Friday, September 2, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, SEPTEMBER 2, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

SEASONABLE AND PLEASANT WEATHER RETURNS FOR THE FIRST PART OF
LABOR DAY WEEKEND

Sunny skies and dry weather dominated today due to high pressure
returning to the area.  Temperatures were more seasonable and reached
a max. of 75F by the 1:00PM EST observation.  While yesterday’s precip.
was much needed, the total daily of 0.09 in. barely made a dent in the
approximate 10 in. deficit for the year.  Boston and the surrounding
areas are still in an extreme, long-term drought.

PRELIMINARY STATS FOR AUGUST 2016

TEMPERATURE, Deg. F
Avg. Max. 85.1 [+5.9] Avg. Min. 65.0 [+3.2] Mean      75.1 [+4.6] 24-hour corrected mean: 74.1
Max. for month: 95F on 12th
Min. for month: 54F on 23rd

HEATING DEGREE DAYS
Total heating units: 0 [-16] Total for the season: 10 [-15] Total for last season: 1

COOLING DEGREE DAYS
Total cooling units: 318 [+132] Total for the season: 792 [+255] Total for last season: 666

PRECIPITATION, Inches
Total: 1.78 [-2.25] Greatest in 24 hrs: 0.55 in. on 13th and 14th

WIND, mph
Avg. uncorrected wind speed: 10.3
Avg. corrected wind speed: 10.8
Prevailing wind direction: SSW at 14%
Peak gust and direction: 40 SSW on 14th

SUNSHINE:
Campbell-Stokes card minutes: 17460 mins. of possible 24780 or 70%
Astronomical total minutes: 18130 mins. of possible 25714 or 71%

The 24-hour corrected mean temperature for August of 74.1 deg F breaks
the previous record of 72.6 deg F set in 2012 for the warmest August.
August 2016 was 1.5 deg F warmer than the second warmest August on record
while previous records were all within 0.1-0.2 deg F of each other. The
average maximum and minimum temperatures for August 2016 are also new records.
The previous high average max was 83.2 deg F set in August 2005; the previous
high average min was 64.9 deg F set in August 2001.

Summer 2016 was also the warmest summer on record with an average temperature
of 71.6 deg F.  This breaks the previous record of 71.3 deg F set in 2012.
Even with the extreme drought in the Boston area, summer 2016 only ranks as
third driest.

BHO Warmest Augusts, deg F (1885-2016):

1) 74.1 in 2016
2) 72.6 in 2012
3) 72.5 in 1988
4) 72.4 in 2015
5) 72.3 in 2005
6) 72.1 in 2002

BHO Warmest Summers (Jun-Aug), deg F (1885-2016):

1) 71.6 in 2016
2) 71.3 in 2010
3) 70.8 in 1949
4) 70.6 in 1999
5) 70.4 in 1952
6) 70.2 in 2005

BHO Driest Summers (Jun-Aug), inches (1885-2016):

1) 3.48 in 1949
2) 3.54 in 1957
3) 4.90 in 2016
4) 5.24 in 1965
5) 5.43 in 1964
6) 5.45 in 1997

7 A.M.
Weather: Few cumulus SW-E, few cirrostratus in all directions
Temperature: 63F; Dew Point: 54F; Wind: NNW at 9 kts
Sea-level pressure: 30.01 ins. Hg, rising, then less quickly
Visibility: 70 miles
6-hr Max temp: 63F
6-hr Min temp: 58F
24-hr precip: 0.07 in.
BHO SA 1155 CLR 70 164/63/54/3409/001/ FEW CU SW-E FEW CS ALQDS/
8/105 51017 MANUAL 70007 ASOS 70008 10063 20058

10 A.M.
Weather: Scattered cumulus, few cirrostratus NE-SSW
Temperature: 74F; Dew Point: 55F; Wind: ENE at 9G15 kts
Sea-level pressure: 30.06 ins. Hg, rising, then less quickly
Visibility: 70 miles
BHO SA 1455 44 SCT 70 178/74/55/0609G15/006/ FEW CS NE-SSW/
8/105 51014

1 P.M.
Weather: Scattered cumulus, few cirrus in all directions
Temperature: 75F; Dew Point: 55F; Wind: E at 8 kts
Sea-level pressure: 30.08 ins. Hg, rising, then falling
Visibility: 70 miles
6-hr Max temp: 75F
6-hr Min temp: 63F
BHO SA 1755 34 SCT 70 187/75/55/0908/008/ FEW CI ALQDS/ 8/101
51009 10075
20063

SUMMARY FOR THURSDAY, SEPTEMBER 1, 2016

TEMPERATURE (DEGREES F)
MAX…..72   NORMAL…..76
MIN…..64   NORMAL…..59
MEAN….68   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL…………………….0
TOTAL DEPARTURE FOR THE MONTH…………………….0 [0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………3   DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH……………3   DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE SEASON…………795   DEPARTURE……..+254
TOTAL COOLING UNITS LAST SEASON TO DATE…….674   DIFFERENCE…….+121

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 NNW AT 10:04 P.M.
AEROVANE………………..16 NNW AT 10:05 P.M.
ASOS……………………21 NNW AT 10:05 P.M.
DAVIS…………………..1P NNW AT 10:05 P.M. RMY 20
FASTEST MILE FOR YESTERDAY…………………13 NW  AT 11:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 NNW AT 11:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 WSW AT  2:45 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.8 WSW
ASOS…………………..7.3
DAVIS………………….6.3 WSW [250 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.07  DEPARTURE……-0.04
ASOS…………..0.08
TOTAL PRECIPITATION FOR THE MONTH……….0.09  DEPARTURE……-0.02
ASOS…………..0.10
TOTAL PRECIPITATION FOR THE YEAR……….25.06  DEPARTURE…..-10.07
ASOS………….25.37

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

8/1  75/65/70/-2/0.02/320/37                 21 NE  AERO 20 ENE RMY 20
8/2  71/63/67/-5/0.12/000/00                 16 ENE AERO 16 ENE RMY 16
8/3  81/60/71/-1/0.00/603/70                 18 S   AERO 16 S   RMY 17
8/4  86/61/74/+2/0.00/833/97                 23 S   AERO 22 S   RMY 17
8/5  87/61/74/+2/0.00/823/96                 29 S   AERO 29 S   RMY 30
8/6  88/67/78/+6/T/419/49                    24 SSW AERO 23 SSW RMY 23
8/7  89/65/77/+5/0.00/784/92                 26 WNW AERO 25 WNW RMY 26
8/8  87/63/75/+3/0.00/816/96                 23 W   AERO 21 W   RMY 22
8/9  90/65/78/+6/0.00/789/93                 25 SSW AERO 24 SSW RMY 25
8/10 76/66/71/+0/0.28/017/02                 30 SSW AERO 31 SSW RMY 33
8/11 93/73/83/+12/T/666/79                   22 SSW AERO 21 SSW RMY 22
8/12 95/74/85/+14/0.00/487/58                30 SW  AER0 30 SW  RMY 31
8/13 78/67/73/+1/0.16/201/24                 25 NNW AERO 36 NNW RMY N/A TSTM
8/14 94/69/82/+11/0.39/701/84                39 SSW AERO 40 SSW RMY N/A TSTM
8/15 89/68/79/+8/0.00/758/91                 25 W   AERO 24 W   RMY 28
8/16 83/69/76/+5/0.02/125/15                 31 S   AERO 30 S   RMY N/A
8/17 84/68/76/+5/0.00/679/82                 38 W*  AERO 35 W   RMY 39
8/18 89/65/77/+6/T/635/77                    22 SW  AERO 20 SW  RMY 21
8/19 86/68/77/+7/0.00/674/82                 17 S   AERO 16 SSE RMY 17
8/20 86/65/76/+6/0.00/754/92                 25 S   AERO 23 S   RMY 25
8/21 87/62/75/+5/0.54/727/89                 25 S   AERO 22 SSE RMY N/A
8/22 78/59/69/-1/0.00/774/95                 31 NW  AERO 29 NW  RMY 32
8/23 80/54/67/-3/0.00/796/98                 23 WSW AERO 21 WSW RMY 23
8/24 87/62/75/+5/0.00/809/100                22 W   AERO 18 W   RMY 20
8/25 86/65/76/+7/0.00/629/78                 28 SW  AERO 23 SW  RMY 27
8/26 88/70/79/+9/0.25/458/57                 23 W   AER0 17 W   RMY 21
8/27 86/66/76/+7/0.00/761/95                 14 SE  AERO 12 SE  RMY 15
8/28 86/66/76/+7/0.00/718/90                 25 SSE AERO 20 SSE RMY 27
8/29 89/65/77/+8/0.00/589/74                 28 WNW AERO 23 W   RMY 29
8/30 83/59/71/+3/0.00/785/99                 18 S*  AERO 14 SW  RMY N/A
8/31 80/65/73/+5/T/000/00                    21 SW  AERO 16 SW  RMY 20

DAILY RECORDS FOR AUGUST 2016

8/11/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
TIES PREVIOUS RECORD SET IN 1900 AND 1988

8/12/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
TIES PREVIOUS RECORD SET IN 1988

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

9/1  72/64/68/0/0.09/…/..                  21 NNW AERO 16 NNW RMY 20
9/2  Low temp since midnight is 68F; normal low is now 59F

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

RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944

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)

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell