FPCN39 CWLW 031400
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 PDT SUNDAY 3 OCTOBER 1999 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   10     600   0     59   18    1600   5
KAMLOOPS     KEL       9    8     600   0     54   16    1550   5
OKANAGAN     KEL       9    6     500   0     34   15    1500   2
CASTLEGAR    SPOK     17    8     750   3     42   15    1400   4
CRANBROOK    SPOK      9    4     950   6     54   12    1900   6
REVELSTOKE   KEL       9    7     600   0     28   13    1250   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SW   9   W   22   W   43
CRANBROOK             W   20   W   57

TODAY'S VENTING: 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.      9    5     950  14     80   10    1650  16
PR. GEORGE   P.G.     23    6     800  13     50    9    1050  14
SMITHERS     P.G.     20    6     700   6     44    9     950  10
WELLS GRAY   P.G.     18    5     850   8     85   10    1750  16
FT NLSN      F.N.     21    2     750   4     52    5     950  10
FT STJOHN    F.N.     36    5    1150   7    100    8    1850  18

*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            W   30   NW  46
SMITHERS              SW  46   W   46

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     11   11     150   2     14   16     350   2
FRASER VLY   QUIL     11   12     200   2     21   20     950   1
SRN VRISL    QUIL     12   12     150   2     21   19     700   2
CNTRL VRISL  QUIL     12   13     200   2     21   19     700   2
NRN VRISL    HRDY     14   10     200   3     48   12     950   5
TERRACE      ANT      55    8     550  19     93   10     950  21
STEWART      ANT      20    9     150   8     61   10     500  13

*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    VR   5   W   19   W   31
PORT HARDY   N    9   NW  15   W   33
SANDSPIT     W   24   W   37   W   39

TODAY'S VENTING: FAIR

VENTING FOR MONDAY: FAIR

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

$$$$^^