Sunday, December 1, 2024

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

SUNDAY, DECEMBER 1, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0654E
SUNSET:  1612E

CHILLY AND DRY FOR THE FIRST DAY OF METEOROLOGICAL WINTER….

This morning featured a beautiful orange sunrise with mostly clear
skies. We had a brief period mid morning with overcast conditions,
but we were able to clear things out again by 1pm. Offshore clouds
continued to linger about with ocean-effect convection in the area.

Temperatures have stayed below normal all day and the dry air continues
to dominate our weather. Dew points have not even reached 20F by our
final observation.

Winds have remained relatively light again today and mostly out of the
west and west southwest direction. The average speed has been around
10mph and our peak gust of 23mph occurred around 9:30am, which was
almost identical to yesterday’s wind profile.

Visibility has held between 50-60 miles throughout most of the day.

The maximum temperature for today is 37F degrees, which is 8 degrees
below the normal high of 45F. The minimum temperature since midnight
is 23F degrees, which is 6 degrees below the normal low of 29F.

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PRELIMINARY STATS FOR NOVEMBER 2024

TEMPERATURE, Deg. F
Avg. Max. 54.6 [+4.5] Avg. Min. 37.4 [+3.6] Mean      46.0 [+4.0] 24-hour corrected mean: 45.8
Max. for month: 80F on the 6th
Min. for month: 26F on the 30th

HEATING DEGREE DAYS
Total heating units:    570 [-122] Total for the season:   943 [-261] Total for last season: 1087

COOLING DEGREE DAYS
Total cooling units:      5 [+005] Total for the season:   768 [+091] Total for last season:  715

PRECIPITATION, Inches
Total: 3.67 [-0.64] Greatest in 24 hrs: 1.61 on the 21st-22nd

SNOWFALL, Inches
Total: 0.0 [-1.8] Greatest in 24 hrs: 0.0 on the N/A

WIND, mph
Avg. uncorrected wind speed: 12.5 mph
Avg. corrected wind speed:   12.9 mph
Prevailing wind direction:   Northwest [22%] Peak gust and direction:  52 WNW on the 24th

SUNSHINE:
Campbell-Stokes card minutes: 12282 of a possible 17010, or 72%
Astronomical total minutes: 12709 of a possible 17592 or 72%

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Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus/castellanus along horizon
all quadrants
Temperature: 24F; Dew Point: 18F; Relative Humidity: 79%
Wind: W @ 8 kts
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: Falling, then rising
Visibility: 50 miles
6-hr Max temp: 27F
6-hr Min temp: 23F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 50 163/24/18/2608/001/ FEW AC/ACC ALNG HRZN ALQDS/
8/080 53007 10027 20023

10 A.M.
Weather: Overcast cirrus, few breaks in overcast all quadrants, few
cumulus offshore distant NE-E-ESE and moderate cumulus distant SSE-SSW
Temperature: 29F; Dew Point: 17F; Relative Humidity: 58%
Wind: W @ 8 kts
Sea-level pressure: 1016.9 mb; 30.03 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E250 OVC 60 169/29/17/2608/003/ FEW BINOVC ALQDS FEW CU
OFFSHR DSNT NE-E-ESE AND MDT CU OFFSHR DSNT SSE-SSW/ 8/202 50006

1 P.M.
Weather: Clear, few stratocumulus WSW-NNE, few cumulus offshore distant
E-S-SSW, few cirrus distant E-S-SW
Temperature: 36F; Dew Point: 18F; Relative Humidity: 47%
Wind: WSW @ 8 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 37F
6-hr Min temp: 23F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 50 151/36/18/2507/998/ FEW SC WSW-NNE FEW CU
OFFSHR DSNT E-S-SSW FEW CI DSNT E-S-SW/ 8/801 56018 10037 20023

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SUMMARY FOR SATURDAY, NOVEMBER 30, 2024

TEMPERATURE (DEGREES F)
MAX…….40  NORMAL…..45
MIN…….26  NORMAL…..29
MEAN……33  NORMAL…..37

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-4
TOTAL DEPARTURE FOR THE MONTH……………………+127 [+4.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………32  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………..570  DEPARTURE……-122
TOTAL HEATING UNITS FOR THE SEASON………….943  DEPARTURE……-261
TOTAL HEATING UNITS LAST SEASON TO DATE…….1087  DEPARTURE……-144

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)………..23 W    @   09:38 A.M.
VECTOR #1 (1-Sec)……….23 W    @   09:38 A.M.
VECTOR #2 (1-Sec)……….24 WNW  @   05:05 P.M.
DAVIS #1……………….23 W    @   03:02 P.M.
DAVIS #2 ………………23 WNW  @   05:10 P.M.
RMY #1 (Instantaneous)…..23 WNW  @   05:05 P.M.
RMY #2 (Instantaneous)…..25 WNW  @   05:05 P.M.
MERLIN…………………22 W
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 W    @   09:00 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @   08:27 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18      @   05:41 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 W    @   08:27 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW  @   05:41 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 W    @   08:27 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 WNW  @   05:41 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.6 W [254 total miles] VECTOR #1………………10.6
VECTOR #2………………11.0
DAVIS #1……………….11.2 W
DAVIS #2……………….11.0 WNW
RMY #1…………………10.1 W
RMY #2…………………10.8 W
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..3.67 DEPARTURE…..-0.64
TOTAL PRECIPITATION FOR THE YEAR (2024)…….47.47 DEPARTURE…..-1.00

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE……-1.8
TOTAL SNOWFALL FOR THE SEASON (2024-2025)…….0.0 DEPARTURE……-2.5

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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        51 ENE VEC1 50 ENE RMY 52
11/22  52/40/46/+6/0.55/0.0/372/65        44 E   VEC1 47 E   RMY 45
11/23  44/38/41/+2/0.71/0.0/000/00        46 NW  VEC1 45 NW  RMY 49
11/24  48/35/42/+3/0.00/0.0/523/92        52 WNW VEC1 53 WNW RMY 53
11/25  49/32/41/+2/0.00/0.0/556/98        33 WNW VEC1 34 WNW RMY 34
11/26  44/35/40/+2/0.37/0.0/062/11        28 WNW VEC1 29 NW  RMY 28
11/27  49/33/41/+3/0.00/0.0/513/91        25 W   VEC1 25 W   RMY 25
11/28  45/36/41/+3/0.69/0.0/000/00        35 NW  VEC1 35 NW  RMY 35
11/29  44/32/38/0/0.00/0.0/410/73         36 WNW VEC1 36 WNW RMY 37
11/30  40/26/33/-4/0.00/0.0/521/93        23 W   VEC1 23 W   RMY 23

12/1 The low since midnight is 23F, the daily normal low is 29F.

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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 DECEMBER 1
HIGH 70 IN 2001
LOW 3 IN 1887
PRECIP 1.46 INS. IN 1917
SNOW 5.7 INS. IN 2019
PEAK GUST 72 MPH NW IN 1964

RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942

TODAY’S REPORT PREPARED BY: Amanda Joly