FPCN39 CWLW 021535
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 7:00 AM PST SUNDAY 2 NOVEMBER 1997 FOR TODAY.

VENTILATION INDICES (TEMPERATURE) AND MIXING HEIGHTS.
MIXING HEIGHTS IN METRES ABOVE SEA LEVEL.
AVERAGE WINDS IN KNOTS.

SPOT INDICES ARE DETERMINED BY THE ASPECT AND ELEVATION OF THE SITES.
COMPARE WINDS, TEMPERATURES AND ELEVATION WITH THE SITES HERE
TO DETERMINE THE INDEX IN ANY OTHER AREA.

SOUTHERN INTERIOR

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
FRSR CANYN   KEL      37    9     650   7     56   12    1050  15
KAMLOOPS     KEL      31    8     700   7     56   11    1200  12
OKANAGAN     KEL      26    7     650   7     55   11    1200  10
CASTLEGAR    SPOK      9    6     750   0     33   10     850  10
CRANBROOK    SPOK      9    4    1050   3     47   11    1350  11
REVELSTOKE   KEL      21    6     650   7     33    8     850   7

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    S   11   SW  31   SW  65
CRANBROOK             SW  13   W   46

TODAY'S VENTING: GOOD.

VENTING FOR MONDAY: FAIR

CENTRAL INTERIOR/NORTHEAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
WILLIAMS L   P.G.     17    5     950  10     70    8    1650  15
PR. GEORGE   P.G.     17    4     800   6     58    7    1050  13
SMITHERS     P.G.     15    5     750   3     44    7     900  10
WELLS GRAY   P.G.     22    5    1000  14     78    7    1900  18
FT NLSN      F.N.      9   -4     400   4     16   -1     500   8
FT STJOHN    F.N.      9    4     700   7     32    5    1000  10

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  65   SW  85
SMITHERS              SW  54   W   85

TODAY'S VENTING: GOOD.

VENTING FOR MONDAY: FAIR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     22   11     200   7     36   13     250  14
FRASER VLY   QUIL     21   10     150   7     35   13     250  14
SRN VRISL    QUIL     14    9     100   6     34   13     250  10
CNTRL VRISL  QUIL     17   11     150   6     34   13     250  10
NRN VRISL    HRDY     44   11     550  10     76   14    1050  15
TERRACE      ANT       9    7     200   5     62    9    1050  10
STEWART      ANT      17    9     150   4     17    7     350   7

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   41   SW  59   SW  80
PORT HARDY   W   31   W   41   SW  57
SANDSPIT     W   41   W   43   W   44

TODAY'S VENTING: FAIR.

VENTING FOR MONDAY: FAIR

VENTILATION GUIDELINES:
          0-33.....POOR
          34-54.....FAIR
          55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.


END/MW