FPCN39 CWLW 081404
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 SUNDAY 8 FEBRUARY 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      15    4     450   2     17    6     600   2
KAMLOOPS     KEL      20    4     550   5     36    5     650  10
OKANAGAN     KEL      13    4     550   2     21    6     700   4
CASTLEGAR    SPOK      9    4     500   2     14    5     750   2
CRANBROOK    SPOK      9    1     950  13     10    3     950  13
REVELSTOKE   KEL      10    2     500   2     15    4     650   3

*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    S    9   S   22   SW  46
CRANBROOK             SW   9   SW  28

TODAY'S VENTING: Generally poor.

VENTING FOR MONDAY: Fair to 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.     24    2    1050  15     30    5    1100  15
PR. GEORGE   P.G.     28   -4     900  10     32   -1     950  10
SMITHERS     P.G.     28    0     950   5     28    0     950   5
WELLS GRAY   P.G.      9    0    1000  15      9    2    1000  15
FT NLSN      F.N.      9  -17     400  10     22  -14     500  10
FT STJOHN    F.N.     24  -10     850  10     30   -8     900  13

*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            SE  30   SE  37
SMITHERS              SE  31   SE  37

TODAY'S VENTING: Poor.

VENTING FOR MONDAY: Fair.




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     39   11     300  16     90   14    1000  17
FRASER VLY   QUIL     33   10     200  16     90   14    1000  16
SRN VRISL    QUIL     10    8     100   1     90   12    1000  20
CNTRL VRISL  QUIL     10    8     100   1     50   10     500  12
NRN VRISL    HRDY      9    8       0  21     66   10     400  21
TERRACE      ANT      40    5     400  20     40    6     400  20
STEWART      ANT       9    6       0   8      9    6       0   8

*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    S   44   S   52   S   48
PORT HARDY   SE  11   S   15   S   17
SANDSPIT     VR   5   S   20   S   26

TODAY'S VENTING: Good this afternoon in the south. Poor to fair in
the north.


VENTING FOR MONDAY: Fair to good.




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


END/JDG