FPCN39 CWLW 031330
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 TUESDAY 3 MARCH 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    5     600   0
KAMLOOPS     KEL       9    3     600   0      9    4     650   0
OKANAGAN     KEL       9    2     500   0      9    3     600   0
CASTLEGAR    SPOK     14    3     800   5     30    4    1000   8
CRANBROOK    SPOK     10    0     950  18     10    1     950  18
REVELSTOKE   KEL       9    0     450   0      9    1     500   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   VR   5
CRANBROOK             VR   5   NW   9

TODAY'S VENTING: POOR.


VENTING FOR WEDNESDAY: 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.     33    0    1450   8     43    3    1550   8
PR. GEORGE   P.G.     33   -1    1350  10     52    2    1500   9
SMITHERS     P.G.     34    0    1250   5     48    2    1500   6
WELLS GRAY   P.G.     38    2    1450   8     40    5    1550   8
FT NLSN      F.N.     32   -7     950   5     38   -6    1100   5
FT STJOHN    F.N.     28   -6    1150   5     35   -4    1250   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            VR   5   S    9
SMITHERS              N   11   N    9

TODAY'S VENTING: FAIR.

VENTING FOR WEDNESDAY: POOR




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     62    6     700  11     82    8    1400   9
FRASER VLY   QUIL     34    5     300  11     88    9    1650   8
SRN VRISL    QUIL     22    4     250   6     83    9    1550   8
CNTRL VRISL  QUIL     24    5     300   6     76    8    1200   8
NRN VRISL    HRDY     18    5     100   9     91    8    1350  11
TERRACE      ANT      10    2     250  15     80    7    1150  12
STEWART      ANT      21    4     150   9     62    7     650  11

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   11   W   11   NW  11
PORT HARDY   NW  22   NW  24   NW  26
SANDSPIT     N   43   N   39   N   37

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: FAIR.




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


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