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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 10, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
HEAVY RAIN FRIDAY LEAVES OVER TWO INCHES OF RAIN
WARMER AND MUCH DRIER TODAY
Rainfall yesterday began around 7AM, and continued for much of the day. The
rain was heavy at times in the afternoon, and like many nearby locations
over two inches of rain were recorded at the summit, with 2.21 inches being
the final total. This was not enough to break the daily rainfall record for
the date, which is 2.65 inches set in 1976. The rainfall deficit for this
month has now been replaced by a surplus of over one inch. The wind was
gusty at times out of the south yesterday, with a peak wind of 37mph just
after noon. This was our highest wind gust in over a month. The
temperature moved very little during the day, with a high of 73F and a low
of 69F.
The rain is gone today, as calm weather has returned. The sky has been
partly cloudy throughout the day and the temperature has been climbing, up
to 80F by early afternoon, which is the average for the date, though it will
likely rise higher. The wind has been a little lighter today, but has still
gusted over 25mph at times out of the W-NW. This wind direction has helped
to dry the air out today, keeping the humidity low and making for a very
nice summer day.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, scattered cirrus (2 levels), few altocumulus
lenticularis WWN-NW, higher cirrus layer partly thin, thin smoke layer S-NW
Temperature: 67F; Dew Point: 64F; Wind: WNW at 10G17 kts
Sea-level pressure: 29.90 ins. Hg, rising
Visibility: 45 miles, distant haze
6-hr min. temp: 66F
24-hr precip: 2.21 ins.
BHO SA 1155 100 SCT 220 SCT 250 SCT 45 125/67/64/3010G17/990/
FEW ACSL WNW-NW HIER CI LYR PRTLY THN DSNT HZ THN K LYR S-NW/ 8/041
MANUAL 70221 ASOS 70227 52017 10071 20066
10 A.M.
Weather: Scattered cirrus, few altocumulus, few higher cirrus
Temperature: 76F; Dew Point: 63F; Wind: WNW at 11G17 kts,
Wind: Direction variable W-NNW
Sea-level pressure: 29.91 ins. Hg, increasing then decreasing
Visibility: 50 miles, light distant haze
BHO SA 1455 220 SCT 50 129/76/63/2911G17/991/ FEW AC FEW HIER CI
LGT DSNT HZ WND 26V33/ 8/088 50004
1 P.M.
Weather: Scattered cumulus, scattered cirrus (2 levels), few altocumulus
overhead and SW, few altocumulus lenticularis SE-S
Temperature: 80F; Dew Point: 60F; Wind: WNW at 11G19 kts
Sea-level pressure: 29.91 ins. Hg, decreasing then increasing
Visibility: 50 miles, light distant haze
6-hr max. temp: 80F
BHO SA 1755 50 SCT 220 SCT 250 SCT 50 130/80/60/2911G19/991/
FEW AC OVHD AND SW FEW ACSL SE-S LGT DSNT HZ WND 26V33/ 8/141
53001 10080 20067
WEATHER SUMMARY FOR FRIDAY, AUGUST 9, 2013
TEMPERATURE (DEGREES F)
MAX…..73 NORMAL…..80
MIN…..69 NORMAL…..63
MEAN….71 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………….-1
TOTAL DEPARTURE FOR THE MONTH………………-21 [-2.5 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….6 DEPARTURE………-1
TOTAL COOLING UNITS FOR THE MONTH…………42 DEPARTURE……..-22
TOTAL COOLING UNITS FOR THE SEASON……….525 DEPARTURE…….+110
TOTAL COOLING UNITS LAST SEASON TO DATE…..552 DIFFERENCE…….-27
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………….37 S AT 12:02 P.M.
AERO…………………39 S AT 12:02 P.M.
ASOS…………………40 S AT 12:02 P.M.
DAVIS………………..36 S AT 12:02 P.M. RMY 40
FASTEST MILE FOR YESTERDAY………………28 SSW AT 4:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………28 SSW AT 4:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………..26 S AT 4:01 P.M.
AVERAGE WIND SPEED AND DIRECTION………. 16.1 S
ASOS………………..14.5
DAVIS……………….15.0 S [193 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….2.21 DEPARTURE…………+2.07
ASOS…………..2.27
TOTAL PRECIPITATION FOR THE MONTH……….2.53 DEPARTURE…………+1.21
ASOS…………..2.59
TOTAL PRECIPITATION FOR THE YEAR……….37.82 DEPARTURE…………+5.51
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 morning low 66F, 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 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976
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
TODAY’S REPORT PREPARED BY: Jonathan O’Brien
