BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 6, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Broken altocumulus, overcast altostratus,
break in overcast distant SW, thin spots in overcast
SW-NW, VIRGA visible distant NW, thin fog
Temperature: 38F, Dew point: 35F, Wind: S at 23G30 kts
Wind: Peak gust past hour 32 kts S at 6:32 A.M.
Sea-level pressure: 30.16 inches Hg, falling
Visibility: 12 miles, thin fog, higher SW-NW
6-hour minimum temperature: 31F
6-hourly precipitation: Trace
Snow depth on ground: 6 inches 
BHO SA 1155 E70 BKN 80 OVC 12 214/38/35/1723G30/016/
BINOVC DSNT SW THN SPTS IOVC SW-NW VIRGA DSNT NW THN F
VSBY HIER SW-W RB25E45 PK WND 1732/23/ 8/07/ 4/006
56025 MANUAL 6000/ 10038 20031
 
10 A.M.
Weather: Broken altocumulus, overcast cirrus,
thin spots in overcast
Temperature: 46F, Dew point: 32F, Wind: S at 18G32 kts
Wind: Peak gust past hour 34 kts S at 9:35 A.M.
Sea-level pressure: 30.10 inches Hg, falling
Visibility: 10 miles, hazy
BHO SA 1455 E140 BKN 250 OVC 10 192/46/32/1818G32/010/
THN SPTS IOVC HAZY PK WND 1834/35/ 8/031 58022
 
1 P.M.  
Weather: Overcast stratocumulus
Temperature: 47F, Dew point: 30F, Wind: S at 18G30 kts
Wind: Peak gust past hour 30 kts S at 12:50 P.M.
Sea-level pressure: 30.00 inches Hg, falling
Visibility: 20 miles, light haze, visibility higher S-W-NW
6-hour maximum temperature: 47F
BHO SA 1755 E45 OVC 20 158/47/30/1718G30/000/
VSBY S-W-NW 25 LGT HZ PK WND 1830/50/ 8/5// 58034 10047 20038
 
WEATHER SUMMARY FOR THURSDAY, MARCH 5, 2009
 
TEMPERATURE (DEGREES F)
MAX.....39    NORMAL.....41
MIN.....16    NORMAL.....25
MEAN....28    NORMAL.....33
 
DEPARTURE FROM 30-YEAR NORMAL..................-5
TOTAL DEPARTURE FOR THE MONTH.................-54 [-11.0 per day] 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............37  DEPARTURE.........+5
TOTAL HEATING UNITS FOR THE MONTH............217  DEPARTURE........+52
TOTAL HEATING UNITS FOR THE SEASON..........4744  DEPARTURE.........+9
TOTAL HEATING UNITS LAST SEASON TO DATE.....4415  DIFFERENCE......+329
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............25 WSW AT  2:17 P.M.
                   ASOS.................23 SSW AT 11:38 P.M.
                   AEROVANE.............23 S   AT 11:36 P.M.
                   DAVIS................24 S   AT  8:17 P.M.
FASTEST MILE FOR YESTERDAY..............19 S   AT 11:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........18 SSW AT 10:56 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 S   AT 11:56 P.M.
                   AVERAGE............11.4 W
                   ASOS...............11.0
                   DAVIS..............10.7 SW  [227 DEGREES]
  
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace DEPARTURE.........-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........1.48 DEPARTURE.........+0.73
                         ASOS...............1.34
TOTAL PRECIPITATION FOR THE YEAR............8.01 DEPARTURE.........-1.58
                         ASOS...............8.96 #
# Includes erroneous ASOS precipitation data on 1/1/09, 1/2/09 and 2/27/09.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.5
TOTAL SNOWFALL FOR THE MONTH...............10.2   DEPARTURE.........+7.7
TOTAL SNOWFALL FOR THE SEASON..............75.5   DEPARTURE........+27.6
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 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
 
3/1  28/21/25/-7/0.26/1.9/000/00     38 NNE
3/2  22/15/19/-13/1.16/8.2/000/00    40 NNE
3/3  25/11/18/-14/0.01/0.1/640/94    33 NW
3/4  30/6/18/-14/0/0/684/100         31 WNW
3/5  39/16/28/-5/0/0/659/96          25 WSW    
 
3/6  morning low temp. 30F; our normal low now 25F
 
NEW DAILY RECORDS FOR MARCH 2009...
3/2: DAILY SNOWFALL 8.2 INS. SURPASSES PREVIOUS
     RECORD OF 7.1 INS. IN 1948
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MARCH 6
HIGH 66 IN 1894
LOW 3 IN 1948, 2007
PRECIP 1.85 INS. IN 2001
SNOWFALL 15.5 INS. IN 2001
PEAK GUST 82 MPH S IN 1959
 
RECORDS FOR MARCH 7
HIGH 66 IN 1946
LOW -1 IN 1890
PRECIP 2.05 INS. IN 1967
SNOWFALL 11.1 INS. IN 1967
PEAK GUST 66 MPH NE IN 1962
 
TODAY'S REPORT PREPARED BY: Stephanie Radner