BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 6, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Broken altocumulus, overcast cirrus,
stratocumulus layer offshore NE-E, break in overcast E-S
Temperature: 6F, Dew point: -3F, Wind: WSW at 9 kts
Sea-level pressure: 30.34 inches Hg, rising
Visibility: 25 miles, thin fog/haze
6-hour minimum temperature: 4F
Snow depth on ground: 16 inches
BHO SA 1155 E120 BKN 250 OVC 25 275/6/-3/2509/034/
SC LYR OFFSHR NE-E BINOVC DSNT E-S THN FH/
8/571 4/016 52010 10006 20004
 
10 A.M.
Weather: Overcast altocumulus
Temperature: 16F, Dew point: 2F, Wind: W at 9 kts
Sea-level pressure: 30.37 inches Hg, rising
Visibility: 20 miles, light haze
BHO SA 1455 E140 OVC 20 285/16/2/2609/037/
LGT HZ/ 8/07/ 51010
 
1 P.M.  
Weather: Clear, few cirrus SW-W
Temperature: 24F, Dew point: 7F, Wind: WSW at 10 kts
Wind: direction variability from S-WNW
Sea-level pressure: 30.33 inches Hg, falling
Visibility: 35 miles, light haze
6-hour maximum temperature: 24F 
BHO SA 1755 CLR 35 270/24/7/2510/033/
FEW CI SW-W LGT HZ WND 17V30/ 8/001 58015 10024 20006
 
WEATHER SUMMARY FOR THURSDAY, FEBRUARY 5
 
TEMPERATURE (DEGREES F)
MAX.....17    NORMAL.....34 
MIN......3    NORMAL.....19
MEAN....10    NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL..............-17
TOTAL DEPARTURE FOR THE MONTH...............-5 [-1.2 deg. per day]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............55  DEPARTURE........+16
TOTAL HEATING UNITS FOR THE MONTH............199  DEPARTURE.........+4
TOTAL HEATING UNITS FOR THE SEASON..........3767  DEPARTURE........+36
TOTAL HEATING UNITS LAST SEASON TO DATE.....3367  DIFFERENCE......+400
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............33 W   AT  3:26 P.M. *
                   AEROVANE.............32 W   AT  3:26 P.M.
                   ASOS.................32 NW  AT  3:26 P.M.
                   DAVIS................33 W   AT  3:19 P.M.
FASTEST MILE FOR YESTERDAY..............26 WNW AT  2:24 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........23 NW  AT  3:27 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 W   AT  3:25 P.M.
                   AVERAGE............ 15.9 WNW
                   ASOS................14.6
                   DAVIS...............15.9 WNW [290 DEGREES]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.........-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.49  DEPARTURE.........-0.26
                         ASOS...............0.45
TOTAL PRECIPITATION FOR THE YEAR............4.65  DEPARTURE.........-0.88
                         ASOS...............5.65 #
# Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.7
TOTAL SNOWFALL FOR THE MONTH................6.5   DEPARTURE.........+3.3
TOTAL SNOWFALL FOR THE SEASON..............61.6   DEPARTURE........+29.0
 
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2009 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
 
2/1  45/15/30/+4/0/0/.../..          35 SW
2/2  50/32/41/+15/0/0/.../..         29 NNW
2/3  33/22/28/+2/0.44/5.6/000/00     39 N    AERO 38 MPH N 
2/4  24/10/17/-9/0.05/0.9/.../..     37 WNW
2/5  17/3/10/-17/0/0/.../..          33 W
 
2/6  morning low temp. 4F; normal low now 19F
 
NEW DAILY RECORDS FOR FEBRUARY 2009...
 
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 6
HIGH 54F IN 1909
LOW -10F IN 1895
PRECIP 1.88 INS. IN 1896
SNOWFALL 13.0 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 84e MPH NE IN 1978
 
RECORDS FOR FEBRUARY 7
HIGH 51F IN 1951,1953
LOW -8F IN 1910
PRECIP 2.12 INS. IN 1983
SNOWFALL 17.1 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 87e MPH SSE IN 1951
 
TODAY'S REPORT PREPARED By: Stephanie Radner