Monday, September 9, 2013
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 9, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNSHINE THROUGH THICKENING HIGH CLOUDS
ANOTHER COOL EARLY SEPTEMBER DAY
TEMPERATURES START OUT AT 47F OR TEN DEGREES BELOW NORMAL
UNLIMITED VISIBILITY REPORTED UP TO 90 MILES
High cirrus clouds were becoming quite dense by early afternoon
and dimming the bright sunshine. High temperatures were struggling
to reach 70 degrees with the normal high still at 74 degrees.
Our low temperature of 47F was 10 degrees below the normal of
57 degrees and was just one degree above our coolest so far
this season of 46F.
Visibility today was our maximum reportable value of 90 miles but
judging by the clarity of the distant mountains visibility could
be up to 100 miles. Mt. Washington has reported 130 miles today,
their highest reportable value.
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, thin broken cirrus radiatus
Temperature: 51F; Dew Point: 40F; Wind: NNW at 5 kts.
Sea-level pressure: 30.24 ins Hg, rising then more slowly
Visibility: 90 miles
6-hr min. temp: 47F
BHO SA 1155 300 –BKN 90 240/51/40/3305/024/ THN CI/BKN
CI RADIATUS FEW LWR CI VSBY PSBL 90 TO 100 MI/
8/001 51023 10050 20047
10 A.M.
Weather: Scattered dense cirrus, thin broken cirrus, thin overcast
cirrus, breaks in the overcast
Temperature: 62F; Dew Point: 41F; Wind SW at 6 kts
Sea-level pressure: 30.25 ins. Hg, rising then falling slightly
Visibility: 90 miles, possible 90 to 100 miles
BHO SA 1455 220 SCT 250 –BKN 300 –OVC 90 242/62/41/2206/025/
BINOVC/ 8/002 50002
1 P.M.
Weather: Scattered and broken dense cirrus with thin spots and a
few small breaks in the clouds, (broken to overcast)
Temperature: 66F; Dew Point: 44F; Wind SW at 10 kts,
Wind: Direction variable S-WSW
Sea-level pressure: 30.21 ins. Hg, falling then more slowly
Visibility: 90 miles
6-hr max. temp: 68F
BHO SA 1755 200 SCT E220 BKN 250 OVC 90 229/66/44/2210/021/
FEW THN SPTS/SML BINOVC ALQDS WND 17V24/ 8/002 56013 10068 20051
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 8, 2013
TEMPERATURE (DEGREES F)
MAX…..74 NORMAL…..74
MIN…..50 NORMAL…..57
MEAN….62 NORMAL…..66
DEPARTURE FROM 30-YEAR NORMAL…………………..-4
TOTAL DEPARTURE FOR THE MONTH………………….-10 [-1.5 DEGREE/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH………….23 DEPARTURE………-5
TOTAL COOLING UNITS FOR THE SEASON………..663 DEPARTURE……..+99
TOTAL COOLING UNITS LAST SEASON TO DATE……754 DIFFERENCE…….-91
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………….31 NW AT 1:23 P.M
AERO…………………33 NW AT 1:23 P.M
ASOS…………………33 NW AT 1:25 P.M.
DAVIS………………..31 NW AT 1:24 P.M. RMY 32
FASTEST MILE FOR YESTERDAY………………23 NW AT 1:23 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………23 NW AT 1:26 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………..22 NW AT 1:26 P.M.
AVERAGE WIND SPEED AND DIRECTION………….12.7 NNW
ASOS………………….11.7
DAVIS…………………10.7 WNW [290 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE………….-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.83 DEPARTURE………….+1.86
ASOS…………..2.95
TOTAL PRECIPITATION FOR THE YEAR……….40.84 DEPARTURE………….+4.85
ASOS…………..N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 76/67/72/+4/2.32/008/01 33 S AERO 39 MPH S RMY 38 TSTM
9/2 79/67/73/+5/0.43/056/07 30 SSE AERO 33 MPH SSE RMY N/A TSTM
9/3 79/61/70/+3/0.00/219/28 28 S AERO 29 MPH S RMY 30 TSTM
9/4 78/57/68/+1/0.00/733/94 24 W AERO 25 MPH W RMY 25
9/5 66/51/59/-8/0.08/179/23 20 NNE AERO 20 MPH NNE RMY 21
9/6 68/46/57/-10/0.00/…/.. 18 WSW AERO 17 MPH WSW RMY N/A
9/7 78/51/65/-1/0.00/…/.. * 20 WSW AERO 21 MPH WSW RMY 21
9/8 74/50/62/-4/0.00/…/.. 31 NW AERO 33 MPH NW RMY 32
9/9 morning low temp: 47F; the normal low is now 57F
* 9/7 mean temp. dep. for day corrected to -1 from zero
DAILY RECORDS FOR SEPTEMBER 2013
9/1 – NEW DAILY RECORD MAXIMUM PRECIPITATION OF 2.32 INCHES;
surpasses previous record of 1.60 inches set in 1927
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 9
HIGH 91F IN 2002
LOW 41F IN 1938
PRECIP 1.97 INCHES IN 1969
PEAK GUST 52 MPH WNW IN 1969, NW IN 1978
RECORDS FOR SEPTEMBER 10
HIGH 90F IN 1931,1989
LOW 41F IN 1956
PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER)
PEAK GUST 48 MPH NW IN 1972
TODAY’S REPORT PREPARED BY: Robert Skilling
