Saturday, October 2, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, OCTOBER 2ND, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0543E
SUNSET: 1724E
WARMER AND BREEZY WITH PARTLY CLOUDY SKIES….
We observed partly cloudy skies for the majority of the
day and a visibility of 65 miles. The temperature climbed
20 degrees in a 6-hour period, from 50F at 7AM to 70F at
the 1 P.M. observation. Pressure dropped almost 4 millibars,
and humidity is holding around 60%.
Wind is southwesterly at an average of 10 mph, and a peak
gust so far of 21 mph.
The high so far today is 70F, 4 degrees above the normal
max of 66F. The low since midnight is 47F, 2 degrees below
the normal low of 49F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 51F; Dew Point: 44F; Relative Humidity: 76%
Wind: W @ 10G17 kts
Sea-level pressure: 1021.0 mb; 30.15 in. Hg: rising, rising unsteadily
Visibility: 65 miles
6-hr Max temp: 51F
6-hr Min temp: 47F
24-hr Precip: 0.00 ins.
BHO SA 1155 70 SCT 250 BKN 65 210/51/44/2710G17/015/ 8/054 52002
10051 20047
10 A.M.
Weather: Scattered altocumulus and cirrus
Temperature: 61F; Dew Point: 50F; Relative Humidity: 66%
Wind: W @ 9G14 kts
Sea-level pressure: 1019.6 mb; 30.11 in Hg; falling then more
rapidly
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 110 SCT 250 SCT 65 196/61/50/2709G14/011/ 8/051 58014
1 P.M.
Weather: Scattered altocumulus and cirrus
Temperature: 70F, Dew point: 53F; Relative Humidity: 55%
Wind: SW @ 10G19 kts
Sea-level pressure: 1017.4 mb; 30.04 in Hg; falling, then more
rapidly
Visibility: 60 miles
6-hr Max temp: 70F
6-hr Min temp: 50F
6-hr Precip: 0.00 ins.
BHO SA 1755 70 SCT 250 SCT 60 174/70/53/2210G19/004/ 8/051 58022
10070 20050
SUMMARY FOR FRIDAY, OCTOBER 1, 2021
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..67
MIN…….44 NORMAL…..50
MEAN……54 NORMAL…..58
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………. -4
TOTAL DEPARTURE FOR THE MONTH……………………. -4 [-4.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………11 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH……………11 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE SEASON…………..85 DEPARTURE…….-40
TOTAL HEATING UNITS LAST SEASON TO DATE………98 DEPARTURE…….-13
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…….+41
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-119
PEAK WIND GUST (MPH):
Official……………….20 WNW @ 1:16 P.M.
AEROVANE (south tower)…..20 WNW @ 11:52 A.M.
VECTOR #2 (south tower)….21 @ 1:16 P.M.
DAVIS #2 (south tower)…..18 WNW @ 11:10 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 WNW @ 1:16 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 3:11 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 WNW @ 1:18 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……..8.8 WNW [210 total miles]
VECTOR #2………………9.7
DAVIS #2……………….9.5 NW
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….-0.17
TOTAL PRECIPITATION FOR THE YEAR………….46.98 DEPARTURE….+8.40
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 The low since midnight is 47F, 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 2
HIGH 85F IN 1968
LOW 29F IN 1899
PRECIP 1.75 INCHES IN 1984
PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984
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: Benjamin Turner
