FPCN39 CWLW 091443
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 9 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   7     24    7     400   7
KAMLOOPS     KEL       9    5     350   7     23    7     550   7
OKANAGAN     KEL       9    6     350   7     36    7     700   9
CASTLEGAR    SPOK     20    5     850   3     23    8    1000   3
CRANBROOK    SPOK      9    0    1000   3     19    5    1100   6
REVELSTOKE   KEL       9    3     450   7     64    8    1500   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    SE   9   SE  22   S   31
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR

VENTING FOR MONDAY: 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.     54   -1    1400  12     54    0    1400  12
PR. GEORGE   P.G.     57   -2    1350   9     57   -1    1400   9
SMITHERS     P.G.     64    0    1350   9     64    2    1400   9
WELLS GRAY   P.G.     50    1    1500  10     50    2    1500  10
FT NLSN      F.N.      9   -9     400   6     23   -1     650   6
FT STJOHN    F.N.      9   -5     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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SE  43   SE  35
SMITHERS              SE  69   SE  35

TODAY'S VENTING: FAIR

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    7     100   8     25   12     300   8
FRASER VLY   QUIL     26   12     300   8     40   15     450   9
SRN VRISL    QUIL     16    8     100   7     27   12     250   8
CNTRL VRISL  QUIL     19    9     150   8     26   12     250   8
NRN VRISL    HRDY     45    9     250  17     52   11     300  18
TERRACE      ANT       9    2     200  25      9    3     200  25
STEWART      ANT       9    5      50   8      9    3      50   8

*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    SE  39   SE  48   SE  48
PORT HARDY   SE  80   SE  94   S   80
SANDSPIT     SE 115   S  124   SE 124

TODAY'S VENTING: POOR

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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