BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 11, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
Today's observations:
 
8 A.M. EDT
Weather: Broken altocumulus, cirrus
Temperature: 45F, Dew point: 29F  Wind: NNW at 7 kts
Sea-level pressure: 30.12 inches Hg, rising
Visibility: 50 miles, 70 miles NW
6-hour min temp: 40F
BHO SA 1155 75 SCT E180 BKN 250 BKN 50 201/45/29/3407/012/ 
VSBY NW 70/ 8/071 51018 10046 20040
 
11 A.M. EDT
Weather: Overcast nimbostratus, few lower stratus, light rain
Temperature: 50F, Dew point: 27F, Wind: W at E2 kts
Wind: Light and variable 
Sea-level pressure: 30.10 inches Hg, falling
Visibility: 30 miles, higher NW-N-NE
3-hour precipitation: trace
BHO SA 1455 E95 OVC 30R- 194/50/27/E2702/010/ 
FEW LWR STFRA BINOVC DSNT N-NE VSBY HIER NW-N-NE 
RB55 WND L/V/ 8/72/ 56007 MANUAL 6000/
 
2 P.M. EDT
Weather: Overcast altocumulus 
Temperature: 52F, Dew point: 32F, Wind: SSW at 6 kts
Wind: Light and variable 
Sea-level pressure: 30.01 inches Hg, falling
Visibility: 35 miles 
6-hourly max.temp: 52F
6-hour precipitation: trace
BHO SA 1755 E140 OVC 35 163/52/32/2106/001/ 8/07/ 56031 
WND L/V/ MANUAL 6000/ ASOS 60001/ 10052 20045
  
WEATHER SUMMARY FOR THURSDAY, APRIL 10
 
TEMPERATURE (DEGREES F)
MAX.....71    NORMAL.....53
MIN.....44    NORMAL.....35
MEAN....58    NORMAL.....44
DEPARTURE FROM 30-YEAR NORMAL..........+14 
TOTAL DEPARTURE FOR THE MONTH...........+7 [+0.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............7  DEPARTURE.......-14
TOTAL HEATING UNITS FOR THE MONTH...........215  DEPARTURE........-7 
TOTAL HEATING UNITS FOR THE SEASON.........5352  DEPARTURE......-334
TOTAL HEATING UNITS LAST SEASON TO DATE....5281  DIFFERENCE......+71  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............34 W   AT 12:27 P.M.
                   AEROVANE.............33 W   AT 12:27 P.M. 
                   ASOS.................31 W   AT  1:14 P.M.   
                   DAVIS................33 W   AT 12:26 P.M.    
FASTEST MILE FOR YESTERDAY............. 25 WSW AT  1:14 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........24 W   AT  1:16 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........27 W   AT 12:50 P.M.   
AVERAGE WIND SPEED AND DIRECTION........14.0 S    
                   ASOS.................13.5  
                   DAVIS................14.3 WSW [249 deg] 
 
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..........1.06   DEPARTURE......-0.44
                         ASOS..............1.16 *
TOTAL PRECIPITATION FOR THE YEAR..........18.66   DEPARTURE......+3.53
                         ASOS.............21.04 *
# Includes erroneous ASOS precipitation data on 2/13/08.
* ASOS precipitation corrected by 0.01.
 
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.....-1.1
TOTAL SNOWFALL FOR THE SEASON...............66.5   DEPARTURE.....+8.5
 
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/-3/0/0/745/97        52 W    Aero 51 MPH W
4/3  52/27/40/-2/0/0/648/84        37 SSW 
4/4  43/34/39/-3/.../0/000/00      35 E
4/5  51/37/44/+1/.../0/000/00      21 W
4/6  40/36/38/-5/0.09/0/093/12     36 NE 
4/7  39/34/37/-6/0/0/172/22        35 NE    Aero 36 MPH NE
4/8  47/30/39/-5/0/0/627/80        22 NE
4/9  59/33/47/+3/0/0/.../..        29 S    
4/10 71/44/58/+14/T/0/.../..       34 W
 
4/11 morning low temp. 40F; normal low is now 36F
 
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 11
HIGH 78 IN 1945
LOW 19 IN 1909
PRECIP 1.72 IN. IN 2003
SNOWFALL 9.5 IN. IN 1958
PEAK GUST 65 MPH NW IN 1963
 
RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 12.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978
 
TODAY'S REPORT PREPARED By: Stephanie Radner