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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 21, 2016  
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE NORMAL TEMPS, EXTREMELY HUMID CONDITIONS

An approaching sub-tropical low pressure system has given us a humid
and cloudy day.  Dew points had risen to the mid 60s and remained there
through the early afternoon.  Thick morning fog cleared to scattered
cumulus late in the morning, but skies were overcast by the 1:00PM
observation.  Southeast winds were gusting to a max. of almost 30 MPH.

Temperatures were above normal again today as well.  The minimum temp.
since midnight (57F) and the max. by 1:00PM (75F) are both 16F above
their respective averages.


7 A.M. 
Weather: Thick fog
Temperature: 65F; Dew Point: 65F; Wind: SSE at 10 kts
Sea-level pressure: 29.90 ins. Hg, falling, then more quickly
Visibility: 1/8 mile
6-hr Max temp: 65F
6-hr Min temp: 58F
24-hr precip: 0.05 in.
BHO SA 1155 W3 X 1/8F 124/65/65/1510/990/ 8//// 56011 MANUAL 70005
ASOS 70005 10065 20058

10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 72F; Dew Point: 66F; Wind: SSE at 15G22 kts
Sea-level pressure: 29.83 ins. Hg, falling, then more quickly
Visibility: 35 miles, except 20 miles ESE-N
BHO SA 1455 10 SCT 250 SCT 35 101/72/66/1615G22/983/
VSBY 20 ESE-N/ 8/101 58023

1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 72F; Dew Point: 65F; Wind: SE at 14G22 kts
Sea-level pressure: 29.73 ins. Hg, falling, then more quickly
Visibility: 25 miles, distant fog
6-hr Max. temp: 75F
6-hr Min. temp: 65F
BHO SA 1755 E38 BKN 64 OVC 25 067/72/65/1414G22/973/ DSNT FG/
8/41/ 58034 10075 20065

SUMMARY FOR THURSDAY, OCTOBER 20, 2016
 
TEMPERATURE (DEGREES F)
MAX.....64   NORMAL.....59
MIN.....54   NORMAL.....41
MEAN....59   NORMAL.....50

DEPARTURE FROM 30-YEAR NORMAL........................+9
TOTAL DEPARTURE FOR THE MONTH.......................+82 [+3.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE...........0
TOTAL COOLING UNITS FOR THE MONTH...............6   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE SEASON............900   DEPARTURE........+298
TOTAL COOLING UNITS LAST SEASON TO DATE.......810   DIFFERENCE........+90 

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............6   DEPARTURE..........-9
TOTAL HEATING UNITS FOR THE MONTH.............154   DEPARTURE.........-82
TOTAL HEATING UNITS FOR THE SEASON............229   DEPARTURE........-149
TOTAL HEATING UNITS LAST SEASON TO DATE.......292   DIFFERENCE........-63

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................23 ENE AT  4:06 P.M.
                   ASOS........................23 ENE AT  4:39 P.M.
                   DAVIS.......................21  E  AT  4:33 P.M. RMY 22 
FASTEST MILE FOR YESTERDAY.....................16 ENE AT  7:49 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE..................17  E  AT  4:08 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE.................16 ENE AT  4:08 P.M.   
AVERAGE WIND SPEED AND DIRECTION.............12.2 ENE
                   ASOS......................12.3
                   DAVIS.....................10.7 ENE [070 Deg.]
*last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.05  DEPARTURE......-0.10
                         ASOS..............0.05
TOTAL PRECIPITATION FOR THE MONTH..........3.89  DEPARTURE......+0.91
                         ASOS..............3.91
TOTAL PRECIPITATION FOR THE YEAR..........31.21  DEPARTURE.....-10.85
                         ASOS.............31.55 
 

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/+7/0.00/.../..                 23 SSW AERO  M  RMY 23
10/9  63/44/54/0/1.89/.../..                  28 N   AERO  M  RMY 34
10/10 57/40/49/-5/0.00/.../..                 32 NW  AERO  M  RMY 32
10/11 62/39/51/-2/0.00/.../..                 17 N   AERO  M  RMY N/A
10/12 68/49/59/+6/0.00/.../..                 17 S   AERO  M  RMY 17
10/13 71/52/62/+9/T/.../..                    24 SSW AERO  M  RMY 28
10/14 58/41/50/-2/0.00/.../..                 26 NNW AERO  M  RMY 25
10/15 58/38/48/-4/0.00/.../..                 23 S   AERO  M  RMY 26
10/16 68/46/57/+6/0.00/.../..                 28 SSW AERO  M  RMY 30
10/17 76/58/67/+16/0.00/.../..                23 WSW AERO  M  RMY N/A
10/18 74/56/65/+14/0.54/.../..                35 SSW AERO  M  RMY 37
10/19 79/58/69/+19/0.00/.../..                29 SSW AERO  M  RMY N/A
10/20 64/54/59/+9/..../.../..                 23 ENE AERO  M  RMY 22

10/21 Low temp since midnight is 57F; normal low is now 41F

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

RECORDS FOR OCTOBER 21
HIGH 79F IN 1979
LOW 24F IN 1974
PRECIP 2.39 INCHES IN 1944
SNOWFALL TRACE IN 1895,1907,1940
PEAK GUST 69e MPH S IN 1976

RECORDS FOR OCTOBER 22
HIGH 85F IN 1979
LOW 22F IN 1940
PRECIP 2.38 INCHES IN 2014
SNOWFALL TRACE IN 1969, 2010
PEAK GUST 67 MPH ESE IN 1988

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle