Tuesday, September 3, 2019

| September 3, 2019 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, SEPTEMBER 3, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR IN THE MORNING WITH A LIGHT SEA BREEZE
IN THE AFTERNOON….

Weather conditions were fair with a visibility
just under 70 miles on average. Wind was light,
but shifted from N-E following the 1 P.M.
observation. Cloud cover increased since this
morning, becoming partly cloudy following noontime.
The high so far today is 76F, the same as the daily
normal maximum. The low since midnight is 61F, 2
degrees above the normal minimum of 59F.

PRELIMINARY STATS FOR AUGUST 2019

TEMPERATURE, Deg. F
Avg. Max. 80.4 [+1.2]
Avg. Min. 62.1 [+0.3]
Mean      71.5 [+1.0]
24-hour corrected mean: 70.5
Max. for month: 92F on the 19th
Min. for month: 51F on the 26th

COOLING DEGREE DAYS
Total cooling units:   211 [+22]
Total for the season:  619 [+82]
Total for last season: 753

PRECIPITATION, Inches
Total: 1.83 [-2.21]
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: N/A
Peak gust and direction: N/A

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus, few altocumulus
E-S and N
Temperature: 62F; Dew Point: 61F; Wind: NW at 9 kts
Sea-level pressure: 30.03 ins. Hg, rising steadily
Visibility: 65 miles
6-hr Max temp: 66F
6-hr Min temp: 61F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 65 171/62/61/3309/003/ FEW SC ALQDS
FEW AC DSNT E-S AND N/ 8/730 70037 51025 10066 20061

10 A.M.
Weather: Clear, few stratocumulus
Temperature: 72F; Dew Point: 61F; Wind: NE at 6 kts,
Wind: Light
Sea-level pressure: 30.06 ins. Hg, falling then rising
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 65 180/72/61/0406/006/ FEW SC ALQDS
WND LGT/ 8/700 50009

1 P.M.
Weather: Scattered cumulus
Temperature: 75F; Dew Point: 58F; Wind: N at 5 kts,
Wind: Light
Sea-level pressure: 30.04 ins. Hg, falling steadily
Visibility: 70 miles
6-hr Max temp: 76F
6-hr Min temp: 62F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 70 175/75/58/0105/004/ FEW CU ALQDS WND
LGT/ 8/100 58005 10076 20062

SUMMARY FOR MONDAY, SEPTEMBER 2, 2019

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..76
MIN…..57   NORMAL…..59
MEAN….66   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL………………….-2
TOTAL DEPARTURE FOR THE MONTH………………….-5 [-2.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………1   DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH……………1   DEPARTURE………-7
TOTAL COOLING UNITS FOR THE SEASON…………620   DEPARTURE……..+75
TOTAL COOLING UNITS LAST SEASON TO DATE…….762   DEPARTURE…….-142

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..39 W   AT  5:48 P.M.
AERO…………………….41 W   AT  5:52 P.M.
ASOS…………………….39 SW  AT  5:58 P.M.
DAVIS……………………40 S   AT  5:51 P.M. RMY 41
FASTEST MILE FOR YESTERDAY………………….26 W   AT  5:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….25 SSW AT  5:53 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………26 S   AT  5:45 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.9 S
ASOS…………………..10.9
DAVIS………………….10.9 SSW [193 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.37  DEPARTURE……+0.26
ASOS…………..0.36
TOTAL PRECIPITATION FOR THE MONTH……….0.37  DEPARTURE……+0.15
ASOS…………..0.36
TOTAL PRECIPITATION FOR THE YEAR……….37.52  DEPARTURE……+2.27
ASOS………….37.40

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/…./720/85               32 NW  AERO 28 NW  RMY 28
8/11  78/55/67/-4/0.00/734/87               28 W   AERO 25 W   RMY 28
8/12  82/60/71/0/0.00/749/89                25 W   AERO 23 W   RMY 26
8/13  77/66/72/+1/0.02/059/07               25 W   AERO 24 WSW RMY 24
8/14  75/62/69/-2/…./452/54               24 ENE AERO 22 ENE RMY 22
8/15  77/59/68/-3/…./568/68               17 ESE AERO 15 SSE RMY 16
8/16  78/61/70/-1/…./732/88               20 E   AERO 17 ESE RMY 18
8/17  78/67/73/+2/…./099/12               14 SE  AERO 15 SE  RMY 15
8/18  88/70/79/+8/…./529/64               18 SSW AERO 18 SSW RMY 21
8/19  92/69/81/+11/…./…/..              25 WSW AERO 23 WSW RMY 25
8/20  87/66/77/+7/…./…/..               18 W   AERO 14 WSW RMY N/A
8/21  85/68/77/+7/0.12/…/..               33 SW  AERO 32 SW  RMY 33
8/22  88/68/78/+8/0.00/…/..               25 W   AERO 21 W   RMY 26
8/23  78/60/69/-1/0.04/…/..               23 N   AERO 18 N   RMY 24
8/24  72/55/64/-6/0.00/…/..               25 ENE AERO 21 ENE RMY 22
8/25  66/56/61/-8/0.00/…/..               31 ENE AERO 25 ENE RMY 29
8/26  71/51/61/-8/0.00/…/..               25 NE  AERO 21 NE  RMY 25
8/27  77/54/66/-3/0.00/…/..               18 SSW AERO 18 SSW RMY 17
8/28  78/59/69/0/…./…/..                21 SSE AERO 18 SSE RMY 20
8/29  83/63/73/+4/…./…/..               25 WNW AERO 21 WNW RMY 26
8/30  84/59/72/+4/…./…/..               30 SW  AERO 30 SW  RMY 28
8/31  79/61/70/+2/…./…/..               21 W   AERO 18 W   RMY 20

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

9/01  73/56/65/-3/0.00/…/..                21 ENE AERO 14 ENE RMY 18
9/02  75/57/66/-2/0.37/…/..                39 W   AERO 41 W   RMY 41

9/03 Low temp since midnight is 61F; normal low is 59F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1983
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)

RECORDS FOR SEPTEMBER 4
HIGH 90F IN 1953, 1973
LOW 46F IN 1987
PRECIP 3.22 INCHES IN 1922
PEAK GUST 47 MPH SE IN 1966

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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