Tuesday, August 20, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 20, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
WARM AND DRY WITH FAIR WEATHER AND
LIGHT WINDS….
Visibility was good throughout the day,
with 70 miles on average being observed.
Conditions were fair and dry, with partly
cloudy skies and a humidity of 30% in the
afternoon. Wind was westerly and light, with
a speed of around 5 mph. The high so far today
is 86F, 7 degrees above the daily normal maximum
of 79F. The low since midnight is 66F, 4 degrees
above the average daily minimum of 62F.
Today’s Observations:
7 A.M.
Weather: Scattered cirrus
Temperature: 70F; Dew Point: 62F; Wind: WNW at 7 kts
Sea-level pressure: 30.09 ins. Hg, rising steadily
Visibility: 75 miles
6-hr Max temp: 70F
6-hr Min temp: 66F
24-hr Precip: 0.03 ins.
BHO SA 1155 250 SCT 75 189/70/62/2907/009/ 8/001
51017 10070 20066
10 A.M.
Weather: Scattered cirrus
Temperature: 79F; Dew Point: 61F; Wind: WNW at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.10 ins. Hg, falling, then rising
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 70 193/79/61/2904/010/ WND L/V/
8/002 50004
1 P.M.
Weather: Scattered cirrus, few cumulus NW-N, E-SE
Temperature: 85F; Dew Point: 57F; Wind: WNW at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.07 ins. Hg, falling steadily
Visibility: 65 miles
6-hr Max temp: 86F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 SCT 65 185/85/57/2903/007/ WND L/V/
FEW CU NW-N AND E-SE/ 8/102 58008 10086 20070
SUMMARY FOR MONDAY, AUGUST 19, 2019
TEMPERATURE (DEGREES F)
MAX…..92 NORMAL…..79
MIN…..69 NORMAL…..62
MEAN….81 NORMAL…..70
DEPARTURE FROM 30-YEAR NORMAL…………………+11
TOTAL DEPARTURE FOR THE MONTH…………………+23 [+1.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..16 DEPARTURE……..+10
TOTAL COOLING UNITS FOR THE MONTH………….145 DEPARTURE……..+18
TOTAL COOLING UNITS FOR THE SEASON…………556 DEPARTURE……..+78
TOTAL COOLING UNITS LAST SEASON TO DATE…….661 DEPARTURE…….-105
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25 WSW AT 5:09 P.M.
AERO…………………….23 WSW AT 5:04 P.M.
ASOS…………………….24 SSW AT 6:47 P.M.
DAVIS……………………26 SW AT 4:10 P.M. RMY 25
FASTEST MILE FOR YESTERDAY………………….18 WSW AT 6:22 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 SW AT 6:50 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………18 SW AT 6:49 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.1 SW
ASOS………………….11.2
DAVIS…………………11.1 SW [233 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03 DEPARTURE……-0.10
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE MONTH……….0.86 DEPARTURE……-1.77
ASOS…………..0.85
TOTAL PRECIPITATION FOR THE YEAR……….36.13 DEPARTURE……+2.56
ASOS………….36.13
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
8/01 84/66/75/+3/0.00/755/87 18 NNW AERO 20 NW RMY 17
8/02 83/61/72/0/0.00/804/93 18 WSW AERO 18 WSW RMY 18
8/03 84/66/75/+3/0.00/302/35 25 SW AERO 26 SW RMY 25
8/04 83/66/75/+3/0.00/732/85 21 NE AERO 23 SW RMY 25
8/05 81/58/70/-2/0.00/842/98 20 S AERO 18 S RMY 19
8/06 79/63/71/-1/0.00/282/33 15 S AERO 14 S RMY 17
8/07 82/66/74/+2/…./367/43 32 SSW AERO 35 SSW RMY 35
8/08 84/67/76/+4/…./588/69 30 SW AERO 24 WNW RMY 29
8/09 82/63/73/+1/…./815/96 28 NW AERO 25 NW RMY 26
8/10 78/59/69/-2/…./669/79 32 NW AERO 28 NW RMY 28
8/11 78/55/67/-4/0.00/…/.. 28 W AERO 25 W RMY 28
8/12 82/60/71/0/0.00/…/.. 25 W AERO 23 W RMY 26
8/13 77/66/72/+1/0.02/…/.. 25 W AERO 24 WSW RMY 24
8/14 75/62/69/-2/…./…/.. 24 ENE AERO 22 ENE RMY 22
8/15 77/59/68/-3/…./…/.. 17 ESE AERO 15 SSE RMY 16
8/16 78/61/70/-1/…./../.. 20 E AERO 17 ESE RMY 18
8/17 78/67/73/2/…./../.. 14 SE AERO 15 SE RMY 15
8/18 88/70/79/+8/…./…/.. 18 SSW AERO 18 SSW RMY 21
8/19 92/69/81/+11/…./…/.. 25 WSW AERO 23 WSW RMY 25
8/20 Low temp since midnight is 66F; normal low is 62F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 20
HIGH 93F IN 1937
LOW 48F IN 1896, 1905, 1949
PRECIP 2.71 INCHES IN 1970
PEAK GUST 47 MPH W IN 1983
RECORDS FOR AUGUST 21
HIGH 92F IN 1937, 1995
LOW 47F IN 1982
PRECIP 2.84 INCHES IN 1888
PEAK GUST 54 MPH WSW IN 2004
TODAY’S REPORT PREPARED BY: Benjamin Turner
