BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 26, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
90-DEGREE HEAT ARRIVES THIS AFTERNOON
MODERATE HUMIDITY WITH DEWPOINTS IN THE 60'S
UNLIMITED SUNSHINE WITH ONLY SOME HIGH THIN CLOUDS
 
The last time the thermometer touched 90 degrees here at 
the Observatory was on August 3, last year, when the high 
was 91 degrees. That day was the third day of the only heat
wave to occur in 2006. 

Below we've included a listing of the hottest temperatures
for both June 26 and 27. 
 
RECORD TEMPERATURES... 
 
June 26th..
1. 96 in 1952
2. 95 in 2005
3. 92 in 1963
4. 91 in 1953,2002
5. 90 in 1999 [latest of several]
 
June 27th..
1. 93 in 1999
2. 92 in 1941,1963,1966
3. 91 in 2003 [latest of several]
4. 90 in 1946, 1900
5. 89 in 2005 [latest of several] 
 
Also for June 27th, the record highest minimum temperature 
was 71 degrees in 2003. 
 
Today's observations:
 
7 A.M.   
Weather: Thin scattered cirrus/thin fog and haze 
Temperature: 70F, Dew point: 65F, Wind: SW at 10 kts 
Sea-level pressure: 30.21 inches Hg, steady
Visibility: 4 miles, thin fog and haze  
6-hour min temp. 63F   
24-hour precip: 0.00 in. 
BHO SA 1155 300 –SCT 4FH 230/70/65/2210/021/ VSBY INCR THN F 
DSPTNG/ 8/001 51006 10070 20063 
          
10 A.M. 
Weather:  Thin scattered cirrus, hazy 
Temperature: 83F, Dew point: 67F, Wind: SW at 11 kts
Wind: Variability S-WSW  
Sea-level pressure: 30.20 inches Hg, falling 
Visibility: 10 miles, hazy       
BHO SA 1455 250 –SCT 300 –SCT 10 228/83/67/2311/020/ HAZY/ 
8/001 58006
 
1 P.M. 
Weather: Thin scattered cirrus clouds 
Temperature: 90F, Dew point: 65F, Wind: SW at 13G19 kts
Wind: variability S-W
Sea-level pressure: 30.17 inches Hg, falling 
Visibility: 20 miles, hazy    
6-hour max. temp: 91 deg.
BHO SA 1755 300 –SCT 20 216/90/65/2313G19/017/ FEW LWR CI HAZY 
WND 19V26/ 8/001 58011 10091 20070
 

WEATHER SUMMARY FOR MONDAY, JUNE 25
 
TEMPERATURE (DEGREES F)
MAX.....86    NORMAL.....78 
MIN.....64    NORMAL.....58
MEAN....75    NORMAL.....68
DEPARTURE FROM 30-YEAR NORMAL.............+7
TOTAL DEPARTURE FOR THE MONTH............-16 (-0.8 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE MONTH...........80  DEPARTURE........+11   
TOTAL HEATING UNITS FOR THE SEASON........5911  DEPARTURE.......-455
TOTAL HEATING UNITS LAST SEASON TO DATE...5791  DIFFERENCE......+120
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............31 SSW AT 1:17 P.M.     
                   AEROVANE.............29 SSW AT 1:13 P.M.   
                   ASOS.................N/A  #
                   DAVIS................28 W   AT 1:38 P.M.       
FASTEST MILE FOR YESTERDAY..............24 SSW AT 1:17 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 SSW AT 4:28 P.M.          
AVERAGE WIND SPEED AND DIRECTION........13.2 SSW     
                   ASOS.................N/A  #
                   DAVIS................13.5 SSW [210 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..........2.64  DEPARTURE.....-0.65 
                         ASOS..............2.60    
TOTAL PRECIPITATION FOR THE YEAR..........26.80  DEPARTURE.....+1.77 
                         ASOS.............26.24   
 
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 74/60/67/0/0.38/147/16         25 W
6/21 77/56/67/0/0.23/823/90         30 WSW  TSTM evening  
6/22 71/54/63/-4/0.06/560/61        37 NW   TSTM 1:15-1:30 P.M.
6/23 68/50/59/-9/0/816/89           33 W       
6/24 76/52/64/-4/0/807/88           28 W      
6/25 86/64/75/+7/0/752/82           31 SSW
 
6/26 morning low temp. 63 deg; normal now 59 deg. 
 
NEW DAILY RECORDS FOR JUNE 2007: 
 
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 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998
 
RECORDS FOR JUNE 27
HIGH 93F IN 1999
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945
 
TODAY'S REPORT PREPARED By: Robert Skilling/Eli Melaas