BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 5, 2012  
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST OF STRATOCUMULUS CLOUDS IS DISSIPATING 
TEMPS. EXPECTED TO AVERAGE AT LEAST 5 DEG. BELOW NORMAL 
TODAY AND MUCH COLDER TONIGHT 

A layer of stratocumulus clouds formed last night and prevented low
temperatures from falling into the 20's throughout the area.  The
clouds were dissipating by early afternoon but with high temperatures
stuck in the middle 40's.  As dew points fall into the low 20's we can
expect a widespread freeze tonight with clear skies expected.  

Today will average at least 5 degrees colder than normal and will become
the first day to average significantly colder than normal since Oct. 13.  

Today's observations:
 
7 A.M.
Weather: Overcast stratocumulus 
Temperature: 35F; Dew Point: 24F; Wind: NNW at 10 kts
Sea-level pressure: 29.98 ins. Hg, rising then more rapidly  
Visibility: 55 miles, except 30 miles NE-SE, distant haze 
24-hour precip: 0.00 inch
6-hour min. temp: 34F
BHO SA 1155 E32 OVC 55 152/35/24/3310/998/ VSBY NE-SE 30 DSNT HZ ALQDS
WND 29V01/ 8/5// 53009 10036 20034 

10 A.M.   
Weather: Overcast stratocumulus, small breaks in overcast 
Temperature: 39F; Dew Point: 23F; Wind: NNW at 9 kts,
Wind: Direction variable WNW-N  
Sea-level pressure: 30.00 ins. Hg, rising, then falling  
Visibility: 40 miles, except 20 miles NE-SE, distant haze     
BHO SA 1455 E34 OVC 40 158/39/23/3309/000/ SML BINOVC ALQDS SUN DMLY VSB
VSBY NE-SE 20 WNW 45 DSNT HZ ALQDS HAZY 8/5// 50006 
 
1 P.M.    
Weather: Broken variable scattered stratocumulus, broken dense 
cirrus layer distant W-N  
Temperature: 42F; Dew Point: 21F; Wind: NW at 10 kts,
Wind: Direction variable W-N  
Sea-level pressure: 29.97 ins. Hg, falling, then more slowly   
Visibility: 55 miles, except 20 miles NE, 25 miles E, hazy,
NW 60 miles, light distant haze  
6-hour max. temp: 45F
BHO SA 1755 E41 BKN 200 BKN 55 148/42/21/3210/997/ 41 BKN V SCT SNS CI
LYR XTDNG DSNT W-N VSBY NE 20 E 25 HAZY SE-S 35 NW 60 DSNT HZ WND 27V01/
8/502 56010 10045 20035 

WEATHER SUMMARY FOR SUNDAY, NOVEMBER 4

TEMPERATURE (DEGREES F)
MAX.....52      NORMAL.....54
MIN.....34      NORMAL.....37
MEAN....43      NORMAL.....45
 
DEPARTURE FROM 30-YEAR NORMAL.....................-2
TOTAL DEPARTURE FOR THE MONTH......................0 [+0.0 DEGREE/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............22    DEPARTURE........+2
TOTAL HEATING UNITS FOR THE MONTH............77    DEPARTURE........+1
TOTAL HEATING UNITS FOR THE SEASON..........485    DEPARTURE......-155
TOTAL HEATING UNITS LAST SEASON TO DATE.....507    DIFFERENCE......-22

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY.............27 NW  AT  8:51 A.M.   
                   AERO..................25 NW  AT  8:51 A.M.  
                   ASOS..................24 NNW AT  5:34 P.M.  
                   DAVIS.................25 WNW AT  8:49 A.M. RMY 26
THE FASTEST MILE FOR YESTERDAY...........17 NNW AT  9:33 A.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE............18 NW  AT  5:35 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........18 NW  AT  8:51 A.M.  
AVERAGE WIND SPEED AND DIRECTION.......11.4 WNW
                   ASOS................11.6 
                   DAVIS...............10.3 NW [310 deg]
* last of several occurrences....

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 THE MONTH..........0.02   DEPARTURE..........-0.61
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE YEAR..........33.22   DEPARTURE.........-11.18
                         ASOS.............33.19

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2012 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized

11/1  56/42/49/+3/0.00/.../..         28 SW  AERO 28 MPH SW  RMY 27
11/2  51/41/46/0/0.02/.../..          24 WNW AERO 22 MPH WNW RMY 22
11/3  52/37/45/-1/0.00/.../..         29 NW  AERO N/A        RMY 28 
11/4  52/34/43/-2/0.00/.../..         27 NW  AERO 25 MPH NW  RMY 26  

11/5  morning low temp: 34F; the normal low is now 37F

DAILY RECORDS FOR NOVEMBER 2012
None so far.

DAILY EXTREMES 
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 1.5 IN 1892
PEAK GUST 69 W IN 2004

RECORDS FOR NOVEMBER 6
HIGH 71 IN 1959
LOW 22 IN 1951
PRECIP 1.72 INCHES IN 1907
SNOWFALL 8.0 IN 1894
PEAK GUST 63 W IN 1973

TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters