BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 25, 2008  
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
Today's observations:
 
8 A.M. EDT
Weather: Clear
Temperature: 54F, Dew point: 31F,  Wind: NNW at 5 kt
Wind: Wind light and variable
Sea-level pressure: 30.20 inches Hg, rising 
Visibility: 45 miles        
6-hour min temp: 47F
BHO SA 1155 CLR 45 228/54/31/3405/020/ 
FEW THN CI ALQDS K LYR ALNG HRZN S-NE WND L/V/ 
8/001 53017 10054 20047
 
11 A.M. EDT
Weather: Thin scattered cirrus
Temperature: 63F, Dew point: 26F, Wind: Variable at 9 kt 
Sea-level pressure: 30.15 inches Hg, falling 
Visibility: 45 miles 
BHO SA 1455 250 –SCT 45 211/63/26/3209/015/ WND 20V36/ 8/001 56017
 
2 P.M. EDT
Weather: Broken cirrus
Temperature: 68F, Dew point: 28F, Wind: W at 9 kt 
Sea-level pressure: 30.08 inches Hg, falling
Visibility: 40 miles  
6-hourly max. temp. 70F 
BHO SA 1755 200 SCT 250 –BKN 40 186/68/28/2709/008/ WND 24V07/ 8/008 
56025 10070 20054
 
WEATHER SUMMARY FOR THURSDAY, APRIL 24
 
TEMPERATURE (DEGREES F)
MAX.....72    NORMAL.....59
MIN.....53    NORMAL.....40
MEAN....63    NORMAL.....49
DEPARTURE FROM 30-YEAR NORMAL...........+14 
TOTAL DEPARTURE FOR THE MONTH...........+97 [+3.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............2  DEPARTURE.......-14
TOTAL HEATING UNITS FOR THE MONTH...........380  DEPARTURE.......-95 
TOTAL HEATING UNITS FOR THE SEASON.........5517  DEPARTURE......-422
TOTAL HEATING UNITS LAST SEASON TO DATE....5531  DIFFERENCE......-14
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............38 WNW AT  2:08 P.M.    
                   AEROVANE.............39 WNW AT  2:08 P.M.      
                   ASOS.................38 NW  AT  2:09 P.M.         
                   DAVIS................38 W   AT 11:03 A.M.        
FASTEST MILE FOR YESTERDAY..............25 WNW AT  2:05 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE...........25 NW  AT  2:05 P.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 WNW AT 11:05 A.M.        
                   AVERAGE............15.3 NW 
                   ASOS...............15.1       
                   DAVIS..............15.5 WNW [303 deg]   
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...trace   DEPARTURE......-0.14  
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.52   DEPARTURE......-2.00
                         ASOS..............1.66 
TOTAL PRECIPITATION FOR THE YEAR..........19.12   DEPARTURE......+1.97
                         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......-2.5
TOTAL SNOWFALL FOR THE SEASON.............66.5    DEPARTURE......+7.0
 
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/-3/0.71/0/000/00     35 E
4/5  51/37/44/+1/0.06/0/093/12     21 W
4/6  40/36/38/-5/0.09/0/000/00     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/+3/0/0/150/19        29 S    
4/10 71/44/58/+14/T/0/624/79       34 W
4/11 54/40/47/+2/0.03/096/13       24 SE 
4/12 70/43/57/+12/0.43/0/342/43    40 WNW   Aero 42 WNW
4/13 47/34/41/-4/T/0/104/13        30 NW 
4/14 53/30/42/-4/0/0/625/78        29 NW  
4/15 57/33/45/-1/0/0/803/100       23 SSE 
4/16 64/39/52/+6/0/0/806/100       24 SSE
4/17 64/14/53/+6/0/0/810/100       23 NE
4/18 70/42/56/+9/0/0/723/89        23 NW
4/19 70/46/58/+11/0/0/799/98       22 NE 
4/20 67/42/55/+7/0/0/760/93        25 ESE
4/21 61/41/51/+3/0/0/615/75        17 E
4/22 74/45/60/+11/0/0/789/96       23 S
4/23 83/50/67/+18/0/0/784/95       25 SW 
4/24 72/53/63/+14/0/0/.../..       38 WNW   Aero 39 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 25
HIGH 80 IN 1942
LOW 24 IN 1892
PRECIP 1.38 INCHES IN 1901
SNOWFALL 0.7 INCHES IN 2002
PEAK GUST 66 MPH SE IN 1968
 
RECORDS FOR APRIL 26
HIGH 83 IN 1908
LOW 23 IN 1919
PRECIP 1.64 INCHES IN 1931
SNOWFALL 1.0 INCHES IN 2000
PEAK GUST 53 MPH SSW IN 1996
 
TODAY'S REPORT PREPARED By: Andrew Hoell