FPCN39 CWLW 171414
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 TUESDAY 17 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      13    6     550   1     42    9    1550   2
KAMLOOPS     KEL      11    5     550   1     47    9    1750   2
OKANAGAN     KEL      11    4     550   1     43    8    1650   2
CASTLEGAR    SPOK     10    5     550   1     40    8    1750   2
CRANBROOK    SPOK     10    4     550   1     50    8    1750   2
REVELSTOKE   KEL      10    4     550   1     34    8    1750   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   17   W   30
CRANBROOK             VR   5   NW  15

TODAY'S VENTING: FAIR.



VENTING FOR WEDNESDAY: POOR



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.     37    1    1150  16    100    7    2450  16
PR. GEORGE   P.G.     25   -3    1000   6     28    0    1050   6
SMITHERS     ANT      30    0     700  12     74    4    1300  12
WELLS GRAY   P.G.      9   -1    1000  16     75    3    1450  16
FT NLSN      F.N.      9  -18     400   3     16  -16     600   3
FT STJOHN    F.N.     32  -13    1450   3     33  -12    1500   3


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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   43   W   39
SMITHERS              W   31   W   39

TODAY'S VENTING: GOOD IN THE WEST AND SOUTH. POOR IN THE NORTH AND
EAST.


VENTING FOR WEDNESDAY: POOR.


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     16    7     200   5     60   11   1200    5
FRASER VLY   QUIL      9    7     200   0     60   11   1200    5
SRN VRISL    QUIL      9    8     250   0     60   11   1200    5
CNTRL VRISL  QUIL      9    7     200   0     45    9   900     0
NRN VRISL    HRDY     15    7     150   5     58    9   1200    7
TERRACE      ANT       9    0     200  13     61    2   900    13
STEWART      ANT      56    4     600  10     14    2   100     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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   19   W   31   W   37
PORT HARDY   W   31   W   37   W   37
SANDSPIT     W   28   W   37   W   44

TODAY'S VENTING: GENERALLY GOOD.


VENTING FOR WEDNESDAY: POOR.


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


END/GF