FPCN39 CWLW 031315
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 SATURDAY 3 OCTOBER 1998 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   10     500   0    100   17    2900  10
KAMLOOPS     KEL       9   10     550   0    100   17    3350  10
OKANAGAN     KEL       9    9     500   0    100   17    3350  10
CASTLEGAR    SPOK     47   10     950  10    100   16    2900  14
CRANBROOK    SPOK     69    8    1450  17    100   15    3950  16
REVELSTOKE   KEL       9    8     500   0     77   11    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  13   SW  26
CRANBROOK             W   11   W   24

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.     97    6    2000  16    100   10    2700  19
PR. GEORGE   P.G.     43    4    1250   7     85    8    1900  10
SMITHERS     P.G.     52    6    1300   7     79    9    1800   9
WELLS GRAY   P.G.    100    8    2400  18    100   10    2800  20
FT NLSN      F.N.     10    0     400  15     74    2    1000  15
FT STJOHN    F.N.     64    0    1200  15     85    2    1500  16

*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
SMITHERS              W   20   W

TODAY'S VENTING: GOOD




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     45   12     500  11    100   15    1700  15
FRASER VLY   QUIL     19   11     250   6    100   15    1650  15
SRN VRISL    QUIL     37   12     400   9    100   16    1850  14
CNTRL VRISL  QUIL     16   11     150   6    100   15    1550  14
NRN VRISL    HRDY     14   10     150   5     35   12     450   7
TERRACE      ANT       9    8     250   1     47   11    1350   4
STEWART      ANT      10    9      50   3     19   11     450   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  19   W   28   W   28
PORT HARDY   NW  22   NW  24   NW  22
SANDSPIT     NW  19   NW  22   W   24

TODAY'S VENTING: GOOD




VENTING FOR SUNDAY: GOOD




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


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