BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JUNE 2, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM, HUMID AND PARTLY SUNNY TODAY...THUNDERSTORMS 
ON FRIDAY BRING MINOR RAINFALL...A SEVERE THUNDERSTORM 
WATCH IS IN EFFECT FOR THIS AFTERNOON...
The temperature has reached the mid-80s as of early this
afternoon, with a dew point in the low to mid-60s. 
Visibility has been poor and under ten miles all day.
There were two thunderstorms on Friday, one in the early 
morning and another in late afternoon near 5:30 PM EDT.  
The first brought no rain and the second just 0.12 inch 
with a peak gust to 45 mph NNW. There was some tree and
power line damage in Canton a mile or two south of the hill 
in the afternoon thunderstorm.  Additional thunderstorms
are possible this afternoon. 

MAY 2007 MONTHLY SUMMARY  

Mean temp: 59.5 [+2.5] (All temps are in deg F) 
24-hour corrected mean: 58.8 
Av. Max. 69.9 [+2.9]
Av. Min. 49.0 [+2.0]
Max: 91/25th
Min: 39/7th
HDD: 215 [- 56]
CDD:  53 [+ 32]
Precip: 3.74 [-0.05 in.]
Av. uncorrected wind speed: 11.5 mph
Av. corr. wind speed:  11.9 mph 
Prevailing direction: S 15%
Peak wind gust: 40 mph NW on 16th 
Peak gust Maximum, Inc. 46 WNW on 4th 
Total sunshine (astronomical minutes) 17044 or 63% 
  
Today's observations:

7 A.M.   
Weather: Broken stratocumulus and overcast altocumulus 
Temperature: 69F, Dew point: 62F, Wind: W at 8 kts 
Sea-level pressure: 29.95 inches Hg, rising 
Visibility: 7 miles, hazy      
6-hour min temp. 64F   
BHO SA 1155 E30 BKN 120 OVC 7 142/69/62/2708/995/ HAZY 
BINOVC N-NE WND LGT/ 8/57/ 52010 70012 10069 20064

10 A.M. 
Weather: Overcast stratocumulus with a few breaks 
Temperature: 75F, Dew point: 64F, Wind: SW at 5 kts
Sea-level pressure: 29.96 inches Hg, rising
Visibility: 8 miles, hazy
BHO SA 1455 E35 BKN 50 OVC 8 145/75/64/2405/996/ HAZY 
FEW BINOVC OVHD FEW HIR CLDS VSB/ 8/57/ 53003

1 P.M. 
Weather: Scattered altocumulus and thin broken cirrus
Temperature: 85F, Dew point: 61F, Wind: SW at 6 kts
Sea-level pressure: 29.91 inches Hg, falling
Visibility: 10 miles, hazy 
6-hour max. temp. 85 deg. 
BHO SA 1755 100 SCT 250 –BKN 10 128/85/61/2306/991/ 
HAZY WND LGT AND VRB/ 8/031 56017 10085 20069


WEATHER SUMMARY FOR FRIDAY, JUNE 1  

TEMPERATURE (DEGREES F)
MAX.....87    NORMAL.....72 
MIN.....56    NORMAL.....52
MEAN....72    NORMAL.....62
DEPARTURE FROM 30-YEAR NORMAL..........+10
TOTAL DEPARTURE FOR THE MONTH..........+10 (+10.0 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-5
TOTAL HEATING UNITS FOR THE MONTH............0  DEPARTURE.........-5  
TOTAL HEATING UNITS FOR THE SEASON........5831  DEPARTURE.......-471
TOTAL HEATING UNITS LAST SEASON TO DATE...5714  DIFFERENCE......+117  

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............45  NNW AT 4:37 P.M.
                   AEROVANE.............44  NNW AT 4:37 P.M.
                   ASOS.................43  NNW AT 4:37 P.M.
                   DAVIS................42  WNW AT 4:36 P.M.
FASTEST MILE FOR YESTERDAY..............31  NNW AT 4:35 P.M.          
MAXIMUM 2-MINUTE ASOS AVERAGE...........28  NNW AT 4:37 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE..........31  WNW AT 4:37 P.M.
AVERAGE WIND SPEED AND DIRECTION........11.8 SW  
                   ASOS.................11.0  
                   DAVIS................10.8 SW [218]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.12  DEPARTURE.....-0.01
                         ASOS..............0.11  
TOTAL PRECIPITATION FOR THE MONTH..........0.12  DEPARTURE.....-0.01 
                         ASOS..............0.11    
TOTAL PRECIPITATION FOR THE YEAR..........24.28  DEPARTURE.....+2.41
                         ASOS.............23.75    
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2007......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
 
6/1  87/56/72/+10/0.12/.../..      45 NNW  Aero 44 MPH  TSTM AM/PM

6/2  morning low temp. 64 deg; normal low now 52 deg. 
      
NEW DAILY RECORDS FOR JUNE: none


DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JUNE 2
HIGH 91F IN 1895
LOW 41F IN 1907, 1929
PRECIP 2.36 INS IN 1982
PEAK GUST 63 MPH NW IN 2000

RECORDS FOR JUNE 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998

TODAY'S REPORT PREPARED By: Mike Iacono  

If you do not wish to receive this Daily Discussion and 
Climate Summary from the Blue Hill Observatory, please 
send an email to sitemaster@bluehill.org.