FPCN39 CWLW 061400
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 SUNDAY 6 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      87   13    1600   9    100   18    3200   9
KAMLOOPS     KEL      94   12    2050   9    100   17    3350   9
OKANAGAN     KEL      76   11    1350  10    100   18    3350   9
CASTLEGAR    SPOK     93   11    1400  17    100   16    3500  19
CRANBROOK    SPOK    100   12    3950  20    100   17    3950  20
REVELSTOKE   KEL      71   10    1350  10    100   15    3450   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W    9   W   19   W   22
CRANBROOK             SW  13   SW  26

TODAY'S VENTING: GOOD




VENTING FOR MONDAY: 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    7    1950  17    100   15    3950  13
PR. GEORGE   P.G.     93    9    1600  16    100   15    3700  13
SMITHERS     P.G.     11    6     600   2    100   12    2600  11
WELLS GRAY   P.G.     ##   ##     ###  ##    100   15    4000  13
FT NLSN      F.N.    100    7    1350  21    100   10    1750  22
FT STJOHN    F.N.    100    6    1650  26    100   12    2650  25

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   24   W   26
SMITHERS              W   17   NW  26

TODAY'S VENTING: GOOD




VENTING FOR MONDAY: GOOD




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     91   12    1750   9    100   15    2750   9
FRASER VLY   QUIL     75   11    1350   8    100   15    2700   9
SRN VRISL    QUIL     75   12    1500   7    100   16    2900   7
CNTRL VRISL  QUIL     76   12    1550   7    100   16    2900   7
NRN VRISL    HRDY     46    9     700   7     92   12    1600   9
TERRACE      ANT      46    8     850   7     77   13    1950   6
STEWART      ANT      44   10     850   5     69   13    1750   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  15   W   19   W   17
PORT HARDY   S   20   S   22   S   11
SANDSPIT     N    9   N   17   NE  28

TODAY'S VENTING: GOOD




VENTING FOR MONDAY: GOOD




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


END/
$$$$^^