it was as high as 80 miles.

The maximum temperature for today since midnight is 54 degrees, this
is 3 degrees above the normal high of 51F. The minimum temperature
since midnight is 46F degrees, which is 11 degrees above the normal
low of 35F degrees.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus
Temperature: 48F; Dew Point: 39F; Relative Humidity: 69%
Wind: WNW @ 12G19 kts
Sea-level pressure: 1007.2 mb; 29.74 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 51F
6-hr Min temp: 46F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E50 BKN 70 072/48/39/3012G19/974/ 8/500 53025 10051 20046

10 A.M.
Weather: Scattered stratocumulus, virga distant NW-N
Temperature: 50F; Dew Point: 33F; Relative Humidity: 51%
Wind: NNW @ 18G27 kts, peak wind NW 37mph at 9:28 A.M.
Sea-level pressure: 1011.2 mb; 29.86 in. Hg: rising, then more slowly
Visibility: 80 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 40 SCT 80 112/50/33/3318G27/986/ VIRGA DSNT NW-N
PK WND 3232/28/ 8/500 51040

1 P.M.
Weather: Scattered stratocumulus
Temperature: 48F; Dew Point: 30F; Relative Humidity: 49%
Wind: NNW @ 22G33 kts, peak wind NNW 48mph at 12:42 P.M.
Sea-level pressure: 1013.5 mb; 29.93 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 51F
6-hr Min temp: 47F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 45 SCT 70 135/48/30/3322G33/993/ PK WND 3342/42/
8/500 51023 10051 20047

————————————————————–

SUMMARY FOR MONDAY, NOVEMBER 11, 2024

TEMPERATURE (DEGREES F)
MAX…….66  NORMAL…..52
MIN…….50  NORMAL…..35
MEAN……58  NORMAL…..43

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+15
TOTAL DEPARTURE FOR THE MONTH…………………….+79 [+7.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….7  DEPARTURE…….-15
TOTAL HEATING UNITS FOR THE MONTH…………..144  DEPARTURE…….-75
TOTAL HEATING UNITS FOR THE SEASON………….517  DEPARTURE……-214
TOTAL HEATING UNITS LAST SEASON TO DATE……..578  DEPARTURE…….-61

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)………..40 SW   @   04:15 A.M.
VECTOR #1 (1-Sec)……….42 SW   @   04:15 A.M.
VECTOR #2 (1-Sec)……….43 SW   @   04:15 A.M.
DAVIS #1……………….39 SW   @   04:15 A.M.
DAVIS #2 ………………43 WSW  @   04:15 A.M.
RMY #1 (Instantaneous)…..43 SW   @   04:15 A.M.
RMY #2 (Instantaneous)…..44 SW   @   04:15 A.M.
MERLIN…………………40 SW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 SW   @   04:13 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29      @   04:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30      @   04:16 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 SW   @   04:16 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 SW   @   04:16 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..29 SW   @   04:16 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 SW   @   04:16 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..14.6 W [351 total miles] VECTOR #1………………14.3
VECTOR #2………………14.8
DAVIS #1……………….14.8 WSW
DAVIS #2……………….15.0 W
RMY #1…………………13.8 WSW
RMY #2…………………14.6 WSW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.08 DEPARTURE…..-1.53
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.88 DEPARTURE…..-1.89

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….0.0 DEPARTURE……-1.1

————————————————————–

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   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/…/..       37 WNW VEC1 35 WNW RMY 42
11/8   63/41/52/+7/0.00/0.0/…/..        42 WNW VEC1 42 WNW RMY 47
11/9   50/36/43/-1/0.00/0.0/…/..        40 NW  VEC1 42 NW  RMY 43
11/10  60/32/46/+2/T/0.0/…/..           29 WSW VEC1 29 SW  RMY 31
11/11  66/50/58/+15/0.08/0.0/…/..       40 SW  VEC1 42 SW  RMY 43

11/12 The low since midnight is 46F, the daily normal low is 35F.

————————————————————–

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.

————————————————————–

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

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.39 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

RECORDS FOR NOVEMBER 13
HIGH 66 IN 1931, 1964
LOW 14 IN 1920
PRECIP 1.96 INCHES IN 1982
SNOWFALL 4.6 IN 2004
PEAK GUST 77 S IN 1982

TODAY’S REPORT PREPARED BY: Matt Douglas