BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 6, 2010 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
IMPRESSIVE WIND SHIFT AND WARM FRONTAL PASSAGE
THIS AFTERNOON.....
 
In spite of the severe weather threat and a tornado
watch issued Saturday afternoon, conditions remained
relatively dry throughout the evening and into Sunday 
morning. Intermittent, light rain showers brought only
0.02 inch of precipitation to the summit while heavier
showers moved north.
 
Around 11:45 A.M. EDT an impressive wind shift from
east-southeast to south occurred followed by a warm
frontal passage. As a result, temperatures raced to
80F by 2 P.M. EDT while a peak wind gust of 43 MPH
was recorded at 2:16 P.M. EDT from the south-southeast.
 
The National Weather Service has again issued a tornado
watch for this evening for all of eastern Massachusetts.
 
 
Today's observations:
 
7 A.M.
Weather: Broken stratocumulus, broken altocumulus,
overcast cirrus
Temperature: 69F, Dew point: 65F, Wind: SW at 4 kts
Sea-level pressure: 29.60 inches Hg, falling
Visibility: 20 miles, lower in northwest through east
Wind: Light and variable
6-hour minimum temp: 68F 
24-hour rainfall: Trace
BHO SA 1155 E50 BKN E70 BKN 250 OVC 20 023/69/65/2204/960/
VSBY LWR NW-E WND LGT AND VRB/ 8/577 58000 MANUAL 6000/
10069 20068
 
10 A.M. 
Weather: Few stratus fractus, scattered stratocumulus,
overcast cirrus, very light rainfall
Temperature: 71F, Dew point: 69F, Wind: ESE at 9 kts
Sea-level pressure: 29.51 inches Hg, falling rapidly
Visibility: 8 miles, thin fog
3-hour rainfall: 0.02 inch
BHO SA 1455 E60 BKN 250 OVC 8 993/71/69/1109/951/
FEW STRFRA SUN DMLY VSBL PCPN VRY LGT THN FOG 8/571 58030
MANUAL 6002/
 
1 P.M.  
Weather: Scattered altostratus, broken altocumulus
lenticularis, overcast dense cirrus, sun dimly visible,
hazy, pressure falling rapidly last hour
Temperature: 79F, Dew point: 70F, Wind: S at 10 kts
Sea-level pressure: 29.36 inches Hg, falling rapidly
Visibility: 10 miles, hazy
Wind: Peak wind gust 32 kts from south at 12:07 P.M. EST
6-hour rainfall: 0.02 inch
6-hour max. temp: 80F 
BHO SA 1755 130 SCT E200 BKN 250 OVC 10 943/79/70/1816G31/936/
DNS CI SUN DMLY VSBL HAZY PRESFR PK WND 1932/07 8/042 58050
ASOS 6003/ MANUAL 6002/ 10080 20068
 
 
WEATHER SUMMARY FOR SATURDAY, JUNE 5
 
TEMPERATURE (DEGREES F)
MAX.....83     NORMAL.....73
MIN.....63     NORMAL.....53
MEAN....73     NORMAL.....63
 
DEPARTURE FROM 30-YEAR AVERAGE...............+10
TOTAL DEPARTURE FOR THE MONTH................+43 [+8.4 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............0   DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH.............0   DEPARTURE.......-22
TOTAL HEATING UNITS FOR THE SEASON.........5641   DEPARTURE......-678
TOTAL HEATING UNITS LAST SEASON TO DATE....6143   DIFFERENCE.....-502
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............32 W AT  3:24 A.M.
                   AEROVANE..............36 W AT  3:24 A.M.
                   ASOS..................33 W AT  3:24 A.M.
                   DAVIS.................34 W AT  3:24 A.M.
THE FASTEST MILE FOR YESTERDAY...........24 W AT  3:21 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............24 W AT  3:25 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........27 W AT  3:24 P.M.
AVERAGE WIND SPEED AND DIRECTION........12.6 S 
                   ASOS.................12.2
                   DAVIS................11.6 S [191 DEG]
 
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..........1.02  DEPARTURE......+0.37
                         ASOS..............1.02
TOTAL PRECIPITATION FOR THE YEAR..........34.43  DEPARTURE.....+12.04
                         ASOS.............34.50
 
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  84/59/72/+9/0/.../..       23 SSW
6/5  83/63/73/+10/0.16/.../..   32 W   AERO 36 MPH W TSTM
 
6/6  morning low temp: 68F; 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 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1920, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000
 
RECORDS FOR JUNE 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982
 
TODAY'S REPORT PREPARED BY: Eli Melaas