FPCN39 CWLW 111400
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 FRIDAY 11 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      26   16    1200   2     85   25    3200   4

KAMLOOPS     KEL      60   17    2400   3     85   26    3350   4

OKANAGAN     KEL      32   15    1500   2     85   24    3350   4

CASTLEGAR    SPOK     63   15    1400   8    100   23    3500   8

CRANBROOK    SPOK     25    9    1500   5     90   19    4000  10

REVELSTOKE   KEL      29   14    1500   2     85   21    3450   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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   VR   5
CRANBROOK             VR   5   W    9

TODAY'S VENTING: RISING TO GOOD OVER ALL AREAS.

VENTING FOR SATURDAY: 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.     10   12     950   8    100   20    3950  12

PR. GEORGE   P.G.     45   15    1500   5    100   20    3700  13

SMITHERS     P.G.     38   14     950   7    100   22    3500  13

WELLS GRAY   P.G.     52   10    1500  13    100   20    4000  16

FT NLSN      F.N.      9   12     600   0     66   18    1950   5

FT STJOHN    F.N.     50   13    1750   5     97   18    2600   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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            VR   5   SE   9
SMITHERS              SE  15   SE   9

TODAY'S VENTING: INCREASING TO GOOD OVER ALL AREAS.

VENTING FOR SATURDAY: GOOD

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     20   14     100  10     40   19     600  11

FRASER VLY   QUIL     20   14     400  10     40   20     800  11

SRN VRISL    QUIL     24   13     250   7     69   19     850  10

CNTRL VRISL  QUIL     26   14     300   7     78   20    1050  10

NRN VRISL    HRDY     25   12     300   6     53   16     600   9

TERRACE      ANT      73   13     950   8    100   20    1750  16

STEWART      ANT      16   12     300   3     95   20    1450  11


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

FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SE  19   SE  26   S   30
PORT HARDY   SE  37   SE  52   SE  63
SANDSPIT     SE  54   SE  65   SE  72

TODAY'S VENTING: BECOMING GOOD OVER THE NORTH COAST AND MOST OF
VANCOUVER ISLAND. FAIR OVER THE REMAINDER OF THE COAST AND
NORTHERN VANCOUVER ISLAND.

VENTING FOR SATURDAY: GOOD

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


END/
$$$$^^