Sunday, October 10, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, OCTOBER 10, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0551E
SUNSET: 1709E
SEASONAL WITH LIMITED VISIBILITY AND OVERCAST SKIES….
Today was on the cooler side, staying in the low 60’s with a
cool easterly breeze. Wind is around 10 mph on average with a
max gust around 20 mph.
Visibility was limited to 30 miles at most due to hazy conditions.
Dew points stayed in the mid 50’s, and humidity stayed above 70%
for the majority of the day.
The high so far today is 62F, a degree below the normal max of
63F. The low since midnight is 55F, 9 degrees above the normal
low of 46F.
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 [-44]
Total for last season: 98
COOLING DEGREE DAYS
Total cooling units: 62 [-12]
Total for the season: 714 [+44]
Total for last season: 830
PRECIPITATION, Inches
Total: 6.64 [+2.58]
Greatest in 24 hrs: 4.00 inches on the 1st/2nd
WIND, mph
Avg. uncorrected wind speed: 10.5 mph
Avg. corrected wind speed: 11.0 mph
Prevailing wind direction: NW [11%]
Peak gust and direction: 49 ENE on the 2nd
SUNSHINE:
Campbell-Stokes card minutes: 11490 of a possible 21582, or 53%
Astronomical total minutes: 11965 of a possible 22423, or 53%
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus and altostratus, break in
overcast to the NW, sun dimly visible
Temperature: 57F; Dew Point: 55F; Relative Humidity: 83%
Wind: E @ 11 kts
Sea-level pressure: 1026.6 mb; 30.32 in. Hg: falling then rising
Visibility: 20 miles, thin fog
6-hr Max temp: 57F
6-hr Min temp: 55F
24-hr Precip: 0.00 ins.
BHO SA 1155 30 BKN 180 OVC 20 266/57/55/0911/032/ THN F ALQDS BINOVC
NW SUN DMLY VSBL/ 8/810 50000 10057 20055
10 A.M.
Weather: Broken stratocumulus, overcast cirrostratus
Temperature: 60F; Dew Point: 55F; Relative Humidity: 83%
Wind: ESE @ 4 kts, light and variable
Sea-level pressure: 1026.5 mb; 30.31 in Hg; rising then
falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 40 BKN 220 OVC 30 265/60/55/1104/031/ HAZY WND L/V/
8/808 55001
1 P.M.
Weather: Broken stratocumulus and overcast altostratus
Temperature: 61F, Dew point: 53F; Relative Humidity: 76%
Wind: ESE @ 8 kts
Sea-level pressure: 1025.4 mb; 30.28 in Hg; falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 62F
6-hr Min temp: 57F
6-hr Precip: 0.00 ins.
BHO SA 1755 35 BKN 65 OVC 30 254/61/53/1108/028/ HAZY/ 8/87/ 58011
10062 20057
SUMMARY FOR SATURDAY, OCTOBER 9, 2021
TEMPERATURE (DEGREES F)
MAX…….62 NORMAL…..64
MIN…….54 NORMAL…..47
MEAN……58 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+3
TOTAL DEPARTURE FOR THE MONTH……………………..+18 [+1.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….7 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………58 DEPARTURE…….-22
TOTAL HEATING UNITS FOR THE SEASON………….132 DEPARTURE…….-66
TOTAL HEATING UNITS LAST SEASON TO DATE……..172 DEPARTURE…….-40
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……..-4
TOTAL COOLING UNITS FOR THE SEASON………….714 DEPARTURE…….+40
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-117
PEAK WIND GUST (MPH):
Official……………….23 E @ 12:37 P.M.
AEROVANE (south tower)…..23 E @ 8:38 A.M.
VECTOR #2 (south tower)….25 @ 11:31 A.M.
DAVIS #2 (south tower)…..24 E @ 8:37 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………………16 E @ 11:20 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 11:20 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 E @ 11:21 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……..11.2 E [268 total miles]
VECTOR #2………………11.6
DAVIS #2……………….11.8 ESE
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….-0.18
TOTAL PRECIPITATION FOR THE MONTH………….2.09 DEPARTURE….+0.58
TOTAL PRECIPITATION FOR THE YEAR………….49.07 DEPARTURE….+9.15
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/529/74 30 SW AERO 30 SW RMY N/A
09/28 67/52/60/+1/0.40/028/04 27 SSW AERO 25 SSW RMY N/A TSTM
09/29 63/45/54/-5/0.00/568/80 25 NNW AERO 25 NNW RMY N/A
09/30 60/46/53/-6/0.01/354/50 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 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/…./…/.. 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/+7/0.00/…/.. 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 The low since midnight is 54F, the daily normal low is 46F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958
RECORDS FOR OCTOBER 11
HIGH 80F IN 1919,1949
LOW 28F IN 1993
PRECIP 1.36 INCHES IN 2019
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941
TODAY’S REPORT PREPARED BY: Benjamin Turner
