FPCN39 CWLW 161352
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 16 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    3     200   0     25    7     750   2
KAMLOOPS     KEL       9    3     500   0     43    7    1100   5
OKANAGAN     KEL       9    4     550   0     37    7    1100   2
CASTLEGAR    SPOK     17    4     750   3     27    6     950   4
CRANBROOK    SPOK      9    0     950   6     50    5    1850   5
REVELSTOKE   KEL       9    2     500   0     19    4     700   1

*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   SE  17   SE  26
CRANBROOK             VR   5   SE  11

TODAY'S VENTING: FAIR

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.     14    1     950  10     56    5    1650  10
PR. GEORGE   P.G.     20    1     850   4     38    4    1150   8
SMITHERS     P.G.     13   -1     600   4     29    4     900   5
WELLS GRAY   P.G.     10    0    1000  10     62    5    2300  10
FT NLSN      F.N.     21   -9     500   2     26   -7     850   2
FT STJOHN    F.N.     17   -5     800   2     30   -2    1050   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
PR. GEORGE            SE  22   S   19
SMITHERS              SE  30   S   19

TODAY'S VENTING: FAIR

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     17    6     300  10     68   12    1100  10
FRASER VLY   QUIL      9    7      50   8     62   12    1550   8
SRN VRISL    QUIL     18    9     400  10     57   10    1000  10
CNTRL VRISL  QUIL     15    7     150   6     40    9     750   6
NRN VRISL    HRDY     46    9     600  15     72   10    1000  15
TERRACE      ANT      10    3     200   3     36    5     600  12
STEWART      ANT       9    6       0   6     33    5     400   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
VANCOUVER    SE  31   SE  37   SE  39
PORT HARDY   SE  63   SE  76   S   72
SANDSPIT     SE  85   SE  85   SE  70

TODAY'S VENTING: FAIR TO GOOD


VENTING FOR TUESDAY: FAIR TO POOR


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


END/