BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 13, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 

Today's observations:
 
8 A.M. EDT
Weather: Scattered stratocumulus and altocumulus
Temperature: 44F, Dew point: 39F  Wind: NNW at 6 kt
Sea-level pressure: 29.61 inches Hg, rising
Visibility: 12 miles
6-hour min temp: 42F
24-hour precipitation: 0.06 inches 
BHO SA 1155 55 SCT 120 SCT 12 027/44/39/3406/961/ 
HAZY/ 8/530 51017 70006 10045 20042
 
11 A.M. EDT
Weather: Overcast
Temperature: 45F, Dew point: 35F, Wind: NW at 9 kt 
Sea-level pressure: 29.63 inches Hg, rising
Visibility: 20 miles
BHO SA 1455 40 OVC 20 035/45/35/3109/063/ VIRGA DSNT NW/ 8/6// 53008
 
2 P.M. EDT
Weather: Overcast
Temperature: 41F, Dew point: 37F, Wind: NW at 10 kt 
Sea-level pressure: 29.65 inches Hg, rising
Visibility: 20 miles
6-hourly max.temp: 50F
BHO SA 1755 30 BKN 50 OVC 20 040/41/37/3010/965/ 
FEW BINOVC N HIER CLDS VSBL/ 8/6/ 51005 6000 10050 20041
  
WEATHER SUMMARY FOR SATURDAY, APRIL 12
 
TEMPERATURE (DEGREES F)
MAX.....70    NORMAL.....54
MIN.....43    NORMAL.....36
MEAN....57    NORMAL.....45
DEPARTURE FROM 30-YEAR NORMAL..........+12 
TOTAL DEPARTURE FOR THE MONTH..........+21 [+1.6 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............8  DEPARTURE.......-12
TOTAL HEATING UNITS FOR THE MONTH...........241  DEPARTURE.......-21 
TOTAL HEATING UNITS FOR THE SEASON.........5378  DEPARTURE......-348
TOTAL HEATING UNITS LAST SEASON TO DATE....5335  DIFFERENCE......+43  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............40 WNW  AT  5:33 A.M. 
                   AEROVANE.............42 WNW  AT  5:35 A.M.
                   ASOS.................38 NW   AT  5:34 A.M. 
                   DAVIS................40 WNW  AT  5:33 A.M. 
FASTEST MILE FOR YESTERDAY............. 30 WNW  AT  5:35 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........29 NW   AT  5:35 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........30 WNW  AT  5:35 A.M. 
AVERAGE WIND SPEED AND DIRECTION.......9.0 SE    
                   ASOS...............10.1  
                   DAVIS...............9.0 ESE [117 deg]  
* Last of several occurrences.
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06   DEPARTURE......-0.09  
                         ASOS..............0.08
TOTAL PRECIPITATION FOR THE MONTH..........1.52   DEPARTURE......-0.28
                         ASOS..............1.66 
TOTAL PRECIPITATION FOR THE YEAR..........19.12   DEPARTURE......+3.69
                         ASOS.............21.54 #
# 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......-1.3
TOTAL SNOWFALL FOR THE SEASON.............66.5    DEPARTURE......+8.3
 
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 54/40/47/+2/.../0/.../..      24 SE 
4/12 70/43/57/+12/.../0/.../..     40 WNW   Aero 42 WNW
 
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 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 INCHES IN 2004
SNOWFALL 6.8 INCHES IN 1933
PEAK GUST 59 MPH SSW IN 1995
 
RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 INCHES IN 1895
SNOWFALL 8.4 INCHES IN 1953
PEAK GUST 71e MPH W IN 1943

TODAY'S REPORT PREPARED By: Andrew Hoell