FPCN39 CWLW 031354
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 TUESDAY 3 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      26    3     600   8     50    5     850   8
KAMLOOPS     KEL      11    0     550   3     36    4     900   6
OKANAGAN     KEL      11   -2     500   1     30    3     800   5
CASTLEGAR    SPOK     11    0     600   2     30    2     800   5
CRANBROOK    SPOK     10   -3    1000   2     27    0    1100   4
REVELSTOKE   KEL      10   -1     550   1     26    2     800   5

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   S   15   S   39
CRANBROOK             SE  13   S   33

TODAY'S VENTING: FAIR

VENTING FOR WEDNESDAY: 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   3     32    4    1100   7
PR. GEORGE   P.G.     10   -4     700   5     18    1     900   5
SMITHERS     P.G.     11   -4     650   1     18    1     800   3
WELLS GRAY   P.G.      9    0    1000   6     45    4    1900   8
FT NLSN      F.N.      9  -10     400   2     27   -8     800   5
FT STJOHN    F.N.     12  -10     900   2     26   -7    1000   5

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            E   19   E   13
SMITHERS              E   33   E   13

TODAY'S VENTING: POOR

VENTING FOR WEDNESDAY: POOR




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     50    8     400  15     68   12     750  15
FRASER VLY   QUIL     51   10     550  10     56   10     550  10
SRN VRISL    QUIL     45    9     450  10     56   12     700  10
CNTRL VRISL  QUIL     16    7     200   8     47   10     600  10
NRN VRISL    HRDY      9    3     100   8     56   10     600  10
TERRACE      ANT      23    1     200  10     46    5     650  11
STEWART      ANT       9    3     100   2     36    5     500   9

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    E   28   SE  31   S   43
PORT HARDY   E   33   E   39   E   39
SANDSPIT     E   24   SE  30   SE  33

TODAY'S VENTING: FAIR

VENTING FOR WEDNESDAY: POOR


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


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