FPCN39 CWLW 021422
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 PST MONDAY 2 MARCH 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    3     200   1     14    5     700   1
KAMLOOPS     KEL      12    3     600   1     23    5     950   3
OKANAGAN     KEL      12    3     600   1     17    4     800   2
CASTLEGAR    SPOK      9    3     500   4      9    4     500   4
CRANBROOK    SPOK     10    2     950  12     10    5     950  12
REVELSTOKE   KEL       9    0     450   1      9    1     450   1

*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    VR   5   W    9   W   17
CRANBROOK             S   19   S   50

TODAY'S VENTING: POOR

VENTING FOR TUESDAY: POOR

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.     59    2    1500  12     50    6    2950   8
PR. GEORGE   P.G.     23    1     900   8     48    4    1300   8
SMITHERS     P.G.      9    0     500   2     24    2     850   5
WELLS GRAY   P.G.    100    3    2200  15     50    7    3000   8
FT NLSN      F.N.     37   -7    1000   5     42   -6    1150   5
FT STJOHN    F.N.     32   -6    1200   5     32   -3    1250   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SE   9   S   22
SMITHERS              E   17   E   22

TODAY'S VENTING: POOR TO FAIR

VENTING FOR TUESDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     53    8     850   7     88   10    1550   9
FRASER VLY   QUIL     12    6     200   2     50    8     750   7
SRN VRISL    QUIL     10    5     100   1     60    9    1050   7
CNTRL VRISL  QUIL      9    4      50   0     60    5     750   7
NRN VRISL    HRDY     11    4     100   2     55    8    1300   5
TERRACE      ANT       9    3     250   2     37    5    1050   4
STEWART      ANT      11    2      50   5     16    5     150   5

*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    SW  11   SW  15   SW  19
PORT HARDY   S    9   S    9   VR   5
SANDSPIT     N   19   N   20   N   19

TODAY'S VENTING: GOOD ON THE COAST. FAIR TO POOR INLAND.

VENTING FOR TUESDAY: POOR

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


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