FPCN39 CWLW 011522
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 1 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      11    4     495   2     58    9    1350   4
KAMLOOPS     KEL      12    5     540   1     63   10    1825   3
OKANAGAN     KEL      11    3     470   2     65   10    1800   3
CASTLEGAR    SPOK     12    5     930   4     49    8    1900   4
CRANBROOK    SPOK     10    3     950   5     21    7     650   5
REVELSTOKE   KEL      11    6     570   4     23    8     600   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    SSW 3    SW  3    SW 17
CRANBROOK             SW 10     W 15

TODAY'S VENTING: GOOD IN THE OKANAGAN. FAIR IN THE KOOTENAYS.


VENTING FOR MONDAY: GOOD.


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.     41  -1     1570   3     92    8    2550   8
PR. GEORGE   P.G.     19    0    1050   3     45    6    1400   5
SMITHERS     P.G.      9    4     550   2     35    7    1150   4
WELLS GRAY   P.G.     43    2    1600   5     93    7    2600  10
FT NLSN      F.N.      9   -6     450   8     43   -2     650   9
FT STJOHN    F.N.      9   -2     700   8     68    1    1500  11


*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            SE 18    SW 25
SMITHERS              S  15    S  20

TODAY'S VENTING: GOOD CARIBOO AND FORT ST JOHN .FAIR ELSEWHERE.

VENTING FOR MONDAY: FAIR


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     26    9     200   5     46   12     400   8

FRASER VLY   QUIL     17    8     150   3     36   11     300   8

SRN VRISL    QUIL     23    8     200   4     44   12     400   8

CNTRL VRISL  QUIL     17    8     150   4     38   12     300   9

NRN VRISL    HRDY     16    8     150  15     48   12     350  15

TERRACE      ANT      17    6     150   5     35   10     300   8

STEWART      ANT      12    6     150   5     33    9     300   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER             S 15     S 15
PORT HARDY            S 30     SE 20
SANDSPIT              E 30      E 20

TODAY'S VENTING: FAIR


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