BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 12, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WINDY AND WARM WEATHER, BUT NO NEW RECORDS
 
Yesterday's high temperature of 59F was one degree
short of the record for the date of 60F in 1981.
Today's high temperature so far is only 51F, several
degrees lower than the record of 56F in 1999. 
 
Very gusty winds have been blowing since just after
noon with several gusts over 50 MPH observed as well
as hourly average wind speeds very close to 30 MPH
for most of the afternoon.  The peak gust so far
today of 53 MPH from the west occurred at 12:14 P.M.
 
Very low pressure has been observed since early this
morning.  The pressure at 12:00 noon was 29.13 inches
Hg (corrected to Sea Level Pressure).  This is the
lowest pressure observed since 28.91 inches Hg on
December 16, 2007.
 
Today's observations:
 
7 A.M.
Weather: Scattered altocumulus, few stratocumulus NE
Temperature: 47F, Dew point: 45F, Wind: SSW at 16G24 kts
Wind: Peak gust past hour 26 kts SW at 6:41 A.M.
Sea-level pressure: 29.18 inches Hg, falling
Visibility: 10 miles, thin fog 
6-hour minimum temperature: 43F
Snow depth on ground: 2 inches
BHO SA 1155 80 SCT 10 882/47/45/2116G24/918/ FEW SC NE THN F
PK WND 2226/41/ 8/150 4/002 56029 MANUAL 6013/ ASOS 60017
MANUAL 70013 ASOS 70017 10047 20043
 
10 A.M.
Weather: Overcast stratocumulus, numerous small breaks in
overcast with higher clouds visible
Temperature: 50F, Dew point: 40F, Wind: SW at 18G30 kts,
Wind: Peak gust past hour 31 kts WSW at 8:55 A.M.
Sea-level pressure: 29.13 inches Hg, falling
Visibility: 50 miles
BHO SA 1455 E45 OVC 50 865/50/40/2318G30/913/
NMRS SML BRKS IOVC HIER CLDS VSBL PK WND 2431/1355/
8/5// 58017
 
1 P.M.  
Weather: Broken stratocumulus, overcast altocumulus
Temperature: 46F, Dew point: 32F, Wind: WSW at 18G34 kts,
Wind: Peak gust past hour 46 kts W at 12:14 P.M.
Sea-level pressure: 29.13 inches Hg, falling
Visibility: 80 miles
6-hour maximum temperature: 51F
BHO SA 1755 E40 BKN 75 OVC 80 864/46/32/2518G34/913/
PK WND 2646/14/ 8/57/ 55001 10051 20046
 
WEATHER SUMMARY FOR WEDNESDAY, FEBRUARY 11
 
TEMPERATURE (DEGREES F)
MAX.....59    NORMAL.....35
MIN.....34    NORMAL.....20
MEAN....47    NORMAL.....27
 
DEPARTURE FROM 30-YEAR NORMAL................+20
TOTAL DEPARTURE FOR THE MONTH................+22 [+1.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............18  DEPARTURE........-20
TOTAL HEATING UNITS FOR THE MONTH............400  DEPARTURE........-24
TOTAL HEATING UNITS FOR THE SEASON..........3968  DEPARTURE.........+8
TOTAL HEATING UNITS LAST SEASON TO DATE.....3591  DIFFERENCE......+377
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29 SSE  AT  6:57 P.M.
                   AEROVANE.............24 SSE AT  6:57 P.M.
                   ASOS.................26 SSW AT  7:03 P.M.  
                   DAVIS................20  S  AT  7:02 P.M.   
FASTEST MILE FOR YESTERDAY..............22 SSE AT  7:03 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........21 SSW AT 11:11 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20  S  AT 10:53 P.M.   
                   AVERAGE............  12.5 SSE
                   ASOS.................12.4
                   DAVIS................11.5 SSW [198 DEGREES]
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.13  DEPARTURE.........-0.01
                         ASOS...............0.17
TOTAL PRECIPITATION FOR THE MONTH...........0.62  DEPARTURE.........-0.99
                         ASOS...............0.62
TOTAL PRECIPITATION FOR THE YEAR............4.78  DEPARTURE.........-1.61
                         ASOS...............5.82 #
# 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.........-0.6
TOTAL SNOWFALL FOR THE MONTH................6.5   DEPARTURE.........-0.6
TOTAL SNOWFALL FOR THE SEASON..............61.6   DEPARTURE........+25.1
 
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/+4/0/0/402/67          35 SW
2/2  50/32/41/+15/0/0/568/94         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/-9/0.05/0.9/572/94     37 WNW
2/5  17/3/10/-17/0/0/538/88          33 W
2/6  26/4/15/-12/0/0/509/83          26 W
2/7  42/16/29/+2/0/0/314/51          45 S    AERO 44 MPH S
2/8  49/30/40/+13/0/0/433/70         54 W    AERO 54 MPH W
2/9  37/21/29/+2/0/0/621/100         38 WNW  AERO 38 MPH WNW
2/10 36/22/29/+2/0/0/.../..          21 SSE
2/11 59/34/47/+20/0/0/.../..         29 SSE  AERO 24 MPH SSE
 
2/12 morning low temp: 43F; our normal low is now 20F
 
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 12
HIGH 56F IN 1999
LOW -14F IN 1914
PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH]
SNOWFALL 15.0 INCHES IN 2006
PEAK GUST 70 MPH E IN 1985
 
RECORDS FOR FEBRUARY 13
HIGH 64F IN 1951
LOW -10F IN 1967
PRECIP 1.90 INCHES IN 1966
SNOWFALL 13.5 INCHES IN 1894
PEAK GUST 60 MPH SE IN 1972
 
TODAY'S REPORT PREPARED By: Stephanie Radner