FPCN39 CWLW 301400
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 30 AUGUST 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   2     51   20    1550   4
KAMLOOPS     KEL      44   18    1450  10    100   23    3350  15
OKANAGAN     KEL      44   18    1450   4    100   22    3350  12
CASTLEGAR    SPOK     42   19     900  10     70   23    1250  15
CRANBROOK    SPOK     38   19    1350   8     98   25    2700   9
REVELSTOKE   KEL      41   17    1450  10     70   19    2000  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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    NW   9   NW  20   NW  33
CRANBROOK             S   15   S   37

TODAY'S VENTING: FAIR EXCEPT POOR IN THE FRASER CANYON THIS MORNING.
RISING TO GOOD MOST AREAS THIS AFTERNOON EXCEPT FAIR OVER THE FRASER
CANYON.

VENTING FOR TUESDAY: 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.     30    8    1550   5    100   14    3950  14
PR. GEORGE   P.G.     45    8     900   9    100   14    2700  17
SMITHERS     P.G.     49   10    1000  10    100   15    2600  13
WELLS GRAY   P.G.     40    7    1500  15    100   14    4000  14
FT NLSN      F.N.      9   11     700   0    100   14    1750  14
FT STJOHN    F.N.     54   12    2050  10    100   17    3700  22

*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            W   20   W   20
SMITHERS              W   17   W   20

TODAY'S VENTING: POOR TO FAIR THIS MORNING RISING TO GOOD AT ALL
LOCATIONS THIS AFTERNOON.

VENTING FOR TUESDAY: GOOD


COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     30   14     600  10    100   18    1600  14
FRASER VLY   QUIL     20   14     600   6    100   17    2000  15
SRN VRISL    QUIL     29   14     550   8     89   17    1500  12
CNTRL VRISL  QUIL     79   16     950  12    100   21    2400  12
NRN VRISL    HRDY     40   12     400   9     89   15    1150  12
TERRACE      ANT      62   12    1200   7    100   17    2450   8
STEWART      ANT      40   13     700   5     94   17    2150   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   31   W   30   W   22
PORT HARDY   NW  26   NW  26   NW  20
SANDSPIT     W   22   W   20   NW  24

TODAY'S VENTING: FAIR TO GOOD THIS MORNING RISING TO GODD AT ALL
LOCATIONS THIS AFTERNOON.

VENTING FOR TUESDAY: GOOD


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


END/
$$$$^^