Friday, October 15, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, OCTOBER 15, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0557E
SUNSET: 1702E
UNSEASONABLE WARMTH CONTINUES….
Today featured another above average day in the temp department.
The high so far peaking in the low-70s. Looking at the other end
of things, the overnight low barely broke the 60F mark dipping to
just 59F which is actually a mere 2F lower than the normal daily
high! We can thank analogously moist dew points in the mid to
upper-50s of late. In fact, the wind this afternoon is veering to
the southwest now helping to usher in DPs into the low-60s! Once
we do finally experience normal dew points and air temperatures,
it will feel especially chilly!
While the previous 2 days contained clear, sunny skies, clouds
have been introduced into the picture today. The cloud deck has
been predominantly high and thin for the better portion of the day,
so a good percentage of solar insolation is making its way to the
surface helping to fuel those temps.
Visibility has been the weak point here averaging about 35 miles.
Winds are noticeably light, however, with a mean thus far of 6 MPH.
The high so far today is 74F, 13F degrees above the normal max of
61F. The low since midnight is 59F, 15 degrees above the normal
low of 44F.
Today’s Observations:
7 A.M.
Weather: Scattered Altocumulus & Altostratus (few cirrus,
patches of ground fog below summit)
Temperature: 61F; Dew Point: 58F; Relative Humidity: 89%
Wind: SE @ 5 kts (wind light)
Sea-level pressure: 1014.1 mb; 29.95 in. Hg: steady, then rising
Visibility: 25 miles, thin fog
6-hr Max temp: 61F
6-hr Min temp: 59F
24-hr Precip: 0.00 ins.
BHO SA 1155 70 SCT 25 141/61/58/1305/995/ FEW CI PTCHS GF BLO SMT
THN F ALQDS WND LGT/ 8/031 53006 10061 20059
10 A.M.
Weather: Scattered Altocumulus & Altostratus (few cumulus)
Temperature: 69F; Dew Point: 60F; Relative Humidity: 72%
Wind: SSE @ 4 kts (wind light)
Sea-level pressure: 1014.4 mb; 29.96 in Hg; rising steadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 85 SCT 30 144/69/60/1504/996/ FEW CU ALQDS HAZY WND LGT/
8/130 52003
1 P.M.
Weather: Broken Cumulus, Broken Altocumulus & Altostratus, Broken Cirrus
Temperature: 72F, Dew point: 62F; Relative Humidity: 71%
Wind: SSE @ 4 kts (wind light)
Sea-level pressure: 1012.8 mb; 29.91 in Hg; falling unsteadily
Visibility: 45 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 61F
6-hr Precip: 0.00 ins.
BHO SA 1755 25 BKN 100 BKN 250 -BKN 45 128/72/62/2004G10/991/
HAZY WND LGT/ 8/131 57016 10074 20061
SUMMARY FOR THURSDAY, OCTOBER 14, 2021
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..62
MIN…….56 NORMAL…..45
MEAN……65 NORMAL…..53
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+12
TOTAL DEPARTURE FOR THE MONTH……………………..+61 [+4.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE MONTH……………70 DEPARTURE…….-67
TOTAL HEATING UNITS FOR THE SEASON………….144 DEPARTURE……-110
TOTAL HEATING UNITS LAST SEASON TO DATE……..217 DEPARTURE…….-73
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE SEASON………….714 DEPARTURE…….+38
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-117
PEAK WIND GUST (MPH):
Official……………….19 N @ 7:18 A.M.
AEROVANE (south tower)…..20 N @ 7:08 A.M.
VECTOR #2 (south tower)….20 @ 6:28 A.M.
DAVIS #2 (south tower)…..18 N @ 7:06 A.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………………14 N @ 7:11 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 7:08 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 N @ 7:08 A.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…….. 6.7 NE [161 total miles]
VECTOR #2……………… 7.6
DAVIS #2………………. 7.2 NNE
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………….2.10 DEPARTURE….-0.27
TOTAL PRECIPITATION FOR THE YEAR………….49.08 DEPARTURE….+8.30
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/-4/0.00/…/.. 20 WNW AERO 20 WNW RMY N/A
10/02 73/47/60/+2/0.00/…/.. 24 WSW AERO 23 WSW RMY N/A
10/03 65/55/60/+3/0.09/…/.. 19 E AERO 19 E RMY N/A
10/04 59/51/55/-2/1.69/…/.. 30 E AERO 30 E RMY N/A
10/05 58/50/54/-3/0.30/…/.. 22 NNE AERO 23 NE RMY N/A
10/06 69/50/60/+4/0.00/…/.. 15 N AERO 16 N RMY N/A
10/07 73/55/64/+8/0.00/…/.. 15 WSW AERO 15 W RMY N/A
10/08 69/55/62/+7/T/…/.. 24 ENE AERO 23 ENE RMY N/A
10/09 62/54/58/+3/0.01/…/.. 23 E AERO 23 E RMY N/A
10/10 62/54/58/+3/T/…/.. 22 E AERO 21 E RMY N/A
10/11 67/56/62/+8/0.01/…/.. 20 NE AERO 21 NE RMY N/A
10/12 72/54/63/+9/0.00/…/.. 15 SW AERO 15 SW RMY N/A
10/13 75/55/65/+11/0.00/…/.. 18 SW AERO 18 SW RMY N/A
10/14 73/56/65/+12/0.00/…/.. 19 N AERO 20 N RMY N/A
10/15 The low since midnight is 59F, the daily normal low is 44F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003
RECORDS FOR OCTOBER 16
HIGH 86F IN 1897
LOW 28F IN 1886
PRECIP 2.82 INCHES IN 1974
SNOWFALL TRACE IN 2009
PEAK GUST 68e MPH SSE IN 1954 (HURRICANE HAZEL)
TODAY’S REPORT PREPARED BY: Andrew Swanson
