Thursday, August 15, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 15, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

ABNORMALLY COOL AUGUST TEMPERATURES CONTINUE
LOWEST TEMPERATURE (53F) SINCE 53f JUNE 20 WAS
RECORDED HERE AT THE SUMMIT AS COOL AUGUST CONTINUES
LOW READINGS IN THE 40’S IN LOCAL AREA THIS MORNING

Some chilly minimum temperatures early this morning
included: Boston, 60F; Blue Hill, 53F; Norwood Airport, 47F;
Taunton Airport, 48F; Martha’s Vineyard Airport, 48F,
and Worcester Airport, 52F.

After averaging a much below normal 65 degrees here on
the summit yesterday, 6 degrees below normal, August
is currently running 2.4 degrees cooler than average.
Through August 11 this has been a sunny month with
66% of the possible sunshine.

Interestingly, Monday of this week continues to be the
only day since July 29 that the average daily temperature
actually finished above the 30-year normal
for any given date.

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant SSE-SSW along the horizon
Temperature: 60F; Dew Point: 51F; Wind: WNW at 8 kts.
Sea-level pressure: 30.09 ins. Hg, rising then more slowly
Visibility: 80 miles
6-hr min. temp: 53F
BHO SA 1155 CLR 80 188/60/51/3008/009/ FEW CI DSNT SSE-SSW ALG HRZN/
8/001 51018 10060 20053

10 A.M.
Weather: Clear, cumulus fractus and cumulus forming, cirrus distant
SE-SSW
Temperature: 70F; Dew Point: 49F; Wind: WNW at 7 kts,
Wind: Direction variable WSW-NW
Sea-level pressure: 30.10 ins. Hg, rising slightly
Visibility: 75 miles, light distant haze
BHO SA 1455 CLR 75 193/70/49/2907/010/ CUFRA/CU FRMG ALQDS
CI DSNT SE-SSW LGT DSNT HZ WND 24V32/ 8/101 53005

1 P.M.
Weather: Scattered cumulus, stratocumulus cumulogenitus,
scattered cirrus (SE-SW
Temperature: 73F; Dew Point: 51F; Wind: W at 10 kts,
Wind: Direction variable SW-NW
Sea-level pressure: 30.07 ins. Hg, falling
Visibility: 75 miles, light distant haze
6-hr max. temp: 75F
BHO SA 1755 60 SCT 250 SCT 75 183/73/51/2810/007/ CU/SCCU ALQDS CI
SE-SW WND 23V31/ 8/401 57010 10075 20060

WEATHER SUMMARY FOR WEDNESDAY, AUGUST 14, 2013

TEMPERATURE (DEGREES F)
MAX…..73     NORMAL…..80
MIN…..57     NORMAL…..62
MEAN….65     NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL…………………..-6
TOTAL DEPARTURE FOR THE MONTH………………,…-31  [-2.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….0    DEPARTURE………-6
TOTAL COOLING UNITS FOR THE MONTH…………63    DEPARTURE……..-34
TOTAL COOLING UNITS FOR THE SEASON……….546    DEPARTURE……..+98
TOTAL COOLING UNITS LAST SEASON TO DATE…..606    DIFFERENCE…….-60

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………….35 W   AT  3:36 P.M.
AERO…………………35 W   AT  3:36 P.M. *
ASOS…………………36 W   AT  3:36 P.M.
DAVIS………………..34 WNW AT  3:36 P.M. RMY 35
FASTEST MILE FOR YESTERDAY………………26 WNW AT  1:39 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………25 W   AT 12:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………..23 WNW AT  1:39 P.M.
AVERAGE WIND SPEED AND DIRECTION……….14.5 WNW
ASOS……………….12.8
DAVIS………………12.4 W [280 deg.] * last of several occurrences…

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……….2.55   DEPARTURE…………+0.58
ASOS…………..2.60
TOTAL PRECIPITATION FOR THE YEAR……….37.84   DEPARTURE…………+4.88
ASOS…………..N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

8/1  81/62/72/0/0.01/503/58          25 S   AERO 26 MPH S   RMY 27
8/2  81/62/72/0/0.23/518/60          26 W   AERO 26 MPH W   RMY 28
8/3  77/63/70/-2/T/276/32            22 WSW AERO 23 MPH WSW RMY 23
8/4  79/58/69/-3/T/645/75            25 WNW AERO 21 MPH WNW RMY 26
8/5  75/54/65/-7/0.00/858/100        26 WNW AERO 25 MPH WNW RMY 27
8/6  78/56/67/-5/0.00/846/99         17 ESE AERO 15 MPH S   RMY 16
8/7  80/59/70/-2/0.00/759/89         21 S   AERO 21 MPH S   RMY N/A
8/8  79/62/71/-1/0.08/153/18         25 S   AERO 25 MPH S   RMY N/A
8/9  73/70/72/0/2.21/000/00          37 S   AERO 39 MPH S   RMY 40
8/10 81/61/71/-1/0.00/795/94         30 WNW AERO 31 MPH WNW RMY 31
8/11 78/58/68/-3/0.00/835/99         18 W   AERO 18 MPH W   RMY 21
8/12 81/62/72/+1/0.00/…/..         18 W   AERO 17 MPH WSW RMY 19
8/13 73/64/69/-2/0.02/…/..         16 SSE AERO 15 MPH SSE RMY N/A
8/14 73/57/65/-6/0.00/…/..         35 W   AERO 35 MPH W   RMY 35

8/15 morning low temp: 53F; the normal low is now 62F

DAILY RECORDS FOR AUGUST 2013
None so far.

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

RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011
PEAK GUST 44e MPH S IN 1941

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

TODAY’S REPORT PREPARED BY: Robert Skilling