FPCN39 CWLW 151433
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 MONDAY 15 FEBRUARY 1999 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      21    2     650   3     35    7    1350   2

KAMLOOPS     KEL      14    0     600   2     39    6    1500   3

OKANAGAN     KEL      13   -1     500   2     31    5    1300   2

CASTLEGAR    SPOK      9    0     500   3     30    5     950   5

CRANBROOK    SPOK      9   -4     950   8     38    2    1350   8

REVELSTOKE   KEL      18    0     800   2     23    2    1100   2


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

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    S    9   S   20   SW  35
CRANBROOK             SW   9   W   20

TODAY'S VENTING: POOR TO FAIR.




VENTING FOR TUESDAY: POOR TO 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.      9   -4     950  14     34    1    1100   9

PR. GEORGE   P.G.     16   -5     800   6     32    0    1000   9

SMITHERS     P.G.     11   -5     700   1     19    0     900   3

WELLS GRAY   P.G.     ##   ##     ###  ##     80    1    3000  10

FT NLSN      F.N.      9  -11     400   5      9   -7     400   5

FT STJOHN    F.N.      9   -3     700  13     57    0    1150  14


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

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            S   35   S   33
SMITHERS              SE  37   S   33

TODAY'S VENTING: POOR TO FAIR EXCEPT GOOD ABOVE ABOUT 1200 METRES.




VENTING FOR TUESDAY: POOR TO FAIR.




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     25    5     200  13    100    8    1200  23

FRASER VLY   QUIL      9    4      50  13    100    8    1050  23

SRN VRISL    QUIL     24    5     200   9     86    8     800  17

CNTRL VRISL  QUIL     26    6     250   9     94    8     850  18

NRN VRISL    HRDY     39    6     200  22     94    7     600  26

TERRACE      ANT       9    0     200  38     51    2     250  38

STEWART      ANT      ##   ##     ###  ##     29    2       0  21


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

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SE  37   S   48   S   52
PORT HARDY   SE  74   SE  87   S   72
SANDSPIT     SE 109   SE 111   S   94

TODAY'S VENTING: GOOD SOUTH. POOR TO FAIR NORTH.




VENTING FOR TUESDAY: FAIR.




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


END/TCS