BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 18, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUNSHINE WITH INCREASING HIGH CLOUDINESS TODAY
TEMPERATURES AVERAGING WARMER THAN NORMAL
 
Completely sunny skies this morning gave way to 
increasing amounts of middle and high cloudiness
by this afternoon.  Temperatures will again average
warmer than normal for the 3rd day in a row but 
the cool weather of last week has cooled the monthly
average to slightly below normal.  Less than one 
quarter inch of rain has fallen since June 4th.
 
Today's observations:
 
7 A.M.   
Weather: Clear, few cirrus distant S-NW 
Temperature: 65F, Dew point: 51F, Wind: N at 11G18 kts 
Sea-level pressure: 30.01 inches Hg, rising
Visibility: 55 miles   
6-hour min temp. 60F   
24-hour precip: trace
BHO SA 1155 CLR 55 163/65/51/0111G18/001/
FEW CI DSNT S-NW WND 34V06 WND GRDLY VEERING/ 
8/001 51019 10069 20060 
     
10 A.M. 
Weather: Thin scattered cirrus, cirrocumulus  
Temperature: 71F, Dew point: 47F, Wind: ENE at 09 kts
Wind: Direction variability NNE-E 
Sea-level pressure: 30.06 inches Hg, rising
Visibility: 60 miles, 70 miles NW   
BHO SA 1455 300 –SCT 60 179/71/47/0609/006/ 
FEW SML CU DSNT SSW-SW AC/FEW ACSL DSNT NW-NNE 
FEW CC LWR CI NNW-NE VSBY NW 70 WND 02V09/
8/141 51016
 
1 P.M. 
Weather: High partly thin overcast, halo  
Temperature: 76F, Dew point: 51F, Wind: W at 08 kts
Wind: Direction variability WSW-WNW
Sea-level pressure: 30.03 inches Hg, falling
Visibility: 60 miles, 70 miles NW   
6-hour max. temp. 77 deg. 
BHO SA 1755 220 SCT E250 OVC 50 169/76/51/2608/003/
FEW AC NE-E DENSE CI ALQDS OVC PTLY THN HALO K LYR 
ALF N-SE WND 24V30/ 8/042 58010 10077 20065
 
WEATHER SUMMARY FOR SUNDAY, JUNE 17 
 
TEMPERATURE (DEGREES F)
MAX.....85    NORMAL.....76 
MIN.....58    NORMAL.....56
MEAN....72    NORMAL.....66
DEPARTURE FROM 30-YEAR NORMAL............+6
TOTAL DEPARTURE FOR THE MONTH...........-16 (-1.1 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH...........70  DEPARTURE........+13  
TOTAL HEATING UNITS FOR THE SEASON........5901  DEPARTURE.......-452
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE......+111 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............31 W   AT 2:09 P.M.  
                   AEROVANE.............30 W   AT 2:09 P.M.      
                   ASOS.................N/A  #
                   DAVIS................33 WSW AT 2:09 P.M.     
FASTEST MILE FOR YESTERDAY..............23 W   AT 2:42 P.M. *    
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 W   AT 2:10 P.M.       
AVERAGE WIND SPEED AND DIRECTION....... 10.5 W
                   ASOS.................N/A  #
                   DAVIS................11.2 WSW [240 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....trace DEPARTURE.....-0.14
                         ASOS..............0.00  
TOTAL PRECIPITATION FOR THE MONTH..........1.97  DEPARTURE.....-0.28 
                         ASOS..............1.97    
TOTAL PRECIPITATION FOR THE YEAR..........26.13  DEPARTURE.....+2.14 
                         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 morning low temp. 60 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 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INCHES 1998
PEAK GUST 48e MPH W IN 1943
 
RECORDS FOR JUNE 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940
 
TODAY'S REPORT PREPARED By: Robert Skilling