Monday, October 4, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, OCTOBER 4, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0545E
SUNSET: 1720E
COOL AND WET TO START THE NEW WORK HERE AT BLUE HILL….
Clouds have been socked in since yesterday along with periods of
rain and gusty winds off the ocean. Rainfall has amounted to a
total of 0.94″, 0.79″ of which was measured upto 7 A.M. this
morning, and another 0.15″ between 7 A.M. and 1 P.M.
Adding to the wet conditions, temperatures settled into the
mid-upper 50s overnight and haven’t moved from those values.
A gusty east wind just adds to the chill. Speeds have been
averaging between 10-15mph with gusts over 20mph. A peak gust
of 30mph has occurred so far.
The high so far today is 58F, a 8 degrees below the normal
max of 66F. The low since midnight is 54F, 5 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: Overcast stratus/stratus fractus, light rain
Temperature: 54F; Dew Point: 54F; Relative Humidity: 100%
Wind: E @ 14G25 kts
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: rising, then falling
Visibility: 3 miles, fog
6-hr Max temp: 58F
6-hr Min temp: 54F
24-hr Precip: 0.79 ins.
BHO SA 1155 E3 OVC 3R-F 178/54/54/0814G25/006/ STFRA OCNLY DRFTG OVR SMT/
8/6// 50008 6068/ 70079 10058 20054
10 A.M.
Weather: Overcast stratus, few lower stratus fractus all quadrants
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: E @ 12G18 kts
Sea-level pressure: 1019.5 mb; 30.11 in Hg; rising, then more slowly
Visibility: 8 miles, thin fog
3-hr Precip: 0.14 ins.
BHO SA 1455 E12 OVC 8 195/55/55/0812G18/011/ FEW LWR STFRA ALQDS THN F ALQDS
R-E15/ 8/6// 51017 6014/
1 P.M.
Weather: Overcast stratus, light drizzle
Temperature: 55F, Dew point: 54F; Relative Humidity: 97%
Wind: E @ 14G19 kts
Sea-level pressure: 1019.9 mb; 30.12 in Hg; rising, then falling
Visibility: 3 miles, fog
6-hr Max temp: 57F
6-hr Min temp: 54F
6-hr Precip: 0.15 ins.
BHO SA 1755 E15 OVC 3L-F 199/55/54/0914G19/012/ 8/6// 50004 6015/ 10057 20054
SUMMARY FOR SUNDAY, OCTOBER 3, 2021
TEMPERATURE (DEGREES F)
MAX…….65 NORMAL…..66
MIN…….55 NORMAL…..49
MEAN……60 NORMAL…..57
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………. +3
TOTAL DEPARTURE FOR THE MONTH……………………. +1 [+0.1 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……………21 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………..95 DEPARTURE…….-46
TOTAL HEATING UNITS LAST SEASON TO DATE……..117 DEPARTURE…….-22
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……..-2
TOTAL COOLING UNITS FOR THE SEASON………….712 DEPARTURE…….+40
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-119
PEAK WIND GUST (MPH):
Official……………….19 E @ 11:01 P.M.
AEROVANE (south tower)…..19 E @ 11:11 P.M.
VECTOR #2 (south tower)….21 @ 11:01 P.M.
DAVIS #2 (south tower)…..19 ENE @ 11:01 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………………13 E @ 11:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 11:15 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 ENE @ 11:07 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…….. 7.4 NE [178 total miles]
VECTOR #2……………… 8.3
DAVIS #2………………. 8.2 ENE
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…….0.79 DEPARTURE….+0.63
TOTAL PRECIPITATION FOR THE MONTH………….0.79 DEPARTURE….+0.29
TOTAL PRECIPITATION FOR THE YEAR………….47.77 DEPARTURE….+8.86
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 71/55/63/0/0.00/647/88 20 SE AERO 20 SE RMY N/A
09/21 75/55/65/+3/0.00/490/67 19 SSE AERO 20 SSE RMY N/A
09/22 75/65/70/+8/0.02/153/21 30 S AERO 30 S RMY N/A
09/23 78/65/72/+10/0.08/298/41 36 SSE AERO 37 SSE RMY N/A
09/24 75/62/69/+8/0.02/007/01 43 SSE AERO 45 SSE RMY N/A
09/25 74/59/67/+6/0.02/303/42 14 N AERO 14 NNW RMY N/A
09/26 73/54/64/+4/0.57/510/71 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/-6/0.01/…/.. 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/-4/0.00/…/.. 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 The low since midnight is 54F, 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 4
HIGH 84F IN 2007
LOW 28F IN 1888
PRECIP 1.87 INCHES IN 2011
PEAK GUST 59 MPH SSW IN 1990
RECORDS FOR OCTOBER 5
HIGH 86F IN 2007
LOW 29F IN 1965
PRECIP 3.17 INCHES IN 1962
PEAK GUST 64e MPH S IN 1979
TODAY’S REPORT PREPARED BY: Matt Douglas
