FPCN39 CWLW 241434
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 8:00 AM PDT Tuesday 24 June 1997 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   17     650   3    100   22    3200  10
KAMLOOPS     KEL      74   18    1750   7    100   24    3350  10
OKANAGAN     KEL      37   17    1150   4    100   22    3350  10
CASTLEGAR    SPOK     52   15    1000  10    100   20    3500  14
CRANBROOK    SPOK     39   12    1200  14    100   18    3950  15
REVELSTOKE   KEL      14   14     650   3    100   18    3450  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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   VR   5
CRANBROOK             VR   5   VR   5

           INVERSION HT    BREAKTHRU TEMP
KELOWNA          900 m         17 C
SPOKANE         1100 m         16 C

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: GOOD.

VENTING OUTLOOK THURSDAY THRU SATURDAY: 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.     28   14    1250   7     85   22    3950   4
PR. GEORGE   P.G.     48   16    1150  10     98   22    3700   6
SMITHERS     P.G.     36   16     950   7     82   23    2750   5
WELLS GRAY   P.G.     32   14    1350   7     85   22    4000   4
FT NLSN      WHIT     25   18     900   4    100   24    3400   9
FT STJOHN    WHIT     20   16     950   4    100   22    3700   9

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   11   SW  11
SMITHERS              W    9   S   11

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE      1700 m         22 C
FT. NELSON      MISSING.

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: GOOD.

VENTING OUTLOOK THURSDAY THRU SATURDAY: GOOD.


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     72   15    1650   6     72   18    1850   5
FRASER VLY   QUIL     70   15    1500   6     73   19    1900   5
SRN VRISL    QUIL     66   16    1700   5     66   19    1900   4
CNTRL VRISL  QUIL     56   15    1350   5     66   19    1900   4
NRN VRISL    HRDY     32   14     750   3     61   17    1450   5
TERRACE      ANT      86   18    1500  10    100   24    3200   9
STEWART      ANT      73   18    1100   9    100   24    3000   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W    9   VR   5   S    9
PORT HARDY   S   11   S   22   S   26
SANDSPIT     S   13   SE  22   SE  28

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE       200 m         11 C
PORT HARDY       NONE.
ANNETTE          NONE.

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: GOOD.

VENTING OUTLOOK THURSDAY THRU SATURDAY: GOOD.


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

END/DSL