FPCN39 CWLW 081330
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 PDT MONDAY 8 JUNE 1998 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      17   19     600   2    100   29    3200   6
KAMLOOPS     KEL      13   16     550   2    100   27    3350   6
OKANAGAN     KEL      13   16     550   2     89   25    2650   6
CASTLEGAR    SPOK     27   16     850   6    100   24    3500   9
CRANBROOK    SPOK     10   11     950  13    100   20    3950   9
REVELSTOKE   KEL      12   16     600   2    100   25    3450   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    VR   5   VR   5   N   13
CRANBROOK             VR   5   VR   5

           INVERSION HT    BREAKTHRU TEMP
KELOWNA         640 m         18 C
SPOKANE         950 m         15 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.      9   14     950   5    100   24    3950   7
PR. GEORGE   P.G.     10   14     750   3    100   25    3700   6
SMITHERS     P.G.     15   19     850   2    100   29    3500   6
WELLS GRAY   P.G.      9   15    1000   5    100   26    4000   7
FT NLSN      F.N.     28   19     550  12     97   29    3400   5
FT STJOHN    F.N.      9   16     700  12     55   23    1400   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            NW  11   NW  15
SMITHERS              W   19   W   15

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE      1100 m         23 C
FT. NELSON      700 m          24 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     70   17     750  13     82   22     950  13
FRASER VLY   QUIL     74   19     800  13    100   28    3050   8
SRN VRISL    QUIL     28   16     700   3     66   23    1000   8
CNTRL VRISL  QUIL     30   19     800   3    100   28    3050   7
NRN VRISL    HRDY     39   15     400   9     48   19     550   9
TERRACE      ANT      22   19     550   4     42   28    1800   2
STEWART      ANT      24   19     400   4     43   28    1500   3

*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   N   11   N   19
PORT HARDY   NW  17   NW  13   N   13
SANDSPIT     NW  28   W   19   W   17

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE      1200 m         26 C
PORT HARDY      1200 m         30 C
ANNETTE         1800 m         31 C

TODAY'S VENTING: FAIR

VENTING FOR TUESDAY: FAIR

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD




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


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