Monday, October 2, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, OCTOBER 2, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0542E
SUNSET: 1724E
WILDFIRE SMOKE MOVED OUT OVERNIGHT, A SPLENDID FALL DAY WITH PLENTY
OF SUNSHINE AND COMFORTABLY DRY AIR…
Skies are clear once again today, except we can actually see it
this time as all the smoke from yesterday has departed the region.
Only a few clouds have been visible, mostly off in the distance.
Temperatures are warming nicely into the upper 60s with the dew
point dropping into the upper 40s. This is very delightful air and
a welcomed treat after the rainy spell we had over the weekend.
The wind has been a bit brisk out of the north-northeast to northeast.
The average speed for the day so far is around 11mph with gusts of
20-25mph occurring.
Visibility is much improved over yesterday with views of 40-60 miles
today.
The maximum temperature so far today has been 68F, which is
2 degrees above the normal high of 66F. The minimum temperature
since midnight is 57F, which is 8 degrees above the normal low
of 49F.
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PRELIMINARY STATS FOR SEPTEMBER 2023
TEMPERATURE, Deg. F
Avg. Max. 72.5 [-0.2]
Avg. Min. 58.4 [+2.8]
Mean 65.5 [+1.3]
24-hour corrected mean: 64.6
Max. for month: 92F on the 7th
Min. for month: 46F on the 27th
HEATING DEGREE DAYS
Total heating units: 98 [-002]
Total for the season: 99 [-019]
Total for last season: 99
COOLING DEGREE DAYS
Total cooling units: 119 [+045]
Total for the season: 689 [+019]
Total for last season: 884
PRECIPITATION, Inches
Total: 6.77 [+2.71]
Greatest in 24 hrs: 1.92 on the 13th
SNOWFALL, Inches
Total: 0.0 [0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 9.6 mph
Avg. corrected wind speed: 10.2 mph
Prevailing wind direction: East-northeast [16%]
Peak gust and direction: 44 WNW on the 17th
SUNSHINE:
Campbell-Stokes card minutes: 11454 of a possible 22582, or 53%
Astronomical total minutes: 11917 of a possible 22465, or 53%
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus W-NNE, few cirrus distant SW-WNW
Temperature: 60F; Dew Point: 52F; Relative Humidity: 74%
Wind: NNE @ 10 kts
Sea-level pressure: 1022.8 mb; 30.20 in. Hg: rising, then falling
Visibility: 40 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 57F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 40 228/60/52/0310/020/ FEW AC W-NNE FEW CI DSNT SW-WNW
THN K LYR ALQDS HAZY/ 8/051 50005 10060 20057
10 A.M.
Weather: Clear, few cirrus distant SW-N
Temperature: 65F; Dew Point: 47F; Relative Humidity: 52%
Wind: NE @ 10G20 kts
Sea-level pressure: 1023.5 mb; 30.22 in. Hg: rising, then falling
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 50 235/65/47/0510G20/022/ FEW CI DSNT SW-N/ 8/001 50007
1 P.M.
Weather: Clear, few cumulus distant WSW-NW, few cirrus all quadrants
Temperature: 66F; Dew Point: 48F; Relative Humidity: 51%
Wind: ENE @ 6 kts, wind light
Sea-level pressure: 1023.0 mb; 30.21 in. Hg: steady, then falling
Visibility: 60 miles
6-hr Max temp: 68F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 60 230/66/48/0606/021/ FEW CU DSNT WSW-NW FEW CI ALQDS
WND LGT/ 8/201 58005 10068 20060
————————————————————–
SUMMARY FOR SUNDAY, OCTOBER 1, 2023
TEMPERATURE (DEGREES F)
MAX…….68 NORMAL…..67
MIN…….50 NORMAL…..50
MEAN……59 NORMAL…..58
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH………………….+1 [+0.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….6 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………….6 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON………….105 DEPARTURE…….-20
TOTAL HEATING UNITS LAST SEASON TO DATE……..112 DEPARTURE……..-7
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….689 DEPARTURE…….+18
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-195
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)……….E20 NNE @ 10:50 P.M.
VECTOR #1 (1-Sec)……….20 NNE @ 10:50 P.M.
VECTOR #2 (1-Sec)……….21 N @ 06:28 A.M.
DAVIS #1……………….18 NE @ 10:50 P.M.
DAVIS #2 ………………17 NNE @ 12:13 A.M.
RMY #1 (Instantaneous)…..19 NNE @ 10:50 P.M.
RMY #2 (Instantaneous)…..20 N @ 06:28 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……19 @ 12:05 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 N @ 12:23 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 12:05 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 01:18 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 N @ 12:06 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 NE @ 02:37 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 N @ 12:11 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 NNE @ 01:18 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14 @ 12:06 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.5 N [204 total miles]
VECTOR #1………………9.1
VECTOR #2………………9.4
DAVIS #1……………….9.1 NE
DAVIS #2……………….8.7 NE
RMY #1…………………8.9 NNE
RMY #2…………………9.3 NNE
RICHARDS (C5C)………….9.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE YEAR…………..47.22 DEPARTURE…..+8.38
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 73/52/63/-6/0.00/774/98 23 SSW VEC1 22 SSW RMY 21
9/2 79/56/68/-1/0.00/708/90 25 SW VEC1 24 SW RMY 26
9/3 85/61/73/+5/T/674/86 21 SW VEC1 21 SW RMY 21
9/4 85/68/77/+9/0.00/719/92 17 NW VEC1 16 NW RMY 16
9/5 86/68/77/+9/0.00/647/83 16 NNE VEC1 16 ENE RMY 16
9/6 89/70/80/+12/0.00/722/93 17 WSW VEC1 17 SSW RMY 18
9/7 92/72/82/+15/0.00/726/94 20 SSW VEC1 21 SSW RMY 21
9/8 86/70/78/+11/0.00/293/38 30 SSW VEC1 31 SSW RMY 32 TSTM
9/9 86/68/77/+10/0.49/291/38 30 S VEC1 31 S RMY 29 TSTM
9/10 78/67/73/+7/0.25/008/01 17 NE VEC1 17 NE RMY 15 TSTM
9/11 74/67/71/+5/0.64/023/03 15 E VEC1 15 E RMY 14 TSTM
9/12 79/65/72/+6/T/250/33 18 E VEC1 17 E RMY 18
9/13 76/64/70/+5/1.92/242/32 35 SSW VEC1 35 SSW RMY 36 TSTM
9/14 75/57/66/+1/0.00/670/89 24 NW VEC1 24 NW RMY 24
9/15 66/53/60/-5/0.00/465/62 36 N VEC1 35 N RMY 35
9/16 68/54/61/-3/0.21/022/03 44 WNW VEC1 44 WNW RMY 47
9/17 76/53/65/+1/0.00/685/92 26 WNW VEC1 25 WNW RMY 24
9/18 64/60/62/-1/1.56/000/00 33 WNW VEC1 33 WNW RMY 35 TSTM
9/19 70/56/63/0/0.00/665/90 35 WNW VEC1 37 WNW RMY 36
9/20 72/53/63/0/0.00/714/97 21 WNW VEC1 21 WNW RMY 22
9/21 71/52/62/0/0.00/661/90 17 NNW VEC1 17 NNW RMY 17
9/22 68/54/61/-1/0.00/570/78 23 E VEC1 21 E RMY 22
9/23 58/54/56/-6/0.24/000/00 30 NE VEC1 30 NE RMY 27
9/24 60/56/58/-3/0.73/000/00 30 ENE VEC1 30 ENE RMY 29
9/25 60/55/58/-3/0.13/000/00 38 ENE VEC1 40 ENE RMY 41
9/26 57/47/52/-8/T/216/30 36 NE VEC1 37 NE RMY 39
9/27 63/46/55/-5/0.00/652/91 18 ENE VEC1 18 E RMY 18
9/28 65/50/58/-1/0.00/520/73 18 E VEC1 18 E RMY 19
9/29 57/52/55/-4/0.46/000/00 28 NNE VEC1 25 NNE RMY 26
9/30 58/52/55/-4/0.14/000/00 23 N VEC1 23 NE RMY 25
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SEPTEMBER DAILY RECORDS
09/07/2023: NEW RECORD HIGH DAILY MINIMUM TEMPERATURE OF 72F;
BEATS THE RECORD OF 70F SET IN 1999
09/07/2023: RECORD HIGH TEMPERATURE OF 92F;
TIES THE RECORD OF 92F SET IN 2007 AND 2015
09/08/2023: RECORD HIGH DAILY MINIMUM TEMPERATURE OF 70F;
TIES THE RECORD OF 70F SET IN 2015
————————————————————–
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/…/.. 20 NNE VEC1 20 NNE RMY 19
10/2 The low since midnight is 57F, the daily normal low is 49F
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 2
HIGH 85F IN 1968
LOW 29F IN 1899
PRECIP 1.75 INCHES IN 1984
PEAK GUST 53 MPH ENE IN 2022
RECORDS FOR OCTOBER 3
HIGH 82F IN 1922
LOW 28F IN 1899
PRECIP 1.76 INCHES IN 1979
PEAK GUST 62 MPH WNW IN 1964
TODAY’S REPORT PREPARED BY: Matt Douglas
