BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 9, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
2ND FEBRUARY THAW BRINGS MONTHLY TEMPERATURE
AVERAGE BACK TO NEAR NORMAL AFTER COLD SNAP
STRONG WEST WINDS GUSTED OVER 50 MPH YESTERDAY
SNOW DEPTH ON GROUND MELTED DOWN TO 8 INCHES
 
Temperatures rose to a high of 49F late yesterday
morning with sunny weather and very gusty west winds.
The departure in temperature for the day erased much
of a negative departure which was the result of a
cold spell late last week.  The result is that the
month is now only one half degree colder than normal.
Very gusty west winds accompanied the arrival of colder
and much drier air by noon yesterday.  Peak gusts
reached 54 MPH during the late morning and early 
in the afternoon. Hourly averages were 30 to 31 MPH
with a fastest mile to 42 MPH recorded at 12:42 p.m.
The mild weekend weather melted down a 14-inch
snow cover on Saturday to 8 inches as measured this
morning. 
 
Today's observations:
 
7 A.M.
Weather: Clear, few stratocumulus offshore distant ENE-ESE,
few stratocumulus distant SSE-SSW 
Temperature: 21F, Dew point: 8F, Wind: N at 7 kts
Sea-level pressure: 30.27 inches Hg, rising
Visibility: 55 miles
6-hour minimum temperature: 21F
Snow depth on ground: 8 inches
BHO SA 1155 CLR 55 252/21/8/3607/027/ FEW SC OFFSHR DSNT ENE-ESE 
AND FEW SC DSNT SSE-SSW/ 8/500 4/008 51026 10029 20021
 
10 A.M.
Weather: Clear, cumulus fractus forming
Temperature: 29F, Dew point: 10F, Wind: WSW at 4 kts,
Wind: light
Sea-level pressure: 30.33 inches Hg, rising
Visibility: 60 miles
BHO SA 1455 CLR 60 270/29/10/2604/033/ CUFRA FRMG ALQDS WND LGT/
8/100 500 51018
 
1 P.M.  
Weather: Clear, cumulus fractus, cumulus all parts of the sky
Temperature: 35F, Dew point: 15F, Wind: W at 14G22 kts,
Wind: Peak gust 27 kts W at 12:34 p.m.,
Wind: direction variable WSW-NW
Sea-level pressure: 30.31 inches Hg, falling
Visibility: 75 miles
6-hour maximum temperature: 35F 
BHO SA 1755 CLR 75 263/35/15/2813G22/031/ CUFRA/CU ALQDS PK WND 
2627/34/ WND 24V31/ 8/100 58007 10035 20021
 
WEATHER SUMMARY FOR SUNDAY, FEBRUARY 8
 
TEMPERATURE (DEGREES F)
MAX.....49    NORMAL.....35 
MIN.....30    NORMAL.....19
MEAN....40    NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL.............+13
TOTAL DEPARTURE FOR THE MONTH.............- 2 [-0.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............25  DEPARTURE........-13
TOTAL HEATING UNITS FOR THE MONTH............310  DEPARTURE........+ 0
TOTAL HEATING UNITS FOR THE SEASON..........3878  DEPARTURE........+32
TOTAL HEATING UNITS LAST SEASON TO DATE.....3466  DIFFERENCE......+412
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............54 W   AT  1:28 P.M.
                   AEROVANE.............54 W   AT 11:08 A.M.
                   ASOS.................53 W   AT 12:41 P.M.
                   DAVIS................49 WSW AT 12:40 P.M.
FASTEST MILE FOR YESTERDAY..............42 W   AT 12:42 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........39 W   AT 12:42 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........38 W   AT 12:42 P.M. 
                   AVERAGE............22.3 W
                   ASOS...............20.5
                   DAVIS..............20.7 WSW [250 DEGREES]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.........-0.14
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.49  DEPARTURE.........-0.70
                         ASOS...............0.45
TOTAL PRECIPITATION FOR THE YEAR............4.65  DEPARTURE.........-1.32
                         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.........+1.2
TOTAL SNOWFALL FOR THE SEASON..............61.6   DEPARTURE........+26.9
 
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  26/4/15/-12/0/0/.../..          26 W
2/7  42/16/29/+2/0/0/.../..          45 S    AERO 44 MPH S
2/8  49/30/40/+13/0/0/.../..         54 W    AERO 54 MPH W
 
2/9  morning low temp. 21F; our normal low is 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 9
HIGH 58F IN 1990
LOW -21F IN 1934 [LOWEST TEMPERATURE ON RECORD]
PRECIP 2.12 INS. IN 1969
SNOWFALL 13.0 INS. IN 1969
PEAK GUST 89 MPH NE IN 1969
 
RECORDS FOR FEBRUARY 10
HIGH 56F IN 1909
LOW -8F IN 1899
PRECIP 1.34 INS. IN 1909
SNOWFALL 12.1 INS. IN 1926
PEAK GUST 64 MPH W IN 2001
 
TODAY'S REPORT PREPARED By: Robert Skilling