FPCN39 CWLW 061432
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 FRIDAY 6 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    6     200   2     39    8     200   2
KAMLOOPS     KEL       9    6     350   2     56    8    1600   2
OKANAGAN     KEL       9    6     350   2     56    8    1600   2
CASTLEGAR    SPOK     28    6     850   6     61    8    1300   8
CRANBROOK    SPOK      9    3     950  10     62    6    1650  10
REVELSTOKE   KEL       9    4     450   2     32    7     600   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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   SE  13   SE  19
CRANBROOK             VR   5   SE  15

TODAY'S VENTING: FAIR TO GOOD.

VENTING FOR SATURDAY:  FAIR.




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.     15    4    1500  13     83    6    1850  13
PR. GEORGE   P.G.      9    2     700   2     51    5    1250   9
SMITHERS     P.G.      9    3     550   2     42    5    1000   8
WELLS GRAY   P.G.     10    3    1000  13     85    6    1950  13
FT NLSN      F.N.      9    0     400   3      9    0     400   3
FT STJOHN    F.N.     21    0     850   8     21    0     850   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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            E   15   VR   5
SMITHERS              E   19   E    5

TODAY'S VENTING: POOR IN THE PEACE. FAIR TO GOOD CENTRAL INTERIOR.


VENTING FOR SATURDAY: POOR




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     10    8     100  25    100   12    1450  15
FRASER VLY   QUIL     18    7     150   8    100   11    1000  15
SRN VRISL    QUIL     21    8     200   7    100   12    1300  15
CNTRL VRISL  QUIL     21    8     200   7     88   11     750  15
NRN VRISL    HRDY      9    6       0   9     85   10     700  15
TERRACE      ANT       9    4     200   7     89    5    1200  12
STEWART      ANT       9    4       0   3     89    5    1200  12

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    E   15   E   26   SE  24
PORT HARDY   NE   9   E   19   E   19
SANDSPIT     N    9   E   11   E    9

TODAY'S VENTING: GOOD.

VENTING FOR SATURDAY: GOOD.



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


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