FPCN39 CWLW 081431
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 SUNDAY 8 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   0     39    8     800   6
KAMLOOPS     KEL       9    5     500   0     60    7    1150   8
OKANAGAN     KEL       9    5     500   0     60    7    1150   8
CASTLEGAR    SPOK     27    2     750   8     60    7    1300  11
CRANBROOK    SPOK     10   -1     950   5     40    3    1350  10
REVELSTOKE   KEL       9    3     450   0     44    6     950   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   NW  15   NW  24
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: FAIR TO GOOD THIS AFTERNOON.

VENTING FOR MONDAY: 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.     10    0     950  16     50    3    1450  10
PR. GEORGE   P.G.      9   -1     700   2     32    2    1100   6
SMITHERS     P.G.     14    1     750   2     24    2     850   5
WELLS GRAY   P.G.     10    0    1000  16     50    3    1500  10
FT NLSN      F.N.     10   -2     400  21     10   -2     400  21
FT STJOHN    F.N.     51   -3     950  19     73   -2    1250  17

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            N   13   VR   5
SMITHERS              E   11   VR   5

TODAY'S VENTING: POOR TO FAIR EXCEPT GOOD THIS AFTERNOON IN THE
BC PEACE.

VENTING FOR MONDAY: POOR TO FAIR




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     11    7     250   1     16    9     300   3
FRASER VLY   QUIL     10    6     200   1     18   10     350   3
SRN VRISL    QUIL     10    6     200   1     15   10     350   2
CNTRL VRISL  QUIL     10    6     200   1     15   10     350   2
NRN VRISL    HRDY      9    5       0  13     50    8     500  10
TERRACE      ANT       9    2     200   6      9    4     200   6
STEWART      ANT       9    3       0   6      9    4       0   6

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   15   NW  15   NW  17
PORT HARDY   NW  15   NW  20   W   19
SANDSPIT     NW  19   N   20   N   24

TODAY'S VENTING: GENERALLY POOR.

VENTING FOR MONDAY: FAIR




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


END/MWSO