FPCN39 CWLW 101439
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 MONDAY 10 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      30    5     750   4     46    9    1050   5
KAMLOOPS     KEL      29    4     800   5     40    7    1050   5
OKANAGAN     KEL      23    3     700   4     40    7    1050   5
CASTLEGAR    SPOK     24    3     800   5     45    9    1100   7
CRANBROOK    SPOK      9   -3     950   5      9    3     950   5
REVELSTOKE   KEL      17    1     650   4     45    7    1100   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   E   26   SE  52
CRANBROOK             E   13   E   37

TODAY'S VENTING: FAIR

VENTING FOR TUESDAY: 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   -1     950   7     13    3    1000   7
PR. GEORGE   P.G.     26   -2     900   9     26    0     950   8
SMITHERS     P.G.     34    0     900   7     34    1     900   7
WELLS GRAY   P.G.      9    0    1000   7     20    4    1150   7
FT NLSN      F.N.      9   -8     400   1     12    0     700   1
FT STJOHN    F.N.      9   -3     700   2     10   -1     750   2

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

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            S   50   S   43
SMITHERS              S   39   S   43

TODAY'S VENTING: POOR

VENTING FOR TUESDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     10    7     100   5     26   12     300   6
FRASER VLY   QUIL     13   11     250   4     35   16     450   6
SRN VRISL    QUIL     13    7     100   5     25   12     300   6
CNTRL VRISL  QUIL     13    6     100   5     22   12     300   5
NRN VRISL    HRDY     15   10     100   8     40   12     350  11
TERRACE      ANT      16    3     250  20     16    6     250  20
STEWART      ANT      29    5     150  15     41    6     250  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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    E   31   SE  48   SE  52
PORT HARDY   SE  50   S   56   SE  50
SANDSPIT     S   26   S   31   S   48

TODAY'S VENTING: POOR TO FAIR

VENTING FOR TUESDAY: FAIR

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


END/MWSO