Sunday, October 6, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 6, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
WEEKEND SHOWERS HALT OCTOBER’S DRY START
After 0.27 inch of rain Friday into Saturday, Sunday saw scattered showers
deliver another 0.34 inch before 1:00 P.M. EST and continue into the
afternoon. Low ragged-bottomed cumulus brushed along the summit for most of
the morning, with relatively light winds shifting from the NE to a more
SE tendency ahead of the approaching warm front.
Today’s temperatures have remained steady, hovering around 55F since shortly
after midnight. It looks likely that we will neither reach the
average high (64F) nor the average low (47F), but will come very close
to the day’s overall average of 55F.
Today’s Observations:
7 A.M.
Weather: Light rain and fog, low overcast nimbostratus with stratus drifting
over the summit
Temperature: 56F; Dew Point: 56F; Wind: ENE at 10 kts.
Sea-level pressure: 30.19 ins. Hg, increasing then increasing more slowly
Visibility: 2 miles, light rain and fog
6-hour min. temp: 56F
Manual 24-hour rainfall: 0.10 inch
ASOS 24-hour rainfall: 0.09 inch
BHO SA 1155 E10 BKN 15 OVC 2R-F 225/56/56/0610/019/ STRA DRFTG OVR SMT/
8/72/ 51019 MANUAL 70010 ASOS 70009 ASOS 60007 10058 20056
10 A.M.
Weather: Sky obscured by light rain and fog, stratus drifting over the summit
Temperature: 55F; Dew Point: 55F; Wind: E at 9 kts,
Sea-level pressure: 30.22 ins. Hg, increasing then increasing more slowly
Visibility: 1 mile, light rain and fog
BHO SA 1455 –X E8 OVC 1R-F 233/55/55/0809/022/ STRA DRFTG OVR SMT/
8/72/ 51008 MANUAL 60011 ASOS 60010
1 P.M.
Weather: Light rain and fog, broken low ragged cumulus and
overcast cumulonimbus
Temperature: 55F; Dew Point: 55F; Wind: E at 9 kts,
Sea-level pressure: 30.20 ins. Hg, increasing then decreasing
Visibility: 5 miles, 2 miles ENE-E, light rain and fog
6-hr max temp: 56F
6-hr min temp: 55F
Manual 6-hr precip: 0.24 inch
ASOS 6-hr precip: 0.24 inch
BHO SA 1755 E10 BKN 25 OVC 5R-F 226/55/55/0809/020/ VSBY 2 ENE-E/
8/8// 58007 MANUAL 60024 ASOS 60024 10056 20055
WEATHER SUMMARY FOR SATURDAY, OCTOBER 5, 2013
TEMPERATURE (DEGREES F)
MAX…..67 NORMAL…..64
MIN…..56 NORMAL…..47
MEAN….62 NORMAL…..56
DEPARTURE FROM 30-YEAR NORMAL………………….+6
TOTAL DEPARTURE FOR THE MONTH…………………+39 [+6.5 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………..4 DEPARTURE………+2
TOTAL COOLING UNITS FOR THE SEASON………..700 DEPARTURE…….+101
TOTAL COOLING UNITS LAST SEASON TO DATE……766 DIFFERENCE…….-66
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..3 DEPARTURE………-7
TOTAL HEATING UNITS FOR THE MONTH…………..8 DEPARTURE……..-38
TOTAL HEATING UNITS FOR THE SEASON………..154 DEPARTURE……..-34
TOTAL HEATING UNITS LAST SEASON TO DATE……121 DIFFERENCE…….+33
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………14 ENE AT 5:56 P.M.
AERO…………………..12 ENE AT 5:56 P.M.
ASOS…………………..13 ENE AT 7:31 P.M.
DAVIS………………….12 ENE AT 5:29 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY……………….9.5 ENE AT 7:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..10 E AT 7:15 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..9 ENE AT 7:14 P.M.
AVERAGE WIND SPEED AND DIRECTION………….4.5 E
ASOS………………….4.7
DAVIS…………………4.6 ENE [67 degrees]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.10 DEPARTURE………….-0.05
ASOS…………..0.09
TOTAL PRECIPITATION FOR THE MONTH……….0.37 DEPARTURE………….-0.37
ASOS…………..0.36
TOTAL PRECIPITATION FOR THE YEAR……….42.92 DEPARTURE………….+2.47
ASOS…………..N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
10/1 75/50/63/+6/0.00/676/96 16 WNW AERO 16 MPH WNW RMY 18
10/2 78/56/67/+10/0.00/666/95 29 W AERO 30 MPH W RMY 29
10/3 77/56/67/+11/0.00/…/.. 20 WNW AERO 20 MPH WNW RMY N/A
10/4 67/56/62/+6/0.26/…/.. 18 NW AERO 20 MPH NW RMY N/A
10/5 67/56/62/+6/0.10/…/.. 14 ENE AERO 12 MPH ENE RMY N/A
10/6 the morning low temp: 55F; the normal low is now 47F
DAILY RECORDS FOR OCTOBER 2013
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 6
HIGH 83F IN 1990, 2007
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942
RECORDS FOR OCTOBER 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 54 W IN 2009
TODAY’S REPORT PREPARED BY: Forrest Iwanik
