Thursday, July 17, 2014
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 17, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
HEAVY RAIN INCLUDING THUNDERSTORMS BROUGHT AN INCH OF
RAINFALL YESTERDAY…
TEMPERATURES HELD DOWN TO A HIGH OF 73F IN HEAVILY OVERCAST
AND FOGGY CONDITIONS…
CIRRUS CLOUDS SLOW TO MOVE EASTWARD IN THE WAKE OF COLD FRONTAL
PASSAGE EARLY TODAY
A final total of 0.97 inch was the rainfall total recorded
for yesterday which brought the three day total to 1.55 ins.
Much drier air is in place today with dew points falling
into the 50’s after being in the 70’s for at least a couple
of days. Temperatures were also in the low 70’s yesterday
making for very high relative humidity all day and the
result was oppressive conditions.
High cirrus cloudiness is showing a very slow tendency to
clear away, but early this afternoon the advancing edge of
clear sky was still just to our west.
Today’s Observations:
7 A.M.
Weather: Scattered altostratus/altocumulus, overcast dense cirrus,
altostratus, few altocumulus layer ENE-SSW receding, dense cirrus
with thin spots in overcast overhead, break in overcast/line of
clearing extending WSW-NW
Temperature: 64F; Dew Point: 59F; Wind: NW at 9 kts
Sea-level pressure: 29.94 ins. Hg, rising, then more slowly
Visibility: 50 miles, except NE 25 miles, hazy, W-NW 70 miles,
distant haze
6-hr max temp: 65F
6-hr min temp: 62F
24-hr precip: 0.97 inch
BHO SA 1155 170 SCT E220 OVC 50 140/64/59/3209/994/ AS/FEW LWR AC LYR XTDNG
ENE-SSW RCDNG DNS CI ALQDS PTLY THN OVHD BINOVC/LINE OF CLRG XTDNG WSW-NW
VSBY NE 25 HAZY W-NW 70 LGT DSNT HZ/ 8/072 51016 MANUAL 70097 ASOS 70096
10065 20062
10 A.M.
Weather: Scattered dense cirrus, thin overcast cirrus, few cumulus/moderate
cumulus forming near horizon distant WNW, few altocumulus and altocumulus
lenticularis distant E-SE, break in overcast/line of clearing extending
WSW-NNW
Temperature: 72F; Dew Point: 59F; Wind: N at 3 kts,
Wind: Light
Sea-level pressure: 29.97 ins. Hg, rising slightly
Visibility: 50 miles, NE 30 miles, hazy, W-NW 55 miles, distant haze
BHO SA 1455 220 SCT 250 -OVC 50 148/72/59/3503/997/ FEW CU/MDT CU FRMG
DSNT WNW ALG HRZN FEW AC/ACSL DSNT E-SE BINOVC/LINE OF CLRG XTDNG WSW-NW
VSBY W-NW 55 DSNT HZ NE 30 HAZY WND LGT/8/242 51008
1 P.M.
Weather: Broken dense cirrus, broken cirrus, cumulus forming
distant SE-SW-NW and vicinity N-NE few moderate, few altocumulus
lenticularis distant E-SE, dense cirrus all quadrants, line
of clearing WSW-N
Temperature: 76F; Dew Point: 55F; Wind: W at 4 kts,
Wind: Light
Sea-level pressure: 29.98 ins. Hg, rising then falling slightly
Visibility: 55 miles, distant haze, NE 30 miles, hazy,
NW 70 miles, distant haze
6-hr max temp: 77F
6-hr min temp: 64F
BHO SA 1755 E220 BKN 250 BKN 55 151/76/55/2804/998/ CU FRMG DSNT SE-SW-NW
AND VC N-NNE FEW MDT FEW ACSL DSNT E-SE DNS CI ALQDS LINE OF CLRG WSW-N
VSBY NE 30 HAZY NW 70 DSNT HZ WND LGT/ 8/242 50003 10077 20064
WEATHER SUMMARY FOR WEDNESDAY, JULY 16, 2014
TEMPERATURE (DEGREES F)
MAX…..73 NORMAL…..81
MIN…..65 NORMAL…..63
MEAN….69 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………+39 [+2.2 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….,4 DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………142 DEPARTURE………+35
TOTAL COOLING UNITS FOR THE SEASON………..251 DEPARTURE………+15
TOTAL COOLING UNITS LAST SEASON TO DATE……335 DIFFERENCE……..-84
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………27 SSW AT 8:32 A.M.
ASOS…………………..32 SSW AT 8:32 A.M.
DAVIS………………….30 SSW AT 8:32 A.M. RMY 32
FASTEST MILE FOR YESTERDAY………………..22 SSW AT 8:32 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..23 SSW AT 8:32 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….22 SSW AT 8:32 A.M.
AVERAGE WIND SPEED AND DIRECTION………….10.7 S
ASOS………………….10.6
DAVIS………………….9.8 SSW [200 deg]
.
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.97 DEPARTURE……….+0.84
ASOS…………..0.96
TOTAL PRECIPITATION FOR THE MONTH……….4.35 DEPARTURE……….+1.45
ASOS…………..4.32
TOTAL PRECIPITATION FOR THE YEAR……….28.90 DEPARTURE……….-0.97
ASOS………….28.83
PRELIMINARY CLIMATE SUMMARY FOR JULY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
7/1 85/66/76/+6/0.00/695/76 31 SSW RMY 36
7/2 89/69/79/+9/T/639/70 33 SSW RMY 38
7/3 91/68/80/+9/0.05/611/67 29 W RMY 30 TSTM
7/4 72/61/67/-4/2.48/027/03 28 N RMY N/A TSTM
7/5 77/55/66/-5/0.27/738/81 36 NW RMY N/A
7/6 83/61/72/+1/0.00/892/98 29 SW RMY 33
7/7 85/65/75/+4/T/563/62 33 SW RMY 38 TSTM [NO RAIN]
7/8 89/70/80/+8/0.00/763/84 31 SW RMY 38
7/9 86/70/78/+6/0.00/779/86 28 SSW RMY N/A
7/10 80/65/73/+1/0.00/…/.. 16 NW RMY N/A
7/11 76/62/69/-3/0.00/…/.. 22 NE RMY N/A
7/12 85/60/73/+1/0.00/…/.. 21 S RMY 25
7/13 82/64/73/+1/…./…/.. 31 S RMY 35
7/14 83/69/76/+4/…./…/.. 25 S RMY 27
7/15 82/70/76/+4/…./…/.. 26 S RMY 29 TSTM
7/16 73/65/69/-3/0.97/000/00 27 SSW RMY 32 TSTM
7/17 morning low of 62F; the normal low is now 63F
DAILY RECORDS FOR JULY 2014
7/4- NEW DAILY RECORD RAINFALL OF 2.48 ins;
surpasses previous record of 1.78 ins. in 1950
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
RECORDS FOR JULY 18
HIGH 96F IN 1991, 1999
LOW 54F IN 1892, 1956, 1971
PRECIP 1.65 INS IN 2000
WIND 43e MPH SW IN 1949
TODAY’S REPORT PREPARED BY: Robert Skilling
