Sunday, August 11, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, AUGUST 11, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNNY AND CALM WITH EXCELLENT VISIBILITY TODAY
It has been another very nice summer day at the summit today. After a cool
morning low of 58F, the temperature has climbed slowly today, reaching a
high of 77F by the 1PM observation. The prevailing W-NW wind has
continued to push drier air into the region, keeping the dew points in the
low 50s, which has helped make today’s air very refreshing. The wind has
been light today, with no gusts over 20mph observed so far. The visibility
has also been excellent today, as high as 80 miles early this morning,
though it has decreased a little during the day. The sky has been mostly
clear throughout the day, with just a few cumulus and stratocumulus clouds
forming late this morning through early afternoon.
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant SE-SSE
Temperature: 63F; Dew Point: 53F; Wind: W at 6 kts
Sea-level pressure: 30.10 ins. Hg, rising then steady
Visibility: 80 miles
6-hr min. temp: 58F
BHO SA 1155 CLR 80 194/63/53/2806/010/ FEW SC DSNT SE-SSE/ 8/500 51007
10063 20058
10 A.M.
Weather: Clear, few stratocumulus, few small cumulus and cumulus fractus,
thin smoke layer aloft SW-W
Temperature: 72F; Dew Point: 52F; Wind: WNW at 6 kts,
Wind: Direction variable W-NNW
Sea-level pressure: 30.10 ins. Hg, steady then falling slightly
Visibility: 75 miles
BHO SA 1455 CLR 75 193/72/52/2906/010/ FEW SC FEW SML CU AND CUFRA
THN K LYR ALF SW-W WND 27V33/ 8/800 58001
1 P.M.
Weather: Clear, few stratocumulus, few small cumulus and cumulus fractus
Temperature: 75F; Dew Point: 52F; Wind: Estimated WNW at 5 kts,
Wind: Light and variable
Sea-level pressure: 30.06 ins. Hg, falling
Visibility: 70 miles
6-hr max. temp: 77F
BHO SA 1755 70 181/75/52/E2905/006/ FEW SC FEW SML CU AND CUFRA
WND LGT AND VRB/ 8/800 58012 10077 20063
WEATHER SUMMARY FOR SATURDAY, AUGUST 10, 2013
TEMPERATURE (DEGREES F)
MAX…..81 NORMAL…..80
MIN…..61 NORMAL…..63
MEAN….71 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL……………….0
TOTAL DEPARTURE FOR THE MONTH………………-21 [-2.3 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….6 DEPARTURE………-1
TOTAL COOLING UNITS FOR THE MONTH…………48 DEPARTURE……..-23
TOTAL COOLING UNITS FOR THE SEASON……….531 DEPARTURE…….+109
TOTAL COOLING UNITS LAST SEASON TO DATE…..564 DIFFERENCE…….-33
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………….30 WNW AT 11:51 A.M. *
AERO…………………31 WNW AT 11:51 A.M.
ASOS…………………32 WNW AT 11:51 A.M.
DAVIS………………..29 W AT 11:49 A.M. RMY 31
FASTEST MILE FOR YESTERDAY………………26 WNW AT 11:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………25 W AT 11:52 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………..22 W AT 11:52 A.M.
AVERAGE WIND SPEED AND DIRECTION………. 13.5 WNW
ASOS………………..13.2
DAVIS……………….11.5 W [279 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……….2.53 DEPARTURE…………+1.08
ASOS…………..2.59
TOTAL PRECIPITATION FOR THE YEAR……….37.82 DEPARTURE…………+5.38
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/…/.. 26 WNW AERO 25 MPH WNW RMY 27
8/6 78/56/67/-5/0.00/…/.. 17 ESE AERO 15 MPH S RMY 16
8/7 80/59/70/-2/0.00/…/.. 21 S AERO 21 MPH S RMY N/A
8/8 79/62/71/-1/0.08/…/.. 25 S AERO 25 MPH S RMY N/A
8/9 73/69/71/-1/2.21/000/00 37 S AERO 39 MPH S RMY 40
8/10 81/61/71/-1/0.00/…/.. 30 WNW AERO 31 MPH WNW RMY 31
8/11 morning low 58F, normal low: 63F
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 11
HIGH 97F IN 1944
LOW 49F IN 1972
PRECIP 3.13 INCHES IN 1990
PEAK GUST 44 MPH SW IN 1971
RECORDS FOR AUGUST 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983
TODAY’S REPORT PREPARED BY: Jonathan O’Brien
