BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 11, 2008  
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
Today's observations:
 
8 A.M. EDT
Weather: Clear with a few clouds forming
Temperature: 49F, Dew point: 36F,  Wind: NNE at 13G18 kt 
Sea-level pressure: 29.92 inches Hg, rising
Visibility: 65 miles
6-hour min temp: 41F
BHO SA 1155 CLR 65 132/49/36/0113G18/992/ FEW SC FRMG ALQDS/ 
8/500 53017 10049 20041
 
11 A.M. EDT
Weather: Clear
Temperature: 56F, Dew point: 36F,  Wind: NE at 13G16 kt
Sea-level pressure: 29.91 inches Hg, falling
Visibility: 65 miles
BHO SA 1455 CLR 65 128/56/36/0413G16/991/ 8/000 58004
 
2 P.M. EDT
Weather: Thin scattered cirrus
Temperature: 55F, Dew point: 33F,  Wind: ENE at 12G15 kt 
Sea-level pressure: 29.89 inches Hg, falling  
Visibility: 65 miles
6-hour max temp: 57F
BHO SA 1755 250 –SCT 65 123/55/33/0612G15/989/ 8/001 55005 
10057 20049
 
WEATHER SUMMARY FOR SATURDAY, MAY 10
 
TEMPERATURE (DEGREES F)
MAX.....57    NORMAL.....65
MIN.....44    NORMAL.....45
MEAN....51    NORMAL.....55
DEPARTURE FROM 30-YEAR NORMAL............-4  
TOTAL DEPARTURE FOR THE MONTH...........-11 [-0.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............14  DEPARTURE........+4
TOTAL HEATING UNITS FOR THE MONTH...........126  DEPARTURE........+8 
TOTAL HEATING UNITS FOR THE SEASON.........5737  DEPARTURE......-407  
TOTAL HEATING UNITS LAST SEASON TO DATE....5699  DIFFERENCE......+38
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............35 NNE  AT  7:35 A.M.
                   AEROVANE.............30 NNE  AT  7:30 A.M.  
                   ASOS.................31 NNE  AT  7:35 A.M. 
                   DAVIS................30 NNE  AT  7:35 A.M. 
FASTEST MILE FOR YESTERDAY..............20 N    AT  6:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........20 NNE  AT  8:35 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 NN   AT  6:35 A.M. 
                   AVERAGE............12.0 N 
                   ASOS...............11.7    
                   DAVIS..............12.4 NNE [19 deg]   
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE......-0.12  
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.67   DEPARTURE......-0.58
                         ASOS..............0.62
TOTAL PRECIPITATION FOR THE YEAR..........21.43   DEPARTURE......+2.23
                         ASOS.............23.85 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR MAY 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available, records not finalized
 
5/1  60/35/48/-4/0/786/93        30 W    Aero 28 W
5/2  48/42/45/-7/0.07/000/00     21 ENE
5/3  43/41/42/-11/0.09/000/00    25 E    
5/4  50/42/46/-7/0.17/000/00     27 E
5/5  69/40/55/+2/0/.../..        24 ESE  
5/6  74/46/60/+6/0/.../..        25 W
5/7  75/48/62/+8/0/.../..        29 S
5/8  75/54/65/+11/0.08/.../..    42 W
5/9  56/43/50/-5/0.26/.../..     30 NE
5/10 57/44/51/-4/0/.../..        35 NNE 
 
NEW DAILY RECORDS FOR MAY 2008
None to date.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MAY 11
HIGH 90F IN 1993
LOW 28F IN 1900
PRE 1.28 INCHES IN 1957
SNOW 1.0 INCHES IN 1907 (LATEST MEASURABLE SNOW ON RECORD)
PEAK GUST 75e MPH NW IN 1945
 
RECORDS FOR MAY 12
HIGH 88F IN 2001
LOW 29F IN 1907
PRECIP 1.49 INCHES IN 1968
PEAK GUST 76 MPH S IN 1974
 
TODAY'S REPORT PREPARED By: Andrew Hoell