Saturday, August 28, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, AUGUST 28, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0505E
SUNSET: 1824E
MUCH COOLER AND DRIER AIR TODAY UNDER MAINLY CLOUDY SKIES….
The much anticipated (and appreciated) relief from the hot and humid
weather of the past few days finally arrived overnight. The dew point
dropped from near 70 last night to the mid 50s this morning. It’s been
holding in the mid 50s all day. Combined with a brisk east-northeast
wind, it feels quite refreshing today.
Skies have been mainly cloudy today, although this morning clouds
were thin enough to afford some sunshine. Despite the morning sun,
temperatures still didn’t rebound much from the morning low. So
far the maximum temperature has been 70F, which was also the reading
back at midnight.
Visibility today has been hanging around 40-50 miles!
The high so far today, as mentioned, is 70F, this is 9 degrees below
the daily normal maximum of 79F. The low so far today is 64F, which is
3 degrees above the daily normal minimum of 61F.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, scattered altocumulus, scattered cirrostratus,
thin broken cirrus
Temperature: 65F; Dew Point: 57F; Relative Humidity: 75%
Wind: ENE @ 12G17 kts
Sea-level pressure: 1027.2 mb; 30.33 in. Hg; rising, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr Precip: TRACE
BHO SA 1155 20 SCT 85 SCT 180 SCT E250 -BKN 40 272/65/57/0712G17/033/
HAZY/ 8/558 51016 70000 10068 20064
10 A.M.
Weather: Scattered stratocumulus, scattered altocumulus/altostratus,
scattered cirrocumulus, thin broken cirrus
Temperature: 67F; Dew Point: 56F; Relative Humidity: 67%
Wind: ENE @ 13G20 kts
Sea-level pressure: 1028.1 mb; 30.36 in Hg; steady, then rising
Visibility: 50 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 20 SCT 50 SCT 180 SCT E250 -BKN 50 281/67/56/0713G20/036/
8/579 53009
1 P.M.
Weather: Scattered stratocumulus, overcast altocumulus, few breaks in
overcast all quadrants, higher clouds visible
Temperature: 67F, Dew point: 55F; Relative Humidity: 67%
Wind: ENE @ 9G18 kts
Sea-level pressure: 1028.1 mb; 30.36 in Hg; falling, then rising
Visibility: 50 miles
6-hr Max temp: 70F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT E90 OVC 50 281/67/55/0609G18/036/ FEW BINOVC ALQDS
HIER CLDS VSBL/ 8/57/ 55000 10070 20065
SUMMARY FOR FRIDAY, AUGUST 27, 2021
TEMPERATURE (DEGREES F)
MAX…….89 NORMAL…..79
MIN…….70 NORMAL…..61
MEAN……80 NORMAL…..70
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………..+10
TOTAL DEPARTURE FOR THE MONTH…………………..+70 [+2.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………..28 DEPARTURE…….+13
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE…….+25
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY……………15 DEPARTURE……..+9
TOTAL COOLING UNITS FOR THE MONTH…………..251 DEPARTURE…….+62
TOTAL COOLING UNITS FOR THE SEASON………….630 DEPARTURE…….+55
TOTAL COOLING UNITS LAST SEASON TO DATE……..746 DEPARTURE……-116
PEAK WIND GUST (MPH):
Official……………….30 ENE @ 11:48 P.M.
AEROVANE (south tower)…..30 ENE @ 11:48 P.M.
VECTOR #2 (south tower)….33 @ 11:48 P.M.
DAVIS #2 (south tower)…..29 E @ 11:48 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………………20 NE @ 11:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 11:34 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 ENE @ 11:34 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…….7.5 NE [179 total miles]
VECTOR #2……………..8.6
DAVIS #2………………8.4 NE
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……TRACE DEPARTURE….-0.12
TOTAL PRECIPITATION FOR THE MONTH………….5.35 DEPARTURE….+1.91
TOTAL PRECIPITATION FOR THE YEAR………….40.32 DEPARTURE….+6.44
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 The low since midnight is 64F, the daily normal low is 61F
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 AUGUST 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE IN 1971 (DORIA)
RECORDS FOR AUGUST 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S IN 1949
TODAY’S REPORT PREPARED BY: Matt Douglas and Augustin Busschaert
