FPCN39 CWLW 221428
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 SUNDAY 22 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    6     200   6     69    9    1200  16
KAMLOOPS     KEL       9   -3     350   6     73    9    1450  10
OKANAGAN     KEL       9    5     350   6     68    8    1100  16
CASTLEGAR    SPOK      9    4     500  25     79    5    1200  25
CRANBROOK    SPOK     11    3     950  49     81    5    1350  29
REVELSTOKE   KEL       9    4     450   6     64    6    1100  16

*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    S    9   SW  31   SW  70
CRANBROOK             W   28   W   72

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: 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    0     950  18     69    4    1150  18
PR. GEORGE   P.G.      9    2     700   5     69    5    1200  15
SMITHERS     P.G.      9    1     500   5     72    3    1500  15
WELLS GRAY   P.G.      9    3    1000  18    100    5    1950  20
FT NLSN      F.N.     11  -11     550   1     32  -10     850   5
FT STJOHN    F.N.     11   -2     900   1     32    2    1000   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  44   SW  56
SMITHERS              SW  30   SW  56

TODAY'S VENTING: FAIR TO GOOD

VENTING FOR MONDAY: FAIR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9    8     100  18    100   11    1150  27
FRASER VLY   QUIL      9    8      50  18    100   11    1050  27
SRN VRISL    QUIL      9    8       0   8    100   12    1200  23
CNTRL VRISL  QUIL      9    8      50   8    100   11    1000  23
NRN VRISL    HRDY      9    7       0   1    100   10    1250  20
TERRACE      ANT       9    2     200  17     89    3    1200  17
STEWART      ANT       9    4       0   7     89    3    1200  17

*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    SW  35   SW  50   SW  50
PORT HARDY   SW  50   SW  63   SW  65
SANDSPIT     W   37   W   39   W   37

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: FAIR TO GOOD

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

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