BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 12, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
PARTLY SUNNY AND COOLER TODAY
CORRECTION NOTED IN MAY 2007 DATA
 
The sky has been broken to overcast today with mostly middle 
level cloudiness and intermittent sunshine has allowed the 
temperature to reach the 70-degree mark.  A brief light 
rain shower occurred just before noon and a moderate shower
left 0.05 inch very early this morning.  In addition, a 
shower last evening brought 0.04 inch for a total of 0.09 in.
during the past 24 hours.
 
An error occurred in our May 2007 data in the total number of
heating degree day units for the season through May. The reported value
was 5861 and is now corrected to read 5831.  The departure for 
the season is correct at -466. 
  
Today's observations:
 
7 A.M.   
Weather: Broken stratocumulus and altocumulus
Temperature: 62F, Dew point: 59F, Wind: NNE at 08 kts 
Sea-level pressure: 30.01 inches Hg, rising 
Visibility: 20 miles, thin fog     
6-hour min temp. 60F   
24-hour precip: 0.09 in. 
BHO SA 1155 E15 BKN 110 BKN 20 161/62/59/0308/001/ 
15 BKN V SCT WND 36V06/ 8/530 51016 ASOS 70009
MANUAL 70009 10063 20060  
     
10 A.M. 
Weather: Overcast stratocumulus with lower cumulus 
Temperature: 67F, Dew point: 57F, Wind: NE at 14G23 kts 
Wind: Variability N-ENE  
Sea-level pressure: 30.02 inches Hg, rising
Visibility:  35 miles 
BHO SA 1455 E35 OVC 35 166/67/57/0414G23/002/ 
LWR CU/SC SSE-SW-N MDT CU SW-NW SML BINOVC W 
VSBY WNW 45 WND 36V07/ 8/8// 51005 
   
1 P.M. 
Weather:  Broken clouds, altocumulus 
Temperature: 69F, Dew point: 56F, Wind: NE at 10G20 kts 
Wind: Variability N-E 
Sea-level pressure: 30.03 inches Hg, rising
Visibility: 35 miles  
6-hour max. temp. 70 deg.  
BHO SA 1755 60 SCT 80 SCT 100 SCT E150 BKN 35 171/69/56/0410G20/003/ 
CU/FEW MDT CU SW-NW AC CHAOTIC/ACC/ACSL ALQDS WND 01V09/ 8/890 51005 
MANUAL 6000/ 10070 20062
 
WEATHER SUMMARY FOR MONDAY, JUNE 11 
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....74 
MIN.....62    NORMAL.....55
MEAN....70    NORMAL.....65
DEPARTURE FROM 30-YEAR NORMAL...........+5
TOTAL DEPARTURE FOR THE MONTH...........+10 (+0.7 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-3
TOTAL HEATING UNITS FOR THE MONTH...........38  DEPARTURE.........-4  
TOTAL HEATING UNITS FOR THE SEASON........5869  DEPARTURE.......-470
TOTAL HEATING UNITS LAST SEASON TO DATE...5790  DIFFERENCE.......+79 
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29 NE AT 2:14 P.M.  
                   AEROVANE.............26 NE AT 2:14 P.M.    
                   ASOS.................N/A  #
                   DAVIS................27 NE AT 2:17 P.M.     
FASTEST MILE FOR YESTERDAY..............19 NE AT 2:14 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 NE AT 2:14 P.M.    
AVERAGE WIND SPEED AND DIRECTION....... 9.9 NE
                   ASOS.................N/A  #
                   DAVIS................9.4 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... 0.09  DEPARTURE.....-0.04
                         ASOS..............0.08  
TOTAL PRECIPITATION FOR THE MONTH..........1.92  DEPARTURE.....+0.49 
                         ASOS..............1.91    
TOTAL PRECIPITATION FOR THE YEAR..........26.08  DEPARTURE.....+2.91
                         ASOS.............25.57   
 
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/.../..           35 W   
6/7  69/44/57/-7/0/.../..           23 W
6/8  78/58/68/+4/0/.../..           20 WSW
6/9  63/54/59/-5/0.02/000/00        18 ENE
6/10 70/50/60/-4/0/.../..           22 ENE 
6/11 77/62/70/+5/0.04/.../..        29 NE   
 
6/12 morning low temp. 60 deg; normal now 55 deg.
     rainfall midnight to 7 a.m. 0.05 in.
 
      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 12
HIGH 92F IN 1973
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991
 
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
 
TODAY'S REPORT PREPARED By: Robert Skilling/Eli Melaas