FPCN39 CWLW 091408
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 9 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     200   0     64    8    1900   3
KAMLOOPS     KEL       9    3     350   0     67    7    2250   7
OKANAGAN     KEL       9    4     500   0     67    7    2150   7
CASTLEGAR    SPOK     16    3     750   3     59    7    1600   6
CRANBROOK    SPOK      9   -2     950   9     57    3    1700   8
REVELSTOKE   KEL       9    2     450   0     41    6    1000   7

*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   W   19
CRANBROOK             VR   5   NW  17

TODAY'S VENTING: GOOD IN THE SOUTHWEST. FAIR IN THE COLUMBIA
MOUNTAINS AND KOOTENAYS.


VENTING FOR TUESDAY: 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.     44    0    1550   6     70    2    2150   6
PR. GEORGE   P.G.      9   -2     700   4     65    2    1550   9
SMITHERS     P.G.      9   -1     550   4     72    3    1450  10
WELLS GRAY   P.G.     44    0    1650   6     78    2    2250   8
FT NLSN      F.N.      9   -6     400  10     21   -4     500  10
FT STJOHN    F.N.      9   -5     700  11     75   -3    1450  13


*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   VR   5
SMITHERS              VR   5   VR   5

TODAY'S VENTING: GOOD EXCEPT POOR IN THE FORT NELSON AREA.


VENTING FOR TUESDAY: FAIR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     31    7     350   8     61    9     750  10
FRASER VLY   QUIL     30    7     350   8     60    9     750  10
SRN VRISL    QUIL      9    6     100   0     64   10     850   9
CNTRL VRISL  QUIL      9    5      50   0     54    7     600   2
NRN VRISL    HRDY     10    5     100   1     29    9    1000   2
TERRACE      ANT       9    1     200  12     70    6    1350  12
STEWART      ANT       9    2       0   4     41    6     500   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
VANCOUVER    SE  13   S   13   S   11
PORT HARDY   SE  20   S   20   SE  13
SANDSPIT     SE  24   SE  26   E   30

TODAY'S VENTING:  GENERALLY GOOD EXCEPT POOR OVER NORTHERN VANCOUVER
ISLAND AND PARTS OF THE NORTH COAST.


VENTING FOR TUESDAY: FAIR.



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


END/GF