FPCN39 CWLW 231438
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 23 NOVEMBER 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    4     500   0     60    7     500  12
KAMLOOPS     KEL       9    2     500   0     65    6     550  15
OKANAGAN     KEL       9    2     500   0     40    6     550   9
CASTLEGAR    SPOK      9    3     500   6     29    6     850   6
CRANBROOK    SPOK      9    1     950  11     43    4    1300  11
REVELSTOKE   KEL       9    3     500   0      9    5     550   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    S   11   S   39   SW  93
CRANBROOK             SW  28   SW  76

TODAY'S VENTING: POOR THIS MORNING INCREASING TO FAIR EXCEPT GOOD IN
THE OKANAGAN AND AT KAMLOOPS THIS AFTERNOON. REMAINING POOR AT
REVELSTOKE.

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.     10   -1     950  18     71    2    1550  15
PR. GEORGE   P.G.      9   -2     700   1      9    2     700   1
SMITHERS     P.G.      9   -1     550   1     12    3     750   1
WELLS GRAY   P.G.     10   -2    1000  18     82    2    1850  14
FT NLSN      F.N.      9  -11     400   6     30  -10     750   6
FT STJOHN    F.N.     33   -3     950  11     37    0    1000  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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SE  50   S   82
SMITHERS              E   33   SE  82

TODAY'S VENTING: POOR INCREASING TO GOOD OVER ALL AREAS EXCEPT FAIR
IN NORTHEAST BC AND REMAINING POOR IN THE BULKLEY VALLEY.

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     10    7     100  18    100   11     900  23
FRASER VLY   QUIL     10    6      50  18     64   10     450  18
SRN VRISL    QUIL     29    7     300   8     86   11     700  19
CNTRL VRISL  QUIL     23    6     200   8     46    8     350  13
NRN VRISL    HRDY     10    5      50  11     40    7     150  15
TERRACE      ANT      10    1     200  18     10    3     200  18
STEWART      ANT       9    3       0  10      9    3       0  10

*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   85   S  113   S  128
PORT HARDY   E   31   SE  41   SE  41
SANDSPIT     N   26   N   20   NW   9

TODAY'S VENTING: POOR RISING TO FAIR TO GOOD THIS AFTERNOON. EXCEPT
REMAINING POOR IN THE NORTHWEST.

VENTING FOR TUESDAY: POOR

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


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