Friday, August 7, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, AUGUST 7, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
A FAIRLY QUIET DAY – MOSTLY CLOUDY SKIES AND
A FEW SPRINKLES ATOP GREAT BLUE HILL…
Not a whole lot to write home about today as we close
out the first full workweek of August. Skies have
been predominantly cloudy for the duration of the
day occasionally ejecting a sprinkle here and there,
but no measurable precipitation. The ceiling has
been comprised primarily of mid-and high-altitude
clouds so visibility has not been too poor- ranging
anywhere from 40 miles to 65 miles.
A bit of a break in the heat today as temperatures
bottomed out in the upper-60s early this morning,
and only mustering 79 degrees by 1PM. We will
likely dial up the heat (and humidity) yet again
by the time Sunday rolls in, so enjoy these more
manageable temperatures and dew points for another
few days. Winds continue to be rather gentle with
a peak gust of 14 MPH thus far.
The high so far today is 79F, which is 2 degrees
below the daily normal high of 81F. The low since
midnight is 68F, which is 5 degrees above the
daily normal low of 63F.
PRELIMINARY STATS FOR JULY 2020
TEMPERATURE, Deg. F
Avg. Max. 83.5 [+2.7]
Avg. Min. 66.0 [+3.1]
Mean 74.8 [+2.9]
24-hour corrected mean: 73.6
Max. for month: 95F on the 28th
Min. for month: 57F on the 16th
COOLING DEGREE DAYS
Total cooling units: 303 [+81]
Total for the season: 487 [+136]
Total for last season: 411
PRECIPITATION, Inches
Total: 1.72 [-2.30]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 9.1 mph
Avg. corrected wind speed: 9.8 mph
Prevailing wind direction: S AND WSW [12%]
Peak gust and direction: 39 S on the 11th
SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A
Today’s Observations:
7 A.M.
Weather: Broken Altostratus, (thin) Overcast Cirrostratus;
sun dimly visible
Temperature: 70F; Dew Point: 52F; Relative Humidity: 53%
Wind: NE at 8 kts
Sea-level pressure: 30.18 ins. Hg: Rising, then more rapidly
Visibility: 45 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 68F
24-hr Precip: 0.00 ins.
BHO SA 1155 E150 BKN E230 –OVC 45 220/70/52/0508/018/
SUN DMLY VSBL HAZY/ 8/015 53011 10070 20068
10 A.M.
Weather: Broken Altocumulus/Altostratus
Temperature: 74; Dew Point: 59F; Relative Humidity: 60%
Wind: NNE at 4 kts (wind light)
Sea-level pressure: 30.21 ins. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: Trace
BHO SA 1455 E100 BKN 40 229/74/59/0304/021/ HAZY WND LGT/
8/010 50009 6000/
1 P.M.
Weather: Broken Altocumulus/Altostratus, Broken Cirrostratus,
few cumulus distant W-N
Temperature: 75F; Dew Point: 60F; Relative Humidity: 59%
Wind: ENE at 9 kts
Sea-level pressure: 30.18 ins. Hg: falling, then more slowly
Visibility: 65 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 69F
6-hr Precip: Trace
BHO 1755 E150 BKN E230 BKN 65 220/75/60/0709/018/
FEW CU DSNT W-N HAZY/ 8/115 56009 6000/ 10079 20069
SUMMARY FOR THURSDAY, AUGUST 6, 2020
TEMPERATURE (DEGREES F)
MAX…..84 NORMAL…..81
MIN…..65 NORMAL…..63
MEAN….75 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL………………+3
TOTAL DEPARTURE FOR THE MONTH……………..+36 [+5.8 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………..10 DEPARTURE…….+3
TOTAL COOLING UNITS FOR THE MONTH……………..78 DEPARTURE……+35
TOTAL COOLING UNITS FOR THE SEASON……………565 DEPARTURE…..+171
TOTAL COOLING UNITS LAST SEASON TO DATE……….459 DEPARTURE…..+106
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..20 W AT 3:52 P.M.
AERO…………………….17 W AT 4:00 P.M.
ASOS…………………….20 SW AT 4:00 P.M.
DAVIS……………………20 WSW AT 3:59 P.M
RMY 19 MERLIN 18
FASTEST MILE FOR YESTERDAY………………….13 W AT 4:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 W AT 4:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 W AT 4:01 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.0 NW
ASOS……………………7.0
DAVIS…………………..7.4 W [274 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.23 DEPARTURE……-0.67
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….29.30 DEPARTURE……-2.59
ASOS………….30.04
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 76/63/70/0/0.00/228/25 16 E AERO 14 E RMY 14 TSTM
07/02 86/61/74/+4/0.00/803/88 30 WSW AERO 25 WSW RMY 33
07/03 73/60/67/-4/0.00/091/10 30 NE AERO 28 NE RMY 30
07/04 79/60/70/-1/0.00/565/62 16 S AERO 16 S RMY 16
07/05 83/63/73/+2/0.54/373/41 24 NW AERO 30 NW RMY 26 TSTM
07/06 73/60/67/-4/0.00/482/53 20 ENE AERO 16 NNE RMY 18
07/07 78/60/69/-2/0.00/454/50 25 S AERO 25 S RMY 26
07/08 83/64/74/+2/0.00/227/25 32 SSW AERO 32 SSW RMY 32
07/09 89/70/80/+8/0.00/834/92 24 S AERO 23 S RMY 22
07/10 83/70/77/+5/0.05/109/12 30 SSE AERO 32 SSE RMY N/A
07/11 85/70/78/+6/0.00/614/68 39 S AERO 39 S RMY 38
07/12 86/70/78/+6/0.00/830/92 28 WSW AERO 28 WSW RMY 29
07/13 82/69/76/+4/0.23/306/34 30 SSE AERO 31 SSE RMY 30 TSTM
07/14 78/63/71/-1/0.00/369/41 26 ENE AERO 25 ENE RMY 26
07/15 72/59/66/-6/0.00/539/60 21 NE AERO 21 NE RMY N/A
07/16 73/57/65/-7/0.00/815/91 21 E AERO 21 E RMY 19
07/17 71/57/64/-8/0.19/027/03 24 SSW AERO 24 SSW RMY 25
07/18 89/66/78/+6/0.00/822/92 18 W AERO 17 W RMY 19
07/19 92/69/81/+9/0.00/722/81 28 S AERO 28 S RMY 26
07/20 91/72/82/+10/T/481/54 25 SSW AERO 25 SSW RMY N/A
07/21 88/68/78/+6/0.00/799/90 25 W AERO 25 W RMY 24
07/22 80/67/74/+2/…./275/31 16 ENE AERO M M RMY 16
07/23 88/68/78/+6/0.48/203/23 31 N AERO 32 N RMY 31 TSTM
07/24 81/68/75/+3/0.00/476/54 15 ENE AERO 15 ENE RMY 16
07/25 88/67/78/+6/0.00/845/96 18 W AERO 18 WNW RMY N/A
07/26 89/70/80/+8/0.00/632/72 27 W AERO 28 W RMY 27
07/27 94/72/83/+11/0.00/823/94 23 SW AERO 25 SW RMY N/A
07/28 95/74/85/+13/0.01/…/.. 28 WSW AERO 25 WSW RMY 25
07/29 90/68/79/+7/0.00/…/.. 23 SSW AERO 25 SSW RMY 24
07/30 88/71/80/+8/0.00/…/.. 29 W AERO 28 W RMY 29
07/31 84/69/77/+5/0.00/…/.. 14 ENE AERO 14 ENE RMY 15
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 87/66/77/+5/0.00/…/.. 18 S AERO 21 S RMY 19
08/02 85/69/77/+5/0.02/…/.. 36 S AERO 37 S RMY 38
08/03 91/75/83/+11/0.00/…/.. 36 WSW AERO 38 SW RMY 36
08/04 83/71/77/5/0.21/…/.. 67 SSE AERO 71 S RMY 70
08/05 90/68/79/+7/0.00/…/.. 28 SW AERO 30 SW RMY 29
08/06 84/65/75/3/0.00/…/.. 20 W AERO 17 W RMY 19
08/07 The low since midnight is 68F, 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 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958
TODAY’S REPORT PREPARED BY: Andrew Swanson
