Wednesday, November 1, 2023

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

WEDNESDAY, NOVEMBER 1, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0617E
SUNSET:  1638E

FIRST TASTE OF WINTER ATOP BLUE HILL…

Today we received our first wintry precipitation of the season,
with ice pellets mixing with rain briefly between 9 and 10am
this morning, only accumulating to a trace. Otherwise, there
has been a raw feel with much cooler than normal temperatures,
a gentle breeze, and a largely cloud-filled sky.

The temperature began the day in the upper 30s, and stubbornly
hovered there until reaching the low 40s by early afternoon.
The dew point has remained fairly steady all day in the low to
mid 30s.

The wind remains sluggish today, with an average so far of
9mph. It began the morning by coming from the ENE off the ocean,
but by late morning had backed to the NNW. The peak gust of 23mph
occurred just before 5:30am.

Visibility has been good, beginning at 40 miles and rising
to 70 miles by this afternoon. The only limitation was virga late
morning limiting it to 15 miles to the east.

The maximum temperature so far today is 42F, which is 13 degrees
below the normal high of 55F. The minimum temperature since
midnight is 37F, which is 1 degree below the normal low of 38F.

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PRELIMINARY STATS FOR OCTOBER 2023

TEMPERATURE, Deg. F
Avg. Max. 65.5 [+4.5] Avg. Min. 49.4 [+5.4] Mean      57.5 [+5.0] 24-hour corrected mean: 56.2
Max. for month: 81F on the 3rd and 4th
Min. for month: 35F on the 31st

HEATING DEGREE DAYS
Total heating units:    251 [-143] Total for the season:   350 [-162] Total for last season:  413

COOLING DEGREE DAYS
Total cooling units:    026 [+019] Total for the season:   715 [+038] Total for last season:  884

PRECIPITATION, Inches
Total: 1.97 [-3.52] Greatest in 24 hrs: 0.76 on the 21st

SNOWFALL, Inches
Total: 0.0 [-0.7] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 9.0 mph
Avg. corrected wind speed:   9.6 mph
Prevailing wind direction:   Southwest [13%] Peak gust and direction:  40 NW on the 21st

SUNSHINE:
Campbell-Stokes card minutes: 11160 of a possible 19824, or 56%
Astronomical total minutes: 11581 of a possible 20564, or 56%

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, broken altocumulus
Temperature: 39F; Dew Point: 31F; Relative Humidity: 72%
Wind: NNE @ 4 kts, wind light
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: falling then rising
Visibility: 40 miles
6-hr Max temp: 39F
6-hr Min temp: 37F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
BHO SA 1155 E40 BKN 100 BKN 40 146/39/31/0204/996/ HAZY WND LGT/ 8/550
55001 10039 20037

10 A.M.
Weather: Broken stratocumulus, overcast nimbostratus, few breaks in overcast
all quadrants, virga all quadrants
Temperature: 38F; Dew Point: 34F; Relative Humidity: 84%
Wind: NNW @ 9 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: rising, then steady
Visibility: 60 miles, 15 miles ENE-ESE
3-hr Precip: Trace
3-hr Snowfall: Trace
BHO SA 1455 E35 BKN 65 OVC 60 151/38/34/3409/998/ FEW BINOVC ALQDS
VIRGA ALQDS INTMT RW-IP-B16E53 VSBY 15 ENE-ESE TOTAL NEW SNW PST 3HRS TRACE/
8/52/ 51005 6000/

1 P.M.
Weather: Broken stratocumulus, overcast altostratus, virga NE-S-SW
Temperature: 41F; Dew Point: 32F; Relative Humidity: 69%
Wind: N @ 4 kts, wind light
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 42F
6-hr Min temp: 37F
6-hr Precip: Trace
6-hr Snowfall: Trace
BHO SA 1755 E45 BKN 85 OVC 70 159/41/32/0104/000/ VIRGA NE-S-SW WND LGT
TOTAL NEW SNW PST 6HRS TRACE/ 8/52/ 53008 6000/ 10042 20037

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SUMMARY FOR TUESDAY, OCTOBER 31, 2023

TEMPERATURE (DEGREES F)
MAX…….48   NORMAL…..56
MIN…….35   NORMAL…..39
MEAN……42   NORMAL…..47

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-5
TOTAL DEPARTURE FOR THE MONTH………………..+161 [+5.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………..251  DEPARTURE……-143
TOTAL HEATING UNITS FOR THE SEASON………….350  DEPARTURE……-162
TOTAL HEATING UNITS LAST SEASON TO DATE……..413  DEPARTURE…….-63

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………26  DEPARTURE…….+19
TOTAL COOLING UNITS FOR THE SEASON………….715  DEPARTURE…….+38
TOTAL COOLING UNITS LAST SEASON TO DATE……..884  DEPARTURE……-169

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)……….E25 NNW  @  12:03 A.M.
VECTOR #1 (1-Sec)……….24 NNW  @  12:17 A.M.
VECTOR #2 (1-Sec)……….24 NNW  @  12:17 A.M.
DAVIS #1……………….24 NW   @  12:03 A.M.
DAVIS #2 ………………23 N    @  04:09 A.M.
RMY #1 (Instantaneous)…..26 NNW  @  12:03 A.M.
RMY #2 (Instantaneous)…..25 NNW  @  12:17 A.M.
MERLIN…………………22 N
RICHARDS (C5C) (Inst)……24      @  12:03 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 NNW  @  12:05 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @  12:18 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16      @  12:18 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 NNW  @  12:18 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 N    @  12:18 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 NNW  @  12:18 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NNW  @  12:18 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16      @  12:18 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..7.5 NNW [180 total miles] VECTOR #1………………8.3
VECTOR #2………………8.7
DAVIS #1……………….8.3 NNE
DAVIS #2……………….8.5 NE
RMY #1…………………8.1 NNE
RMY #2…………………8.6 NNE
RICHARDS (C5C)………….8.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..1.97 DEPARTURE…..-3.52
TOTAL PRECIPITATION FOR THE YEAR…………..49.19 DEPARTURE…..+5.03

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PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

10/1  68/50/59/+1/0.00/458/65             20 NNE VEC1 20 NNE RMY 19
10/2  68/55/62/+4/0.00/681/97             24 NE  VEC1 23 NE  RMY 24
10/3  81/54/68/+11/0.00/672/96            18 WSW VEC1 18 WSW RMY 18
10/4  81/64/73/+16/0.00/669/96            17 S   VEC1 17 S   RMY 16
10/5  77/59/68/+11/0.00/638/92            24 S   VEC1 24 S   RMY 23
10/6  71/60/66/+10/0.00/269/39            20 SE  VEC1 19 SE  RMY 18
10/7  68/54/61/+5/0.16/007/01             30 WNW VEC1 29 WNW RMY 29
10/8  63/48/56/+1/0.00/651/95             30 W   VEC1 30 WNW RMY 30
10/9  61/44/53/-2/0.00/532/78             25 WSW VEC1 24 WSW RMY 25
10/10 64/47/56/+1/T/245/36                23 W   VEC1 22 W   RMY 21
10/11 68/50/59/+5/0.00/393/58             23 SSW VEC1 22 SW  RMY 22
10/12 69/51/60/+6/0.00/479/71             18 NW  VEC1 18 NNW RMY 18
10/13 61/43/52/-2/0.00/638/95             33 NW  VEC1 31 NW  RMY 34
10/14 60/44/52/-1/0.00/247/37             24 NW  VEC1 23 NW  RMY 23
10/15 59/44/52/-1/0.00/226/34             24 NNW VEC1 25 NNW RMY 25
10/16 58/44/51/-1/0.07/166/25             17 WNW VEC1 17 WNW RMY 17
10/17 60/45/53/+1/T/211/32                15 N   VEC1 15 N   RMY 14
10/18 62/49/56/+4/0.00/079/12             15 SSW VEC1 15 SSW RMY 16
10/19 65/50/58/+8/0.00/557/85             31 SSW VEC1 30 SSW RMY 33
10/20 63/55/57/+6/0.01/000/00             28 SSE VEC1 26 SE  RMY 26
10/21 58/52/55/+4/0.76/000/00             40 NW  VEC1 41 NW  RMY 44
10/22 56/45/51/+1/0.00/382/59             36 WNW VEC1 35 WNW RMY 36
10/23 62/42/52/+2/0.01/386/60             24 NW  VEC1 22 NNW RMY 23
10/24 61/41/51/+1/0.00/424/66             28 SW  VEC1 26 SW  RMY 29
10/25 75/50/63/+14/0.00/472/74            26 SSW VEC1 26 SSW RMY 27
10/26 79/59/69/+20/0.00/515/81            20 WSW VEC1 19 WSW RMY 20
10/27 77/59/68/+19/0.00/380/60            23 WSW VEC1 22 WSW RMY 23
10/28 80/57/69/+21/0.00/625/99            31 W   VEC1 31 W   RMY 31
10/29 57/44/51/+3/0.41/000/00             25 E   VEC1 24 E   RMY 25
10/30 52/41/47/-1/0.55/000/00             25 NNW VEC1 25 NNW RMY 27
10/31 48/35/42/-5/0.00/579/93             25 NNW VEC1 24 NNW RMY 26

11/1 The low since midnight is 37F, the daily normal low is 38F

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OCTOBER DAILY RECORDS TO DATE

.NONE…

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

RECORDS FOR NOVEMBER 1
HIGH 75 IN 2003
LOW 22 IN 1913,1923
PRECIP 2.37 INCHES IN 1988
SNOWFALL TRACE IN 1906,1951
PEAK GUST 78 ESE IN 1997

RECORDS FOR NOVEMBER 2
HIGH 81 IN 1950
LOW 22 IN 1965
PRECIP 1.67 INCHES IN 1970
SNOWFALL 1.8 IN 2014
PEAK GUST 63 WSW IN 1973

TODAY’S REPORT PREPARED BY: Joshua Polen/Matt Douglas