Monday, August 2, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, AUGUST 2, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0438E
SUNSET: 1902E
ANOTHER NICE DAY WITH A MIX OF SUN AND CLOUDS, GOOD VISIBILITY,
AND COMFORTABLE HUMIDITY LEVELS….
Can’t really ask for much better in early August. The sky has
been decorated with mostly cumulus clouds since about mid
morning and the visibility has been excellent for this time of
year holding at around 60 miles this afternoon.
The dew point, which is a direct measurement of the amount of
moisture in the air, has been mainly in the upper 50s today.
This has made the air feel delightful with a W to NW breeze which
has been gusting 20-25 mph at times.
With all the talk about how wet July was, the monthly total
ended up being 11.59″, which was only 0.09″ away from breaking
the all-time wettest July on record. Instead we have to settle
with July 2021 coming in at 2nd place on the rankings.
BHO Wettest Julys, inches (1885-2021)
1) 11.67 in 1938
2) 11.59 in 2021
3) 10.68 in 1988
4) 10.43 in 1921
5) 9.52 in 1915
6) 8.47 in 1889
7) 7.62 in 2009
8) 7.55 in 1916
The high so far today is 77F, 5 degrees below the daily normal
maximum of 82F. The low so far today is 61F, which is 3 degrees
below the daily normal minimum of 64F.
———————————————–
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, few stratocumlus all quadrants,
few altocumulus castellanus distant WNW-NW
Temperature: 65F; Dew Point: 60F; Relative Humidity: 83%
Wind: W @ 7 kts
Sea-level pressure: 29.86 in. Hg; rising, then more rapidly
Visibility: 45 miles
6-hr Max temp: 65F
6-hr Min temp: 61F
24-hr Precip: Trace
BHO SA 1155 300 -SCT 45 112/65/60/2707/986/ FEW SC ALQDS
FEW ACC DSNT WNW-NW/ 8/581 53004 70000 10065 20061
10 A.M.
Weather: Broken cumulus
Temperature: 73F; Dew Point: 57F; Relative Humidity: 57%
Wind: WNW @ 9G18 kts
Sea-level pressure: 29.88 in Hg; rising, then more rapidly
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E30 BKN 60 117/73/57/3009G18/988/ 8/200 53005
1 P.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 76F, Dew point: 58F; Relative Humidity: 55%
Wind: NW @ 9G17 kts
Sea-level pressure: 29.91 in Hg; rising steadily
Visibility: 60 miles
6-hr Max temp: 77F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 30 SCT 50 SCT 60 128/76/58/3109G17/991/
8/260 52011 10077 20065
SUMMARY FOR SATURDAY, AUGUST 1, 2021
TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..82
MIN…….58 NORMAL…..64
MEAN……68 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………..-5
TOTAL DEPARTURE FOR THE MONTH…………………..-5 [-5.2 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………0
TOTAL HEATING UNITS FOR THE SEASON…………..28 DEPARTURE…….+21
TOTAL HEATING UNITS LAST SEASON TO DATE……….1 DEPARTURE…….+27
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………….3 DEPARTURE……. -5
TOTAL COOLING UNITS FOR THE SEASON………….382 DEPARTURE…….-13
TOTAL COOLING UNITS LAST SEASON TO DATE……..499 DEPARTURE……-117
PEAK WIND GUST (MPH):
Official……………….23 SSW @ 6:02 P.M.
AEROVANE (south tower)…..24 SSW @ 6:20 P.M.
VECTOR #2 (south tower)….24 @ 5:57 P.M.
DAVIS #2 (south tower)…..24 S @ 8:03 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………………16 SSW @ 6:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 6:04 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 SSW @ 6:04 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…… 7.6 S [183 total miles] VECTOR #2……………. 8.3
DAVIS #2…………….. 8.0 SW
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….-0.13
TOTAL PRECIPITATION FOR THE MONTH…………TRACE DEPARTURE….-0.13
TOTAL PRECIPITATION FOR THE YEAR………….34.97 DEPARTURE….+4.40
PRELIMINARY CLIMATE SUMMARY FOR JULY 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
07/01 80/65/73/+2/0.74/155/17 22 W AERO 20 WSW RMY 21
07/02 65/55/60/-11/1.49/000/00 37 NE AERO 36 NE RMY 39
07/03 56/54/55/-17/1.98/000/00 41 NE AERO 44 NE RMY 45 TSTM
07/04 66/54/60/-12/0.16/191/21 26 ENE AERO 23 ENE RMY 26
07/05 74/53/64/-8/0.01/546/60 26 SSW AERO 28 SSW RMY 27
07/06 87/66/77/+5/0.26/255/28 37 W AERO 48 W RMY 38 TSTM
07/07 88/88/77/+5/0.77/699/77 63 NW AERO 75 NW RMY 70 TSTM
07/08 67/59/63/-9/0.38/109/12 46 W AERO 46 W RMY 51 TSTM
07/09 73/62/68/-5/3.02/163/18 40 WNW AERO 44 WNW RMY 43
07/10 71/63/67/-6/0.07/109/12 23 NE AERO 21 NNE RMY 22
07/11 81/61/71/-2/T/325/36 21 SW AERO 19 S RMY N/A
07/12 67/61/64/-9/1.01/000/00 31 ENE AERO 31 ENE RMY N/A
07/13 66/60/63/-10/0.02/000/00 19 E AERO 18 E RMY N/A
07/14 80/62/71/-2/0.01/216/24 19 S AERO 18 S RMY N/A
07/15 88/67/78/+5/0.00/844/94 19 WSW AERO 18 SSW RMY N/A
07/16 90/70/80/+7/0.04/609/68 36 NNW AERO 39 NNW RMY N/A TSTM
07/17 78/64/71/-2/0.34/394/44 26 ENE AERO 25 ENE RMY N/A TSTM
07/18 74/63/69/-4/0.15/000/00 22 NE AERO 22 NE RMY N/A TSTM
07/19 71/63/67/-6/0.07/027/03 17 ENE AERO 17 ENE RMY N/A
07/20 83/64/74/+1/0.00/730/82 23 NW AERO 23 NW RMY N/A
07/21 79/62/71/-2/0.16/577/65 26 NNW AERO 23 NNW RMY N/A TSTM
07/22 79/58/69/-4/T/656/74 20 WNW AERO 20 WNW RMY N/A
07/23 79/62/71/-2/0.00/708/80 22 S AERO 21 S RMY N/A TSTM
07/24 78/59/69/-4/0.00/830/94 19 S AERO 18 S RMY N/A
07/25 71/64/68/-5/0.08/009/01 40 SSW AERO 41 SSW RMY N/A
07/26 87/67/77/+4/0.01/765/87 27 WSW AERO 25 WNW RMY N/A
07/27 87/65/76/+3/0.56/…/.. 55 NW AERO 58 NW RMY N/A TSTM
07/28 72/61/67/-6/0.06/…/.. 18 NNE AERO 18 NNE RMY N/A
07/29 77/61/69/-4/0.19/…/… 39 S AERO 40 S RMY N/A
07/30 78/58/68/-5/0.01/…/.. 31 NW AERO 31 NW RMY N/A
07/31 74/52/63/-10/0.00/…/.. 24 WNW AERO 25 WNW RMY N/A
RECORDS FOR JULY:
JULY 2: Record daily precipitation of 1.49″,
Surpasses previous record of 1.42″ set in 1986
JULY 3: Record daily precipitation of 1.98″,
Surpasses previous record of 1.36″ set in 1985
JULY 7: Record peak gust of 63 MPH,
Surpasses previous record of 55 MPH set in 1989
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/…/.. 23 SSW AERO 24 SSW RMY N/A
08/02 The low since midnight is 61F, the daily normal low is 64F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM – Tied with 8/10/1949]LOW 50F IN 1929, 1947
PRECIP 1.94 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006
RECORDS FOR AUGUST 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]
TODAY’S REPORT PREPARED BY: Matt Douglas
