Sunday, October 9, 2016

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 9, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN AND FOG START THE MORNING

Light rain and fog obscured the sky for all observations today
as temperatures cooled with the passing of the cold front.
The high for the day, which occurred at midnight is 63, but
current temperatures are in the lower 50s with humidity at
100%.  Winds have been gusty with multiple gusts into the
upper 30 mph range.

7 A.M.
Weather: Light Rain and Fog
Temperature: 55F; Dew Point: 55F; Wind: N at 11 kts gust 17
Sea-level pressure: 29.98 ins. Hg, rising then more rapidly
Visibility: 1/4 miles
6-hr Max temp: 62F
6-hr Min temp: 55F
24-hr precip: 0.22 in.
BHO SA 1155 W2 X 1/8R-F 153/55/55/3511G17/998/ 8//// 53008
ASOS 60018 MANUAL 6//// ASOS 70018 MANUAL 70022 10062 20055

10 A.M.
Weather: Moderate Rain and Fog
Temperature: 53F; Dew Point: 53F; Wind: N at 14 kts, gust 21
Sea-level pressure: 30.01 ins. Hg, rising then slower
Visibility: 2 miles
3-hr precip: 041 in.
BHO SA 1455 W3 X 2RF 162/53/53/0214G21/001 8//// 51009
ASOS 60041 MANUAL 60041

1 P.M.
Weather: Moderate rain and fog
Temperature: 51F; Dew Point: 51F; Wind: N at 13 kts Gust 24
Sea-level pressure: 29.99 ins. Hg, rising then falling
Visibility: 1 mile
6-hr Max. temp: 55F
6-hr Min. temp: 51F
6-hr precip: 0.78 in.
BHO SA 1755 W3 X 1RF 156/51/51/0213G24/999/ 8//// 58008
ASOS 60080 MANUAL 60078 10055 20051

SUMMARY FOR SATURDAY, OCTOBER 8, 2016

TEMPERATURE (DEGREES F)
MAX…..69   NORMAL…..63
MIN…..53   NORMAL…..46
MEAN….61   NORMAL…..54

DEPARTURE FROM 30-YEAR NORMAL…………………..+7
TOTAL DEPARTURE FOR THE MONTH…………………..+20 [+1.9 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……………4   DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE MONTH…………..58   DEPARTURE………-19
TOTAL HEATING UNITS FOR THE SEASON…………133   DEPARTURE………-87
TOTAL HEATING UNITS LAST SEASON TO DATE…….138   DIFFERENCE………-5

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 SSW  AT  4:02 P.M.
ASOS……………………24 SSW  AT  4:01 P.M.
DAVIS…………………..22 SSW  AT  4:01 P.M. RMY 23
FASTEST MILE FOR YESTERDAY…………………15 SSW  AT  4:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 S    AT  4:03 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 SSW  AT  4:03 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.7 SSW
ASOS…………………..9.2
DAVIS………………….8.3 S [185 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.22  DEPARTURE……+0.07
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE MONTH……….1.63  DEPARTURE……+0.22
ASOS…………..1.61
TOTAL PRECIPITATION FOR THE YEAR……….28.95  DEPARTURE…..-11.32
ASOS………….29.25

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  69/53/61/+7/0.22/…/..                     23 SSW AERO  M     RMY 23

10/9 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 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)

RECORDS FOR OCTOBER 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958

TODAY’S REPORT PREPARED BY: Robert Millette