Monday, August 16, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, AUGUST 16, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0453E
SUNSET: 1844E
GOOD WEATHER AND VISIBILITY WITH BELOW AVERAGE
TEMPERATURES….
What a difference today compared to the past week. After that
stretch of hot and humid weather, today is offering more welcomed
relief with temperatures in the upper 60’s to the lower 70’s More
importantly, the dewpoint is about 15-20 degrees lower today making
it feel very refreshing!
With the drier air mass in place, visibility has been excellent today
holding around 70 miles all day.
The wind is light and very variable in terms of direction.
The high so far today is 78F, 3 degrees below the daily normal maximum
of 81F. The low so far today is 59F, which is 4 degrees below the daily
normal minimum of 63F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 64F; Dew Point: 59F; Relative Humidity: 84%
Wind: NNE @ 4 kts, light and variable
Sea-level pressure: 30.25 in. Hg; rising, then more slowly
Visibility: 75 miles
6-hr Max temp: 65F
6-hr Min temp: 59F
24-hr Precip: 0.00 ins.
BHO SA 1155 140 SCT 250 BKN 75 243/64/59/0204/025/ WND L/V/
8/071 53008 10065 20059
10 A.M.
Weather: Scattered cumulus and altocumulus, broken cirrus
Temperature: 71F; Dew Point: 61F; Relative Humidity: 72%
Wind: E @ 4 kts, wind light
Sea-level pressure: 30.26 in Hg; rising unsteadily
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT 140 SCT 250 BKN 65 248/71/61/0904/026/ BINOVC
ALQDS WND L/V/ 8/171 52005
1 P.M.
Weather: Scattered cumulus and altocumulus, broken cirrus
Temperature: 74F, Dew point: 60F; Relative Humidity: 62%
Wind: WNW @ 4 kts, light and variable
Sea-level pressure: 30.24 in Hg; falling steadily
Visibility: 60 miles
6-hr Max temp: 78F
6-hr Min temp: 64F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 140 SCT 250 BKN 60 239/74/60/2904/024/ BINOVC
ALQDS WND L/V/ 8/171 58009 10078 20064
SUMMARY FOR SUNDAY, AUGUST 15, 2021
TEMPERATURE (DEGREES F)
MAX…….80 NORMAL…..81
MIN…….62 NORMAL…..63
MEAN……71 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………. -1
TOTAL DEPARTURE FOR THE MONTH………………….+11 [+0.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………..28 DEPARTURE…….+18
TOTAL HEATING UNITS LAST SEASON TO DATE……….1 DEPARTURE…….+27
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….6 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………..123 DEPARTURE……..+9
TOTAL COOLING UNITS FOR THE SEASON………….502 DEPARTURE……..+3
TOTAL COOLING UNITS LAST SEASON TO DATE……..672 DEPARTURE……-170
PEAK WIND GUST (MPH):
Official……………….19 NNW @ 6:07 A.M.
AEROVANE (south tower)…..20 NNW @ 6:08 A.M.
VECTOR #2 (south tower)….20 @ 6:07 A.M.
DAVIS #2 (south tower)…..18 N @ 6:08 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………………13 NNW @ 6:00 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 6:00 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 N @ 6:00 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…… 6.4 NNW [154 total miles]
VECTOR #2……………. 7.4
DAVIS #2…………….. 6.9 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…….0.00 DEPARTURE….-0.13
TOTAL PRECIPITATION FOR THE MONTH………….2.76 DEPARTURE….+0.80
TOTAL PRECIPITATION FOR THE YEAR………….37.73 DEPARTURE….+5.33
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/…/.. 19 S AERO 20 S RMY N/A
08/11 89/70/80/+8/0.00/…/.. 29 SSW AERO 28 SSW RMY N/A
08/12 91/71/81/+9/T/…/.. 36 WSW AERO 37 WSW RMY N/A TSTM
08/13 92/73/83/+11/0.00/…/.. 18 WSW AERO 18 WSW RMY N/A
08/14 87/69/78/+6/T/…/.. 25 W AERO 25 NNW RMY N/A
08/15 80/62/71/-1/0.00/…/.. 19 NNW AERO 20 NNW RMY N/A
08/16 The low since midnight is 59F, the daily normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.31 INCHES IN 1951
PEAK GUST 45e MPH N IN 1951
RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962
TODAY’S REPORT PREPARED BY: Benjamin Turner
