FPCN39 CWLW 141427
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 SATURDAY 14 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       9    8     200   4     32   10     850   4
KAMLOOPS     KEL       9    5     350   4     48    9     900  10
OKANAGAN     KEL      25    8     800   4     48   11    1450   4
CASTLEGAR    SPOK      9    6     500   5      9    8     500   5
CRANBROOK    SPOK      9    3     950  58     10    5     950  58
REVELSTOKE   KEL       9    5     450   4     22    7     800   4

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

FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   SW  22   SW  46
CRANBROOK             SW  17   W   50

TODAY'S VENTING: POOR TO FAIR.

VENTING FOR SUNDAY: 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.     63    0    1300  19    100    3    2050  17
PR. GEORGE   P.G.     32    0    1000   8     43    1    1200   8
SMITHERS     P.G.      9   -2     500   1      9   -1     500   1
WELLS GRAY   P.G.     67    0    1400  19    100    2    2000  17
FT NLSN      F.N.     49  -15     800  11     40  -12    1000   7
FT STJOHN    F.N.     78   -8    1500  13     40   -8    1500   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            S    9   W   30
SMITHERS              E   22   S   30

TODAY'S VENTING: POOR TO FAIR EXCEPT GOOD ABOVE 1000 METRES IN THE
SOUTH.

VENTING FOR SUNDAY: 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   11     100  21     28   12     200  21
FRASER VLY   QUIL      9   11      50  21     70   13     350  30
SRN VRISL    QUIL      9   11       0  16     16   12      50  16
CNTRL VRISL  QUIL      9   10      50  16     17   12     100  16
NRN VRISL    HRDY     25    8     250   7     45   10     450  10
TERRACE      ANT       9    0     200   8     25    3     450   8
STEWART      ANT      32    4     400   6     30    3     350   6

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

FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   26   SW  37   SW  46
PORT HARDY   S   61   S   72   S   57
SANDSPIT     NE  20   E   19   SE  15

TODAY'S VENTING: POOR TO FAIR.

VENTING FOR SUNDAY: FAIR TO GOOD.




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


END/MWSO