BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 4, 2010 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
DENSE FOG FOR A 4TH CONSECUTIVE MORNING
BACK DOOR COLD FRONT BRINGS SHARP TEMPERATURE DROP
 
The summit up here was fogged in again today
for a fourth straight morning.  A layer of
stratus clouds moved in with a wind shift
to northeast in the hour between midnight
and 1 AM EDT this morning. A temperature
drop of 7 degrees from 67 to 60 was recorded.
Today is still another unseasonably warm day,
which will run at least 8 degrees warmer than
normal just like the first three days of the month.
 
Today's observations:
 
7 A.M.
Weather: Obscurement with heavy fog 
Temperature: 61F, Dew point: 61F, Wind: ESE at 3 kts,
Wind: Light
Sea-level pressure: 29.82 inches Hg, rising
Visibility: 1/16 mile in dense fog
6-hour minimum temp: 59F 
24-hour rainfall: trace
BHO SA 1155 W2 X 1/16F 099/61/61/1103/982/
SUN DISC OCNL VSB/ 8//// 51017 10061 20059
 
10 A.M. 
Weather: Scattered altocumulus, scattered dense cirrus,
thin scattered cirrus, cumulus, few moderate forming
along a line distant SSW-N
Temperature: 73F, Dew point: 63F, Wind: S at 2 kts,
Wind: Light and estimated
Sea-level pressure: 29.84 inches Hg, falling
Visibility: 35 miles, N-NE 15, WNW 45 miles,
smoke N-NE, light haze
BHO SA 1455 65 SCT 80 SCT 220 SCT 250 –SCT 35 105/73/63/E1902/984/
K LYR N-NE LINE OF CU/FEW MDT FRMG DSNT SSW-N FEW ACSL DNS CI N
VSBY N-NE 15 WNW 45 LGT DSNT HZ/ 8/242 50006 
 
1 P.M.  
Weather: Scattered moderate cumulus, broken altocumulus originating
from cumulus, broken cirrus and light haze  
Temperature: 81F, Dew point: 63F, Wind: SW at 4 kts,
Wind: Light
Sea-level pressure: 29.82 inches Hg, falling
Visibility: 35 miles, N 30, NE-E 25, WNW 45, light haze
6-hour max. temp: 82F 
BHO SA 1755 50 BKN E70 BKN 250 BKN 35 099/81/63/2304/982/
MDT CU ALQDS VSBY N 30 NE-E 25 WNW 45 LGT HZ WND LGT/
8/261 58006 10082 20061
 
WEATHER SUMMARY FOR THURSDAY, JUNE 3
 
TEMPERATURE (DEGREES F)
MAX.....80     NORMAL.....72
MIN.....59     NORMAL.....53
MEAN....70     NORMAL.....62
 
DEPARTURE FROM 30-YEAR AVERAGE................+8
TOTAL DEPARTURE FOR THE MONTH................+24 [+7.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............0   DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH...........159   DEPARTURE.......-14
TOTAL HEATING UNITS FOR THE SEASON.........5641   DEPARTURE......-670
TOTAL HEATING UNITS LAST SEASON TO DATE....6134   DIFFERENCE.....-493
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............28 S    AT   2:06 P.M. *  
                   AEROVANE..............30 S    AT   2:06 P.M. * 
                   ASOS..................30 S    AT   2:06 P.M.   
                   DAVIS.................31 S    AT  12:33 P.M.     
THE FASTEST MILE FOR YESTERDAY...........23 S    AT   2:06 P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE............24 S    AT   2:06 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE...........25 S    AT   2:06 P.M.   
AVERAGE WIND SPEED AND DIRECTION........12.7 S 
                   ASOS.................12.0
                   DAVIS................11.4 S [180 DEG]
* last of several occurrences....
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.86  DEPARTURE......+0.47
                         ASOS..............0.85
TOTAL PRECIPITATION FOR THE YEAR..........34.27  DEPARTURE.....+12.14
                         ASOS.............34.33
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2010 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
 
6/1  82/57/70/+8/0.86/0/.../..  33 WNW AERO 38 MPH WNW TSTM
6/2  80/59/70/+8/0.00/.../..    22 S
6/3  80/59/70/+8/T/.../..       28 S   AERO 31 MPH S
 
6/4  our morning low temp: 59F; the normal low is now 53F 
 
NEW DAILY RECORDS FOR JUNE 2010
None to date
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 4
HIGH 99F IN 1919 [Record for month]
LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007
PEAK GUST 48 MPH SSE IN 1983
 
RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988
 
TODAY'S REPORT PREPARED BY: Robert Skilling