FPCN39 CWLW 111432
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 MONDAY 11 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      39    8     650   7     58    7    1500   6
KAMLOOPS     KEL       0    2     350   6     63    4    1250   6
OKANAGAN     KEL      18    5     500   6     63    6    1600   6
CASTLEGAR    SPOK      9    2     500  12     59    3    1500  12
CRANBROOK    SPOK      9    5     950  30     59    7    1500  12
REVELSTOKE   KEL       9    1     450   6     39    2     750   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W    9   W   24   NW  44
CRANBROOK             W   24   W   69

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


VENTING FOR TUESDAY: POOR THIS MORNING. BECOMING GOOD IN THE
AFTERNOON WEST OF THE ROCKIES BUT REMAINING POOR TO THE EAST.


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    2     950  23     60    4    1450  13
PR. GEORGE   P.G.      9    2     700  14     66    3    1400   9
SMITHERS     P.G.      9    0     500   2     57    1    1300   9
WELLS GRAY   P.G.     10    2     800  10     59    3    1500  13
FT NLSN      F.N.     39  -22     900   6     39  -22     900   6
FT STJOHN    F.N.     33  -19    1400  11     33  -15     900  13


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

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   22   W   35
SMITHERS              W   41   W   35

TODAY'S VENTING: POOR THIS MORNING. BECOMING GOOD IN THE
AFTERNOON WEST OF THE ROCKIES BUT REMAINING POOR TO THE EAST.



VENTING FOR TUESDAY: POOR.



COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     69    9     300  35     69    9     500  15
SRN VRISL    QUIL     53    8      50   8     54    9     500   8
CNTRL VRISL  QUIL     53    8     100   8     53    8     500   8
NRN VRISL    HRDY     51    7      50   8     63    8     700   8
TERRACE      ANT      510    4    200  21     60    4     700  21
STEWART      ANT      40    3     100  ##     49    4     500  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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    VR   5   W   15   NW  30
PORT HARDY   VR   5   W   20   W   31
SANDSPIT     SW  35   SW  43   W   57

TODAY'S VENTING: FAIR THIS MORNING BECOMING GOOD IN THE AFTERNOON.


VENTING FOR TUESDAY: POOR


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


END/GF