BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 29, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Clear with a few cirrus and altocumulus
Temperature: 37F, Dew point: 31F, Wind: WSW at 14G18 kt
Sea-level pressure: 29.84 inches Hg, rising
Visibility: 50 miles
6-hour minimum temp: 37F
24-hour precipitation: Trace
BHO SA 1155 CLR 50 104/37/31/2414G18/984/
FEW AC E-S FEW CI NE-W/ 8/054 53016 70000 10039 20037 
 
10 A.M.
Weather: Clear with a few cirrus
Temperature: 45F, Dew point: 31F, Wind: WSW at 12G16 kt
Sea-level pressure: 29.88 inches Hg, rising
Visibility: 50 miles
BHO SA 1455 CLR 50 117/45/31/2412G16/988/
FEW CI ALQDS/ 8/003 51013
 
1 P.M.
Weather: Scattered cirrus
Temperature: 51F, Dew point: 30F, Wind: SSW at 11G16 kt
Sea-level pressure: 29.83 inches Hg, falling
Visibility: 50 miles
6-hour maximum temp: 51F
BHO SA 1755 200 SCT 55 103/51/30/2111G16/983/
8/003 55014 10051 20037
 
 
WEATHER SUMMARY FOR SATURDAY, NOVEMBER 28
 
TEMPERATURE (DEGREES F)
MAX.....49     NORMAL.....45
MIN.....38     NORMAL.....30
MEAN....44     NORMAL.....37
 
DEPARTURE FROM 30-YEAR AVERAGE.............+7
TOTAL DEPARTURE FOR THE MONTH............+141 [+4.8 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............21    DEPARTURE........-7
TOTAL HEATING UNITS FOR THE MONTH...........499    DEPARTURE......-143
TOTAL HEATING UNITS FOR THE SEASON.........1120    DEPARTURE......-113
TOTAL HEATING UNITS LAST SEASON TO DATE....1193    DIFFERENCE......-73
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............55 WNW AT  2:52 P.M. *
                   AEROVANE..............54 W   AT  2:16 P.M.
                   ASOS..................55 NW  AT  2:52 P.M.
                   DAVIS.................56 W   AT  2:52 P.M.   
FASTEST MILE FOR YESTERDAY...............45 WNW AT  2:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............40 NW  AT  2:52 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........42 W   AT  2:54 P.M.
AVERAGE WIND SPEED AND DIRECTION.......25.3 W
                   ASOS................24.0
                   DAVIS...............23.5 W [270 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE   DEPARTURE....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.22   DEPARTURE....-0.12
                         ASOS..............4.22
TOTAL PRECIPITATION FOR THE YEAR..........49.33   DEPARTURE....+2.97
                         ASOS.............50.53
                 
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.....-2.5
TOTAL SNOWFALL FOR THE SEASON...............3.0  DEPARTURE.....+0.3
                                               
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 49/41/45/+2/0/125/21      34 NE   AERO 31 MPH NNE
11/13 49/44/47/+4/0/000/00      39 NNE  AERO 37 MPH NNE
11/14 59/49/54/+12/2.08/000/00  39 NE   AERO 38 MPH NE
11/15 60/52/56/+14/0.06/012/02  18 W
11/16 56/43/50/+8/0/527/90      30 NW   AERO 31 MPH NW
11/17 47/35/41/0/0/576/99       28 WNW
11/18 49/34/42/+1/0/313/54      15 SSW
11/19 59/41/50/+9/0/226/39      30 SE
11/20 65/44/55/+15/0.57/219/38  40 W    AERO 41 MPH W
11/21 55/41/48/+8/0/373/65      25 SW 
11/22 49/38/44/+4/0/292/51      28 ENE 
11/23 47/42/45/+6/0.22/000/00   33 NE   AERO 31 MPH ENE
11/24 46/44/45/+6/0.11/000/00   33 NE   AERO 30 MPH NE
11/25 47/43/45/+6/.../000/00    21 N
11/26 50/44/47/+9/.../000/00    22 N
11/27 44/39/42/+4/.../000/00    48 W    AERO 48 MPH W
11/28 49/38/44/+7/.../.../..    55 WNW  AERO 54 MPH W
 
NEW DAILY RECORD FOR NOVEMBER 2009
11/14: NEW RECORD DAILY RAINFALL 2.08 INCHES;
      surpasses previous 1.87 inches in 1972.  
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 29
HIGH 64 IN 1963, 1990
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 5.0 INS IN 1995
PEAK GUST 86 SSE IN 1963
 
RECORDS FOR NOVEMBER 30
HIGH 67 IN 2006
LOW 7 IN 1887, 1929
PRECIP 2.42 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963
 
TODAY'S REPORT PREPARED BY: Andrew Hoell