FPCN39 CWLW 101350 CCA
CORRECTED SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR
INCLUDING THE NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE
OF ENVIRONMENT CANADA AT 6.50 AM PDT SATURDAY 10 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   19     180   5     90   31    1900  18
KAMLOOPS     KEL       9   18     350   5     85   30    2100  10
OKANAGAN     KEL       9   17     350   5     85   30    2100   8
CASTLEGAR    SPOK      9   16     500   5     80   30    2150   8
CRANBROOK    SPOK      9   16     950   5     80   28    2700   8
REVELSTOKE   KEL       9   16     450   5     70   27    1700   8

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

FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   SW  15   SW  28
CRANBROOK             W    9   W   17

TODAY'S VENTING: GOOD

VENTING FOR SUNDAY: 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   17     950   5    100   25    3950  19
PR. GEORGE   P.G.      9   15     700   5     70   24    1850  12
SMITHERS     P.G.      9   12     523   5     27   22     900   7
WELLS GRAY   P.G.      9   12    1000   5    100   25    4000  19
FT NLSN      F.N.      9   14     400   5     55   26    1200   7
FT STJOHN    F.N.      9   17     700   5    100   25    3700   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  22   SW  33
SMITHERS              SW  31   SW  33

TODAY'S VENTING: GOOD LOCALLY POOR IN THE SMITHERS AREA

VENTING FOR SUNDAY: GOOD

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9   18     100   5     67   23     600  16
FRASER VLY   QUIL      9   17     100   5     96   28    1400  12
SRN VRISL    QUIL      9   17      50   5     59   25     850   8
CNTRL VRISL  QUIL      9   19      50   5     60   25     850   8
NRN VRISL    HRDY      9   14      50   5     35   19     400   8
TERRACE      ANT       9   15     220   5    100   21    3200  27
STEWART      ANT       9   16      50   5    100   21    1100  18

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

FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  11   SW  17   SW  30
PORT HARDY   S   19   S   31   SW  37
SANDSPIT     S   43   S   50   S   48

TODAY'S VENTING: GOOD LOCALLY FAIR

VENTING FOR SUNDAY: GOOD

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

END/mwso
$$$$^^