FPCN39 CWLW 101433
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 10 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      12    3     500   1     44    7    1200   4
KAMLOOPS     KEL      11    3     600   1     66    8    1800   5
OKANAGAN     KEL      11    2     500   1     66    8    1800   5
CASTLEGAR    KEL      14    2     600   5     59    5    1550   6
CRANBROOK    KEL       9   -2     950   7     45    4    2000   4
REVELSTOKE   KEL      10    2     550   1     53    5    1450   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   15   W   31
CRANBROOK             W   19   W   50

TODAY'S VENTING: GOOD TO FAIR


VENTING FOR WEDNESDAY: GOOD 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   -2     950   4     52    1    1600   8
PR. GEORGE   P.G.      9   -2     700   1     18    0     850   5
SMITHERS     P.G.      9   -4     500   1     22    1     800   5
WELLS GRAY   P.G.      9    0    1000   4     49    2    1600   8
FT NLSN      F.N.     26   -7     650   7     62   -4    1300   8
FT STJOHN    F.N.     61   -6    1500   9     80   -5    1800  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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   28   NW  50
SMITHERS              W   26   NW  50

TODAY'S VENTING: FAIR TO POOR EXCEPT GOOD NORTHEAST

VENTING FOR WEDNESDAY: FAIR TO POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    HRDY     38    7     350  12     63    9     650  13
FRASER VLY   HRDY     37    7     350  12     62    9     600  13
SRN VRISL    HRDY     32    7     250  10     58    9     550  12
CNTRL VRISL  HRDY     32    7     300  10     48    8     450  12
NRN VRISL    HRDY     20    6     150  10     58    9     550  12
TERRACE      ANT       9    0     200   2     16    5     450   3
STEWART      ANT      12    4     100   3     12    5     100   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
VANCOUVER    VR   5   VR   5   W   11
PORT HARDY   VR   5   NW  13   NW  26
SANDSPIT     W   11   W   20   NW  30

TODAY'S VENTING: GOOD TO FAIR EXCEPT POOR NORTH

VENTING FOR WEDNESDAY: GOOD TO FAIR

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


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