FPCN39 CWLW 091408
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 9 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      21    7     500   4     100   9    1900  25
KAMLOOPS     KEL      17    7     550   4     55    8    1100  10
OKANAGAN     KEL       9    4     350   4     54    8    1100   9
CASTLEGAR    SPOK     53    5    1000  11     59    6    1100  11
CRANBROOK    SPOK     34    2    1100  18     95    6    1850  17
REVELSTOKE   KEL       9    2     450   4      9    3     450   4

*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   W   11   SW  15
CRANBROOK             W    9   W   30

TODAY'S VENTING: FAIR TO GOOD.

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.     10    3     950  22     81    5    1450  22
PR. GEORGE   P.G.     17   -1     950   4     21    2    1050   4
SMITHERS     P.G.     12    0     900   1     19    2     950   2
WELLS GRAY   P.G.      9    1    1000  22     63    4    1350  22
FT NLSN      F.N.     21  -15     600   6     24  -14     650   6
FT STJOHN    F.N.     25   -9    1150   4     37   -6    1200   6

*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            SW  26   SW  33
SMITHERS              SW  37   SW  33

TODAY'S VENTING: GENERALLY 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     75    9    1350   8     96   11    2000   8
FRASER VLY   QUIL     73    9    1250   8    100   12    2200   9
SRN VRISL    QUIL     29    8     450   5     96   12    2100   8
CNTRL VRISL  QUIL     12    5     100   4     96    9    2100   8
NRN VRISL    HRDY     23    6     100  18    100    9    1500  28
TERRACE      ANT      10    4     200  29    100    5     950  28
STEWART      ANT       9    4       0   9     17    5     100   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   15   S   15   VR   5
PORT HARDY   S   52   S   61   S   48
SANDSPIT     S   61   S   74   S   80

TODAY'S VENTING: GENERALLY GOOD.

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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