BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 5, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Clear with a few cirrus
Temperature: 61F, Dew point: 51F, Wind: WSW at 15G19 kt
Sea-level pressure: 29.83 inches Hg, rising
Visibility: 65 miles
6-hour minimum temp: 54F
24-hour rainfall: 0
BHO SA 1155 CLR 65 100/61/51/2515G19/983/
FEW CI SE-S AND NW/ 8/001 51007 10061 20054
 
10 A.M.  
Weather: Scattered cumulus fractus
Temperature: 71F, Dew point: 53F, Wind: W at 17G26
Sea-level pressure: 29.81 inches Hg, falling
Visibility: 65 miles
BHO SA 1455 45 SCT 65 094/71/53/2617G26/981/
PK WND 2626/1448/ 8/100 56006
 
1 P.M.  
Weather: Scattered cumulus fractus
Temperature: 76F, Dew point: 53F, Wind: W at 15G20 kt
Sea-level pressure: 29.78 inches Hg, falling
Visibility: 65 miles
6-hourly max. temp. 76F
BHO SA 1755 45 SCT 65 085/76/53/2715G20/978/
8/100 58009 10076 20061
 
 
WEATHER SUMMARY FOR SATURDAY, JULY 4
 
TEMPERATURE (DEGREES F)
MAX.....77    NORMAL.....80
MIN.....59    NORMAL.....60
MEAN....68    NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL...........-2
TOTAL DEPARTURE FOR THE MONTH..........-24  [-6.2 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............0  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE MONTH.............9  DEPARTURE.......+5
TOTAL HEATING UNITS FOR THE SEASON............9  DEPARTURE.......+5
TOTAL HEATING UNITS LAST SEASON TO DATE.......0  DIFFERENCE......+9
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............43 W   AT 5:15 P.M.  
                   AEROVANE..............39 W   AT 5:15 P.M.   
                   ASOS..................40 WNW AT 5:16 P.M.   
                   DAVIS.................43 W   AT 5:15 P.M. 
FASTEST MILE FOR YESTERDAY...............31 W   AT 5:24 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............28 WNW AT 5:25 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE...........29 W   AT 5:25 P.M.    
AVERAGE WIND SPEED AND DIRECTION.......15.4 WSW
                   ASOS................15.3
                   DAVIS...............14.5 WSW [258 DEG]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE....-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR  JULY..............1.54  DEPARTURE....+1.04
                         ASOS..............1.56 
TOTAL PRECIPITATION FOR THE YEAR..........25.18  DEPARTURE....-0.99
                         ASOS.............26.21
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  62/57/60/-10/.../000/00    25 NNE   TSTM
7/2  66/56/61/-9/.../000/00     29 SSW   AERO 25 MPH SSW TSTM
7/3  75/58/67/-3/T/.../..       23 WSW
7/4  77/59/68/-2/0/.../..       43 W
 
NEW DAILY RECORDS FOR JULY 2009 TO DATE...
NONE
 
DAILY EXTREMES
 
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 44e N IN 1944
 
RECORDS FOR JULY 6
HIGH 98F IN 1911
LOW 47F IN 1979
PRECIP 1.43 INCHES IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999
 
TODAY'S REPORT PREPARED BY: Andrew Hoell