Tuesday, October 1, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, OCTOBER 1, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0542E
SUNSET: 1725E
STARTING OCTOBER ON A CLOUDY, COOL, BUT DRY NOTE….
Clouds are dominating the sky today with a cooling onshore flow
keeping temperatures a bit below normal in terms of daytime
readings. Temperatures have warmed into the mid 60s.
The wind has been a bit gusty out of generally an easterly
direction as high pressure tries to build a bit to our northeast.
The average speed for the day so far is around 9mph. The peak gust
for the day so far is 28mph, which occurred just before the 1pm
observation.
Visibility was quite limited early this morning as the summit was
in the clouds. The view at that time was under 1/4 mile. However
marked improvement has been seen since the fog lifted, with the
view reaching 30 miles for the balance of the day so far.
The maximum temperature so far today is 66F, which is 1 degree
below the normal high of 67F. The minimum temperature since
midnight is 56F, which is 6 degrees above the normal low of 50F.
————————————————————–
PRELIMINARY STATS FOR SEPTEMBER 2024
TEMPERATURE, Deg. F
Avg. Max. 73.5 [+0.8]
Avg. Min. 56.2 [+0.6]
Mean 64.9 [+0.7]
24-hour corrected mean: 63.8
Max. for month: 85F on the 13th
Min. for month: 49F on the 3rd
HEATING DEGREE DAYS
Total heating units: 59 [-041]
Total for the season: 70 [-048]
Total for last season: 99
COOLING DEGREE DAYS
Total cooling units: 63 [-011]
Total for the season: 757 [+087]
Total for last season: 689
PRECIPITATION, Inches
Total: 1.83 [-2.23]
Greatest in 24 hrs: 1.13 on the 21st
SNOWFALL, Inches
Total: 0.0 [ 0.0]
Greatest in 24 hrs: 0.0 on the N/A
WIND, mph
Avg. uncorrected wind speed: 8.7 mph
Avg. corrected wind speed: 9.4 mph
Prevailing wind direction: Northeast [12%]
Peak gust and direction: 38 NE on the 20th
SUNSHINE:
Campbell-Stokes card minutes: 11982 of a possible 21582, or 56%
Astronomical total minutes: 12342 of a possible 22400, or 56%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratus fractus, overcast stratus, few breaks in
overcast SE-WSW, higher clouds visible SE-WSW
Temperature: 58F; Dew Point: 58F; Relative Humidity: 100%
Wind: ENE @ 7G14 kts
Sea-level pressure: 1020.7 mb; 30.14 in. Hg: rising unsteadily
Visibility: 4 miles, 1 mile N-NE, 10 miles S-WSW, fog
6-hr Max temp: 58F
6-hr Min temp: 56F
24-hr Precip: 0.00 inches
BHO SA 1155 -X E2 BKN 12 OVC 4F 207/58/58/0607G14/014/ FEW BINOVC SE-WSW
HIER CLDS VSBL SE-WSW VSBY 1 N-NE 10 S-WSW/ 8/6// 52007 10058 20056
10 A.M.
Weather: Overcast stratocumulus
Temperature: 61F; Dew Point: 57F; Relative Humidity: 87%
Wind: E @ 8G16 kts
Sea-level pressure: 1021.5 mb; 30.16 in. Hg: rising, then more slowly
Visibility: 30 miles, thin fog
3-hr Precip: 0.00 inches
BHO SA 1455 E15 OVC 30 215/61/57/0808G16/016/ THN F ALQDS/ 8/5// 51005
1 P.M.
Weather: Broken stratocumulus, broken cumulus, broken cirrus
Temperature: 65F; Dew Point: 57F; Relative Humidity: 75%
Wind: ENE @ 14G21 kts
Sea-level pressure: 1020.3 mb; 30.13 in. Hg: steady, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 66F
6-hr Min temp: 58F
6-hr Precip: 0.00 inches
BHO SA 1755 E13 BKN 22 BKN 250 BKN 30 203/65/57/0714G21/013/ HAZY/
8/801 58012 10066 20058
————————————————————–
SUMMARY FOR MONDAY, SEPTEMBER 30, 2024
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..67
MIN…….54 NORMAL…..50
MEAN……63 NORMAL…..59
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….+28 [+0.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….2 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH……………59 DEPARTURE…….-41
TOTAL HEATING UNITS FOR THE SEASON…………..70 DEPARTURE…….-48
TOTAL HEATING UNITS LAST SEASON TO DATE………99 DEPARTURE…….-29
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………63 DEPARTURE…….-11
TOTAL COOLING UNITS FOR THE SEASON………….757 DEPARTURE…….+87
TOTAL COOLING UNITS LAST SEASON TO DATE……..689 DEPARTURE…….+68
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)……….E17 ENE @ 01:14 P.M.
VECTOR #1 (1-Sec)……….16 ENE @ 11:58 A.M.
VECTOR #2 (1-Sec)……….18 NE @ 11:58 A.M.
DAVIS #1……………….17 ENE @ 11:57 A.M.
DAVIS #2 ………………19 E @ 11:58 A.M.
RMY #1 (Instantaneous)…..17 ENE @ 12:00 P.M.
RMY #2 (Instantaneous)…..18 NE @ 11:58 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………11 ENE @ 11:59 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 11:58 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 11:59 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 ENE @ 11:58 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 ENE @ 11:59 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 ENE @ 11:58 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 ENE @ 11:59 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..5.3 ENE [126 total miles]
VECTOR #1………………5.8
VECTOR #2………………6.0
DAVIS #1……………….5.7 E
DAVIS #2……………….5.6 E
RMY #1…………………5.8 ENE
RMY #2…………………6.0 ENE
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…………..1.83 DEPARTURE…..-2.23
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.04 DEPARTURE…..+4.37
————————————————————–
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 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/737/95 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/240/31 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/301/39 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/753/98 35 W VEC1 35 W RMY 34
9/9 75/51/63/-4/0.00/727/95 31 WNW VEC1 28 WNW RMY 30
9/10 78/56/67/+1/0.00/717/94 21 NW VEC1 20 SW RMY 21
9/11 78/53/66/0/0.00/714/94 20 S VEC1 19 S RMY 18
9/12 82/58/70/+4/0.00/711/94 20 S VEC1 19 S RMY 20
9/13 85/59/72/+7/0.00/595/79 21 SSW VEC1 20 SSW RMY 20
9/14 81/61/71/+6/0.00/691/92 21 ENE VEC1 20 ENE RMY 21
9/15 78/60/69/+4/0.00/598/80 23 SE VEC1 23 SE RMY 25
9/16 83/55/69/+5/0.00/700/94 22 SSW VEC1 21 SSW RMY 21
9/17 83/55/69/+5/0.00/453/61 16 SW VEC1 14 S RMY 15
9/18 77/60/69/+6/0.00/163/22 15 W VEC1 14 W RMY 14
9/19 69/60/65/+2/0.10/000/00 30 NE VEC1 30 NE RMY 31
9/20 64/58/61/-2/0.12/000/00 38 NE VEC1 38 NE RMY 40
9/21 58/55/57/-5/1.13/000/00 35 NNE VEC1 31 NNE RMY 31
9/22 63/54/59/-3/0.01/190/26 35 NE VEC1 31 NE RMY 34
9/23 62/52/57/-5/T/058/08 28 ENE VEC1 27 NE RMY 27
9/24 61/51/56/-5/0.01/087/12 25 ENE VEC1 22 ENE RMY 24
9/25 65/56/61/0/0.00/029/04 18 E VEC1 18 ESE RMY 18
9/26 67/56/62/+2/0.42/000/00 26 S VEC1 26 S RMY 29
9/27 77/60/69/+9/0.00/450/63 17 W VEC1 17 W RMY 15
9/28 72/57/65/+6/0.00/441/62 20 E VEC1 20 E RMY 21
9/29 64/55/60/+1/0.00/014/02 16 ENE VEC1 15 NE RMY 15
9/30 71/54/63/+4/0.00/677/96 17 ENE VEC1 16 ENE RMY 17
10/1 The low since midnight is 56F, the daily normal low is 50F.
————————————————————–
SEPTEMBER DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977
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
TODAY’S REPORT PREPARED BY: Matt Douglas
