FPCN39 CWLW 221400
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 TUESDAY 22 JUNE 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      17   17     600   2    100   20    3200   8
KAMLOOPS     KEL      50   17    1200   6    100   22    3350   8
OKANAGAN     KEL      25   16     700   5    100   21    3350   8
CASTLEGAR    SPOK     51   15     900  12    100   20    2300  11
CRANBROOK    SPOK     59   14    1550  10    100   19    3950  12
REVELSTOKE   KEL      10   13     500   2    100   17    3450   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W   13   W   33   W   63
CRANBROOK             W   17   W   39

TODAY'S VENTING: GOOD




VENTING FOR WEDNESDAY: GOOD




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.    100   11    2400  22    100   16    3950  21
PR. GEORGE   P.G.    100   11    1800  20    100   14    2500  18
SMITHERS     P.G.     36   10     900   8    100   14    2150  16
WELLS GRAY   P.G.     ##   ##     ###  ##    100   16    4000  21
FT NLSN      F.N.     88   11    1150  17    100   15    1600  18
FT STJOHN    F.N.    100   12    1650  19    100   17    2900  21

*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            W   28   W   30
SMITHERS              SW  17   W   30

TODAY'S VENTING: GOOD




VENTING FOR WEDNESDAY: GOOD




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     55   15    1150   5     75   17    1400   8
FRASER VLY   QUIL     51   14    1000   5     75   17    1350   8
SRN VRISL    QUIL     41   14     950   4     69   18    1450   6
CNTRL VRISL  QUIL     42   14     950   4     66   17    1350   6
NRN VRISL    HRDY     36   12     450   7     85   15    1200  11
TERRACE      ANT      98   11     950  23    100   14    1650  21
STEWART      ANT      58   11     450  14    100   14    1150  19

*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    SW  30   W   50   W   67
PORT HARDY   SW  30   W   37   W   52
SANDSPIT     W   17   W   22   W   33

TODAY'S VENTING: GOOD




VENTING FOR WEDNESDAY: GOOD




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


END/
$$$$^^