FPCN39 CWLW 011359
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 PST MONDAY 1 FEBRUARY 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      12    4     500   1     96    6    1800  20
KAMLOOPS     KEL      11    3     550   1     94    5    1600  12
OKANAGAN     KEL      10    2     500   1     93    5    1600  12
CASTLEGAR    SPOK     77    2     950  22     90    3    1150  22
CRANBROOK    SPOK    100   -1    1600  31    100    0    1850  27
REVELSTOKE   KEL       9    0     450  14     70    2    1050  16


*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  19   W   46   W   94
CRANBROOK             W   35   W   94

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   -2    3950  20    100    1    3950  20
PR. GEORGE   P.G.     10   -3     700  22    100   -1    2600  21
SMITHERS     P.G.      9   -4     500   5    100    2    3500  17
WELLS GRAY   P.G.    100   -2    3000  20    100    1    4000  20
FT NLSN      F.N.     24  -22     900   3     31  -20    1050   4
FT STJOHN    F.N.     30  -16    1050   7     48  -12    1250   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
PR. GEORGE            SW  30   W   78
SMITHERS              S   39   SW  78

TODAY'S VENTING: GOOD EXCEPT POOR TO FAIR IN THE NORTHEAST.


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      9    6     100  18    100    8    1100  25
FRASER VLY   QUIL      9    5     100  18     80    7    1050  18
SRN VRISL    QUIL     15    7     100  10    100    8     900  22
CNTRL VRISL  QUIL      9    4      50  10    100    8     950  23
NRN VRISL    HRDY     11    3     100   8     88    5     850  12
TERRACE      ANT       9   -3     200  12     89   -2    1300  12
STEWART      ANT      12   -2     200  10     85   -2    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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  59   SW  85   W   80
PORT HARDY   SW  76   SW  98   SW  93
SANDSPIT     SW  65   SW  70   W   82

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/GF