FPCN39 CWLW 071400
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 MONDAY 7 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      16   11     600   2    100   17    2850   7
KAMLOOPS     KEL      26   10     850   4    100   16    3350   7
OKANAGAN     KEL       9    9     600   0    100   16    3350   7
CASTLEGAR    SPOK     34    9     850   8    100   14    3500  12
CRANBROOK    SPOK    100    9    3950  13    100   14    3950  13
REVELSTOKE   KEL      65   11    1800   6    100   15    3450   7

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   11   W   13
CRANBROOK             SW  11   SW  26

TODAY'S VENTING: good.


VENTING FOR TUESDAY: 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    7    2000   5    100   11    2950  11
PR. GEORGE   P.G.     52    8    1150   5    100   11    2650  15
SMITHERS     P.G.     37    8     950   7     55   10    1300   6
WELLS GRAY   P.G.     30    3    1000   3    100   13    4000  20
FT NLSN      F.N.      9    6     400   2     89    8    1350   8
FT STJOHN    F.N.     31    4     850   7     53    7    1150   9

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  28   W   30
SMITHERS              NW  26   N   30

TODAY'S VENTING: Generally good by the afternoon. Fair
near Ft St John.


VENTING FOR TUESDAY: GOOD



COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL    100   12    1550  10    100   15    2350   7
FRASER VLY   QUIL     74   11    1200   5    100   14    2050   7
SRN VRISL    QUIL     78   10     900  12    100   14    1950   6
CNTRL VRISL  QUIL     86   11    1150  12    100   15    2200   5
NRN VRISL    HRDY     53   10     750   8     78   12    1300   8
TERRACE      ANT      10   11     250  10    100   15    1800  11
STEWART      ANT      14   12     550   1     69   15    1150   7

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   11   W   11   VR   5
PORT HARDY   NW  19   W   17   W   15
SANDSPIT     NW  24   N   33   N   37

TODAY'S VENTING: GOOD


VENTING FOR TUESDAY: GOOD

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


END/LM
$$$$^^