BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 17, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 

Today's observations:
 
7 A.M.   
Weather: Thin scattered cirrus
Temperature: 66F, Dew point: 59F, Wind: WSW at 10 kt 
Sea-level pressure: 29.88 inches Hg, steady
Visibility: 15 miles   
6-hour min temp. 58F   
24-hour precip: 0.00
BHO SA 1155 250 –SCT 15 120/66/59/2410/988/ 
K LYR ALNG HRZN SW-NW HAZY/ 8/001 50001 10066 20058 
    
10 A.M. 
Weather: Broken cirrus
Temperature: 78F, Dew point: 61F, Wind: SSW at 10 kt 
Sea-level pressure: 29.87 inches Hg, falling
Visibility: 30 miles  
BHO SA 1455 200 BKN 30 115/78/61/2110/987/ HAZY/ 8/001 58005
 

WEATHER SUMMARY FOR SATURDAY, JUNE 16 
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....76 
MIN.....55    NORMAL.....56
MEAN....68    NORMAL.....66
DEPARTURE FROM 30-YEAR NORMAL............+2
TOTAL DEPARTURE FOR THE MONTH...........-22 (-1.2 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH...........70  DEPARTURE........+15  
TOTAL HEATING UNITS FOR THE SEASON........5901  DEPARTURE.......-450
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE......+111 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............25 SW  AT 9:32 P.M.  
                   AEROVANE.............24 SW  AT 9:32 P.M.      
                   ASOS.................N/A  #
                   DAVIS................27 WSW AT 9:31 P.M.     
FASTEST MILE FOR YESTERDAY..............17 S   AT 4:40 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........18 SW  AT 9:33 P.M.      
AVERAGE WIND SPEED AND DIRECTION.......7.6 SW 
                   ASOS.................N/A  #
                   DAVIS...............7.2 SSW [212 deg]   
* Last of several occurrences. 
# 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....0.00  DEPARTURE.....-0.14
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR THE MONTH..........1.97  DEPARTURE.....-0.14 
                         ASOS..............1.97    
TOTAL PRECIPITATION FOR THE YEAR..........26.13  DEPARTURE.....+2.28 
                         ASOS.............25.61   
 
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/.../..           21 NNE
6/16 80/55/68/+2/0/.../..           25 SW  
 
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 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INCHES 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977
 
RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INCHES 1998
PEAK GUST 48e MPH W IN 1943
 
TODAY'S REPORT PREPARED By: Andrew Hoell