FPCN39 CWLW 141358
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 14 FEBRUARY 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      21    4     600   3     50    9    1500   4
KAMLOOPS     KEL      15    2     550   3     50    8    1500   5
OKANAGAN     KEL      14    1     500   3     50    7    1500   5
CASTLEGAR    SPOK      9    0     500   4     50    4    1550   4
CRANBROOK    SPOK      9   -1     950   4     50    2    1550   4
REVELSTOKE   KEL      12    1     550   3     50    3    1500   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
PENTICTON    VR   5   W   11   W   22
CRANBROOK             VR   5   NW  13

TODAY'S VENTING: FAIR.

VENTING FOR MONDAY: POOR TO 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.      9    0    1700   5     50    4    3950   5
PR. GEORGE   P.G.      9   -1     700   5     50    3    2150   5
SMITHERS     P.G.      9   -1     500   1     50    3    1050   5
WELLS GRAY   P.G.      9   -1     500   1     60    4    4000   5
FT NLSN      F.N.      9  -15     400   1     11   -9     600   5
FT STJOHN    F.N.      9    1     700  10     90    4     950  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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   17   W   26
SMITHERS              SW  22   SW  26

TODAY'S VENTING: POOR TO GOOD.

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     17    4     200   6     51    8    1150   6
FRASER VLY   QUIL     20    5     250   6     51    8    1050   6
SRN VRISL    QUIL     19    4     200   6     51    9    1250   7
CNTRL VRISL  QUIL     21    5     250   6     51    8    1450   6
NRN VRISL    HRDY      9    3     100   0     51    6    1400   6
TERRACE      ANT      10    1     250   9     60    2    1550   9
STEWART      ANT      10    1     250   9     60    2    1550   8

*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    VR   5   SW   9   W   20
PORT HARDY   S   20   S   24   SW  20
SANDSPIT     S   43   S   41   S   31

TODAY'S VENTING: FAIR TO GOOD.


VENTING FOR MONDAY:  GOOD.




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


END/