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 TUESDAY 6 JULY 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      9   16     200   4      85   29    3200   4
KAMLOOPS     KEL      9   17     400   3      85   27    3350   4
OKANAGAN     KEL      9   15     400   2      85   27    3350   4
CASTLEGAR    SPOK     9   17     600   4      89   27    2200   8
CRANBROOK    SPOK     9   15    1000   2     100   25    3950   7
REVELSTOKE   KEL      9   16     500   4      44   22    1550   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   SE  13   S   17
CRANBROOK             VR   5   S   11

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: 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    1000   2      100   21    3950   7
PR. GEORGE   P.G.    9   12     700   1      100   20    3700   8
SMITHERS     P.G.    9   14     600   2      100   22    3500   7
WELLS GRAY   P.G.    9   14    1100   2      100   21    4000   7
FT NLSN      F.N.    9   11     500   3       74   22    1400  10
FT STJOHN    F.N.    9   11     800   4      100   20    2450  15

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

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            VR   5   S    9
SMITHERS              VR   5   E    9

TODAY'S VENTING: GOOD.

VENTING FOR WEDNESDAY: GOOD.


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     9   16     200   3      32   21     500   6
FRASER VLY   QUIL     9   17     200   3      34   25     950   3
SRN VRISL    QUIL     9   15     200   2      38   23     650   5
CNTRL VRISL  QUIL     9   16     200   4      42   25     900   4
NRN VRISL    HRDY     9   14     100   3      35   18     700   4
TERRACE      ANT      9   13     400   5      71   23    1800   6
STEWART      ANT      9   13     400   4      73   23    1400   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    VR   5   SE  19   S   28
PORT HARDY   N    9   E   11   E   11
SANDSPIT     NW  19   NE   9   VR   5

TODAY'S VENTING: FAIR.

VENTING FOR WEDNESDAY: FAIR TO GOOD.

END/DSL
$$$$^^