FPCN39 CWLW 161333
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 16 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   -2     200   1     39    2    1050   4
KAMLOOPS     KEL      33    0    1050   4     33    0    1050   4
OKANAGAN     KEL      33    0    1050   4     32    1    1050   3
CASTLEGAR    SPOK      9    0     750   0     26    5     950   4
CRANBROOK    SPOK      9   -7     950  14      9    1     950  14
REVELSTOKE   KEL      31    0    1050   4     32    1    1100   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
PENTICTON    VR   5   S   17   S   22
CRANBROOK             VR   5   W   20

TODAY'S VENTING: POOR TO FAIR.

VENTING FOR MONDAY: 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.     15   -7    1250   3     25   -5    1300   3
PR. GEORGE   P.G.     25   -5    1250   4     26   -3    1300   4
SMITHERS     P.G.     49   -3    1250   5     34   -2    1300   5
WELLS GRAY   P.G.     37   -6    1300   4     39   -5    1300   5
FT NLSN      F.N.      9  -14     400   5      9  -10     400   8
FT STJOHN    F.N.      9   -8     700   8     33   -6    1050  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            S   15   SW  13
SMITHERS              SE  24   SE  13

TODAY'S VENTING: POOR TO 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    6     100  28      9    9     100  28
FRASER VLY   QUIL      9    7      50  28     30   11     150  28
SRN VRISL    QUIL     11    7      50   5     15   11     150   5
CNTRL VRISL  QUIL      9    3      50   5      9    5      50   5
NRN VRISL    HRDY     29    9     300   8     38   11     350  11
TERRACE      ANT       9    0     200   5      9    1     200   5
STEWART      ANT      11    4      50   4      9    1       0   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    SE  31   SE  33   S   31
PORT HARDY   SE  46   SE  46   SE  35
SANDSPIT     SE  30   SE  30   SE  31

TODAY'S VENTING: POOR TO FAIR.

VENTING FOR MONDAY: FAIR

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


END/DB