BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 13, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LOW OVERCAST WITH PERIODS OF LIGHT DRIZZLE 
AND VERY, VERY COOL TEMPERATURES TODAY ALONG
WITH GUSTY NORTHEAST WINDS UP TO 25 TO 30 MPH
 
Temperatures are holding steady in the lower 
50's right into early this afternoon under low 
stratus clouds and gusty northeast winds up to 
25 to 29 MPH. Today's high temperature remains 
at 56 degrees at midnight at the start of the 
day with hourly readings of 51 to 52 degrees 
since 8 a.m. EDT. We are not close to
the record low maximum for this date which is 
51 degrees recorded in 1890.   
 
Today's observations:
 
7 A.M.   
Weather: Low overcast, stratus  
Temperature: 52F, Dew point: 51F, Wind: NE at 11G20 kts 
Sea-level pressure: 30.11 inches Hg, rising 
Visibility: 10 miles, E 8 miles, SW 15 miles, thin fog     
6-hour min temp. 52F   
24-hour precip: 0.05 in. 
BHO SA 1155 E8 OVC 10 198/52/51/0411G20/011/
THN F VSBY E 8 SW 15 WND 36V07/ 8/6// 51010 
MANUAL 6001/ ASOS 60001 MANUAL 70005 
ASOS 70004 10055 20052  
   
10 A.M. 
Weather: Low overcast, stratus 
Temperature: 52F, Dew point: 51F, Wind: NE at 12G20 kts 
Wind: Variability N-ENE  
Sea-level pressure: 30.14 inches Hg, rising
Visibility:  25 miles, NE 30 miles, SE-S 15 miles  
3-hourly rainfall: trace
BHO SA 1455 E8 OVC 25 205/52/51/0412G20/014/ 
CIG RGD BRGHT SPTS IOVC VSBY NE 30 SE-S 15 
WND 01V07/ 8/6// 53007 MANUAL 6000/ 
   
1 P.M. 
Weather: Low overcast, nimbostratus  
Temperature: 52F, Dew point: 48F, Wind: NNE at 13G22 kts 
Wind: Variability N-ENE 
Sea-level pressure: 30.16 inches Hg, steady
Visibility: 6 miles in light drizzle, N 10 miles, NE 15 miles    
6-hour max. temp. 53 deg. 
6-hour precip: trace   
BHO SA 1755 E10V BKN 18 OVC 6L- 213/52/48/0313G22/016/
CIG RGD 10 BKN V OVC VSBY N 10 NE 15 SE 4 PCPN INTMT 
VRY LGT WND 35V06/ 8/6// 50008 MANUAL 6000/ 10053 20051
 
WEATHER SUMMARY FOR TUESDAY, JUNE 12 
 
TEMPERATURE (DEGREES F)
MAX.....70    NORMAL.....75 
MIN.....56    NORMAL.....55
MEAN....63    NORMAL.....65
DEPARTURE FROM 30-YEAR NORMAL...........-2
TOTAL DEPARTURE FOR THE MONTH...........+8 (+0.5 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............2  DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE MONTH...........40  DEPARTURE.........-5  
TOTAL HEATING UNITS FOR THE SEASON........5871  DEPARTURE.......-471
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE.......+81 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29 NNE AT  9:57 A.M.   
                   AEROVANE.............26 NNE AT 11:44 A.M.     
                   ASOS.................N/A  #
                   DAVIS................29  NE AT  3:05 P.M.     
FASTEST MILE FOR YESTERDAY..............20 NNE AT  9:38 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 NNE AT  9:38 A.M.     
AVERAGE WIND SPEED AND DIRECTION.......11.5 NE
                   ASOS.................N/A  #
                   DAVIS...............11.2 NNE [020 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... 0.05  DEPARTURE.....-0.08
                         ASOS..............0.04  
TOTAL PRECIPITATION FOR THE MONTH..........1.97  DEPARTURE.....+0.41 
                         ASOS..............1.97    
TOTAL PRECIPITATION FOR THE YEAR..........26.13  DEPARTURE.....+2.83
                         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 morning low temp. 52 deg; normal now 55 deg. 
     rainfall midnight to 7 a.m. 0.01 inch
 
      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 13
HIGH 93F IN 1988
LOW 43F IN 1982
PRECIP 6.07 INS 1998 [Record for month]
PEAK GUST 69 MPH N IN 1956
 
RECORDS FOR JUNE 14
HIGH 93F IN 1956
LOW 41F IN 1912
PRECIP 1.49 INS 1896
PEAK GUST 55 MPH WNW IN 1958
 
TODAY'S REPORT PREPARED By: Robert Skilling/Eli Melaas