FPCN39 CWLW 081344
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 8 FEBRUARY 1999 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    2     200   5     69    4    1200   5
KAMLOOPS     KEL       9    2     350   5     67    3    1000   5
OKANAGAN     KEL       9    1     350   5     56    4     900   5
CASTLEGAR    SPOK    100    2    1250  26    100    3    1400  10
CRANBROOK    SPOK    100    0    1650  31    100    2    2250  14
REVELSTOKE   KEL       9    1     450   5     50    2     750   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SE  11   S   24   SW  57
CRANBROOK             S   19   S   52

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: FAIR.

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.     72   -2    1300  24    100    1    2500  20
PR. GEORGE   P.G.     37   -2     950  11     72    0    1250  15
SMITHERS     P.G.      9   -6     500   0     70   -3     800   5
FT NLSN      F.N.     43  -17     750  11     48  -16     800  10
FT STJOHN    F.N.     74  -11    1350  14     74   -6    1200   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   S   33
SMITHERS              S   19   S   33

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: FAIR.

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL    100    5     700  37    100    5     700  37
FRASER VLY   QUIL    100    6     800  37    100    7    1150  38
SRN VRISL    QUIL    100    5     650  31    100    6     750  31
CNTRL VRISL  QUIL     86    4     500  27    100    6     750  31
NRN VRISL    HRDY     12    2     100   4     86    4     950  14
TERRACE      ANT       9   -1     200  13     49    0     600   8
STEWART      ANT      ##   ##     ###  ##     49    0     600   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  33   SW  50   SW  52
PORT HARDY   W   17   W   19   SW  22
SANDSPIT     SW  24   SW  26   SW  24

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: GOOD.

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


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