Sunday, August 9, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, AUGUST 9, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
PARTLY CLOUDY WITH LIMITED VISIBILITY
AND WIND PICKING UP AROUND NOONTIME….
Today was hazy, with the majority of the sky
cover being clouds. Visibility was limited to
35 miles at best, being observed at the 1 P.M.
observation. Wind this morning was light, but
reached 20 mph from the southwest by noontime.
The average wind speed is currently 15 mph.
Humidity has dropped to 50%, and dew points have
held in the mid to upper 60’s. Another great day
for a tour, we are open until 4 P.M. EDT.
We are looking at another dry month so far, with
a rain deficit of almost an inch. The yearly
departure is 2.87 inches below the normal.
The high so far today is 89F, which is 9 degrees
below the daily normal high of 80F. The low since
midnight is 65F, which is 2 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 [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: Scattered altocumulus, broken cirrostratus
Temperature: 70F; Dew Point: 67F; Relative Humidity: 89%
Wind: NE at 7 kts
Sea-level pressure: 30.13 ins. Hg: Rising then falling
Visibility: 20 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 90 SCT 250 BKN 20 204/70/67/2207/013/ FEW CU
ALQDS HAZY/ 8/236 50003 10070 20065
10 A.M.
Weather: Scattered cumulus and altocumulus, broken
cirrus
Temperature: 83F; Dew Point: 68F; Relative Humidity: 61%
Wind: SSW at 7 kts
Sea-level pressure: 30.11 ins. Hg: falling steadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 60 SCT 100 SCT 250 30 198/83/68/2207/011/
HAZY/ 8/152 58006
1 P.M.
Weather: Broken cumulus and altocumulus
Temperature: 87F; Dew Point: 64F; Relative Humidity: 48%
Wind: SSW at 12G16 kts
Sea-level pressure: 30.06 ins. Hg: falling, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 89F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 BKN 100 BKN 35 183/87/64/2012G16/006/ HAZY/
8/250 58015 10089 20070
SUMMARY FOR SATURDAY, AUGUST 8, 2020
TEMPERATURE (DEGREES F)
MAX…..79 NORMAL…..80
MIN…..65 NORMAL…..63
MEAN….72 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………..+2
TOTAL DEPARTURE FOR THE MONTH……………..+38 [+4.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………………9 DEPARTURE…….+2
TOTAL COOLING UNITS FOR THE MONTH……………..94 DEPARTURE……+37
TOTAL COOLING UNITS FOR THE SEASON……………581 DEPARTURE…..+173
TOTAL COOLING UNITS LAST SEASON TO DATE……….479 DEPARTURE…..+102
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..20 S AT 9:28 P.M.
AERO…………………….20 S AT 9:30 P.M.
ASOS…………………….20 SSW AT 9:32 P.M.
DAVIS……………………19 NE AT 1:18 P.M
RMY 19 MERLIN 19
FASTEST MILE FOR YESTERDAY………………….15 S AT 9:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 S AT 9:32 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 ENE AT 1:18 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.0 E
ASOS……………………7.3
DAVIS…………………..7.2 ESE [121 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……-0.95
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….29.30 DEPARTURE……-2.87
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 79/65/72/0/T/…/.. 16 NE AERO 16 NE RMY N/A
08/08 83/64/74/+2/0.00/…/.. 20 S AERO 20 S RMY 19
08/09 The low since midnight is 65F, 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 9
HIGH 100F IN 1949
LOW 49F IN 1899
PRE 2.65 INS IN 1976
PEAK GUST 90 MPH SW IN 1968
RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976
TODAY’S REPORT PREPARED BY: Benjamin Turner
