BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 22, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
COOL AND DRY TODAY WITH A CHANCE OF STORMS THIS EVENING
 
Cumulus clouds moved in from the northwest during
the late morning hours, with temperatures steadily
rising from a below-average low of 54 degrees this 
morning to 70 degrees early this afternoon. A brief,
light shower passed through the area at 1:20 EDT 
bringing minimal precipitation. Winds have prevailed 
from the west to west-northwest with our peak wind gusts 
around 30 to 33 MPH.
 
Today's observations:
 
7 A.M.   
Weather: Clear, Few Small Cumulus in distance
Temperature: 60F, Dew point: 53F, Wind: WNW at 15G20 kts 
Sea-level pressure: 29.71 inches Hg, increasing
Visibility: 70 miles 
6-hour min temp. 55F   
24-hour precip: 0.23 in. 
BHO SA 1155 CLR 70 060/60/53/2915G20/971/
CLR SM CU DSNT W-N / 8/100 50002 
ASOS 70021 MANUAL 70023 10059 20055 
        
10 A.M. 
Weather: Moderate cumulus   
Temperature: 65F, Dew point: 51F, Wind: W at 15G18 kts
Sea-level pressure: 29.85 inches Hg, falling 
Visibility: 70 miles  
BHO SA 1455 40 SCT 70 053/65/51/2814G18/969/ 
MOD CU ALQDS / 8/200 56007
 
1 P.M. 
Weather: Scattered cumulus clouds  
Temperature: 70F, Dew point: 51F, Wind: WNW at 14G16 kts
Sea-level pressure: 29.67 inches Hg, falling
Visibility: 30 miles 
6-hour max. temp. 70 deg.      
6-hour precip: 0.00 in. 
BHO SA 1755 20 SCT 30 047/70/51/2914G16/967/ 
RAIN SHAFT N-NW CL DSNT CU CONG FRMING 
MOD CU ALQDS/ 8/200 58010 10071 20059
 

WEATHER SUMMARY FOR THURSDAY, JUNE 21
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....77 
MIN.....56    NORMAL.....57
MEAN....67    NORMAL.....67
DEPARTURE FROM 30-YEAR NORMAL............ 0
TOTAL DEPARTURE FOR THE MONTH............-6 (-0.5 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH...........71  DEPARTURE........+ 7   
TOTAL HEATING UNITS FOR THE SEASON........5902  DEPARTURE.......-459
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE......+112 *
 
* corrected 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............30 WSW AT 1:55 P.M. *    
                   AEROVANE.............28 WSW   AT 1:55 P.M.  
                   ASOS.................N/A  #
                   DAVIS................31 SW   AT 4:44 P.M.       
FASTEST MILE FOR YESTERDAY..............21 W   AT 4:38 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........22 WSW   AT 5:40 P.M.         
AVERAGE WIND SPEED AND DIRECTION........12.4 W  
                   ASOS.................N/A  #
                   DAVIS................12.7 W [268 deg] 
 
# ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN 
THAT DATA WILL RESUME
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.23  DEPARTURE.....+0.35
                         ASOS..............0.21  
TOTAL PRECIPITATION FOR THE MONTH..........2.58  DEPARTURE.....-0.19 
                         ASOS..............2.56    
TOTAL PRECIPITATION FOR THE YEAR..........26.74  DEPARTURE.....+2.23 
                         ASOS.............26.20   
 
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/+10/0.12/660/73       45 NNW  Aero 44 MPH TSTM AM/PM
6/2  87/64/76/+14/0.01/290/32       23 SSE  TSTM PM    
6/3  68/50/59/-3/0.14/000/000       24 NNE  TSTM AM (no rain)
6/4  63/50/57/-6/1.52/000/00        35 NE   TSTM 10:15-10:50 A.M. 
6/5  78/57/68/+5/0.01/455/50        38 S   
6/6  70/49/60/-3/0/637/70           35 W   
6/7  69/44/57/-7/0/528/58           23 W
6/8  78/58/68/+4/0/748/82           20 WSW
6/9  63/54/59/-5/0.02/000/00        18 ENE
6/10 70/50/60/-4/0/831/91           22 ENE 
6/11 77/62/70/+5/0.04/594/65        29 NE    
6/12 70/56/63/-2/0.09/192/21        29 NNE
6/13 56/50/53/-12/0.01/000/00       42 NNE   Aero 40 MPH NNE 
6/14 59/49/54/-11/0/036/04          34 NNE   
6/15 69/46/58/-8/0/769/84           21 NNE
6/16 80/55/68/+2/0/577/63           25 SW   
6/17 85/58/72/+6/T/632/69           31 W   
6/18 79/60/70/+4/0/880/96           23 NW
6/19 84/62/73/+6/0/578/63           25 SSW
6/20 74/60/67/0/0.38/000/00         25 W
6/21 77/56/67/0/0.23/823/90         30 WSW
 
6/22 morning low temp. 54 deg; normal low 57 deg.   
 
NEW DAILY RECORDS FOR JUNE: 
 
6/4 - NEW RECORD DAILY RAINFALL OF 1.52 INS; THE PREVIOUS 
      RECORD WAS 1.29 INS. IN 1898.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 22
HIGH 93F IN 1921
LOW 43F IN 1940
PRECIP 1.57 INS IN 1900
PEAK GUST 74 MPH NW IN 1988
 
RECORDS FOR JUNE 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.70 INS IN 2006
PEAK GUST 63 MPH SE IN 1972 (AGNES)

TODAY'S REPORT PREPARED By: Nate Magee and Eli Melaas