BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, DECEMBER 1, 2010
ALL TIMES ARE IN EASTERN STANDARD TIME
 
NOVEMBER TEMPERATURES FINISH ABOVE AVERAGE 
BY ONLY 0.2F DEGREE...11TH CONSECUTIVE MONTH ABOVE NORMAL
PRECIPITATION BELOW AVERAGE
SNOWFALL BELOW AVERAGE
 
THE NOVEMBER 2010 STATS
 
TEMPERATURE DEG. F
Av. Max. 49.0
Av. Min. 35.0
Mean     42.0 [+0.2]
24-hr. corr. mean 41.9
Max. temp: 62 on 17th
Min. temp: 22 on 28th
Total precipitation: 4.31 ins. [-0.33 in.]
Total snowfall: 0.1 inch [ -2.6 ins. ]
Total heating degree day units: 683 [-15]  
Total heating degree day units (season) 1160 [-129]
Av. wind speed 12.9 MPH WNW 17%
Av. corrected wind speed: 13.2 MPH WNW
Peak gust: 60 MPH N on 8th
Peak fastest mile: 43 MPH N on 8th
Sunshine:
Astronomical total minutes: 7406; possible 17650 or 42%
Campbell-Stokes sunshine cards: 7158 mins; possible 17010 or 42%
 
 
Today's observations: 
 
7 A.M.
Weather: Broken stratocumulus, two layers, overcast altocumulus
duplicatus stratiformis, higher dense cirrus/cirrostratus visible,
few stratus fractus northeast thru east
Temperature: 47F, Dew point: 45F; Wind: ESE at 15G26 kts,
Wind: Peak wind 26 kts ESE at 6:48 A.M. 
Sea-level pressure: 30.14 inches Hg, falling 
Visibility: 25 miles, thin fog 
6-hour minimum temp: 43F
24-hour precip: trace 
BHO SA 1155 E50 BKN 80 BKN 95 OVC 25 208/47/45/1115G26/014/
FEW STFRA NE-E HIER DNS CI/CS VSB THN FG PK WND 1126/48/
8/577 56035 10047 20043
 
10 A.M.
Weather: Broken altocumulus, overcast altostratus,
few stratocumulus, higher dense cirrus visible distant
NNE-SSE, sun dimly visible 
Temperature: 51F, Dew point: 46F; Wind: ESE at 15G26 kts,
Wind: Peak wind 26 kts from ESE at 9:47 A.M.
Wind: Direction variable E-SSE
Sea-level pressure: 30.09 inches Hg, falling 
Visibility: 25 miles, 35 miles southeast, light haze
3-hourly precip: trace 
BHO SA 1455 E80 BKN 130 OVC 25 190/51/46/1215G26/009/
ACSL N-SE HIER DNS CI CLDS VSB NE-SSE FEW LWR SC VIRGA
SUN DMLY VSB VSBY SE 35 PK WND 1126/47/ WND 10V16/
8/572 58018 MANUAL 6000/ 
 
1 P.M.
Weather: Scattered stratus fractus, broken stratocumulus,
overcast nimbostratus, light rain shower began 12:25 P.M.
ended 12:35 P.M.  
Temperature: 53F, Dew point: 47F; Wind: ESE at 20G33 kts,
Wind: Peak wind 33 kts ESE at 12:47 P.M.
Wind: Direction variable E-S 
Sea-level pressure: 29.95  inches Hg, FALLING RAPIDLY 
Visibility: 25 miles, 20 S-SW rain showers, light haze
6-hour max. temp: 54F 
6-hourly precip: trace
BHO SA 1755 18 SCT E25 BKN 50 OVC 25 141/53/47/1220G33/995/
VSBY S-SW 20/PCPN LGT HZ PK WND 1233/47/ WND 09V17 RB25E35 PRESFR/
8/72/ 58049 MANUAL 6000/ 10054 20047 
 
WEATHER SUMMARY FOR TUESDAY, NOVEMBER 30
 
TEMPERATURE (DEGREES F)
MAX.....49     NORMAL.....44
MIN.....35     NORMAL.....29
MEAN....42     NORMAL.....37
 
DEPARTURE FROM 30-YEAR NORMAL................+5
TOTAL DEPARTURE FOR THE MONTH...............+13 [+0.2 DEGREE/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............23    DEPARTURE........-5
TOTAL HEATING UNITS FOR THE MONTH...........683    DEPARTURE.......-15
TOTAL HEATING UNITS FOR THE SEASON.........1160    DEPARTURE......-129
TOTAL HEATING UNITS LAST SEASON TO DATE....1160    DIFFERENCE........0
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............21 ESE  AT 8:47 P.M.
                   AEROVANE...............24 ESE  AT 8:47 P.M. 
                   ASOS.................. 21 SE   AT 8:47 P.M.
                   DAVIS..................22 ESE  AT 8:22 P.M.
THE FASTEST MILE FOR YESTERDAY............16 ESE  AT 8:29 P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE.............16 ESE  AT 8:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............16 E    AT 8:48 P.M.
AVERAGE WIND SPEED AND DIRECTION..........10.0 SE
                   ASOS....................9.3       
                   DAVIS...................9.5 ESE [120 DEG]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE........-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR NOVEMBER...........4.31  DEPARTURE........-0.33
                         ASOS..............4.36
TOTAL PRECIPITATION FOR THE YEAR..........58.03  DEPARTURE.......+11.37
                         ASOS.............57.91**
** ASOS missing rainfall due to system failure on 6/24-25
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1
TOTAL SNOWFALL FOR NOVEMBER.................0.1  DEPARTURE.....-2.6
TOTAL SNOWFALL FOR THE SEASON...............0.1  DEPARTURE.....-2.8 
 
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER-DECEMBER 2010 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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  49/29/39/-8/0.00/446/72      24 WNW
11/2  46/33/40/-6/0.00/271/44      21 NW
11/3  50/28/39/-7/0.00/264/43      20 SSE
11/4  54/37/46/0/0.91/000/00       43 NNE  AERO 45 MPH NE
11/5  59/44/52/+7/0.51/000/00      36 S    AERO 39 MPH S
11/6  48/38/43/-2/000/0.0/134/22   20 N
11/7  42/33/38/-7/0.17/T/012/02    32 NW
11/8  47/32/40/-4/1.17/0.1/000/00  60 N    AERO 60 MPH N
11/9  50/42/46/+2/0.21/0.0/006/01  32 N    AERO 35 MPH N
11/10 45/39/42/-2/0.17/0.0/006/01  38 N    AERO 42 MPH N
11/11 45/37/41/-2/0.00/0.0/411/69  43 NNE  AERO 43 MPH NNE
11/12 53/35/44/+1/0.00/0.0/594/100 23 N  
11/13 61/42/52/+9/0.00/0.0/592/100 20 N 
11/14 50/41/46/+4/0.00/0.0/153/26  25 NNE
11/15 52/44/48/+6/0.00/0.0/018/03  15 SE 
11/16 54/46/50/+8/0.09/0.0/023/04  20 E
11/17 62/46/54/+13/0.95/0.0/204/35 45 WSW  AERO 48 MPH WSW
11/18 52/37/45/+4/0.00/0.0/540/93  51 W    AERO 55 MPH W
11/19 43/32/38/-3/0.00/0.0/423/73  26 W
11/20 51/31/41/+1/0.00/0.0/334/58  40 W    AERO 44 MPH W
11/21 37/29/33/-7/0.00/0.0/569/99  22 NW
11/22 53/31/42/+2/0.01/0.0/000/00  32 SSE  AERO 33 MPH SSE
11/23 60/47/54/+15/0.00/0.0/006/01 50 WNW  AERO 52 MPH WNW
11/24 47/29/38/-1/0.00/0.0/553/97  50 WNW  AERO 55 MPH WNW
11/25 39/26/33/-6/0.00/0.0/011/02  27 WNW 
11/26 44/29/37/-1/0.12/T/000/00    35 W    AERO 38 MPH W
11/27 41/27/34/-4/0.00/0.0/452/80  43 WSW  AERO 46 MPH WSW
11/28 42/22/32/-5/0.00/0.0/558/99  33 W    AERO 36 MPH W
11/29 45/30/38/+1/0.00/0.0/556/99  17 W
11/30 49/35/42/+5/0.00/0.0/263/47  21 ESE
 
12/1  our morning low temp: 43F; the normal low now is 29F
 
NEW DAILY RECORDS FOR NOVEMBER 2010
None 
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR DECEMBER 1
HIGH 70 IN 2001
LOW 3 IN 1887
PRECIP 1.46 INS. IN 1917
SNOW 2.0 INS. IN 1902
PEAK GUST 72 MPH NW IN 1964
 
RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Chris Torchia