FPCN39 CWLW 091344
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 9 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    5     500  10     46    7    1500   8
KAMLOOPS     KEL       9    3     500   5     48    6     800  10
OKANAGAN     KEL       9    2     450   0     30    5     650   4
CASTLEGAR    SPOK     10    3     800   3     37    5     950   7
CRANBROOK    SPOK      9   -1     950   2     29    2     950   5
REVELSTOKE   KEL       9    2     500   0     21    3     550   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
PENTICTON    VR   5   W   19   W   35
CRANBROOK             VR   5   SW  24

TODAY'S VENTING: FAIR

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.     12   -6    1450   5     42   -4    1600   8
PR. GEORGE   P.G.     12   -9    1250   8     40   -6    1450   8
SMITHERS     P.G.     48   -8    1200   7     42   -5    1300   7
WELLS GRAY   P.G.     44   -7    1450   9     48   -5    1550   8
FT NLSN      F.N.      9  -22     400   0     26  -14     950   3
FT STJOHN    F.N.     12  -15    1150   4     31  -12    1350   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            S    9   SW  20
SMITHERS              S   26   SW  20

TODAY'S VENTING: 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     14    7     100  10     50    9     700  13
FRASER VLY   QUIL      9    7     150   8     45    9     600  10
SRN VRISL    QUIL     16    8     100  10     52   10     950  13
CNTRL VRISL  QUIL      9    6     150  10     36    8     150  13
NRN VRISL    HRDY     17    6     300   3     59    9    1000  13
TERRACE      ANT      19   -2     200  15     50    0     500  15
STEWART      ANT      74   -2     500  12     43    0     750  12

*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  19   W   22   W   28
PORT HARDY   S   22   S   28   SW  30
SANDSPIT     S   35   SW  37   SW  35

TODAY'S VENTING: FAIR

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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