FPCN39 CWLW 071435
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 SATURDAY 7 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      15    7     450   2     16    8     500   2
KAMLOOPS     KEL      12    6     500   2     21    8     850   2
OKANAGAN     KEL       9    5     350   2     21    8     850   2
CASTLEGAR    SPOK      9    4     500   2     29    7    1000   4
CRANBROOK    SPOK      9    0     950   9      9    4     950   9
REVELSTOKE   KEL       9    3     450   2     18    7     850   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   SE  13   SE  26
CRANBROOK             VR   5   VR   5

TODAY'S VENTING: POOR

VENTING FOR SUNDAY: 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.     24    2    1150   7     47    4    1550   8
PR. GEORGE   P.G.      9    1     700   0     26    4    1100   5
SMITHERS     P.G.      9    2     550   0     18    4     850   3
WELLS GRAY   P.G.     27    2    1300   7     52    4    1700   8
FT NLSN      F.N.     39    0     700  10     43    1     750   5
FT STJOHN    F.N.      9   -2     700  10     39    0    1050   5

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

FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            NW   9   NW  15
SMITHERS              VR   5   VR  15

TODAY'S VENTING: FAIR TO POOR

VENTING FOR SUNDAY: POOR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     16    7     250   5     49   11     850   7
FRASER VLY   QUIL     15    6     200   5     48   11     700   7
SRN VRISL    QUIL     17    7     200   4     48   11     600   8
CNTRL VRISL  QUIL     16    7     200   4     49   11     650   8
NRN VRISL    HRDY      9    4       0   8     45    9     500   9
TERRACE      ANT       9    3     200   4      9    5     200   4
STEWART      ANT       9    2       0   6     11    5      50   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    E   19   E   30   E   30
PORT HARDY   NE  13   E   20   E   28
SANDSPIT     N   22   N   20   N   19

TODAY'S VENTING: FAIR TO POOR


VENTING FOR SUNDAY: POOR




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


END/LM