Saturday, October 8, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, OCTOBER 8, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
HIGH PRESSURE MOVES OFFSHORE
A strong temperature inversion trapped thick fog approximately 200 feet below
the summit this morning obscuring much of the features below. Horizontal visibility
was 70 miles but decreased in sectors as the fog lifted in late morning. Skies
were mostly cloudy with cirrostratus all day and stratocumulus in the early
afternoon.
The high pressure which gave us dry conditions during the week has moved offshore
causing station pressure to fall throughout the day. Dew points continued to rise,
reaching the upper 50s today. Winds picked up in the early afternoon and have been
out of the south since late last evening. Temperatures reached a max of 69F, but
started falling with increasing cloud cover.
7 A.M.
Weather: Broken cirrostratus, fog below temperature inversion with an estimated
top of 400 ft
Temperature: 54F; Dew Point: 53F; Wind: S at 8 kts
Sea-level pressure: 30.17 ins. Hg, rising, then falling
Visibility: 70 miles
6-hr Max temp: 57F
6-hr Min temp: 53F
24-hr precip: 0.00 in.
BHO SA 1155 E180 BKN 70 216/54/53/1808/017/ F BLO INVSN ESTMTD TOP 4 HND/ 8/007
58001 10057 20053
10 A.M.
Weather: Few cumulus, broken cirrostratus
Temperature: 63F; Dew Point: 54F; Wind: SSE at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.15 ins. Hg, rising then falling
Visibility: 70 miles, except 50 miles NE and SW, distant fog NE and SW
BHO SA 1455 E180 BKN 70 211/63/54/1605/015/ FEW CU NE-SW VSBY NE AND SW 50 DSNT
FG NE AND SW WND LGT/ 8/107 58005
1 P.M.
Weather: Broken stratocumulus, overcast cirrostratus
Temperature: 68F; Dew Point: 59F; Wind: S at 9 kts
Sea-level pressure: 30.10 ins. Hg, falling, then less quickly
Visibility: 70 miles
6-hr Max. temp: 69F
6-hr Min. temp: 54F
BHO SA 1755 E27 BKN 220 OVC 70 194/68/59/1909/010/ 8/506 56017 10069 20054
SUMMARY FOR FRIDAY, OCTOBER 7, 2016
TEMPERATURE (DEGREES F)
MAX…..75 NORMAL…..63
MIN…..54 NORMAL…..46
MEAN….65 NORMAL…..55
DEPARTURE FROM 30-YEAR NORMAL…………………..+10
TOTAL DEPARTURE FOR THE MONTH…………………..+13 [+1.7 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………0 DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON…………894 DEPARTURE……..+294
TOTAL COOLING UNITS LAST SEASON TO DATE…….810 DIFFERENCE……..+84
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE………-11
TOTAL HEATING UNITS FOR THE MONTH…………..54 DEPARTURE………-12
TOTAL HEATING UNITS FOR THE SEASON…………129 DEPARTURE………-80
TOTAL HEATING UNITS LAST SEASON TO DATE…….129 DIFFERENCE……….0
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….16 S AT 7:52 P.M.
ASOS……………………16 S AT 7:52 P.M.
DAVIS…………………..15 S AT 6:40 P.M. RMY 16
FASTEST MILE FOR YESTERDAY…………………12 S AT 7:50 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 N AT 6:36 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 N AT 6:36 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.2 E
ASOS…………………..8.6
DAVIS………………….7.6 E [100 Deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.41 DEPARTURE……+0.37
ASOS…………..1.43
TOTAL PRECIPITATION FOR THE YEAR……….28.73 DEPARTURE…..-11.39
ASOS………….29.07
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system 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
M: Missing data
10/1 57/52/55/-2/1.22/000/00 33 NNE AERO M RMY 34
10/2 55/52/54/-3/0.19/…/.. 23 N AERO M RMY N/A
10/3 69/53/61/+5/0.00/…/.. 21 ENE AERO M RMY 20
10/4 61/47/54/-2/T/…/.. 26 NE AERO M RMY 27
10/5 61/44/53/-3/0.00/…/.. 22 NE AERO M RMY 21
10/6 71/46/59/+4/0.00/…/.. 16 SW* AERO M RMY 15
10/7 75/54/65/+10/0.00/…/.. 16 S AERO M RMY 16
10/8 Low temp since midnight is 53F; normal low is now 46F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.31 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996
RECORDS FOR OCTOBER 9
HIGH 82F IN 2011
LOW 29F IN 1907,1937
PRECIP 2.54 INCHES IN 1976
SNOWFALL 0.2 INCHES IN 1888
PEAK GUST 81e MPH S IN 1976 (RECORD FOR MONTH)
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
