FPCN39 CWLW 091433
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 Monday 9 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      53   18     950   7    100   28    3200   7
KAMLOOPS     KEL      54   18    1100   7    100   26    3350   7
OKANAGAN     KEL      41   16     900   7    100   25    3350   7
CASTLEGAR    SPOK     25   16     850   5     87   25    3500   4
CRANBROOK    SPOK     13   16    1050   3     87   23    3950   4
REVELSTOKE   KEL      36   15     900   7    100   25    3450   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 MONDAY 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         1700 m         23 C
SPOKANE         1100 m         19 C

TODAY'S VENTING: good.

VENTING FOR TUESDAY: good.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: 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.    100   14    3950  12    100   21    3950  12
PR. GEORGE   P.G.     58   12    1450   8    100   19    3700  11
SMITHERS     P.G.     38   11    1000   7    100   18    3500  10
WELLS GRAY   P.G.    100   14    4000  12    100   20    4000  12
FT NLSN      F.N.    100   14    1500  31    100   20    3400  29
FT STJOHN    F.N.    100   14    2400  31    100   21    3700  28

*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    9   SW  19
SMITHERS              VR   5   SW  19

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE      1200 m         13 C
FT. NELSON      1000 m         14 C

TODAY'S VENTING: good.

VENTING FOR TUESDAY: good.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: good.


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     40   15     500   9     84   20    1550   8
FRASER VLY   QUIL     43   16     500   9    100   25    2250   8
SRN VRISL    QUIL     39   15     500   7     85   21    1600   8
CNTRL VRISL  QUIL     40   16     500   7     91   23    1850   8
NRN VRISL    HRDY     36   11     350   9     98   16    1350  13
TERRACE      ANT       9   13     800   0    100   18    3000   5
STEWART      ANT       9   12     800   0    100   18    3000   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    VR   5   VR   5   SE   9
PORT HARDY   N    9   SE  11   S   15
SANDSPIT     VR   5   VR   5   S   17

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE       500 m         17 C
PORT HARDY       100 m         11 C
ANNETTE         none

TODAY'S VENTING: good.

VENTING FOR TUESDAY: good.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: decreasing thru period.


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

END/dsl