BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, DECEMBER 25, 2008 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
7 A.M.
Weather: Scattered stratocumulus
Temperature: 39F, Dew point: 24F, Wind: W at 27G37 kt,
Sea-level pressure: 29.89 inches Hg, rising  
Visibility: 50 miles
6-hour minimum temperature: 39F
24-hour precipitation: 0.31 inches
24-hour snowfall: 0.0 inches
Snow on ground: 2 inches
BHO SA 1155 E20 SCT 50 122/39/24/2627G37/989/
PK WND 2744/1102/ 8/400 4/002 52064 60/// 70031 10052 20039
 
10 A.M.
Weather: Scattered stratocumulus
Temperature: 40F, Dew point: 24F, Wind: W 26G34 kt,
Sea-level pressure: 30.03 inches Hg, rising
Visibility: 50 miles
BHO SA 1455 E20 SCT 50 169/40/24/2626G34/003/
PK WND 2637/1430/ 8/400 51047
 
1 P.M.
Weather: Clear with a few clouds
Temperature: 40F, Dew point: 22F, Wind: W 25G34 kt,
Sea-level pressure: 30.08 inches Hg, rising
Visibility: 65 miles
6-hour maximum temperature: 41F
BHO SA 1755 CLR 65 186/40/22/2725G32/008/
FEW SC ALQDS PKWND 2733/1733/ 8/400 51017 10041 20039
 
WEATHER SUMMARY FOR WEDNESDAY, DECEMBER 24
 
TEMPERATURE (DEGREES F)
MAX.....50    NORMAL.....36
MIN.....23    NORMAL.....21
MEAN....37    NORMAL.....29
 
DEPARTURE FROM 30-YEAR NORMAL...............+8
TOTAL DEPARTURE FOR THE MONTH..............+14 [+0.4 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............28  DEPARTURE.........-8
TOTAL HEATING UNITS FOR THE MONTH............775  DEPARTURE.........-8
TOTAL HEATING UNITS FOR THE SEASON..........2025  DEPARTURE........-47
TOTAL HEATING UNITS LAST SEASON TO DATE.....1959  DIFFERENCE.......+66
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............53   S  AT 10:24 P.M. *   
                   AEROVANE.............54   S  AT  9:08 P.M.   
                   ASOS.................54 SSW  AT 11:56 P.M.     
                   DAVIS................53   S
FASTEST MILE FOR YESTERDAY..............42   S  AT  9:58 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........41 SSW  AT 10:01 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE..........42 SSW  
                   AVERAGE............24.0   S
                   ASOS...............23.3
                   DAVIS..............23.5   SSW [206 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.31  DEPARTURE.........+0.16
                         ASOS...............0.33
TOTAL PRECIPITATION FOR THE MONTH...........8.03  DEPARTURE.........+4.52
                         ASOS...............8.08
TOTAL PRECIPITATION FOR THE YEAR...........58.32  DEPARTURE.........+8.15
                         ASOS..............61.09 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......-0.4
TOTAL SNOWFALL FOR THE MONTH...............22.5  DEPARTURE....+14.6
TOTAL SNOWFALL FOR THE SEASON..............22.5  DEPARTURE....+11.7
 
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/-1/0.00/0.0/328/60    36 S
12/15 61/43/52/+21/T/0.0/076/15      55 S     Aero 56 MPH S
12/16 57/26/42/+11/.../../000/00     43 W
12/17 38/25/32/+1/.../../000/00      26 E     Aero 22 MPH E
12/18 37/28/33/+3/0.00/0.0/.../..    23 WSW
12/19 29/14/22/-8/.../../000/00      46 NE    Aero 45 MPH NE
12/20 20/11/16/-14/.../../000/00     30 NNW
12/21 33/17/25/-5/.../../000/00      43 W     Aero 44 MPH W
12/22 22/12/17/-12/0.00/0.0/544/100  47 W     Aero 45 MPH W
12/23 27/9/18/-11/0.00/0.0/.../..    30 W
12/24 50/23/37/+8/.../../.../..      53 S
 
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 25
HIGH 62 IN 1889
LOW -11 IN 1980
PRECIP 1.37 INS. IN 2002
SNOWFALL 8.5 INS. IN 2002
PEAK GUST 80 MPH NW IN 1971
 
RECORDS FOR DECEMBER 26
HIGH 58 IN 1973,1982
LOW -12 IN 1980
PRECIP 3.64 INS. IN 1969
SNOWFALL 17.5 INS. IN 1909
PEAK GUST 84 MPH SSE IN 1957
 
TODAY'S REPORT PREPARED By: Andrew Hoell