FPCN39 CWLW 141329
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 SUNDAY 14 JUNE 1998 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   16     550   2     80   25    2200   8
KAMLOOPS     KEL      13   14     550   2     80   24    2350   8
OKANAGAN     KEL      13   15     550   2     80   24    2350   8
CASTLEGAR    SPOK     23   15     800   5     80   24    2500  11
CRANBROOK    SPOK      9   13     950  14    100   19    2950  11
REVELSTOKE   KEL      11   14     550   2     50   21    1900   6

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W   11   W   24   W   31
CRANBROOK             W   13   W   33

           INVERSION HT    BREAKTHRU TEMP
KELOWNA          700 m         17 C
SPOKANE         1300 m         20 C

TODAY'S VENTING: GOOD EXCEPT FAIR IN THE COLUMBIA MOUNTAINS.

VENTING FOR MONDAY: POOR.

VENTING OUTLOOK TUESDAY THRU THURSDAY: IMPROVING TO
GOOD BY WEDNESDAY.

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   10     950  29     80   17    1500  21
PR. GEORGE   P.G.      9   12     700  23     60   19    1500  22
SMITHERS     P.G.      9   12     500   6     40   17    1000  22
WELLS GRAY   P.G.    100   13    1750  28     60   20    1500  21
FT NLSN      F.N.     32   11     650  10     80   18    1300   7
FT STJOHN    F.N.     36   10    1050   9     60   18    1300   6

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   24   W   33
SMITHERS              SW  31   W   33

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE       NONE
FT. NELSON       600 m         12 C

TODAY'S VENTING: FAIR TO GOOD.

VENTING FOR MONDAY: GOOD

VENTING OUTLOOK TUESDAY THRU THURSDAY: GOOD.

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     52   14     900   6     49   18    1250   7
FRASER VLY   QUIL     50   14     900   6     55   20    1400   7
SRN VRISL    QUIL     50   14     900   6     49   19    1300   7
CNTRL VRISL  QUIL     47   14     900   5     49   19    1300   7
NRN VRISL    HRDY     28   12     350   6     39   16     700   5
TERRACE      ANT      10   11     250  22     80   16    1400  19
STEWART      ANT      22   12     150  11     80   16    1100  18

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   24   W   48   W   69
PORT HARDY   SW  41   W   56   W   69
SANDSPIT     W   44   W   50   SW  56

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE      NONE
PORT HARDY      1700 m         23 C
ANNETTE         NONE

TODAY'S VENTING: FAIR.

VENTING FOR MONDAY: GOOD

VENTING OUTLOOK TUESDAY THRU THURSDAY: FAIR.

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


END//KJ