FPCN39 CWLW 141403
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 SATURDAY 14 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      19    3     500   3     35    7     850   5
KAMLOOPS     KEL      14    3     500   3     34    7     850   6
OKANAGAN     KEL      14    3     500   3     34    7     650   5
CASTLEGAR    SPOK     13    4     650   5     33    6     850   6
CRANBROOK    SPOK      9    0     950  20     22    4    1050   6
REVELSTOKE   KEL      11    2     500   3     21    3     750   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   S   20   S   48
CRANBROOK             S   13   S   31

TODAY'S VENTING: FAIR TO POOR

VENTING FOR SUNDAY: POOR


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.     26    1     950  12     34    4    1150  10
PR. GEORGE   P.G.     11    2     700   5     30    5     900   8
SMITHERS     P.G.      9    0     500   5     26    3     700   5
WELLS GRAY   P.G.      9    0    1000  10     48    4    1400  10
FT NLSN      F.N.      9   -9     400   4     20   -6     500   5
FT STJOHN    F.N.     17    3     700  10     36    5     750   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SE  30   S   37
SMITHERS              SE  35   SE  37

TODAY'S VENTING: FAIR TO POOR


VENTING FOR SUNDAY: FAIR TO POOR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     10    9     100  12     65   12    1450  15
FRASER VLY   QUIL     10    7      50   8     50   10     800  10
SRN VRISL    QUIL     21   10     350  12     64   12    1300  15
CNTRL VRISL  QUIL      9    7      50   9     45    8     500   9
NRN VRISL    HRDY     11    8      50  20     60   10     850  20
TERRACE      ANT       9    3     200  10     34    5     600  10
STEWART      ANT       9    6     100   8     27    5     300   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   28   S   33   SW  30
PORT HARDY   S   33   S   39   S   39
SANDSPIT     S   33   S   39   S   41

TODAY'S VENTING: FAIR TO GOOD.

VENTING FOR SUNDAY: FAIR.

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


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