FPCN39 CWLW 031417 AAA
REVISED SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR
INCLUDING THE NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE
OF ENVIRONMENT CANADA AT 7.15 AM PDT SATURDAY 3 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      70   15    1450   7    100   21    2900   8
KAMLOOPS     KEL      94   15    2300   8    100   21    3350   8
OKANAGAN     KEL      55   13    1200   7    100   19    2850   8
CASTLEGAR    SPOK     46   14    1300   5    100   21    3500  11
CRANBROOK    SPOK    100   13    3950  13    100   20    3950  13
REVELSTOKE   KEL      79   13    1850   8    100   17    2600   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    W    9   W   11   NW   9
CRANBROOK             SW  15   SW  33

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   11     950  16    100   16    2600  22
PR. GEORGE   P.G.     22   11     800  11     75   14    1350  15
SMITHERS     P.G.      9   10     500   1     75   14    1600  11
WELLS GRAY   P.G.     11    9     900   7    100   16    2650  22
FT NLSN      F.N.      9   13     400   4    100   15    2500  15
FT STJOHN    F.N.      9   11     700  15    100   17    3700  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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            N   17   NE  20
SMITHERS              NW   9   N   20

TODAY'S VENTING: GOOD THIS AFTERNOON.

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     66   14    1250   7    100   18    2300   8
FRASER VLY   QUIL     53   13     900   7     90   17    2000   7
SRN VRISL    QUIL     58   14    1050   6     96   18    2200   7
CNTRL VRISL  QUIL     69   15    1350   6    100   19    2450   8
NRN VRISL    HRDY     28   13     700   3     35   15     850   4
TERRACE      ANT      11   15     400   1     18   21     900   1
STEWART      ANT      17   14     300   3     21   21     650   2

*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  24   NW  15   N   26
PORT HARDY   VR   5   VR   5   VR   5
SANDSPIT     NW  26   N   24   N   28

TODAY'S VENTING: GOOD EXCEPT POOR TO FAIR NORTH.

VENTING FOR SUNDAY: GOOD




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


END/JDG
$$$$^^