BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, DECEMBER 17, 2008 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
7 A.M.
Weather: Obscurement with fog, light rain
Temperature: 32F, Dew point: 32F, Wind: NNE at 7 kts
Sea-level pressure: 30.20 inches Hg, falling
Visibility: 1/16 mile
24-hour precipitation: 0.34 in.
24-hour snowfall: 1.2 in.
6-hour minimum temperature: 25F
BHO SA 1155 W3 X 1/16R-F 228/32/32/0307/020/
TOTAL NEW SNW PAST 24 HRS 1.2 INS IPERBUKN/
8//// 4/001 56034 MANUAL 60XX/ ASOS 60021
MANUAL 70034 ASOS 70027 10032 20025
 
10 A.M.
Weather: Obscurement with fog, light rain
Temperature: 36F, Dew point: 36F, Wind: N at 7 kts,
Wind: Direction variability NNW to NE
Sea-level pressure: 30.08 inches Hg, falling
Visibility: 1/16 mile
3-hourly precip: 0.11 inch
BHO SA 1455 W1 X 1/16R-F 186/36/36/0107/008/
WND 33V05/ 8//// 56042 MANUAL 6011/ ASOS 6016
 
1 P.M.
Weather: Obscurement with fog, light freezing rain
Temperature: 28F, Dew point: 28F, Wind: WNW at 12 kts
Sea-level pressure: 29.96 inches Hg, falling
Visibility: 1/16 mile
6 hour maximum temperature: 38F
6-hour precip: 0.15 inch
BHO SA 1755 W1 X 1/16ZR-F 145/28/28/3012/996/
8//// 56041 MANUAL 60015/ ASOS 60019 10038 20028
 
WEATHER SUMMARY FOR TUESDAY, DECEMBER 16
 
TEMPERATURE (DEGREES F)
MAX.....57    NORMAL.....38
MIN.....26    NORMAL.....24
MEAN....42    NORMAL.....31
 
DEPARTURE FROM 30-YEAR NORMAL............. +11
TOTAL DEPARTURE FOR THE MONTH..............+52 [+3.1 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............23  DEPARTURE........-11
TOTAL HEATING UNITS FOR THE MONTH............455  DEPARTURE........-48
TOTAL HEATING UNITS FOR THE SEASON..........1705  DEPARTURE........-87
TOTAL HEATING UNITS LAST SEASON TO DATE.....1686  DIFFERENCE.......+19
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............43  W  AT  1:43 A.M.  
                   AEROVANE.............43  W  AT  1:43 A.M.  
                   ASOS.................41 SSW AT 12:04 A.M.  
                   DAVIS................48 SSW AT 12:04 A.M.
FASTEST MILE FOR YESTERDAY..............30  S  AT 12:04 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........29 SSW AT 12:35 A.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........N/A
                   AVERAGE............11.0  W
                   ASOS...............10.7
                   DAVIS..............11.0 WNW [293 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.34   DEPARTURE.......+0.20
                         ASOS...............0.27
TOTAL PRECIPITATION FOR THE MONTH...........4.97   DEPARTURE.......+2.62
                         ASOS...............5.14
TOTAL PRECIPITATION FOR THE YEAR...........55.26   DEPARTURE.......+6.25
                         ASOS..............58.15 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........1.2  DEPARTURE.....+0.8
TOTAL SNOWFALL FOR THE MONTH................2.8  DEPARTURE.....-1.9
TOTAL SNOWFALL FOR THE SEASON...............2.8  DEPARTURE.....-4.8
 
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
12/1  59/43/51/+15/0.12/0.0/374/67   43 SSW 
12/2  47/32/40/+4/0.00/0.0/451/81    33 SSW
12/3  44/29/37/+2/0.00/0.0/556/100   24 SSW
12/4  53/33/43/+8/T/0.0/122/22       42 SSW   Aero 43 MPH S
12/5  38/26/32/-3/0.00/0.0/404/73    26 WNW
12/6  37/23/30/-4/0.00/0.0/309/56    21 S
12/7  32/20/26/-8/0.12/1.6/000/00    54 W     Aero 53 MPH W
12/8  21/10/16/-17/0.00/0.0/462/84   50 W     Aero 50 MPH W
12/9  53/13/33/0/0.01/T/000/00       48 S     Aero 50 MPH S
12/10 60/37/49/+16/0.43/0.0/000/00   55 S     Aero 58 MPH S
12/11 37/34/36/+4/1.52/T/000/00      38 NNE   Aero 35 MPH NNE
12/12 61/28/45/+13/2.32/0.0/088/16   75 SSE   Aero 76 MPH SSE
12/13 28/17/23/-9/0.00/0.0/531/97    33 W
12/14 43/17/30/-1/0.00/0.0/.../..    36 S
12/15 61/43/52/+21/T/0.0/.../..      55 S     Aero 56 MPH S
12/16 57/26/42/+11/.../../000/00     43 W
 
12/17 morning low temp: 25F; our normal low temp. 23F
 
NEW DAILY RECORDS FOR DECEMBER 2008...
 
12/12 PEAK GUST 75 MPH SSE; PREVIOUS 74 MPH W IN 2000
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR DECEMBER 17
HIGH 63 IN 2000
LOW -10 IN 1942
PRECIP 3.03 INS. IN 1888
SNOWFALL 7.5 INS. IN 1988
PEAK GUST 78 MPH SSE IN 2000
 
RECORDS FOR DECEMBER 18
HIGH 59 IN 1928
LOW -11 IN 1919
PRECIP 1.44 INS. IN 1915
SNOWFALL 7.0 INS. IN 1904
PEAK GUST 76e W IN 1978
 
TODAY'S REPORT PREPARED By: Stephanie Radner