BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 5, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Scattered cirrus, stratocumulus NE-E,
few cumulus fractus E, altocumulus NE-SE and W-N,
few altocumulus lenticularis E
Temperature: 3F, Dew point: -5F, Wind: WNW at 11 kts
Sea-level pressure: 30.14 inches Hg, rising
Visibility: 35 miles
6-hour minimum temperature: 3F
Snow depth on ground: 17 inches
BHO SA 1155 250 SCT 35 206/3/-5/3011/014/
SC LYR OFFSHR NE-E FEW CUFRA E AC NE-SE AND W-N
FEW ACSL E/ 8/541 4/017 53013 10008 20003
 
10 A.M.
Weather: Overcast cirrostratus, breaks in overcast NW and NE,
Few stratocumulus all quadrants
Temperature: 9F, Dew point: -3F, Wind: NW at 16G25 kts,
Wind: Peak Gust past hour 27 kts NW at 9:18 A.M.
Wind: direction variability from W to N 
Sea-level pressure: 30.16 inches Hg, rising
Visibility: 40 miles
BHO SA 1455 E220 OVC 40 212/9/-3/3116G25/016/ FEW SC ALQDS
BRKS IOVC NW AND NE PK WND 3127 WND 26V36/18/ 8/507 51006
 
1 P.M.  
Weather: Scattered stratocumulus, cirrus
Temperature: 15F, Dew point: -3F, Wind: WNW at 12G25 kts,
Wind: direction variability from WSW to NNW
Sea-level pressure: 30.12 inches Hg, falling
Visibility: 70 miles
6-hour maximum temperature: 15F 
BHO SA 1755 35 SCT 250 SCT 70 199/15/-3/2912G25/012/
WND 24V34/ 8/501 58013 10015 20003
 
WEATHER SUMMARY FOR WEDNESDAY, FEBRUARY 4
 
TEMPERATURE (DEGREES F)
MAX.....24    NORMAL.....34 
MIN.....10    NORMAL.....18
MEAN....17    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............-9
TOTAL DEPARTURE FOR THE MONTH..............+12 [+2.8 deg. per day]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............48  DEPARTURE.........+9
TOTAL HEATING UNITS FOR THE MONTH............144  DEPARTURE....... -12
TOTAL HEATING UNITS FOR THE SEASON..........3712  DEPARTURE........+20
TOTAL HEATING UNITS LAST SEASON TO DATE.....3341  DIFFERENCE......+371
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............37 WNW AT 11:42 P.M. *
                   AEROVANE.............35 WNW AT 11:41 P.M.
                   ASOS.................35 NW  AT 11:42 P.M.
                   DAVIS................36 WNW AT 11:41 P.M.
FASTEST MILE FOR YESTERDAY..............26 WNW AT 11:44 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........24 NNW AT 11:45 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 WNW AT 11:45 P.M.
                   AVERAGE............ 12.0 NNW 
                   ASOS................11.6
                   DAVIS...............12.3 WNW [293 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.........-0.11
                         ASOS...............0.45
TOTAL PRECIPITATION FOR THE YEAR............4.65  DEPARTURE.........-0.73
                         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.........+4.0
TOTAL SNOWFALL FOR THE SEASON..............61.6   DEPARTURE........+29.7
 
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  morning low temp. 3F; normal low temp now is 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 5
HIGH 65F IN 1991
LOW -14F IN 1918
PRECIP 1.55 INS. IN 2001
SNOWFALL 16.0 INS. IN 1907
PEAK GUST 67 MPH WNW IN 1969
 
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
 
TODAY'S REPORT PREPARED By: Stephanie Radner