FPCN39 CWLW 021400
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 2 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      34   13    1100   3    100   20    2450  12
KAMLOOPS     KEL      44   15    1700   3    100   22    3350  10
OKANAGAN     KEL      39   13    1500   3    100   20    2850   7
CASTLEGAR    SPOK     17   12     800   3     72   17    2300   5
CRANBROOK    SPOK     65   11    2000   7    100   15    2750  11
REVELSTOKE   KEL      40   13    1600   3    100   20    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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    N   11   N   20   N   30
CRANBROOK             E   15   E   37

TODAY'S VENTING: BECOMING GOOD BY THIS AFTERNOON.

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.     10   12     950  14    100   18    3950   8
PR. GEORGE   P.G.     31   12     950   9    100   19    3700   8
SMITHERS     P.G.     12   10     700   2     87   18    2200   8
WELLS GRAY   P.G.     12   10    1100  10    100   18    4000   8
FT NLSN      F.N.      9   12     550   0     86   18    2200   7
FT STJOHN    F.N.      9   11     700  10    100   18    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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            VR   5   VR   5
SMITHERS              SW  15   W    5

TODAY'S VENTING: BECOMING GOOD THIS AFTERNOON.

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     20   13     500   3     60   17     500  14
FRASER VLY   QUIL     25   10     500   4     50   17     800   8
SRN VRISL    QUIL     29   12     500   4     60   17     600  12
CNTRL VRISL  QUIL     25   13     500   4    100   18    2600  11
NRN VRISL    HRDY     15   10     100   8     50   14     500  15
TERRACE      ANT      14   12     350   4     43   18    1650   3
STEWART      ANT      17   12     200   4     40   18    1300   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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W    9   NE   9   E   17
PORT HARDY   NW  28   N   17   NE  19
SANDSPIT     W   15   W   17   W   20

TODAY'S VENTING: POOR THIS MORNING. BECOMING FAIR EXCEPT LOCALLY
GOOD IN THE SOUTH THIS AFTERNOON.

VENTING FOR THURSDAY: FAIR TO GOOD.




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


END/MWSO
$$$$^^