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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 28, 2016  
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT DRIZZLE AMOUNTS TO 0.04 IN. BY EARLY AFTERNOON

The stalled front south of the region continues to bring NE flow and
overcast skies.  Light drizzle began shortly before 7:00AM EST and
continued through the afternoon, amounting to 0.04 in. by 1:00PM.
Overcast stratus clouds fell lower and lower leaving us with a ceiling
of only 700 ft. by early afternoon.  Temperatures fell throughout the day
from a high of 59F shortly after midnight to only 53F by 1:00PM.  The NE
flow has brought much gustier conditions than previous days.  A peak gust
of 29 kts (33 MPH) NNE occurred at 12:38PM EST.


7 A.M. 
Weather: Light drizzle, overcast stratus
Temperature: 56F; Dew Point: 53F; Wind: ENE at 13G22 kts
Sea-level pressure: 30.18 ins. Hg, rising, then more quickly
Visibility: 10 miles, distant fog
6-hr Max temp: 59F
6-hr Min temp: 55F
24-hr precip: 0.03 in.
BHO SA 1155 E17 OVC 10L- 221/56/53/0613G22/018/ DSNT FG PCPN VRY LGT/ 8/6//
53024 MANUAL 70003 ASOS 70003 10059 20055

10 A.M.
Weather: Light drizzle, overcast stratus
Temperature: 55F; Dew Point: 53F; Wind: NE at 13G24 kts
Sea-level pressure: 30.22 ins. Hg, rising, then less quickly
Visibility: 10 miles, distant fog 
3-hr precip: Trace
BHO SA 1455 E8 OVC 10L- 234/55/53/0513G24/022/ DSNT FG PCPN VRY LGT/ 8/6//
50013 MANUAL 600// 

1 P.M. 
Weather: Light drizzle, overcast stratus
Temperature: 53F; Dew Point: 52F; Wind: NE at 17G25 kts
Peak Wind: 29 kts (33 MPH) NNE at 12:38PM EST
Sea-level pressure: 30.24 ins. Hg, rising, then more quickly
Visibility: 10 miles, distant fog
6-hr Max. temp: 56F 
6-hr Min. temp: 52F
6-hr precip: 0.04 in.
BHO SA 1755 E7 OVC 10L- 239/53/52/0417G25/024/ DSNT FG PCPN VRY LGT PK WND 0329/38/
8/6// 50005 MANUAL 6004/ ASOS 60004 10056 20052


SUMMARY FOR TUESDAY, SEPTEMBER 27, 2016
 
TEMPERATURE (DEGREES F)
MAX.....69   NORMAL.....67
MIN.....57   NORMAL.....50 
MEAN....63   NORMAL.....59

DEPARTURE FROM 30-YEAR NORMAL........................+4
TOTAL DEPARTURE FOR THE MONTH......................+100 [+3.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH.............102   DEPARTURE.........+44
TOTAL COOLING UNITS FOR THE SEASON............894   DEPARTURE........+299
TOTAL COOLING UNITS LAST SEASON TO DATE.......797   DIFFERENCE........+97 

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE..........-5
TOTAL HEATING UNITS FOR THE MONTH..............35   DEPARTURE.........-59
TOTAL HEATING UNITS FOR THE SEASON.............45   DEPARTURE.........-74
TOTAL HEATING UNITS LAST SEASON TO DATE........42   DIFFERENCE.........+3

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................23 S   AT  2:41 A.M. 
                   ASOS........................23 S   AT  2:40 A.M.  
                   DAVIS.......................21 S   AT  2:39 A.M. RMY N/A 
FASTEST MILE FOR YESTERDAY.....................16 S   AT  2:31 A.M.*     
MAXIMUM 2-MINUTE ASOS AVERAGE..................16 S   AT  2:47 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 SSE AT  2:33 A.M.   
AVERAGE WIND SPEED AND DIRECTION..............7.6 E 
                   ASOS.......................7.9
                   DAVIS......................7.0 SSE  [160 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03  DEPARTURE......-0.12
                         ASOS..............0.03
TOTAL PRECIPITATION FOR THE MONTH..........1.97  DEPARTURE......-1.65
                         ASOS..............1.98
TOTAL PRECIPITATION FOR THE YEAR..........26.94  DEPARTURE.....-11.70
                         ASOS.............27.25 
 
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

9/1  72/64/68/0/0.09/000/00                  21 NNW AERO 16 NNW RMY 20
9/2  76/58/67/-1/0.00/738/94                 23 ENE AERO 17 NE  RMY 23
9/3  72/56/64/-3/0.00/368/47                 16 E   AERO 12 E   RMY N/A
9/4  71/58/65/-2/0.00/740/95                 28 NE  AERO 21 NE  RMY 27
9/5  73/57/65/-2/0.52/241/31                 42 NNE AER0 33 NNE RMY 43  
9/6  70/61/66/-1/0.54/046/06                 32 N   AERO 23 NNE RMY N/A  
9/7  78/66/72/+6/0.05/339/44                 21 NE* AERO 15 NE* RMY 21
9/8  79/65/72/+6/T/276/36                    22 S   AERO 15 S   RMY 23
9/9  90/69/80/+14/T/421/55                   23 W   AERO 24 W   RMY 25  
9/10 82/71/77/+12/T/229/30                   25 S   AERO 18 S   RMY 32
9/11 79/59/69/+4/0.10/365/48                 39 WNW AERO 30 WNW RMY 43
9/12 76/53/65/0/0.00/749/99                  18 SW* AERO 13 WNW RMY 19
9/13 81/57/69/+5/0.00/739/98                 25 SSW AERO  M     RMY 26
9/14 87/58/73/+9/T/526/70                    35 NNW AERO  M     RMY 35
9/15 67/52/60/-4/0.00/531/71                 21 NE  AERO  M     RMY 20
9/16 74/54/64/+1/0.00/567/76                 23 SSE AERO  M     RMY 24   
9/17 77/54/66/+3/0.00/676/91                 28 S   AERO  M     RMY 28
9/18 79/63/71/+9/T/133/18                    30 SW  AERO  M     RMY 33
9/19 73/67/70/+8/0.16/000/00                 25 S   AERO  M     RMY N/A
9/20 81/66/74/+12/0.00/316/43                16 WSW*AERO  M     RMY N/A
9/21 81/64/73/+12/T/541/74                   20 WNW AERO  M     RMY 18
9/22 82/63/73/+12/0.00/700/96                23 S   AERO  M     RMY 25   
9/23 80/53/67/+7/0.16/152/21                 32 NE  AERO  M     RMY 32 
9/24 66/48/57/-3/0.03/643/89                 24 NW  AERO  M     RMY 25
9/25 65/44/55/-5/0.00/698/97                 31 NW  AERO  M     RMY 32
9/26 68/43/56/-3/0.00/624/87                 25 S   AERO  M     RMY 25
9/27 69/57/63/+4/0.31/021/03                 23 S   AERO  M     RMY N/A

9/28 Low temp since midnight is 54F; normal low is now 50F

DAILY RECORDS FOR SEPTEMBER 2016

9/10/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 71F,
         BREAKS PREVIOUS RECORD OF 69F SET IN 1915, 1931, AND 1989

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

RECORDS FOR SEPTEMBER 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962

RECORDS FOR SEPTEMBER 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle