FPCN39 CWLW 171400
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 17 JULY 1999 FOR TODAY.

SOUTHERN INTERIOR

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
FRSR CANYN   KEL      9   17     200   2      54   23    1350   5
KAMLOOPS     KEL      9   17     400   5      72   23    2300   5
OKANAGAN     KEL      9   19     400   5      71   23    2250   5
CASTLEGAR    SPOK     9   17     500   8      70   24    1450   9
CRANBROOK    SPOK     9   15    1000   8      88   22    3950   4
REVELSTOKE   KEL      9   15     500   4      69   22    2250   5

*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   NE  13   NE  19
CRANBROOK             VR   5   S   19

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: 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.      9   10    1000   2    100   21    3950  10
PR. GEORGE   P.G.      9   10     700   2    100   21    2600  10
SMITHERS     P.G.      9   10     600   1     99   23    2650   8
WELLS GRAY   P.G.      9   10    1000   1    100   21    4000  10
FT NLSN      F.N.      9   10     400   1     50   25    2300   3
FT STJOHN    F.N.      9   10     700   1      9   19     700   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            N   13   N   15
SMITHERS              W   11   NW  15

TODAY'S VENTING: GENERALLY GOOD.

VENTING FOR SUNDAY: GOOD.


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     9   17     100  14      55   19    1150   5
FRASER VLY   QUIL     9   17     100   5      96   23    1900   9
SRN VRISL    QUIL     9   17     100   5      68   22    1450   6
CNTRL VRISL  QUIL     9   17     100   5      86   23    1750   7
NRN VRISL    QUIL     9   15     100   2      57   20    1200   5
TERRACE      ANT      9   15     200   4     100   28    2500  11
STEWART      ANT      9   15     100   2     100   28    1850  10

*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    W   19   NW  17   N   17
PORT HARDY   NW  19   N   19   N   24
SANDSPIT     N   37   N   22   N   19

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: GOOD.

VENTILATION GUIDELINES:
          0-33.....POOR
          34-54.....FAIR
          55-100.....GOOD.

VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.


END/DSL
$$$$^^