FPCN39 CWLW 301428
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 30 JANUARY 1999 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    5     200  10    100    6    1600   8
KAMLOOPS     KEL      24    8     500  10    100    8    1600   5
OKANAGAN     KEL      22    7     500  10    100    7    1600   5
CASTLEGAR    SPOK      9    6     500  18     30    6     800  12
CRANBROOK    SPOK     12    2     950  53     10    4     950  15
REVELSTOKE   KEL       9    2     450  10     20    4     700  10

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

FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    S   17   SW  44   SW 106
CRANBROOK             SW  31   SW  93

TODAY'S VENTING: GOOD IN THE WEST POOR EAST.

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.    100    1    2000  23    100    2    2100  12
PR. GEORGE   P.G.     64   -2    1150  16     60   -1    1300   8
SMITHERS     P.G.      9   -6     500   1      5   -4     500   3
FT NLSN      F.N.     37  -19     900   6     39  -18    1000   6
FT STJOHN    F.N.     43  -17    1300   6     35  -16    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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  37   SW  56
SMITHERS              SW  46   SW  56

TODAY'S VENTING: VARIABLE.

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     15    3     500  10    100    6    1500  10
FRASER VLY   QUIL     10    1     200   5    100    6    1500  10
SRN VRISL    QUIL     25    3     300  10    100    6    1500  10
CNTRL VRISL  QUIL     15    2     300   8    100    6    1500  10
NRN VRISL    HRDY     11    5      50   5     15    4     150   5
TERRACE      ANT      10   -2     200  19     88   -1    1550  19
STEWART      ANT      60    0    1000  12     90   -1    1500   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 FRIDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    S   54   S   83   SW  94
PORT HARDY   S   31   SW  46   SW  56
SANDSPIT     SW  31   SW  39   SW  44

TODAY'S VENTING: GOOD.

VENTING FOR SATURDAY: FAIR.

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


END/KJ