Friday, August 16, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 16, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
COOL WITH A LIGHT EASTERLY BREEZE AND
LIMITED VISIBILITY….
We observed the highest visibility so far today of
45 miles at the 10 A.M. observation. Foggy conditions
and an undercast limited visibility to 5 miles
at 7 A.M. A light sea breeze persisted throughout the
day, keeping temperatures slightly below seasonal
averages. The high so far today is 78F, a degree below
the daily normal maximum of 79F. The low since midnight
is 61F, a degree below the normal minimum of 62F.
PRELIMINARY STATS FOR JULY 2019
TEMPERATURE, Deg. F
Avg. Max. 84.6 [+3.8]
Avg. Min. 65.6 [+2.7]
Mean 75.1 [+3.2]
24-hour corrected mean: 74.5
Max. for month: 93F on the 20th, 30th
Min. for month: 58F on the 1st, 23rd
COOLING DEGREE DAYS
Total cooling units: 322 [+100]
Total for the season: 411 [+60]
Total for last season: 455
PRECIPITATION, Inches
Total: 5.45 [+1.43]
Greatest in 24 hrs: 2.08 on the 22nd-23rd
WIND, mph
Avg. uncorrected wind speed: 8.8
Avg. corrected wind speed: 9.6
Prevailing wind direction: W at 14%
Peak gust and direction: 44 W on 17th
SUNSHINE:
Campbell-Stokes card minutes: 18300 minutes of possible 26682 or 69%
Astronomical total minutes: 19049 minutes of possible 27759 or 69%
Today’s Observations:
7 A.M.
Weather: Broken cumulus, partial undercast in all
directions
Temperature: 66F; Dew Point: 63F; Wind: ESE at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.10 ins. Hg, rising, then more quickly
Visibility: 5 miles, fog
6-hr Max temp: 66F
6-hr Min temp: 61F
24-hr Precip: 0.00 ins.
BHO SA 1155 E10 BKN 5F 192/66/63/1004/010/ PARTIAL
UNDERCAST ALQDS WND L/V/ 8/800 53009 10066 20061
10 A.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 74F; Dew Point: 62F; Wind: ESE at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.10 ins. Hg, rising steadily
Visibility: 45 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 15 SCT E250 BKN 45 194/74/62/1104/010/
DSNT HZ ALQDS WND L/V/ 8/102 53002
1 P.M.
Weather: Broken cirrus, few distant cumulus
Temperature: 77F; Dew Point: 65F; Wind: NE at 9 kts
Sea-level pressure: 30.07 ins. Hg, falling, then more quickly
Visibility: 40 miles due to distant haze, and 20 miles to
the N-NE due to offshore fog
6-hr Max temp: 78F
6-hr Min temp: 64F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 BKN 40 186/77/65/0409/007/ FEW CU DSNT HZ
ALQDS DSNT FG OFFSHR VSBY N-NE 20 MI/ 8/102 56008 10078
20064
SUMMARY FOR THURSDAY, AUGUST 15, 2019
TEMPERATURE (DEGREES F)
MAX…..77 NORMAL…..80
MIN…..59 NORMAL…..62
MEAN….68 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL………………….-3
TOTAL DEPARTURE FOR THE MONTH………………….+3 [+0.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………3 DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH………….102 DEPARTURE………-1
TOTAL COOLING UNITS FOR THE SEASON…………513 DEPARTURE……..+59
TOTAL COOLING UNITS LAST SEASON TO DATE…….629 DEPARTURE…….-116
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..17 ESE AT 3:32 P.M.
AERO…………………….15 SSE AT 5:53 P.M.
ASOS…………………….18 ENE AT 3:38 P.M.
DAVIS……………………18 E AT 3:37 P.M. RMY 16
FASTEST MILE FOR YESTERDAY………………….13 ESE AT 3:38 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 E AT 3:47 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 E AT 3:38 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.6 E
ASOS…………………..7.2
DAVIS………………….7.2 E [94 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……….0.82 DEPARTURE……-1.29
ASOS…………..0.82
TOTAL PRECIPITATION FOR THE YEAR……….36.14 DEPARTURE……+3.04
ASOS………….36.10
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 83/58/71/+1/0.00/896/98 21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/329/36 23 W AERO 23 W RMY 23
07/03 89/67/78/+7/0.00/866/95 18 S AERO 18 S RMY 18
07/04 88/68/78/+7/0.00/748/82 17 SSW AERO M M RMY 17
07/05 87/69/78/+7/0.00/829/91 21 SW AERO M M RMY 21
07/06 90/71/81/+10/0.83/646/71 26 WNW AERO M M RMY N/A TSTM
07/07 78/64/71/0/0.00/827/91 30 NE AERO M M RMY N/A
07/08 79/59/69/-3/0.00/763/84 16 N AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/871/96 18 NW AERO 16 NW RMY 18
07/10 88/69/79/+7/0.00/607/67 20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/0.62/000/00 35 S AERO 33 S RMY 36
07/12 84/68/76/+4/0.00/316/35 31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/812/90 21 W AERO 20 WSW RMY 20
07/14 87/68/78/+6/0.00/702/78 25 W AERO 21 W RMY 23
07/15 82/63/73/+1/0.00/791/88 24 WNW AERO 23 WNW RMY 22
07/16 86/65/76/+4/0.00/682/76 23 W AERO 21 W RMY 21
07/17 90/70/80/+8/1.32/260/29 44 W AERO M M RMY 47 TSTM
07/18 72/61/67/-5/0.04/000/00 33 NE AERO 36 NE RMY 33
07/19 89/61/75/+3/0.00/580/65 24 WSW AERO 26 SW RMY 25
07/20 93/75/84/+12/0.00/802/90 21 WSW AERO 22 WSW RMY N/A
07/21 92/76/84/+12/0.00/729/82 31 W AERO 35 W RMY 31
07/22 81/64/73/+1/1.22/284/32 35 ENE AERO 37 ENE RMY 34
07/23 66/58/62/-10/0.86/009/01 30 NNE AERO 33 NNE RMY 30
07/24 77/60/69/-3/0.01/575/65 14 NE AERO 15 NE RMY N/A
07/25 80/61/71/-1/0.00/732/83 17 SSE AERO 23 N RMY 17
07/26 84/62/73/+1/0.00/730/83 22 SSE AERO 23 SSE RMY 20
07/27 83/64/74/+2/0.00/834/95 21 S AERO 23 S RMY 21
07/28 89/64/77/+5/0.00/710/81 25 WSW AERO 36 WSW RMY 26
07/29 89/71/80/+8/0.01/804/92 23 W AERO 25 W RMY 21
07/30 93/71/82/+10/0.00/767/88 24 S AERO 24 S RMY 23
07/31 90/68/79/+7/0.55/548/63 37 SW AERO 35 SW RMY 38 TSTM
DAILY RECORDS FOR JULY 2019
7/20/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 73F SET IN 1977, 2015
7/21/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BREAKS PREVIOUS RECORD OF 75F SET IN 1991
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/…/.. 18 NNW AERO 20 NW RMY 17
8/02 83/61/72/0/0.00/…/.. 18 WSW AERO 18 WSW RMY 18
8/03 84/66/75/+3/0.00/…/.. 25 SW AERO 26 SW RMY 25
8/04 83/66/75/+3/0.00/…/.. 21 NE AERO 23 SW RMY 25
8/05 81/58/70/-2/0.00/…/.. 20 S AERO 18 S RMY 19
8/06 79/63/71/-1/0.00/…/.. 15 S AERO 14 S RMY 17
8/07 82/66/74/+2/…./…/.. 32 SSW AERO 35 SSW RMY 35
8/08 84/67/76/+4/…./…/.. 30 SW AERO 24 WNW RMY 29
8/09 82/63/73/+1/…./…/.. 28 NW AERO 25 NW RMY 26
8/10 78/59/69/-2/…./…/.. 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 Low temp since midnight is 61F; normal low is 62F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.47 INCHES IN 1926
PEAK GUST 45e MPH N IN 1951
RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962
TODAY’S REPORT PREPARED BY: Benjamin Turner
