BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 19, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
CLEARING FOLLOWED BY WARMER AND MORE HUMID WEATHER
 
Considerable middle level cloudiness early today cleared away
at mid-morning followed warmer and more humid conditions. 
Dewpoints in the lower 50's yesterday rose to the lower 60's
by noon today along with temperature readings reaching the
lower 80's so today will average 6 to 8 degrees warmer than
normal considering a warm start at 62 degrees.  Our normal 
low is now 57 degrees. 
 
Today's observations:
 
7 A.M.   
Weather: Broken altocumulus clouds 
Temperature: 67F, Dew point: 54F, Wind: NE at 04 kts 
Sea-level pressure: 30.09 inches Hg, steady
Visibility: 20 miles, hazy, thin smoke along horizon    
6-hour min temp. 62F   
24-hour precip: 0.00
BHO SA 1155 E95 BKN 20 189/67/54/0404/009/ THN K LYR ALG HRZN 
HAZY/ 8/070 50001 10067 20062 
      
10 A.M. 
Weather: Clear, very hazy, few clouds N-E-S   
Temperature: 75F, Dew point: 56F, Wind: ESE at 07 kts
Wind: Direction variability E-SE 
Sea-level pressure: 30.09 inches Hg, steady
Visibility: 15 miles, hazy    
BHO SA 1455 CLR 15 190/75/56/1107/009/ AC N-E-S HAZY 
WND 08V14/ 8/040 50001
 
1 P.M. 
Weather: Clear, few small cumulus, hazy 
Temperature: 82F, Dew point: 60F, Wind: SSW at 10 kts
Sea-level pressure: 30.04 inches Hg, falling
Visibility: 20 miles   
6-hour max. temp. 83 deg.   
BHO SA 1755 CLR 20 173/82/60/2110/004/ 
FEW SML CU HAZY/ 8/100 58017 10083 20067 
 
WEATHER SUMMARY FOR MONDAY, JUNE 18 
 
TEMPERATURE (DEGREES F)
MAX.....79    NORMAL.....76 
MIN.....60    NORMAL.....57
MEAN....70    NORMAL.....66
DEPARTURE FROM 30-YEAR NORMAL............+4
TOTAL DEPARTURE FOR THE MONTH...........-12 (-0.9 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH...........70  DEPARTURE........+11  
TOTAL HEATING UNITS FOR THE SEASON........5901  DEPARTURE.......-454
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE......+111 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............23 NW  AT 12:38 A.M.   
                   AEROVANE.............22 NW  AT 12:38 A.M. 
                   ASOS.................N/A  #
                   DAVIS................22 NW  AT 12:38 A.M.      
FASTEST MILE FOR YESTERDAY..............14 NW  AT  1:31 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........17 NNW AT  2:10 A.M.        
AVERAGE WIND SPEED AND DIRECTION....... 8.2 W  
                   ASOS.................N/A  #
                   DAVIS............... 8.5 NW [310 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....0.00  DEPARTURE.....-0.13
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR THE MONTH..........1.97  DEPARTURE.....-0.41 
                         ASOS..............1.97    
TOTAL PRECIPITATION FOR THE YEAR..........26.13  DEPARTURE.....+2.01 
                         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   
6/17 85/58/72/+6/T/632/69           31 W   
6/18 79/60/70/+4/0/880/96           23 NW
 
6/19 morning low temp. 62 deg.; normal now 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 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940
 
RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967
 
TODAY'S REPORT PREPARED By: Robert Skilling