FPCN39 CWLW 021340
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 2 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    1     200   2     24    3     600   2
KAMLOOPS     KEL      16    2     700   5     36    3     900   8
OKANAGAN     KEL      14    1     600   2     26    3     800   2
CASTLEGAR    SPOK      9    1     500   2     26    3     850   7
CRANBROOK    SPOK      9   -4    1000   2     23    1    1200   4
REVELSTOKE   KEL      12    0     600   2     14    1     700   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   S   15
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR

VENTING FOR TUESDAY: 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.     13    3    1000  10     35    5    1250  11
PR. GEORGE   P.G.     16    0     850   8     31    2     900  10
SMITHERS     P.G.     16   -2     650   6     22    0     750   5
WELLS GRAY   P.G.     17    0    1000  12     36    5    1200  14
FT NLSN      F.N.     13  -17     450   5     17  -12     550   5
FT STJOHN    F.N.      9  -11     700   8     17   -6     700   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            S   20   SW  20
SMITHERS              S   33   S   20

TODAY'S VENTING: POOR.

VENTING FOR TUESDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     18    8     700  10     52   11    1250  15
FRASER VLY   QUIL     11    8      50  10     46   11    1200  12
SRN VRISL    QUIL     22    8     200  12     56   12    1400  15
CNTRL VRISL  QUIL      9    7      50  12     37    7     600  12
NRN VRISL    HRDY      9    8     100  15     56   10     850  18
TERRACE      ANT      18    3     200  12     36    5     500  12
STEWART      ANT       9    6      50   7     30    5     400   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
VANCOUVER    SE  26   SE  30   S   30
PORT HARDY   SE  30   S   35   S   33
SANDSPIT     S   57   S   63   S   67

TODAY'S VENTING: FAIR


VENTING FOR TUESDAY: FAIR




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


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