BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 8, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
A SUNNY DAY WITH MUCH LIGHTER BUT STILL NORTHEAST WINDS 
TEMPERATURE IN THE MID-UPPER 40'S THIS AFTERNOON
 
Temperature rose to the mid and upper 40's today after 
a frosty start with heavy frost noted here at the summit
and other places.  The low temperature was 29.8 degrees. 
Northeast winds continue to prevail as they have for 
the past two days but the speeds are much lower and 
today's peaks have been only a little over 20 MPH.  
 
Today's observations:
 
8 A.M. EDT
Weather: Thin broken cirrus, thin fog 
Temperature: 34F, Dew point: 32F  Wind: N at 8 kts
Sea-level pressure: 30.43 inches Hg, rising
Visibility: 5 miles, 9 miles NW-N and 6 miles NE 
Thin fog
6-hour min temp: 30F
BHO SA 1155 250 –SCT 300 –BKN 5F 303/34/32/3608/043/
FEW STRA W-N VSBY NW-N 9 NE 6 HVY FROST WOOD/GRASSY SFCS/
8/001 53008 10034 20030
 
11 A.M. EDT
Weather: Clear, few stratocumuls and cirrus 
Temperature: 43F, Dew point: 33F, Wind: NNE at 12G18 kts,
Wind: variability in direction NNW-ENE  
Sea-level pressure: 30.43 inches Hg, steady
Visibility: 25 miles, 45 WNW, light haze   
BHO SA 1455 CLR 25 305/43/33/0212G18/043/ FEW SC AND CI 
LGT HZ ALQDS VSBY HIER SW-NW WNW 45 WND 34V07/ 8/501 51002
 
2 P.M. EDT
Weather: Thin scattered cirrus, few stratocumulus distant N-ESE
Temperature: 46F, Dew point: 33F, Wind: NE at 8 kts
Wind: variable direction N-ENE 
Sea-level pressure: 30.40 inches Hg, falling
Visibility: 45 miles, light haze, W-NW 55, NE-SE 30
6-hourly max.temp: 47F
BHO SA 1755 300 –SCT 45 295/46/33/0408/040/ FEW SC DSNT N-ESE 
LGT HZ VSBY W-NW 55 NE-SE 30 WND 35V07/ 8/501 58010 10047 20034   
 
WEATHER SUMMARY FOR MONDAY, APRIL 7
 
TEMPERATURE (DEGREES F)
MAX.....39    NORMAL.....52
MIN.....34    NORMAL.....34
MEAN....37    NORMAL.....43
DEPARTURE FROM 30-YEAR NORMAL...........-6 
TOTAL DEPARTURE FOR THE MONTH...........-4 [-0.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............28  DEPARTURE........+6
TOTAL HEATING UNITS FOR THE MONTH...........163  DEPARTURE........+4 
TOTAL HEATING UNITS FOR THE SEASON.........5300  DEPARTURE......-323
TOTAL HEATING UNITS LAST SEASON TO DATE....5196  DIFFERENCE.....+104  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............35 NE  AT  3:19 P.M. * 
                   AEROVANE.............36 NE  AT  7:43 A.M. *
                   ASOS.................35 ENE AT 11:50 A.M.  
                   DAVIS................33 NE  AT  6:58 A.M.   
FASTEST MILE FOR YESTERDAY............. 24 NE  AT 12:00 P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE...........24 NE  AT 12:00 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 ENE AT 12:00 P.M.  
AVERAGE WIND SPEED AND DIRECTION....... 14.9 NE    
                   ASOS.................14.0  
                   DAVIS................14.8 NE [050 deg] 
* Last of several occurrences.
 
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......+0.01
                         ASOS..............1.15
TOTAL PRECIPITATION FOR THE YEAR..........18.66   DEPARTURE......+3.98 
                         ASOS.............21.03
# 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.....-0.9
TOTAL SNOWFALL FOR THE SEASON...............66.5   DEPARTURE.....+8.7
 
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/.../..        35 NE    Aero 36 MPH NE
 
4/8  morning low temp. 30F; our normal low is now 35F
 
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 8
HIGH 87 IN 1991
LOW 17 IN 1888
PRECIP 1.78 IN. IN 1956
SNOWFALL 9.3 IN. IN 1956
PEAK GUST 70 MPH S IN 2000
 
RECORDS FOR APRIL 9
HIGH 83 IN 1991
LOW 18 IN 1888
PRECIP 2.38 IN. IN 1935
SNOWFALL 11.0 IN. IN 1917
PEAK GUST 72 MPH WNW IN 1962
 
TODAY'S REPORT PREPARED By: Robert Skilling