FPCN39 CWLW 081535
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 8 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    4     200   0     46    8     800   7
KAMLOOPS     KEL       9    6     350   0     47    8    1050   6
OKANAGAN     KEL       9    7     350   0     47    8    1050   6
CASTLEGAR    SPOK     45    7     900  11     50    8    1200   7
CRANBROOK    SPOK     10    1     950  21     10    4     950   5
REVELSTOKE   KEL       9    4     450   0     42    7    1050   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
PENTICTON    VR   5   E   22   E   43
CRANBROOK             E   11   E   24

TODAY'S VENTING: FAIR

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.     24   -1    1450   3     35    2    1550   5
PR. GEORGE   P.G.     40    0    1450   5     41    2    1450   5
SMITHERS     P.G.      9   -2     500   4     44    1    1450   5
WELLS GRAY   P.G.     23    0    1500   3     34    2    1600   5
FT NLSN      F.N.      9   -7     400   6      9   -2     400   6
FT STJOHN    F.N.      9   -4     700   6      9   -2     700   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
PR. GEORGE            SE  15   E   11
SMITHERS              SE  59   SE  11

TODAY'S VENTING: POOR TO FAIR

VENTING FOR SUNDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9   10     100   4     35   12     650   5
FRASER VLY   QUIL      9    8      50   4     44   13     850   5
SRN VRISL    QUIL      9    9     100   0     25   12     450   4
CNTRL VRISL  QUIL      9   10     150   0     36   13     750   4
NRN VRISL    HRDY     50    9     500  11     53   10     550  11
TERRACE      ANT       9    1     200  10     23    3     300  18
STEWART      ANT      11    5      50   4     11    3      50   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
VANCOUVER    E   31   E   44   E   43
PORT HARDY   SE  52   SE  57   SE  56
SANDSPIT     SE  82   SE  93   SE  87

TODAY'S VENTING: FAIR TO POOR

VENTING FOR SUNDAY: FAIR

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

END/PJS