FPCN39 CWLW 161411
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 SATURDAY 16 JANUARY 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    2     200   3     26    4     750   3
KAMLOOPS     KEL       9    1     350   3     24    3     850   3
OKANAGAN     KEL       9    0     350   3     20    2     700   3
CASTLEGAR    SPOK      9    1     500   7      9    2     500   7
CRANBROOK    SPOK     10   -1     950   5     10    0     950  10
REVELSTOKE   KEL       9    0     450   3      9    0     450   3

*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   W   41
CRANBROOK             W   19   W   50

TODAY'S VENTING: GENERALLY POOR.

VENTING FOR SUNDAY: 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.      9   -3     950   5      9   -2     950  10
PR. GEORGE   P.G.      9   -7     700   4      9   -3     700   4
SMITHERS     P.G.     10   -4     750   1     11   -3     750   1
WELLS GRAY   P.G.      9   -6    1000   5     25   -3    1000  15
FT NLSN      F.N.      9   -8     400   7      9   -7     400   7
FT STJOHN    F.N.      9   -3     700   7      9   -2     700   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            N   13   NW  19
SMITHERS              SE  15   VR  19

TODAY'S VENTING: GENERALLY POOR.

VENTING FOR SUNDAY: POOR

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL      9    5     100  10     54    7     400  15
FRASER VLY   QUIL      9    6      50   9     35    7     300  12
SRN VRISL    QUIL     22    7     150   9     45    9    1150  12
CNTRL VRISL  QUIL     13    6      50   9     22    7     150   9
NRN VRISL    HRDY      9    5     100   8     29    6     300   8
TERRACE      ANT       9    0     200   9      9    1     200   7
STEWART      ANT       9    0       0   9      9    1       0   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 SATURDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   17   W   22   W   20
PORT HARDY   S   15   SW  15   W   13
SANDSPIT     NE  22   NE  19   N   13

TODAY'S VENTING: POOR MANY AREAS RISING TO FAIR OVER SOUTHWESTERN BC
AND SOUTHERN VANCOUVER ISLAND THIS AFTERNOON.

VENTING FOR SUNDAY: POOR

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


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