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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, OCTOBER 14, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT RAIN AND FOG THIS MORNING...SUNSHINE RETURNING
THIS AFTERNOON...

Low clouds and thin fog with periods of light rain were observed
this morning. A total of 0.02 inches was observed in the first
period of rain between 8:25 AM EST and 9:20 AM EST. Another 
period of light rain brought an additional 0.02 inches from 
12:05 PM EST to 2:15 PM EST. The first sun of the day broke
through a mostly cloudy sky shortly after the precipitation 
ended. The wind has been very light this morning with only nine
total miles of wind observed from 7 AM to 1 PM EST, for a mean
of 1.5 mph over this six hour period.  The visibility was as low
as 2-3 miles during the rain this morning and has climbed to about 
20 miles as the clouds begin to clear at mid-afternoon. 


Today's Observations:

7 A.M.
Weather: Scattered stratocumulus, broken stratocumulus, overcast
altocumulus, breaks in overcast overhead through E-S-W, few 
altocumulus lenticularis NE-E, hazy
Temperature: 57F; Dew Point: 55F; Wind: SW at 3 kts
Sea-level pressure: 30.31 ins. Hg, rising then falling 
Visibility: 12 miles
6-hr Max temp: 57F
6-hr Min temp: 54F
24-hr precip: 0.00 ins. 
BHO SA 1155 15 SCT E40 BKN 90 OVC 12 264/57/55/2203/031/ BINOVC 
OVHD-E-S-W FEW ACSL NE-E VSBY W-NE 10 SE 20 HAZY WND LGT/ 8/57/ 
50000 10057 20054

10 A.M.
Weather: Overcast stratus, few stratus fractus below summit
Temperature: 59F; Dew Point: 58F; Wind: calm
Sea-level pressure: 30.30 ins. Hg, falling
Visibility: 4 miles, 2 miles NW-NE, 6 miles SSW-WSW
3-hr precip.: 0.02 inches
BHO SA 1455 E15 OVC 4F 261/59/58/0000/030/ FEW STFRA BLO SMT 
VSBY NW-NE 2 SSW-WSW 6/ 8/6// 58003 6002/

1 P.M. 
Weather: Light rain, scattered stratus fractus, broken stratus
and stratocumulus, overcast nimbostratus, few stratus fractus
below summit, ceiling ragged
Temperature: 63F; Dew Point: 61F; Wind: calm
Sea-level pressure: 30.22 ins. Hg, falling, then more rapidly
Visibility: 8 miles, 6 miles N-NE, 10 miles SE-SW
6-hr Max temp: 63F 
6-hr Min temp: 47F
6-hr precip.: 0.04 inches
BHO SA 1755 2 SCT E10 BKN 40 OVC 8R- 235/63/61/0000/022/ FEW 
STFRA BLO SMT CIG RGD VSBY N-NE 6 SE-SW 10/ 8/72/ 58026 6004/ 
10063 20057

SUMMARY FOR FRIDAY, OCTOBER 13, 2017
 
TEMPERATURE (DEGREES F)
MAX.....64   NORMAL.....61
MIN.....48   NORMAL.....44
MEAN....56   NORMAL.....53

DEPARTURE FROM 30-YEAR NORMAL.........................+3
TOTAL DEPARTURE FOR THE MONTH.......................+100 [+7.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE...........0
TOTAL COOLING UNITS FOR THE MONTH..............20   DEPARTURE.........+16
TOTAL COOLING UNITS FOR THE SEASON............727   DEPARTURE........+126
TOTAL COOLING UNITS LAST SEASON TO DATE.......894   DEPARTURE........-167

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............9   DEPARTURE..........-4
TOTAL HEATING UNITS FOR THE MONTH..............52   DEPARTURE.........-86
TOTAL HEATING UNITS FOR THE SEASON............145   DEPARTURE........-135
TOTAL HEATING UNITS LAST SEASON TO DATE.......183   DEPARTURE.........-38

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................20   E AT  5:00 A.M.
                   AERO........................16   E AT  5:00 A.M.
                   ASOS........................20   E AT  5:01 A.M.
                   DAVIS.......................19   E AT  5:00 A.M.   RMY 17
FASTEST MILE FOR YESTERDAY.....................15   E AT  1:30 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................15   E AT  9:06 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15   E AT  5:01 A.M.
AVERAGE WIND SPEED AND DIRECTION.............10.6  SE
                   ASOS.......................9.5
                   DAVIS......................9.6 ESE [114 DEG.]


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..........0.45  DEPARTURE......-1.48
                         ASOS..............0.46
TOTAL PRECIPITATION FOR THE YEAR..........42.31  DEPARTURE......+1.30
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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  65/42/54/-3/0.00/697/99               18 WNW AERO 16 NW  RMY N/A
10/2  65/46/56/-1/0.00/687/98               21 NNW AERO 21 NNW RMY 21
10/3  67/50/59/+3/0.00/677/97               21 S   AERO 21 S   RMY N/A
10/4  75/50/63/+7/0.00/660/95               30 SSW AERO 30 SW  RMY 32
10/5  79/60/70/+14/0.00/.../..              28 SW  AERO 26 SW  RMY N/A
10/6  73/57/65/+10/T/.../..                 15 NW  AERO 14 NW  RMY 15
10/7  75/59/67/+12/T/.../..                 29 S   AERO 30 SSW RMY N/A
10/8  71/67/69/+15/0.23/.../..              33 S   AERO 36 SSW RMY 37
10/9  71/68/70/+16/0.22/.../..              43 S   AERO 41 S   RMY 45
10/10 76/61/69/+15/0.00/.../..              21 WNW AERO 20 WNW RMY 21 
10/11 68/55/62/+9/0.00/.../..               29 ENE AERO 25 ENE RMY 29 
10/12 58/48/50/0/T/.../..                   30 NE  AERO 28 ENE RMY 30 
10/13 64/48/56/+3/0.00/.../..               20 E   AERO 16 E   RMY 17

10/14 Low temp since midnight is 54F; normal low is now 43F

DAILY RECORDS FOR OCTOBER

10/8/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 67F,
         BREAKS PREVIOUS RECORD OF 60F SET IN 1944

10/9/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 61F SET IN 2011

10/9/17: MONTHLY RECORD HIGH MINIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 67F SET ON OCTOBER 13, 1990
         AND TIED ON OCTOBER 8, 2017

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):      

RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976

RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003

TODAY'S REPORT PREPARED BY: Mike Iacono