FPCN39 CWLW 231428
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 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      16    9     550   2     51   15    2100   4
KAMLOOPS     KEL      16    9     600   3     56   15    2600   3
OKANAGAN     KEL      13    7     500   2     47   13    2050   4
CASTLEGAR    SPOK     17    7     750   3     36   10     900   4
CRANBROOK    SPOK      9    4     950   6     32    8    1150   6
REVELSTOKE   KEL      10    5     500   2     32    7     950   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    VR   5   S   22   S   54
CRANBROOK             S   15   S   39

           INVERSION HT    BREAKTHRU TEMP
KELOWNA          700 M         10 C
SPOKANE          900 M         11 C

TODAY'S VENTING: FAIR TO GOOD..

VENTING FOR TUESDAY: GOOD

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: 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.     56    5    2100   1     84    9    2750   8
PR. GEORGE   P.G.     76    5    1700   3     86    9    2300   8
SMITHERS     P.G.     11    3     600   2     78    8    1950   6
WELLS GRAY   P.G.     87    5    2200   3     80   10    4000   8
FT NLSN      F.N.      9    2     400   5     49    8     900   5
FT STJOHN    F.N.      9    0     700   5     47    5     900   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900M     1800M    2700M
PR. GEORGE            VR   5   SE  11
SMITHERS              VR   5   SE  11

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE       N/A           N/A
FT. NELSON      800 M          8 C

TODAY'S VENTING: FAIR TO GOOD.

VENTING FOR TUESDAY: GOOD

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD.



COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  TMP  MXG HT  WND    VI  TMP  MXG HT  WND
                               (MASL)  (KT)            (MASL)  (KT)
VANCOUVER    QUIL      9    9     100   8     32   12     300  12
FRASER VLY   QUIL      9    9      50   8     30   12     300   8
SRN VRISL    QUIL     16   10     250   3     38   12     400  12
CNTRL VRISL  QUIL     14    9     200   3     34   11     400   6
NRN VRISL    HRDY     18    7     100   9     58   12     650  12
TERRACE      ANT      30    7     600   3     72   12    1850  14
STEWART      ANT      14    7      50   8     76   12    1300   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
VANCOUVER    SE  50   S   65   S   72
PORT HARDY   N   17   NE  11   E   11
SANDSPIT     VR   5   VR   5   VR   5

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE       600 M         13 C
PORT HARDY       400 M         12# C
ANNETTE          MSG           MSG

TODAY'S VENTING: FAIR SOUTH GOOD NORTH.

VENTING FOR TUESDAY: GOOD

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD.

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


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