FPCN39 CWLW 091400
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 WEDNESDAY 9 JUNE 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      95   15    1600  11    100   19    2550  11
KAMLOOPS     KEL     100   15    2400  11    100   19    3350  11
OKANAGAN     KEL      14   11     600   2    100   17    2550  11
CASTLEGAR    SPOK     77   12    1400  11    100   16    3500   9
CRANBROOK    SPOK    100    9    3950   8    100   15    3950   8
REVELSTOKE   KEL      78   12    1400  11    100   17    2600  11

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

FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W    9   W   17   W   15
CRANBROOK             W   13   W   31

TODAY'S VENTING: GOOD

VENTING FOR THURSDAY: 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.     67   10    2000   7    100   15    3950  12
PR. GEORGE   P.G.     45   10    1350   7    100   14    2550   9
SMITHERS     P.G.     39   11    1250   5    100   16    2750   8
WELLS GRAY   P.G.     67   10    2000   7    100   15    4000  12
FT NLSN      F.N.     97   13    1600  13    100   17    3400  15
FT STJOHN    F.N.     53    9    1050  16    100   13    2600  17

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

FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            NW  17   NW  19
SMITHERS              NW  13   N   19

TODAY'S VENTING: GOOD

VENTING FOR THURSDAY: GOOD




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     45   13    1400   3     85   17    1800   4
FRASER VLY   QUIL     31   12     900   3     85   16    1800   4
SRN VRISL    QUIL     15   11     600   1     85   17    1800   4
CNTRL VRISL  QUIL     33   13    1100   3     85   17    1800   4
NRN VRISL    HRDY     27   11     550   4     85   13    1800   4
TERRACE      ANT      37   13    1450   3     85   17    1800   4
STEWART      ANT      35   13    1300   2     85   17    1800   4

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

FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  11   W   13   NW  17
PORT HARDY   NW  17   NW  19   NW  30
SANDSPIT     NW  17   NW  20   N   24

TODAY'S VENTING: GOOD


VENTING FOR THURSDAY: GOOD




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


END/
$$$$^^