FPCN39 CWLW 011344
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 SUNDAY 1 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    0     500   0     12    5     700   1
KAMLOOPS     KEL      17    1     600   7     35    4     800   7
OKANAGAN     KEL       9    0     550   0     15    4     800   1
CASTLEGAR    SPOK     28    3     850   6     31    4     900   6
CRANBROOK    SPOK      9    0     950   7     17    3     950   7
REVELSTOKE   KEL       9    0     600   0     16    2     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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SE  11   SE  30   S   59
CRANBROOK             S   11   S   31

TODAY'S VENTING: POOR

VENTING FOR MONDAY: 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.     12   -1    1000   7     34    5    1400   7
PR. GEORGE   P.G.     20   -1     800  11     29    3     900   8
SMITHERS     P.G.     19    0     750   4     21    3     850   4
WELLS GRAY   P.G.      9   -1    1000  19     36    4    1200   9
FT NLSN      F.N.     12  -11     600   4     22   -6     650   5
FT STJOHN    F.N.      9   -5     700   6     14   -1     750   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SE  44   SE  50
SMITHERS              SE  50   SE  50

TODAY'S VENTING: POOR

VENTING FOR MONDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9    8     100  10      9   29     300  12
FRASER VLY   QUIL      9    9      50   8     38   13     350  10
SRN VRISL    QUIL      9    6      50   5     27   11     250   8
CNTRL VRISL  QUIL      9    5      50   5      9    9     150   5
NRN VRISL    HRDY     10    9     100  15     54   11     400  25
TERRACE      ANT      19    6     200  12     37    9     400  15
STEWART      ANT       9    8      50   8     27    9     300  14

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SE  50   SE  61   SE  57
PORT HARDY   SE  70   SE  82   S   78
SANDSPIT     SE  98   SE  94   SE  78

TODAY'S VENTING: FAIR TO POOR.

VENTING FOR MONDAY: FAIR

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


END/MWSO