FPCN39 CWLW 151342
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 15 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       9    4     450   0     32    7     850   5
KAMLOOPS     KEL       9    4     550   0     37    7    1000   3
OKANAGAN     KEL       9    3     500   0     30    6    1000   3
CASTLEGAR    SPOK     11    4     600   2     40    6    1000   7
CRANBROOK    SPOK     13    1     950   2     48    5    1300   8
REVELSTOKE   KEL       9    1     450   0     21    4     750   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   15   W   28
CRANBROOK             VR   5   W   20

TODAY'S VENTING: FAIR TO POOR

VENTING FOR MONDAY: 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.      9    1     950   2     58    5    2000   8
PR. GEORGE   P.G.      9    1     700   2     46    4    1100   8
SMITHERS     P.G.      9    1     500   0     34    5     850   1
WELLS GRAY   P.G.     14    3    1150   5     80    6    2800  10
FT NLSN      F.N.     35  -10     800   2     30   -8    1000   7
FT STJOHN    F.N.     39   -3    1150   7     48    2    1300   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW   9   VR   5
SMITHERS              S   28   S    5

TODAY'S VENTING: FAIR TO GOOD.


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     26    8     450   7     56   10    1000  11
FRASER VLY   QUIL     24    8     450   5     54   11    1250  11
SRN VRISL    QUIL     26    8     350   9     54   11    1150  10
CNTRL VRISL  QUIL     12    6     100   6     31    7     450   6
NRN VRISL    HRDY     19    6     100  10     50   10     500  10
TERRACE      ANT       9    3     200   5     30    5     500  10
STEWART      ANT       9    4       0   2     23    5       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   17   S   22   SW  28
PORT HARDY   S   39   S   44   S   43
SANDSPIT     S   52   S   54   S   56

TODAY'S VENTING: FAIR TO GOOD


VENTING FOR MONDAY: FAIR




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


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