FPCN39 CWLW 301415
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 30 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      32    6     500  15     72    7    1600  15
KAMLOOPS     KEL      13    5     500   3     64    6    1700  10
OKANAGAN     KEL       9    2     450   3     55    6    1600   7
CASTLEGAR    SPOK      9    5     550   9     66    6    1400   7
CRANBROOK    SPOK      9    2    1050  13     56    5    1400   7
REVELSTOKE   KEL       9    1     500   3     56    2    1050   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   17   W   37
CRANBROOK             W   13   W   37

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: FAIR TO 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.     19    2    1050  10     82    5    2300  10
PR. GEORGE   P.G.     28    2     800   8     57    2    1300   8
SMITHERS     P.G.      9   -2     600   0     45    0     900   6
WELLS GRAY   P.G.     30    3    1650  10     82    4    1700  12
FT NLSN      F.N.      9  -12     450   3     11  -10     450   3
FT STJOHN    F.N.     33   -1    1250   5     64    2    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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   43   W   50
SMITHERS              SW  37   SW  50

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: FAIR TO POOR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     57   10     750  15     92   11    1400  15
FRASER VLY   QUIL     28    9     250  10     85   11    1300  10
SRN VRISL    QUIL     19    9     150   9     82   11    1150  15
CNTRL VRISL  QUIL      9    8      50   8     57   10    1050  10
NRN VRISL    HRDY     13    7     150   3     62    9     900   8
TERRACE      ANT       9    1     200   4     34    2     350   8
STEWART      ANT       9    4      50   3     30    2     300   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   20   SW  28   W   30
PORT HARDY   SW  24   SW  30   W   41
SANDSPIT     S   50   SW  52   SW  59

TODAY'S VENTING: GOOD EXCEPT FAIR TO POOR NORTH COAST

VENTING FOR MONDAY: POOR

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


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