FPCN39 CWLW 151432
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 15 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    100    9    1500  25
KAMLOOPS     KEL       9    5     350   2     90    7    1500  10
OKANAGAN     KEL      13    7     550   2    100   10    1500  15
CASTLEGAR    SPOK      9    6     500   5     80    8    1450  10
CRANBROOK    SPOK      9    4     950   2      9    6     950   5
REVELSTOKE   KEL       9    2     450   2     10    5     500   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SW  15   W   39   W   87
CRANBROOK             W   24   W   70

TODAY'S VENTING: POOR EXCEPT BECOMING GOOD THIS AFTERNOON IN THE
SOUTHWEST.

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.     48    2    1450   9     50    4    1450  10
PR. GEORGE   P.G.      9    0     700   0     30    0     970  10
SMITHERS     P.G.      9   -4     500   0     20   -1    1000   5
WELLS GRAY   P.G.     41    1    1400   9     50    4    1500  10
FT NLSN      F.N.     20  -15     650   3     20  -15     800   5
FT STJOHN    F.N.      9  -13     750   4     50  -10    1150  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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            VR   5   SW  22
SMITHERS              E   15   SW  22

TODAY'S VENTING: POOR TO FAIR.

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   10     100  40    100   11    2000  20
FRASER VLY   QUIL     11   10      50  40    100   11    2000  20
SRN VRISL    QUIL      9   11       0  21    100   12    2000  20
CNTRL VRISL  QUIL      9   10      50  21    100   11    2000  20
NRN VRISL    HRDY     10    9      50  25    100   10    2000  20
TERRACE      ANT       9   -2     200  10     70    2     800  15
STEWART      ANT      26    5     250   8     70    2     700  15

*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    SW  41   SW  57   W   67
PORT HARDY   SW  50   SW  61   SW  65
SANDSPIT     E   28   E   24   SE  24

TODAY'S VENTING: GOOD.

VENTING FOR MONDAY: FAIR TO GOOD.

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

END/JDG