Saturday, August 17, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 17, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
BEAUTIFUL SUMMER WEATHER CONTINUES…
It has been another nice day on the summit today. The morning low
temperature of 59F was a little warmer than the day before, but the
dew point is holding in the middle 50s today. The sky was nearly
free of clouds this morning, though a veil of thin cirrus clouds
have advanced into the area by late morning. Cumulus and a few
moderate cumulus are building inland away from the coast at mid-day.
The wind direction has gradually veered from W at midnight through
N to ENE during the morning, though the wind speed has remained
light all day. The barometric pressure near 30.30 inches today is
the highest of the month so far.
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, few lower cirrus, hazy
Temperature: 63F; Dew Point: 55F; Wind: N at 9 kts
Sea-level pressure: 30.27 ins. Hg, rising
Visibility: 40 miles, hazy
6-hr min. temp: 59F
BHO SA 1155 250 –SCT 40 249/63/55/3509/027/ FEW LWR CI HAZY/ 8/001
51012 10063 20059
10 A.M.
Weather: Thin broken cirrus, few cumulus building distant W-NW,
wind gradually veering, hazy
Temperature: 73F; Dew Point: 56F; Wind: ENE at 8 kts,
Wind: Direction variable NNE-E
Sea-level pressure: 30.30 ins. Hg, rising
Visibility: 40 miles, hazy
BHO SA 1455 250 –BKN 40 260/73/56/0608/030/ FEW CU BLDG DSNT W-NW
WND 03V09 WND GRDLY VEERING HAZY/ 8/101 53011
1 P.M.
Weather: Thin broken cirrus, cumulus SSE-N, few moderate cumulus,
few lower and higher cirrus, hazy
Temperature: 74F; Dew Point: 55F; Wind: E at 8 kts
Sea-level pressure: 30.29 ins. Hg, falling slightly
Visibility: 40 miles, hazy
6-hr max. temp: 75F
BHO SA 1755 250 –BKN 40 256/74/55/0808/029/ CU SSE-N FEW MDT CU
FEW LWR CI FEW HIR CI HAZY/ 8/201 58004 10075 20063
WEATHER SUMMARY FOR FRIDAY, AUGUST 16, 2013
TEMPERATURE (DEGREES F)
MAX…..77 NORMAL…..79
MIN…..57 NORMAL…..62
MEAN….67 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL…………………..-4
TOTAL DEPARTURE FOR THE MONTH………………….-42 [-2.8 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….2 DEPARTURE………-4
TOTAL COOLING UNITS FOR THE MONTH…………65 DEPARTURE……..-44
TOTAL COOLING UNITS FOR THE SEASON……….548 DEPARTURE……..+88
TOTAL COOLING UNITS LAST SEASON TO DATE…..622 DIFFERENCE…….-74
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………….20 W AT 10:17 A.M.
AERO…………………19 W AT 10:53 A.M.
ASOS…………………21 WSW AT 10:53 A.M.
DAVIS………………..20 W AT N/A RMY 21
FASTEST MILE FOR YESTERDAY………………16 W AT 10:06 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………16 W AT 10:06 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………..16 W AT N/A
AVERAGE WIND SPEED AND DIRECTION……….10.5 W
ASOS………………..9.8
DAVIS……………….8.9 WSW [252 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……….2.55 DEPARTURE…………+0.32
ASOS…………..2.60
TOTAL PRECIPITATION FOR THE YEAR……….37.84 DEPARTURE…………+4.62
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 75/53/64/-7/0.00/…/.. 23 W AERO 23 MPH W RMY 24
8/16 77/57/67/-4/0.00/…/.. 20 W AERO 19 MPH W RMY 21
8/17 morning low temp: 59F; 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 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
RECORDS FOR AUGUST 18
HIGH 93F IN 2002
LOW 47F IN 1824
PRECIP 5.75 INCHES IN 1955 [DIANE]
PEAK GUST 46 MPH WNW IN 2007
TODAY’S REPORT PREPARED BY: Mike Iacono
