BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 1, 2006 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MONTH OF OCTOBER 2006 CLIMATE SUMMARY
Mean temp: 51.8 [+0.2] (corr. mean for 24 hrs. = 51.3 deg.)
HDD = 403 [-19]
HDD SEASON: 539 [-52 ]
CDD = 3   [ 0 ] 
CDD SEASON: 641 [+83 ]
Av. vapor pressure: 9.6 mbs. 
Precip: 5.08 ins. [+0.66 ]
Greatest in 24 hours: 2.46 ins. 28th
Sunshine: 196.3 hrs. or 57% [+2%]
Av. wind [uncorr) 13.6 mph
Prevailing: W 22%
Peak wind gust: 64 MPH WSW on 29th *
* large tree snapped off near base 
of hill blocking our summit road 
  
Today's observations:
 
7 A.M.
Weather: Overcast, clearing WSW-NNE    
Temperature: 54F, Dew point: 52F, Wind: WSW at 10 kts
Sea-level pressure: 29.95 inches Hg, rising 
Visibility: 15 miles, thin fog, showers ended 6:30 a.m.     
6-hourly min. temp. 53 deg.
 
BHO SA 1155 E85 OVC 15 141/54/52/2410/995/
LGE BINOVC/SKY CLRG/LINE OF CLRG XTDNG WSW-NNE 
FEW HIER CI VSB VSBY SE-S 10 WNW 20 ABV INVSN 
THN F ALQDS RE30B47E49/ 8/071  53010 ASOS 60005 MANUAL 6006/ 
ASOS 70005 MANUAL 70006 10056 20053
  
10 A.M.   
Weather: Clear, few clouds forming  
Temperature: 62F, Dew point: 50F, Wind: W at 10 kts
Sea-level pressure: 29.98 inches Hg, rising
Visibility: 20 miles, hazy
 
BHO SA 1455 CLR 20 154/62/50/2810/998/ CUFRA FRMG SW-N
FEW AC DSNT SE-S HAZY/ 8/140 51013  
 
1 P.M.   
Weather: Scattered clouds   
Temperature: 65F, Dew point: 48F, Wind: SSW at 06 kts
Sea-level pressure: 29.96 inches Hg, falling
Visibility: 30 miles, hazy, WNW 45 miles  
6-hourly max. temp. 66 deg.
 
BHO SA 1755 38 SCT 30 146/65/48/2006/996/ FEW MDT CU TOPS 
FEW ACSL SE-S VSBY WNW 45 HAZY/ 8/240 58008 10066 20054
 
WEATHER SUMMARY FOR TUESDAY, OCTOBER 31 
 
TEMPERATURE (DEGREES F)
MAX.....64   NORMAL.....55 
MIN.....45   NORMAL.....39   
MEAN....55   NORMAL.....47   
DEPARTURE FROM 30-YEAR NORMAL........+8 
TOTAL DEPARTURE FOR THE MONTH....... +15 [+0.2 DEG/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........10   DEPARTURE....- 8
TOTAL HEATING UNITS FOR OCTOBER...........403   DEPARTURE....-19 
TOTAL HEATING UNITS FOR THE SEASON....... 539   DEPARTURE... -52
TOTAL HEATING UNITS LAST SEASON TO DATE.. 461   DIFFERENCE...+78
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.......... 31 SSW AT 6:00 P.M. *  
                   AEROVANE........... 31 SSW AT 6:00 P.M.     
                   ASOS............... 29 SSW AT 6:00 P.M.     
                   DAVIS.............. 34 S   AT 6:00 P.M.   
FASTEST MILE FOR YESTERDAY............ 23 SSW AT 6:51 P.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE......... 24 SSW AT 6:46 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE........ 27 S   AT 6:46 P.M.          
AVERAGE WIND SPEED AND DIRECTION...... 16.2 S 
                   ASOS............... 16.1    
                   DAVIS.............. 16.0 SSW [200 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06  DEPARTURE.....-0.09    
                         ASOS..............0.05
TOTAL PRECIPITATION FOR OCTOBER............5.08  DEPARTURE.....+0.66 
                         ASOS..............5.05    
TOTAL PRECIPITATION FOR THE YEAR..........51.22* DEPARTURE.....+9.34*
                         ASOS.............50.74* 
* DATA UPDATED AND CORRECTED THRU 10/31
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2006......CALENDAR DAY DATA
DATA REPORTED:
DATE  MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
10/1  56/51/54/-3/0.48/000/00   32 E
10/2  64/46/55/-1/0/407/58      32 W   Aero 34 MPH W 
10/3  74/50/62/+6/T/615/88      26 SSW  
10/4  76/60/68/+12/0.01/592/85  31 SSW  
10/5  65/47/56/+1/0.09/493/71   40 NW  Aero 43 MPH NW
10/6  55/43/49/-6/0/407/59      39 NNE Aero 39 MPH NNE
10/7  57/45/51/-4/0/515/75      28 NE
10/8  70/43/57/+3/0/617/90      23 SSW      
10/9  78/49/64/+10/0/675/99     24 WSW      
10/10 62/50/56/+2/0/469/69      24 NNE 
10/11 58/51/55/+2/0.60/41/06    35 ENE
10/12 72/55/64/+11/0.52/216/32  38 ESE
10/13 56/38/47/-5/T/590/88      36 W
10/14 59/40/50/-2/0/595/89      40 W
10/15 57/37/47/-5/0/406/61      36 SSW   
10/16 59/37/48/-3/0/650/98      22 S
10/17 52/44/48/-3/0.19/007/01   29 ESE  
10/18 67/50/59/+8/T/099/15      39 SE  Aero 40 MPH SE
10/19 64/50/57/+6/0/203/31      20 S  
10/20 62/41/52/+2/0.43/000/00   55 WSW Aero 54 WSW
10/21 54/37/46/-4/0/636/98      35 W  
10/22 57/33/45/-5/0.01/439/68   24 SE
10/23 53/40/47/-2/0.29/109/17   28 W 
10/24 51/39/45/-4/T/307/48      29 W
10/25 54/36/45/-4/0/536/84      40 WNW Aero 43 MPH WNW
10/26 48/35/42/-6/0/305/48      36 WNW 
10/27 52/31/42/-6/0/608/96      20 S 
10/28 62/41/52/+4/2.46/000/00   62 SSE Aero 60 MPH SSE  
10/29 51/42/47/0/0/458/73       64 WSW Aero 58 MPH WSW
10/30 57/40/49/+2/0/625/100     46 WSW 
10/31 64/45/55/+8/0/156/25      31 SSW
 
11/1  morning low temp. 53; normal now 38 deg.  
      rainfall: 0.06 in.
 
10/28 - NEW DAILY RECORD RAINFALL: 2.46 INS;  
PREVIOUS RECORD 1.92 INS. IN 1902  
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 1
HIGH 75 IN 2003
LOW 22 IN 1913,1923
PRECIP 2.93 INCHES IN 1985
SNOWFALL TRACE IN 1906,1951
PEAK GUST 78 ESE IN 1997
 
RECORDS FOR NOVEMBER 2
HIGH 81 IN 1950
LOW 22 IN 1965
PRECIP 1.67 INCHES IN 1970
SNOWFALL 0.2 IN 1906,1951
PEAK GUST 63 WSW IN 1973
 
TODAY'S REPORT BY: Robert Skilling