Monday, August 19, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 19, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
HOT WITH ABUNDANT SUNSHINE AND SOME
AFTERNOON THUNDERSTORMS….
We observed a distant haze that increased as
the day went on, bringing visibility from
65 miles to 40 miles. Wind was southwesterly,
blowing at an average of 15 mph. Thunderstorms
occurred this afternoon, with thunder being
heard between 3 P.M. and 6 P.M. Trace amounts
of rain fell within that time, with the majority
missing the observatory. The high so far today
is 92F, 13 degrees above the daily normal maximum
of 79F. The low since midnight is 71F, 9 degrees above
the average daily minimum of 62F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 74F; Dew Point: 68F; Wind: SW at 7 kts
Sea-level pressure: 29.99 ins. Hg, falling, then rising
Visibility: 65 miles, distant haze
6-hr Max temp: 74F
6-hr Min temp: 71F
24-hr Precip: Trace
BHO SA 1155 140 SCT E250 BKN 65 158/74/68/2207/999/
DSNT HZ ALQDS/ 8/062 50005 10074 20071
10 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 84F; Dew Point: 71F; Wind: NNW at 10G19 kts
Sea-level pressure: 29.98 ins. Hg, rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 140 SCT E250 BKN 40 155/84/71/2410G19/998/
HAZY/ 8/062 55003
1 P.M.
Weather: Scattered cumulus, scattered altocumulus,
broken cirrostratus
Temperature: 88F; Dew Point: 71F; Wind: WSW at 9G18 kts
Sea-level pressure: 29.94 ins. Hg, falling steadily
Visibility: 40 miles, hazy
6-hr Max temp: 92F
6-hr Min temp: 74F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 150 SCT E230 BKN 40 144/88/71/2509G18/994/
HAZY/ 8/268 58011 10092 20074
SUMMARY FOR SUNDAY, AUGUST 18, 2019
TEMPERATURE (DEGREES F)
MAX…..88 NORMAL…..79
MIN…..70 NORMAL…..62
MEAN….79 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL………………….+8
TOTAL DEPARTURE FOR THE MONTH…………………+12 [+0.5 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..14 DEPARTURE………+8
TOTAL COOLING UNITS FOR THE MONTH………….129 DEPARTURE………+8
TOTAL COOLING UNITS FOR THE SEASON…………540 DEPARTURE……..+68
TOTAL COOLING UNITS LAST SEASON TO DATE…….661 DEPARTURE…….-121
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 SSW AT 9:25 P.M.
AERO…………………….18 SSW AT 9:21 P.M.
ASOS…………………….20 SSW AT 10:22 P.M.
DAVIS……………………19 S AT 9:15 P.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….14 SSW AT 9:14 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 SSW AT 10:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 ESE AT 2:51 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.5 S
ASOS…………………..7.0
DAVIS………………….6.8 SSW [195 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.83 DEPARTURE……-1.67
ASOS…………..0.82
TOTAL PRECIPITATION FOR THE YEAR……….36.15 DEPARTURE……+2.66
ASOS………….36.10
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 Low temp since midnight is 71F; normal low is 62F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 19
HIGH 90F IN 1906, 1966, 2002
LOW 48F IN 1958
PRECIP 7.02 INCHES IN 1955 [DIANE – RECORD FOR MONTH]
PEAK GUST 78 MPH ENE IN 1991 – HURRICANE BOB
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
TODAY’S REPORT PREPARED BY: Benjamin Turner
