Friday, September 3, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, SEPTEMBER 3, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0510E
SUNSET: 1815E
EXCELLENT VISIBILITY WITH PARTLY CLOUDY SKIES ATOP
GREAT BLUE HILL….
Today featured some pristine weather. Fall seems to be arriving
right on time, which is fortunate.
Skies were partly cloudy, and the humidity issues of late August are
but a distant memory.
Visibility was an excellent 80 miles all day, that’s a little better
than typical for a mid-fall day.
Wind is north westerly at an average of 10 mph with a max gust so far of
23 mph.
The high so far today is 71F, this is 6 degrees below the daily
normal maximum of 77F. The low so far today is 52F, which is 8
degrees below the daily normal minimum of 60F.
PRELIMINARY STATS FOR AUGUST 2021
TEMPERATURE, Deg. F
Avg. Max. 81.6 [+1.4]
Avg. Min. 65.4 [+2.8]
Mean 73.5 [+2.1]
24-hour corrected mean: 72.6
Max. for month: 92F on the 13th
Min. for month: 58F on the 1st
HEATING DEGREE DAYS
Total heating units: 0 [-11]
Total for the season: 28 [+25]
Total for last season: 3
COOLING DEGREE DAYS
Total cooling units: 271 [+62]
Total for the season: 650 [+54]
Total for last season: 757
PRECIPITATION, Inches
Total: 5.37 [+1.46]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 8.8 mph
Avg. corrected wind speed: 9.5 mph
Prevailing wind direction: SSW [14%]
Peak gust and direction: 47 ESE on the 22nd
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus
Temperature: 55F; Dew Point: 52F; Relative Humidity: 89%
Wind: NW @ 10G16 kts
Sea-level pressure: 1015.2 mb; 29.98 in. Hg; falling then rising
Visibility: 80 miles
6-hr Max temp: 55F
6-hr Min temp: 52F
24-hr Precip: Trace
BHO SA 1155 CLR 80 152/55/52/3110G16/998/ FEW AC/AS ALQDS/ 8/070
70000 53008 10055 20052
10 A.M.
Weather: Scattered altocumulus, few cumulus
Temperature: 65F; Dew Point: 53F; Relative Humidity: 65%
Wind: NNW @ 10G15
Sea-level pressure: 1015.3 mb; 29.98 in Hg; rising, then steady
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 70 SCT 80 153/65/53/3410G15/998/ FEW CU ALQDS/ 8/150
51001
1 P.M.
Weather: Scattered cumulus
Temperature: 67F, Dew point: 53F; Relative Humidity: 60%
Wind: NW @ 8G15 kts
Sea-level pressure: 1014.4 mb; 29.95 in Hg; falling steadily
Visibility: 80 miles
6-hr Max temp: 71F
6-hr Min temp: 55F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 80 144/67/53/3208G15/995/ 8/100 57009 10071
20055
SUMMARY FOR THURSDAY, SEPTEMBER 2, 2021
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..77
MIN…….55 NORMAL…..60
MEAN……63 NORMAL…..69
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………-6
TOTAL DEPARTURE FOR THE MONTH……………………-13 [-6.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….2 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………….5 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE SEASON…………..33 DEPARTURE…….+13
TOTAL HEATING UNITS LAST SEASON TO DATE……….4 DEPARTURE…….+29
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-9
TOTAL COOLING UNITS FOR THE SEASON………….650 DEPARTURE…….+45
TOTAL COOLING UNITS LAST SEASON TO DATE……..760 DEPARTURE……-110
PEAK WIND GUST (MPH):
Official……………….49 ENE @ 1:31 A.M.
AEROVANE (south tower)…..52 ENE @ 1:33 A.M.
VECTOR #2 (south tower)….55 @ 1:31 A.M.
DAVIS #2 (south tower)…..47 E @ 1:09 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………………33 ENE @ 1:31 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 @ 1:12 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 E @ 1:13 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…….14.0 NNW [337 total miles]
VECTOR #2……………..14.4
DAVIS #2………………14.0 NNW
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…….4.00 DEPARTURE….+3.78
TOTAL PRECIPITATION FOR THE MONTH………….4.00 DEPARTURE….+3.78
TOTAL PRECIPITATION FOR THE YEAR………….44.34 DEPARTURE….+9.77
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
08/01 77/58/68/-5/T/589/68 23 SSW AERO 24 SSW RMY N/A
08/02 78/61/70/-3/T/821/95 28 WNW AERO 28 WNW RMY N/A
08/03 76/60/68/-5/0.00/302/35 15 N AERO 16 N RMY N/A
08/04 75/61/68/-5/0.71/077/09 21 ESE AERO 21 ESE RMY N/A
08/05 68/61/65/-8/1.68/000/00 28 NE AERO 28 NE RMY N/A
08/06 85/62/74/+1/0.00/727/85 19 S AERO 20 WSW RMY N/A
08/07 88/66/77/+4/0.00/520/61 23 SW AERO 23 SW RMY N/A
08/08 80/67/74/+2/T/128/15 16 SW AERO 16 WNW RMY N/A
08/09 75/64/70/-2/0.25/076/09 22 ENE AERO 21 NE RMY N/A
08/10 78/63/71/-1/0.12/203/24 19 S AERO 20 S RMY N/A
08/11 89/70/80/+8/0.00/667/79 29 SSW AERO 28 SSW RMY N/A
08/12 91/71/81/+9/T/580/69 36 WSW AERO 37 WSW RMY N/A TSTM
08/13 92/73/83/+11/0.00/696/83 18 WSW AERO 18 WSW RMY N/A
08/14 87/69/78/+6/T/601/72 25 W AERO 25 NNW RMY N/A
08/15 80/62/71/-1/0.00/800/96 19 NNW AERO 20 NNW RMY N/A
08/16 78/59/69/-3/0.00/564/68 15 S AERO 15 S RMY N/A
08/17 82/63/73/1/0.00/555/67 22 SSW AERO 23 SSW RMY N/A
08/18 86/66/76/+5/0.00/338/41 21 SSW AERO 22 SSW RMY N/A
08/19 81/69/75/+4/0.62/222/27 41 S AERO 43 S RMY N/A
08/20 78/70/74/+3/0.01/…/.. 21 WSW AERO N/A RMY N/A
08/21 86/69/78/+7/0.00/…/.. 17 S AERO 17 S RMY N/A
08/22 74/66/70/-1/0.78/…/.. 47 ESE AERO 48 ESE RMY N/A
08/23 83/68/76/+5/1.17/…/.. 25 SSE AERO 26 SSE RMY N/A TSTM
08/24 86/67/77/+6/0.01/…/.. 21 NNW AERO 21 NNW RMY N/A
08/25 89/70/80/+10/0.00/…/.. 17 SW AERO 18 SW RMY N/A
08/26 92/72/82/+12/0.00/…/.. 19 WSW AERO 18 WSW RMY N/A
08/27 89/70/80/+10/T/…/.. 30 ENE AERO 30 ENE RMY N/A
08/28 70/59/65/-5/0.02/…/.. 34 ENE AERO 34 ENE RMY N/A
08/29 72/59/66/-4/T/…/.. 20 S AERO 21 S RMY N/A
08/30 84/67/76/+7/0.00/…/.. 25 SW AERO 26 SW RMY N/A
08/31 80/65/73/+4/0.00/…/.. 27 WNW AERO 28 WNW RMY N/A
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/…./…/.. 34 NNE AERO 37 NNE RMY N/A
09/02 71/55/63/-6/…./…/.. 49 ENE AERO 52 ENE RMY N/A TSTM
09/03 The low since midnight is 52F, the daily normal low is 60F
RECORDS FOR THE MONTH
08/22 NEW PEAK GUST RECORD OF 47 MPH,
BEATING THE OLD RECORD OF 44 MPH IN 1987
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1893
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)
RECORDS FOR SEPTEMBER 4
HIGH 90F IN 1953, 1973
LOW 46F IN 1987
PRECIP 3.22 INCHES IN 1922
PEAK GUST 47 MPH SE IN 1966
TODAY’S REPORT PREPARED BY: Benjamin Turner
