FPCN39 CWLW 051400
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 SATURDAY 5 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      59   16     500  20     89   20     850  20
KAMLOOPS     KEL      28   18     750   5     82   20    1500  10
OKANAGAN     KEL      21   17     600   5     82   20    1500  10
CASTLEGAR    SPOK     59   14     950  14     81   18    1300  14
CRANBROOK    SPOK     41   13    1200  14     84   16    1800  14
REVELSTOKE   KEL      10   14     500   5     23   16     600   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W   13   W   26   W   41
CRANBROOK             SW  19   SW  46

TODAY'S VENTING: GOOD LOCALLY POOR IN THE REVELSTOKE AREA

VENTING FOR SUNDAY: 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.     72   11    1750  11    100   15    3950  19
PR. GEORGE   P.G.     14   10     750  10     64   13    1200  14
SMITHERS     P.G.      9    9     500   4     64   13    1200  14
WELLS GRAY   P.G.     72   11    1750  11    100   15    4000  19
FT NLSN      F.N.     66   10     900  15     90   12    1200  18
FT STJOHN    F.N.     87   10    1300  22    100   13    1500  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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   17   W   20
SMITHERS              SW  17   SW  20

TODAY'S VENTING: GOOD

VENTING FOR SUNDAY: FAIR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL    100   13    1150  17    100   15    1650  15
FRASER VLY   QUIL     40   12     700  10    100   14    1700  17
SRN VRISL    QUIL    100   14    1200  16    100   16    1650  14
CNTRL VRISL  QUIL     74   11     700  14    100   15    1400  15
NRN VRISL    HRDY     79    9     800  14    100   12    1500  16
TERRACE      ANT     100    9    1400  35    100   13    2250  34
STEWART      ANT     100    9     950  32    100   13    1950  33

*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    SW  31   W   31   W   26
PORT HARDY   SW  31   SW  37   SW  35
SANDSPIT     SW  28   SW  22   W   19

TODAY'S VENTING:  GOOD

VENTING FOR SUNDAY: FAIR

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


END/RET
$$$$^^