FPCN39 CWLW 081400
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 8 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      29   12     700   4     84   18    2950  10
KAMLOOPS     KEL      58   13    1650   5     86   18    3350   6
OKANAGAN     KEL      46   12    1250   5     86   17    3350   4
CASTLEGAR    SPOK     20    9     750   4     87   16    3500   4
CRANBROOK    SPOK      9    8     950   5     88   14    3950   4
REVELSTOKE   KEL      30   10     900   5     78   15    2800   4

*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    9   W   17   W   22
CRANBROOK             VR   5   W   19

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.     80    7    2000  10    100   13    3950  10
PR. GEORGE   P.G.     81    9    1850   9    100   12    2750   9
SMITHERS     P.G.     67   10    1700   7    100   14    2850   8
WELLS GRAY   P.G.     50    6    1900   5    100   13    4000  10
FT NLSN      F.N.     27    9     750   6    100   15    2500  14
FT STJOHN    F.N.      9    6     700  10     71   10    1200  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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            N   19   N   39
SMITHERS              NW  20   N   39

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     78   12    1250   9    100   15    3100   9
FRASER VLY   QUIL     77   12    1200   9    100   15    3050   9
SRN VRISL    QUIL     50   12    1100   5     99   16    3000   6
CNTRL VRISL  QUIL     50   12    1150   5     99   16    3050   6
NRN VRISL    HRDY     23   10     550   3     58   13    1300   5
TERRACE      ANT      14   11     700   1     25   15    1200   2
STEWART      ANT      15   12     550   1     22   15     950   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   20   W   20   W   19
PORT HARDY   W   11   N   17   N   33
SANDSPIT     NW  30   NW  39   NW  31

TODAY'S VENTING: GOOD EXCEPT POOR ON THE NORTH COAST.


VENTING FOR WEDNESDAY: GOOD




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


END/
$$$$^^