FPCN39 CWLW 161431
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 16 NOVEMBER 1998 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     100    7    2000  20    100   11    3000  20
KAMLOOPS     KEL       9    6     350   2    100   10    3000  10
OKANAGAN     KEL       9    6     350   2    100   11    3000  10
CASTLEGAR    SPOK      9    3     500   7    100    9    3000  10
CRANBROOK    SPOK      9    3    1000   5    100    9    3000  10
REVELSTOKE   KEL       9    4     450   2     40    8    1200   8

*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   SW  20   W   44
CRANBROOK             W   17   W   46

TODAY'S VENTING: GOOD EXCEPT FAIR IN THE NORTHEAST.

VENTING FOR TUESDAY: FAIR TO GOOD.




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.     47    0    1600   7     55    4    1800   7
PR. GEORGE   P.G.     14   -7    1150   1     18   -4    1300   2
SMITHERS     P.G.     20   -3    1250   2     21   -2    1300   2
WELLS GRAY   P.G.     24   -4    1450   4     45    0    1650   7
FT NLSN      F.N.      9  -17     400   5     20  -15     750   5
FT STJOHN    F.N.      9  -14    1000   5     20  -12    1050   5

*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            SW  41   W   50
SMITHERS              S   35   SW  50

TODAY'S VENTING: POOR EXCEPT GOOD SOUTH OF QUESNEL THIS AFTERNOON.

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      9    9     100  10    100   11    2000  17
FRASER VLY   QUIL      9    9      50  10    100   12    2000  20
SRN VRISL    QUIL     12    9      50   5    100   11    2000   8
CNTRL VRISL  QUIL      9    8      50   5    100   10    2000   8
NRN VRISL    HRDY      9    7       0   7    100   10    2000  10
TERRACE      ANT       9    0     200   8     60    1     700  20
STEWART      ANT      16    3     150   5     40    1     500  15

*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    S   31   SW  44   SW  44
PORT HARDY   S   35   SW  43   SW  46
SANDSPIT     NW  30   NW  35   NW  30

TODAY'S VENTING: GOOD EXCEPT FAIR EXTREME NORTH.

VENTING FOR TUESDAY: FAIR TO GOOD.




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


END/JDG