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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, DECEMBER 7, 2016  

MORNING RAIN BRINGS ANOTHER 0.10 IN OF PRECIP

This morning's rain turned to light drizzle before the 7:00AM ob.
and measured 0.09 in.  An additional 0.01 in. was measured at the
10:00AM ob.  Temperatures hovered between 35F and 37F late last
evening and early this morning, finally reaching a low of 34F after
7:00AM.  They rose to just 39F by 1:00PM.

Fog limited visibility to just 1/16 mile during the 10:00AM ob but
cleared to 10-40 miles of visibility by early afternoon.  Skies
remained overcast, and winds decreased to near-calm levels.


PRELIMINARY STATS FOR NOVEMBER 2016

TEMPERATURE, Deg. F
Avg. Max. 52.8 [+2.8]
Avg. Min. 36.3 [+2.8]
Mean      44.6 [+2.9]
24-hour corrected mean: 44.0
Max. for month: 69F on 2nd
Min. for month: 28F on 21st, 22nd, 23rd, 28th
 
HEATING DEGREE DAYS
Total heating units: 609 [-89] 
Total for the season: 1030 [-231]
Total for last season: 1002
 
PRECIPITATION, Inches
Total: 2.61 [-2.15]
Greatest in 24 hrs: 1.27 in. on 15th-16th
 
WIND, mph
Avg. uncorrected wind speed: 11.5
Avg. corrected wind speed: 11.9
Prevailing wind direction: NW at 17%
Peak gust and direction: 45 ESE on 29th
 
SUNSHINE:
Campbell-Stokes card minutes: 9012 mins. of possible 17010 mins. or 53%
Astronomical total minutes: 9315 mins. of possible 17593 mins. or 53%


7 A.M.
Weather: Light drizzle, overcast stratus
Temperature: 36F; Dew Point: 34F; Wind: E at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.96 ins. Hg, falling then rising
Visibility: 8 miles, except 30 miles ENE-SSE and 10 miles SSE-W,
distant fog SSE-ENE
6-hr Max temp: 37F
6-hr Min temp: 35F
24-hr precip: 0.09 in.
BHO SA 1155 E20 OVC 8L- 145/36/34/0806/996/ VSBY ENE-SSE 30 SSE-W 10
DSNT FG SSE-ENE WND LGT/ 8/6// 53013 MANUAL 70009 ASOS 70010 10037 20035

10 A.M.
Weather: Sky obscured in dense fog
Temperature: 35F; Dew Point: 35F; Wind: NW at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.00 ins. Hg, rising, then less quickly
Visibility: 1/16 mile
3-hr precip: 0.01 in.
BHO SA 1455 W2 X 1/16F 160/35/35/3205/000/ WND LGT/
8//// 51015 MANUAL 6001/ ASOS 60002

1 P.M.
Weather: Overcast stratus
Temperature: 39F; Dew Point: 37F; Wind: estimated WNW at 1 kt,
Wind: Light and variable
Sea-level pressure: 29.96 ins. Hg, falling, then more quickly
Visibility: 10 miles except 40 miles ESE-SW and 20 miles WSW-WNW,
distant fog in all directions
6-hr Max temp: 39F
6-hr Min temp: 34F
6-hr precip: 0.01 in.
BHO SA 1755 E6 OVC 10 145/39/37/E2901/996/ VSBY ESE-SW 40 WSW-WNW 20
WND L/V/ 8/6// 58015 MANUAL 6001/ ASOS 60002 10039 20034


SUMMARY FOR TUESDAY, DECEMBER 6, 2016
 
TEMPERATURE (DEGREES F)
MAX.....42   NORMAL.....42
MIN.....30   NORMAL.....27
MEAN....36   NORMAL.....35

DEPARTURE FROM 30-YEAR NORMAL........................+1
TOTAL DEPARTURE FOR THE MONTH.......................+13 [+2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............29   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH.............163   DEPARTURE.........-14
TOTAL HEATING UNITS FOR THE SEASON...........1193   DEPARTURE........-245
TOTAL HEATING UNITS LAST SEASON TO DATE......1138   DIFFERENCE........+55

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................22 W   AT 1:58 A.M.
                   ASOS........................22 WNW AT 1:59 A.M.
                   DAVIS.......................22 W   AT 2:13 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................16 W   AT 2:02 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................16 WNW AT 2:21 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 W   AT 2:22 A.M.
AVERAGE WIND SPEED AND DIRECTION..............8.5 WNW
                   ASOS.......................9.0
                   DAVIS......................7.6 NW [310 Deg.]
*last of multiple occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.09  DEPARTURE......-0.07
                         ASOS..............0.10
TOTAL PRECIPITATION FOR THE MONTH..........0.42  DEPARTURE......-0.56
                         ASOS..............0.47
TOTAL PRECIPITATION FOR THE YEAR..........37.39  DEPARTURE.....-12.12
                         ASOS.............37.90

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.3
TOTAL SNOWFALL FOR THE MONTH................0.4  DEPARTURE.......-1.3
TOTAL SNOWFALL FOR THE SEASON...............0.4  DEPARTURE.......-3.9


PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

11/1  55/29/42/-4/0.00/0.0/600/97           22 SSE AERO 22 S   RMY N/A
11/2  69/45/57/+11/0.00/0.0/425/69          24 SSW AERO 24 S   RMY 26
11/3  65/49/57/+11/0.01/0.0/025/04          38 W   AERO 41 W   RMY 38
11/4  56/35/46/+1/0.00/0.0/587/96           26 NW  AERO 26 NW  RMY 30
11/5  55/32/44/-1/0.00/0.0/250/41           24 W   AERO 23 W   RMY 24
11/6  49/39/44/-1/0.04/T/091/15             23 N   AERO 23 N   RMY 23
11/7  46/33/40/-5/0.00/0.0/423/70           21 N   AERO 21 N   RMY 20
11/8  64/36/50/+6/0.00/0.0/590/98           17 W   AERO 15 SSW RMY N/A
11/9  60/43/52/+8/T/0.0/090/15              22 NNW AERO 22 NW  RMY N/A
11/10 52/34/43/-1/0.00/0.0/507/85           28 SSW AERO 30 SSW RMY 31
11/11 59/35/47/+4/0.00/0.0/565/95           39 NW  AERO 44 NW  RMY 45
11/12 47/31/39/-4/0.00/0.0/569/96           38 NW  AERO 44 NW  RMY 23    
11/13 59/37/48/+5/0.00/0.0/519/88           23 W   AERO 22 W   RMY N/A
11/14 66/44/55/+13/0.00/0.0/547/93          24 WSW AERO 22 WSW RMY 25
11/15 57/46/52/+10/1.23/0.0/000/00          32 ENE AERO 33 ENE RMY 35
11/16 57/45/51/+9/0.04/0.0/000/00           26 W   AERO 25 W   RMY 28
11/17 55/41/48/+7/0.00/0.0/169/29           25 WNW AERO 29 NW  RMY 29
11/18 60/38/49/+8/0.00/0.0/580/100          21 NNE AERO 22 N   RMY 23
11/19 53/40/47/+6/0.02/0.0/445/77           18 ENE AERO 18 ENE RMY N/A
11/20 46/29/38/-2/0.04/0.0/006/01           37 SW* AERO 40 SW  RMY N/A
11/21 36/28/32/-8/T/T/138/24                40 W   AERO 44 W   RMY 44
11/22 41/28/35/-5/0.00/0.0/555/97           35 W   AERO 37 W   RMY 36
11/23 43/28/36/-3/0.00/0.0/542/95           32 WNW AERO 33 WNW RMY N/A
11/24 41/29/35/-4/0.05/T/000/00             15 NNE AERO 13 NNE RMY N/A
11/25 46/38/42/+3/0.08/0.0/000/00           24 SE  AERO 23 SE  RMY 25
11/26 45/36/41/+3/0.00/0.0/085/15           18 NW  AERO 17 NW  RMY 28
11/27 44/30/37/-1/0.00/0.0/451/80           26 W   AERO 26 WNW RMY 29
11/28 44/28/36/-2/0.00/0.0/556/99           22 WNW AERO 21 WNW RMY 22
11/29 57/37/47/+10/0.46/0.0/000/00          45 ESE AERO 47 SSE*RMY 47
11/30 57/45/51/+14/0.64/0.0/000/00          32 ENE AERO 33 E   RMY 31


PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

12/1  55/39/47/+10/0.20/0.0/000/00          36 W   AERO 37 W   RMY 36
12/2  48/34/41/+5/0.00/0.0/.../..           32 W   AERO 32 W   RMY N/A
13/3  44/31/38/+2/0.00/0.0/.../..           37 WNW AERO 39 WNW RMY 40
12/4  39/27/33/-2/0.00/0.0/.../..           25 NW  AERO 25 NW  RMY N/A
12/5  36/27/32/-3/0.13/0.4/.../..           26 W   AERO 25 W   RMY 29
12/6  42/30/36/+1/0.00/0.0/.../..           22 W   AERO 21 W   RMY N/A

12/7  Low temp since midnight is 35F; normal low is now 27F


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

RECORDS FOR DECEMBER 7
HIGH 74 IN 1998
LOW 6 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 6.3 INS. IN 2003
PEAK GUST 76e SE IN 1976

RECORDS FOR DECEMBER 8
HIGH 62 IN 1966
LOW -4 IN 1906
PRECIP 1.54 INS. IN 1969
SNOWFALL 2.5 INS. IN 2001
PEAK GUST 78e W IN 1979
 
TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle