FPCN39 CWLW 011402
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 1 DECEMBER 1997 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     350   3     36    6     500   3
KAMLOOPS     KEL       9    1     400   3     41    5     700   5
OKANAGAN     KEL       9    2     500   0     37    5     700   3
CASTLEGAR    SPOK     19    4     600   5     36    4     900   7
CRANBROOK    SPOK      9    0    1050   3     32    4    1450   3
REVELSTOKE   KEL       9    2     500   0     27    3     650   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   N    9
CRANBROOK             NW   9   NW  20

TODAY'S VENTING: FAIR TO POOR

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.      9    0    1050   5     48    4    1350  10
PR. GEORGE   P.G.     17    1     850   5     34    3     950  10
SMITHERS     P.G.     13    0     700   4     25    2     800   6
WELLS GRAY   P.G.     15    1    1000   6     52    4    1700  12
FT NLSN      F.N.      9  -13     400   8     18   -8     500   8
FT STJOHN    F.N.      9    2     700   8     46    5    1050  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
PR. GEORGE            SW  37   W   39
SMITHERS              SW  69   SW  39

TODAY'S VENTING: FAIR.

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     20    8     250   6     45   11     800   5
FRASER VLY   QUIL     20    8     250   6     43   11     750   5
SRN VRISL    QUIL     22    8     250   6     50   12    1000   5
CNTRL VRISL  QUIL     19    7     200   6     43    9     700   6
NRN VRISL    HRDY     24    8     400   6     47    9     650  15
TERRACE      ANT       9    3     200   4     24    5     400  15
STEWART      ANT       9    6     100   4     21    5     350  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    E   15   E   13   VR   5
PORT HARDY   S   54   S   46   SW  37
SANDSPIT     S   98   S   98   S  100

TODAY'S VENTING: FAIR

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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