FPCN39 CWLW 211433 CCA
CORRECTED SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR
INCLUDING THE NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE
OF ENVIRONMENT CANADA AT 7.33 AM PDT MONDAY 21 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      17   17     550   2     91   22    2000   2
KAMLOOPS     KEL      27   18    1300   2     78   22    2700   2
OKANAGAN     KEL      13   15     500   2     67   22    1900   2
CASTLEGAR    SPOK     20   17     800   4     91   23    2450   7
CRANBROOK    SPOK      9   16     950   7    100   23    3950  11
REVELSTOKE   KEL      10   12     500   2     60   16    1000   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SW   9   SW  24   W   46
CRANBROOK             SW  20   SW  54

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   13    2450  19    100   17    3950  25
PR. GEORGE   P.G.     34   13    1050   8    100   16    2550  17
SMITHERS     P.G.     13   11     750   2     78   15    1150   4
WELLS GRAY   P.G.     ##   ##     ###  ##    100   17    4000  25
FT NLSN      F.N.     54   16     800  13    100   20    2400  25
FT STJOHN    F.N.     10   14     700  28    100   18    2650  32

*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  20   W   30
SMITHERS              SW  19   SW  30

TODAY'S VENTING: GOOD

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     98   14    1150  15    100   17    1350  16
FRASER VLY   QUIL     96   14    1100  15    100   17    1300  16
SRN VRISL    QUIL     85   14    1000  13    100   18    1350  13
CNTRL VRISL  QUIL     98   15    1250  13    100   17    1300  13
NRN VRISL    HRDY     34   12     300  10     83   14     950  13
TERRACE      ANT      94   10     850  23    100   13    1550  25
STEWART      ANT      81   11     550  20    100   13    1150  22

*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    S   20   SW  31   SW  37
PORT HARDY   S   30   S   33   S   30
SANDSPIT     S   22   SW  22   SW  20

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/
$$$$^^