FPCN39 CWLW 031427
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 TUESDAY 3 NOVEMBER 1998 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    6     200   0     40    9    1000   4
KAMLOOPS     KEL       9    5     350   0     44    9    1350   4
OKANAGAN     KEL      19    6     700   3     46   10    1450   4
CASTLEGAR    SPOK     22    5     800   4     38    8    1300   4
CRANBROOK    SPOK     33    4    1350   6     76    6    2000  10
REVELSTOKE   KEL       9    4     450   0     41    8    1350   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   S   17   S   19
CRANBROOK    VR   5   VR   5   S   11

TODAY'S VENTING: POOR BECOMING FAIR IN THE AFTERNOON.

VENTING FOR WEDNESDAY: 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   6     44    3    1600   7
PR. GEORGE   P.G.     15    3     900   3     40    5    1450   5
SMITHERS     P.G.      9    3     550   1      9    4     550   1
WELLS GRAY   P.G.     15    3     900   7     44    5    1450   7
FT NLSN      F.N.      9   -3     400   4     18    0     600   4
FT STJOHN    F.N.     22    0    1050   4     22    0    1050   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE   VR   5   S   24   S   20
SMITHERS     VR   5   SE  22   S   20

TODAY'S VENTING: POOR

VENTING FOR WEDNESDAY: FAIR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     16    9     200   7     35   13     350  11
FRASER VLY   QUIL     17    9     150   7     33   12     300  11
SRN VRISL    QUIL     16    9     150   6     32   13     350   8
CNTRL VRISL  QUIL     19   10     200   6     23   12     300   6
NRN VRISL    HRDY      9    9       0  14     61   12     500  15
TERRACE      ANT       9    3     200  15     10    6     250  15
STEWART      ANT      10    6      50   2     10    6      50   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SE  30   S   37   S   37
PORT HARDY   SE  46   S   54   S   35
SANDSPIT     SE  74   S   65   S   50

TODAY'S VENTING: POOR.

VENTING FOR WEDNESDAY: FAIR


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


END/LEC