FPCN39 CWLW 191332
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 19 JANUARY 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    2     200   0      9    4     550   0
KAMLOOPS     KEL      10    3     600   1     13    4     750   1
OKANAGAN     KEL       9    2     550   0     13    4     750   1
CASTLEGAR    SPOK      9    3     500   3     17    5     750   3
CRANBROOK    SPOK      9    0     950  16      9    2     950  16
REVELSTOKE   KEL       9    1     550   0      9    1     550   0

*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   SW  11   SW  20
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR.

VENTING FOR TUESDAY: GOOD.




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   8      9    2     950   8
PR. GEORGE   P.G.      9    0     700  11      9    0     700  11
SMITHERS     P.G.      9   -3     500   2      9   -3     500   2
WELLS GRAY   P.G.      9    0    1000   8      9    1    1000   8
FT NLSN      F.N.     49  -22     800  11     57  -21    1000  10
FT STJOHN    F.N.     44  -21    1250   8     48  -22    1200  10

*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            SE  19   S   19
SMITHERS              E   15   VR  19

TODAY'S VENTING: POOR EXCEPT FAIR TO GOOD IN THE NORTHEAST DUE TO
GUSTY WINDS.

VENTING FOR TUESDAY: POOR TO FAIR.




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     25    8     150  19     65    9    1000  10
FRASER VLY   QUIL      9    6      50  19     65    7    1000  10
SRN VRISL    QUIL     13    8     150   4     65   10    1000  10
CNTRL VRISL  QUIL     11    6      50   4     65    5    1000  10
NRN VRISL    HRDY      9    5       0   4     65    7    1000  10
TERRACE      ANT       9    1     200   6     65    0    1000  10
STEWART      ANT       9    1       0   3     65    0    1000  10

*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  30   S   39   S   41
PORT HARDY   SE  31   SE  39   SE  39
SANDSPIT     S    9   S   11   SE  15

TODAY'S VENTING: BECOMING GOOD THIS AFTERNOON DUE TO AN UNSTABLE
AIRMASS.

VENTING FOR TUESDAY: FAIR TO GOOD.




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


END/JDG