FPCN39 CWLW 151344
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 15 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    0     200   0     35    3    1150   3
KAMLOOPS     KEL       9   -3     350   2      9    0     350   0
OKANAGAN     KEL       9    0     350   0     31    1    1150   3
CASTLEGAR    SPOK     29    2     850   6     41    7    1100   6
CRANBROOK    SPOK      9   -6     950   3     11    1    1000   3
REVELSTOKE   KEL      29    1    1150   3     30    3    1200   3

*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   SE   9   S   13
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR TO FAIR.

VENTING FOR SUNDAY: 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.     30   -3    1250   8     39    3    1350   5
PR. GEORGE   P.G.     30   -5    1150   6     41   -4    1200   6
SMITHERS     P.G.     31   -2    1200   3     42    0    1200   8
WELLS GRAY   P.G.     27   -2    1250   5     35    3    1350   6
FT NLSN      F.N.      9  -11     400  14      9   -6     400  14
FT STJOHN    F.N.      9   -7     700  14      9   -5     700  14

*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   SE  11
SMITHERS              VR   5   S   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    4     100   7     17    9     200   7
FRASER VLY   QUIL     14    6     100   7     22   12     250   7
SRN VRISL    QUIL     14    6     100   5     21   11     200   6
CNTRL VRISL  QUIL     11    3      50   5     13    6     100   5
NRN VRISL    HRDY     11    7     100   3     18   12     300   3
TERRACE      ANT       9    1     200   5      9    4     200   5
STEWART      ANT       9    3      50   0      9    4      50   0

*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   24   SE  22   S   26
PORT HARDY   SE  37   SE  30   S   33
SANDSPIT     SE  35   SE  33   SE  33

TODAY'S VENTING: POOR.

VENTING FOR SUNDAY: POOR

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


END/DB