FPCN39 CWLW 081426
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 MARCH 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      16    2     500   2     17    4     600   2
KAMLOOPS     KEL      14    2     600   2     50    5    1100   8
OKANAGAN     KEL      13    1     500   2     23    5    1050   2
CASTLEGAR    SPOK     20    0     750   4     22    2     850   4
CRANBROOK    SPOK      9   -1     950   9    100    4    2700  10
REVELSTOKE   KEL      10   -1     500   2     15    3     750   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
PENTICTON    SE  11   S   24   S   52
CRANBROOK             S   13   S   37

TODAY'S VENTING: POOR TO FAIR EXCEPT GOOD IN THE EAST.

VENTING FOR TUESDAY: FAIR TO 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.     60    0    1550  15     60    2    1500  15
PR. GEORGE   P.G.      9   -3     700  10     60    2    1500  15
SMITHERS     P.G.     13    0     800   1     14    1     900   1
WELLS GRAY   P.G.      9   03    1100   5     60    2    1600  15
FT NLSN      F.N.     24  -15     700   5     45  -13    1050   8
FT STJOHN    F.N.     45  -10    1300   8     45   -7    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   39   S   46
SMITHERS              S   20   SW  46

TODAY'S VENTING: POOR TO FAIR.

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    6     750  40    100    9    1350  43
FRASER VLY   QUIL    100    6     650  40    100    9    1300  42
SRN VRISL    QUIL    100    7     900  35    100    8    1150  35
CNTRL VRISL  QUIL    100    8    1150  35    100    9    1300  37
NRN VRISL    HRDY    100    6     900  32    100    8    1300  34
TERRACE      ANT      10    0     200  20    100    2    1350  21
STEWART      ANT      10    0     200  10    100    2    1350  16


*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    S   44   S   59   S   57
PORT HARDY   SE  43   S   50   S   43
SANDSPIT     N   26   VR   5   VR   5

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.


END/MWSO