FPCN39 CWLW 091415
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 9 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      10    4     500   2     70    8     800  10
KAMLOOPS     SPOK      9    3     350   6     60    7     900  10
OKANAGAN     SPOK      9    3     350   4     40    7     900   8
CASTLEGAR    SPOK     20    3     750   4     40    6     950   8
CRANBROOK    SPOK     10    0     950   3     50    4    1650   8
REVELSTOKE   SPOK      9    1     450   4     23    5     800   4

*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   SW   9
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR THIS MORNING RISING TO FAIR TO GOOD THIS
AFTERNOON. EXCEPT REMAINING POOR AT REVELSTOKE.

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.     25    1    1500   5     70    5    2400  13
PR. GEORGE   P.G.     10    1     700   6     80    4    1600  12
SMITHERS     P.G.      9    1     500   4     31    3     900   7
WELLS GRAY   P.G.     20   -3    2000   6    100    5    4000  15
FT NLSN      F.N.     23  -11     850   3     28   -4    1050   3
FT STJOHN    F.N.     19   -8    1050   3     21   -4    1100   3

*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            S   13   SW  30
SMITHERS              S   19   S   30

TODAY'S VENTING: POOR THIS MORNING RISING TO GOOD THIS AFTERNOON.
EXCEPT REMAINING POOR AT SMITHERS AND OVER NORTHEASTERN BC.

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     50    7    1650   8    100    9    2050  20
FRASER VLY   QUIL     68    7    1650   4    100   11    2700  15
SRN VRISL    QUIL     72    7    1450   5    100   10    2150  18
CNTRL VRISL  QUIL     20    5     400   5    100   10    2150  19
NRN VRISL    HRDY     10    3      50   2     79    7     850  13
TERRACE      ANT      22    1     700   3     50    4    1100   5
STEWART      ANT      16   -2     400   4     27    4     700   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
VANCOUVER    SE  22   S   31   S   39
PORT HARDY   SE  20   SE  30   SE  28
SANDSPIT     S   15   S   30   S   35

TODAY'S VENTING: POOR TO FAIR THIS MORNING RISING TO FAIR TO GOOD
THIS AFTERNOON. REMAINING POOR AT STEWART.

VENTING FOR WEDNESDAY: POOR

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


END/