BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 11, 2009 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Scattered altocumulus stratiformis,
thin scattered cirrus fibratus
Temperature: 41F, Dew point: 36F, Wind: SW at 10G14 kt
Sea-level pressure: 30.14 inches Hg, rising
Visibility: 55 miles
6-hour minimum temp: 39F
BHO SA 1155 150 SCT 250 –SCT 55 206/41/36/2210G14/014/
8/071 53003 10042 20039
 
10 A.M.
Weather: Scattered cirrus
Temperature: 55F, Dew point: 38F, Wind: WSW at 15G22 kt
Sea-level pressure: 30.14 inches Hg, steady
Visibility: 65 miles
BHO SA 1455 200 SCT 250 –SCT 65 207/55/38/2415G22/014/ 8/001 50001
 
1 P.M.   
Weather: Broken cumulus mediocris
Temperature: 60F, Dew point: 39F, Wind: WSW at 15G26 kt
Sea-level pressure: 30.09 inches Hg, falling
Visibility: 65 miles
6-hour maximum temp: 60F
BHO SA 1755 45 BKN 65 190/60/39/2415G26/009/
PK WND 2426/1746/ 8/200 58017 10060 20041
 
 
WEATHER SUMMARY FOR SATURDAY, OCTOBER 10
 
TEMPERATURE (DEGREES F)
MAX.....62    NORMAL.....62
MIN.....42    NORMAL.....45
MEAN....52    NORMAL.....54
 
DEPARTURE FROM 30-YEAR AVERAGE...........-2
TOTAL DEPARTURE FOR THE MONTH............-3 [-0.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............13  DEPARTURE.......+1
TOTAL HEATING UNITS FOR THE MONTH...........101  DEPARTURE.......-1
TOTAL HEATING UNITS FOR THE SEASON..........258  DEPARTURE......-13
TOTAL HEATING UNITS LAST SEASON TO DATE.....214  DIFFERENCE.....+44
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............37 NW  AT  3:21 P.M. *
                   AEROVANE..............39 WNW AT  2:16 P.M.
                   ASOS..................36 NW  AT  2:32 P.M.
                   DAVIS.................39 WNW AT  2:16 P.M.
FASTEST MILE FOR YESTERDAY...............30 WNW AT  2:24 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............25 NW  AT  2:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........28 WNW AT  2:24 P.M.
AVERAGE WIND SPEED AND DIRECTION.......11.7 WNW
                   ASOS................11.1
                   DAVIS...............11.8 W [280 DEG]
*LAST OF SEVERAL OCCURRENCES
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR MONTH..............2.11   DEPARTURE....+0.71
                         ASOS..............2.14
TOTAL PRECIPITATION FOR THE YEAR..........39.99   DEPARTURE....+0.99
                         ASOS.............41.20
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1  56/39/48/-9/0/155/22     27 WSW 
10/2  60/40/50/-6/0/442/63     23 SSE 
10/3  63/51/57/+1/1.10/000/00  32 ESE  AERO 30 MPH ESE 
10/4  67/57/62/+6/0/202/29     21 WSW
10/5  64/49/57/+2/0/595/86     33 W    AERO 31 MPH W
10/6  65/45/55/0/0/628/91      25 W
10/7  67/51/59/+4/0.70/344/50  54 W    AERO 54 MPH W
10/8  61/48/55/+1/0/602/88     43 W    AERO 39 MPH W
10/9  60/48/54/0/.../000/00    29 SSE
10/10 62/42/52/-2/0/.../..     37 NW
 
NEW DAILY RECORDS FOR OCTOBER 2009
10/7: NEW RECORD WIND GUST 54 MPH W AT 2005E;
      surpasses previous record of 52 MPH ESE in 1972
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 11
HIGH 80 IN 1919,1949
LOW 28 IN 1993
PRECIP 0.96 INCHES IN 1903
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941
 
RECORDS FOR OCTOBER 12
HIGH 87 IN 1954
LOW 31 IN 1906
PRECIP 1.53 INCHES IN 1948
SNOWFALL TRACE IN 1941
PEAK GUST 55 MPH NW IN 1963
 
TODAY'S REPORT PREPARED BY: Andrew Hoell