Sunday, October 3, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, OCTOBER 3RD, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0544E
SUNSET: 1722E
MOSTLY CLOUDY WITH LIMITED VISIBILITY….
We observed mostly cloudy skies for the majority of the
day. Visibility went from a 1/2 mile in fog this morning to
45 miles this afternoon.
Wind is easterly and light at an average of 5 mph, and a peak
gust so far of 14 mph.
Last month ended off a degree above average with a rain surplus
of 2.58 inches.
The high so far today is 65F, a degree below the normal
max of 66F. The low since midnight is 55F, 6 degrees above
the normal low of 49F.
PRELIMINARY STATS FOR SEPTEMBER 2021
TEMPERATURE, Deg. F
Avg. Max. 73.2 [+0.5]
Avg. Min. 57.4 [+1.8]
Mean 65.3 [+1.1]
24-hour corrected mean: 64.8
Max. for month: 82F on the 15th
Min. for month: 45F on the 29th
HEATING DEGREE DAYS
Total heating units: 46 [-54]
Total for the season: 74 [+25]
Total for last season: 98
COOLING DEGREE DAYS
Total cooling units: 62 [-12]
Total for the season: 712 [+42]
Total for last season: 830
PRECIPITATION, Inches
Total: 6.64 [+2.58]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 10.5 mph
Avg. corrected wind speed: 10.7 mph
Prevailing wind direction: NW [11%]
Peak gust and direction: 43 ENE on the 2nd
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A
Today’s Observations:
7 A.M.
Weather: Fog, 300 feet vertical visibility
Temperature: 58F; Dew Point: 58F; Relative Humidity: 100%
Wind: ENE @ 7 kts
Sea-level pressure: 1015.6 mb; 29.99 in. Hg: rising, rising then
falling
Visibility: 1/2 mile, fog
6-hr Max temp: 59F
6-hr Min temp: 55F
24-hr Precip: 0.00 ins.
BHO SA 1155 X W3 1/2F 156/58/58/0707/999/ 8//// 55001 10059 20055
10 A.M.
Weather: Overcast stratus
Temperature: 61F; Dew Point: 59F; Relative Humidity: 94%
Wind: ENE @ 4 kts, light and variable
Sea-level pressure: 1016.2 mb; 30.01 in Hg; rising then more
slowly
Visibility: 30 miles, thin fog
3-hr Precip: 0.00 ins.
BHO SA 1455 10 OVC 30 162/61/59/0604/001/ THN F ALQDS WND L/V/
8/6// 51006
1 P.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 65F, Dew point: 59F; Relative Humidity: 81%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1014.7 mb; 29.96 in Hg; steady then falling
Visibility: 45 miles
6-hr Max temp: 65F
6-hr Min temp: 57F
6-hr Precip: 0.00 ins.
BHO SA 1755 20 SCT 100 BKN 45 147/65/59/1105/996/ WND LGT/ 8/870
58015 10065 20057
SUMMARY FOR SATURDAY, OCTOBER 2, 2021
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..66
MIN…….47 NORMAL…..49
MEAN……60 NORMAL…..58
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………. +2
TOTAL DEPARTURE FOR THE MONTH……………………. -2 [-1.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….5 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………16 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE SEASON…………..90 DEPARTURE…….-43
TOTAL HEATING UNITS LAST SEASON TO DATE……..107 DEPARTURE…….-17
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….712 DEPARTURE…….+40
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-119
PEAK WIND GUST (MPH):
Official……………….24 WSW @ 2:03 P.M.
AEROVANE (south tower)…..23 WSW @ 2:15 P.M.
VECTOR #2 (south tower)….25 @ 12:53 P.M.
DAVIS #2 (south tower)…..24 WSW @ 2:03 P.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY…………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 WSW @ 2:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 2:04 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 WSW @ 2:04 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.8 WSW [260 total miles]
VECTOR #2………………11.7
DAVIS #2……………….11.8 WSW
RMY……………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS
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….-0.34
TOTAL PRECIPITATION FOR THE YEAR………….46.98 DEPARTURE….+8.23
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
09/01 68/56/62/-7/1.47/000/00 34 NNE AERO 37 NNE RMY N/A
09/02 71/55/63/-6/2.53/322/41 49 ENE AERO 52 ENE RMY N/A
09/03 72/52/62/-6/0.00/735/94 23 NW AERO 23 NW RMY N/A
09/04 76/55/66/-2/0.00/757/97 22 WNW AERO 21 WNW RMY N/A
09/05 72/60/66/-2/0.04/008/01 27 S AERO 29 S RMY N/A
09/06 80/61/71/+3/0.00/557/72 24 WNW AERO 25 WNW RMY N/A
09/07 78/57/68/+1/0.00/732/95 23 WSW AERO 22 WSW RMY N/A
09/08 81/61/71/+4/0.00/646/84 43 S AERO 45 S RMY N/A
09/09 71/64/68/+1/0.90/000/00 33 S AERO 36 S RMY N/A
09/10 74/55/65/-1/0.04/595/78 31 NW AERO 32 WNW RMY N/A
09/11 75/51/63/-3/0.00/730/96 24 SW AERO 24 SW RMY N/A
09/12 79/60/70/+4/0.00/591/78 33 SW AERO 32 SW RMY N/A
09/13 77/62/70/+5/0.06/559/74 22 NW AERO 23 NW RMY N/A
09/14 75/59/67/+2/0.00/444/59 23 S AERO 25 S RMY N/A
09/15 82/65/74/+9/T/539/72 32 SSW AERO 35 SSW RMY N/A
09/16 69/61/65/+1/0.27/037/05 24 ENE AERO 24 ENE RMY N/A TSTM
09/17 66/60/63/-1/0.02/000/00 22 NE AERO 23 NE RMY N/A
09/18 74/62/68/+5/0.04/207/28 17 WNW AERO 18 WNW RMY N/A TSTM
09/19 71/57/64/+1/0.15/619/84 23 NNE AERO 24 NNE RMY N/A
09/20 71/55/63/0/0.00/588/80 20 SE AERO 20 SE RMY N/A
09/21 75/55/65/+3/0.00/…/.. 19 SSE AERO 20 SSE RMY N/A
09/22 75/65/70/+8/0.02/…/.. 30 S AERO 30 S RMY N/A
09/23 78/65/72/+10/0.08/…/.. 36 SSE AERO 37 SSE RMY N/A
09/24 75/62/69/+8/0.02/…/.. 43 SSE AERO 45 SSE RMY N/A
09/25 74/59/67/+6/0.02/…/.. 14 N AERO 14 NNW RMY N/A
09/26 73/54/64/+4/0.57/…/.. 33 WNW AERO 32 WNW RMY N/A
09/27 73/52/63/+3/T/…/.. 30 SW AERO 30 SW RMY N/A
09/28 67/52/60/+1/0.40/…/.. 27 SSW AERO 25 SSW RMY N/A TSTM
09/29 63/45/54/-5/0.00/…/.. 25 NNW AERO 25 NNW RMY N/A
09/30 60/46/53/-6/…/…/.. 22 NNW AERO 21 NNW RMY N/A
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
10/01 64/44/54/-4/…./…/.. 20 WNW AERO 20 WNW RMY N/A
10/02 73/47/60/+2/…./…/.. 24 WSW AERO 23 WSW RMY N/A
10/03 The low since midnight is 55F, the daily normal low is 49F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR OCTOBER 4
HIGH 84F IN 2007
LOW 28F IN 1888
PRECIP 1.87 INCHES IN 2011
PEAK GUST 59 MPH SSW IN 1990
TODAY’S REPORT PREPARED BY: Benjamin Turner
