BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 12, 2009
ALL DATA IN EASTERN STANDARD TIME
Today's observations:
7 A.M.
Weather: Overcast cirrostratus, few stratocumulus NE-SE
Temperature: 43F, Dew point: 36F, Wind: NNE at 10 kts,
Wind: Direction variable N to ENE
Sea-level pressure: 30.36 inches Hg, rising
Visibility: 25 miles, light haze
6-hour minimum temp: 41F
24-hour precip: 0.00
BHO SA 1155 E20 OVC 25 281/43/36/0210/036/
FEW SC NE-SE LGT HZ WND 35V06/ 8/507 53005 10044 20041
10 A.M.
Weather: Broken stratocumulus, overcast cirrostratus
Temperature: 47F, Dew point: 37F, Wind: NE at 11G25 kts,
Wind: Peak gust 27 kts NE at 9:40 A.M.
Wind: Direction variable from N to E
Sea-level pressure: 30.36 inches Hg, rising
Visibility: 45 miles, light haze
BHO SA 1455 E23 BKN 200 OVC 45 282/47/37/05112G25/036/
LGT HZ PK WND 0427/40 WND 36V09/ 8/507 50001
1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 47F, Dew point: 38F, Wind: NE at 11G25 kts,
Wind: Peak gust 28 kts NNE at 12:23 P.M.
Wind: Direction variable N to E
Sea-level pressure: 30.30 inches Hg, falling
Visibility: 70 miles
6-hourly max. temp: 49F
BHO SA 1755 E20 BKN 120 OVC 70 262/47/38/0411G25/030/
PK WND 0328/23 WND 35V09/ 8/57/ 56020 10049 20043
WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 11
TEMPERATURE (DEGREES F)
MAX.....50 NORMAL.....51
MIN.....43 NORMAL.....36
MEAN....47 NORMAL.....43
DEPARTURE FROM 30-YEAR AVERAGE............+4
TOTAL DEPARTURE FOR THE MONTH............+26 [+2.2 DEGREES/DAY]
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............18 DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH...........194 DEPARTURE.......-27
TOTAL HEATING UNITS FOR THE SEASON..........815 DEPARTURE........+3
TOTAL HEATING UNITS LAST SEASON TO DATE.....720 DIFFERENCE......+95
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............31 NNE AT 10:04 A.M.
AEROVANE..............30 NNE AT 10:04 A.M.
ASOS..................31 NE AT 10:05 A.M.
DAVIS.................27 N AT 9:55 A.M.
FASTEST MILE FOR YESTERDAY...............20 NNE AT 10:06 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............20 NE AT 11:33 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 N AT 9:56 A.M.
AVERAGE WIND SPEED AND DIRECTION.......12.0 NNE
ASOS................12.3
DAVIS...............11.7 NNE [024 DEG]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.16
ASOS..............0.00
TOTAL PRECIPITATION FOR MONTH ............0.06 DEPARTURE....-1.62
ASOS..............0.04
TOTAL PRECIPITATION FOR THE YEAR..........45.17 DEPARTURE....+1.47
ASOS.............46.35
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.8
TOTAL SNOWFALL FOR THE SEASON...............3.0 DEPARTURE.....+2.0
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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
11/1 58/44/51/+4/0.05/167/27 22 WNW
11/2 49/42/46/0/T/099/16 29 NE
11/3 57/36/47/+1/0/474/77 32 W AERO 32 MPH W
11/4 49/34/42/-4/0/514/84 24 W
11/5 46/36/41/-4/0.01/006/01 21 N
11/6 47/31/39/-6/0/419/69 38 WNW AERO 38 MPH WNW
11/7 49/29/39/-6/0/575/95 33 S
11/8 66/42/54/+10/0/549/91 31 SSW
11/9 68/49/59/+15/0/486/81 35 S AERO 35 MPH S
11/10 62/50/56/+12/0/000/00 23 SW
11/11 50/43/47/+4/0/113/19 31 NNE
11/12 our morning low temp: 41F; the normal low is now 35F
NEW DAILY RECORD FOR NOVEMBER 2009
None
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947
RECORDS FOR NOVEMBER 13
HIGH 66 IN 1931, 1964
LOW 14 IN 1920
PRECIP 1.96 IN 1982
SNOWFALL 4.6 IN 2004
PEAK GUST 77 S IN 1982
TODAY'S REPORT PREPARED BY: Stephanie Radner