FPCN39 CWLW 011534
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 1 NOVEMBER 1997 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   10     200   5     55   13     500  10
KAMLOOPS     KEL       9    7     350   5     45   12     600   5
OKANAGAN     KEL       9    9     350   5     55   13     850   9
CASTLEGAR    SPOK     38    8     700  10     60   11    1150  10
CRANBROOK    SPOK     47    7    1200  10     76   10    1650  10
REVELSTOKE   KEL       9    7     500   5     26   10     700   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
PENTICTON    VR   5   SW  13   W   24
CRANBROOK             W   11   NW  33

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: 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.     13    5    1000   5     80    8    1900   8
PR. GEORGE   P.G.     13    5     700   5     82    8    1450   8
SMITHERS     P.G.     14    4     650   4     55    8    1050   8
WELLS GRAY   P.G.     19    4    1000   8     82    9    4000   8
FT NLSN      F.N.      9   -1     400   6     17    0     400   8
FT STJOHN    F.N.     33    5     800  15     55    7     800  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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  28   W   35
SMITHERS              SW  39   SW  35

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: FAIR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9   10     100   7     83   14    1350   9
FRASER VLY   QUIL      9   11      50   7     68   14    1000   9
SRN VRISL    QUIL     15   11     150   5     83   15    1400   9
CNTRL VRISL  QUIL     12   10     100   5     55   14    1000   7
NRN VRISL    HRDY      9    9     100   3     36   12     450   7
TERRACE      ANT      10    8     250   7     62   10    1100   7
STEWART      ANT       9    8     150   6     27   10     250   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    SE  17   S   17   SW  24
PORT HARDY   S   43   S   39   SW  35
SANDSPIT     SW  35   SW  46   SW  56

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: FAIR

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


END/