BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 4, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
Today's observations:
 
OVER ONE HALF INCH OF RAINFALL BY EARLY THIS AFTERNOON
EAST WINDS INCREASING AND GUSTING 30 TO 35 MPH
 
The light to occasionally moderate rain which began 
early this morning totaled close to 0.60 inch by early
this afternoon.  Increasing easterly winds were gusting
up to 30 to 35 MPH with temperatures rising from a low 
of 34 degrees very early this morning to the lower 40's
early this afternoon.
 
8 A.M. EDT
Weather: Obscurement with heavy fog, light rain occurring  
Temperature: 37F, Dew point: 37F  Wind: E at 9 kts 
Sea-level pressure: 30.21 inches Hg, rising
Visibility: 1/16 mile, light rain, heavy fog
6-hour min temp: 34F
6-hour rainfall: 0.27 inch
24-hour rainfall: 0.27 inch
BHO SA 1155 W3 X 1/16R-F 229/37/37/1009/021/ 
WND GRDLY BACKING/ 8//// 56016 ASOS 60027 
MANUAL 6027/ ASOS 70027 MANUAL 70027 10037 20034
 
11 A.M. EDT
Weather: Obscurement with heavy fog, light rain occurring 
Temperature: 41F, Dew point: 41F, Wind: E at 16G24 kts
Sea-level pressure: 30.07 inches Hg, falling RAPIDLY 
Visibility: 1/16 mile light rain, heavy fog 
3-hour rainfall: 0.26 inch
BHO SA 1455 W2 X 1/16R-F 183/41/41/1016G24/007/ PRESFR/ 
8//// 58046 ASOS 60026 MANUAL 6026/ 
 
2 P.M. EDT
Weather: Obscurement with heavy fog, light rain occurring
Temperature: 42F, Dew point: 42F, Wind: E at 14G25 kts  
Sea-level pressure: 29.87 inches Hg, falling rapidly 
Visibility: 1/16 mile light rain, heavy fog
6-hourly max.temp: 42
6-hourly rainfall: 0.37 inch
BHO SA 1755 W2 X 1/16R-F 115/42/42/0914G25/987/ PRESFR 
PK WND 0930/44/ 8//// 56068 MANUAL 60037/ ASOS 60037 10042 20037
 

WEATHER SUMMARY FOR THURSDAY, APRIL 3
 
TEMPERATURE (DEGREES F)
MAX.....52    NORMAL.....51
MIN.....27    NORMAL.....33
MEAN....40    NORMAL.....42
DEPARTURE FROM 30-YEAR NORMAL...........-2 
TOTAL DEPARTURE FOR THE MONTH...........+9 [+2.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............25  DEPARTURE........+2
TOTAL HEATING UNITS FOR THE MONTH............61  DEPARTURE........-9 
TOTAL HEATING UNITS FOR THE SEASON.........5198  DEPARTURE......-336
TOTAL HEATING UNITS LAST SEASON TO DATE....5069  DIFFERENCE.....+129  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............37 SSW AT  2:07 P.M.   
                   AEROVANE.............37 SSW AT  2:07 P.M.  
                   ASOS.................37 SSW AT  2:07 P.M.  
                   DAVIS................40 SSW AT  2:06 P.M.  
FASTEST MILE FOR YESTERDAY..............24 SSW AT  2:07 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........23 S   AT  6:01 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........27 SSW AT  3:33 P.M.   
AVERAGE WIND SPEED AND DIRECTION......  13.7 SW    
                   ASOS.................13.1  
                   DAVIS................13.9 SW [230 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.27   DEPARTURE......+0.12  
                         ASOS..............0.27
TOTAL PRECIPITATION FOR THE MONTH..........0.47   DEPARTURE......+0.02
                         ASOS..............0.54
TOTAL PRECIPITATION FOR THE YEAR..........18.07   DEPARTURE......+3.99 
                         ASOS.............20.15  
# Includes erroneous ASOS precipitation data on 2/13/08.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M...........0.0   DEPARTURE.....-0.1
TOTAL SNOWFALL FOR APRIL.....................0.0   DEPARTURE.....-0.4
TOTAL SNOWFALL FOR THE SEASON...............66.5   DEPARTURE.....+9.2
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available, records not finalized
 
4/1  59/50/55/+14/0.20/0/000/00    54 S    Aero 58 MPH SSW  #
4/2  47/31/39/-3/0/0/.../..        52 W    Aero 51 MPH W
4/3  52/27/40/-2/0/0/.../..        37 SSW
 
4/4  morning low temp. 34F; our normal low is now 33F
 
# departure and precipitation corrected; reported incorrectly 
  on prior reports
 
NEW DAILY RECORDS FOR APRIL 2008
None to date.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR APRIL 4
HIGH 71 IN 1950
LOW 12 IN 1954
PRECIP 1.45 IN. IN 1987
SNOWFALL 3.7 IN. IN 1975
PEAK GUST 80 MPH WNW IN 1963
 
RECORDS FOR APRIL 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963
 
TODAY'S REPORT PREPARED By: Robert Skilling