FPCN39 CWLW 271357
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 TUESDAY 27 JANUARY 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      12    4     500   1     13    6     550   1
KAMLOOPS     KEL      10    2     500   1     18    5     650   3
OKANAGAN     KEL      10    2     500   1     26    6     800   4
CASTLEGAR    SPOK      9    2     500   8      9    3     500   8
CRANBROOK    SPOK      9    0     950   4      9    3     950   4
REVELSTOKE   KEL      10    2     500   1     10    3     550   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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   W   19
CRANBROOK             W    9   W   26

TODAY'S VENTING: POOR.

VENTING FOR WEDNESDAY: 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    0     950  20     10    4     950  20
PR. GEORGE   P.G.      9    3     700  19     30    5     850  18
SMITHERS     P.G.      9    0     500   7      9    0     500   7
WELLS GRAY   P.G.      9    0    1000  20     32    2    1150  19
FT NLSN      F.N.     16  -16     600   3     19  -14     750   3
FT STJOHN    F.N.     48    2    1100  12     51    4    1100  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 TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  35   SW  43
SMITHERS              S   28   S   43

TODAY'S VENTING: POOR EXCEPT FAIR NORTHEAST.


VENTING FOR WEDNESDAY: POOR




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     16    7     200   6     42    9     500  10
FRASER VLY   QUIL     17    7     200   6     76   10     900  12
SRN VRISL    QUIL     16    7     150   5     57   10     700   9
CNTRL VRISL  QUIL     16    7     150   5     21    9     300   5
NRN VRISL    HRDY     15    6     150   5     56    9     800   8
TERRACE      ANT      10    3     250  26     10    5     250  26
STEWART      ANT       9    4       0  11      9    5       0  11

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SE  24   S   28   SW  30
PORT HARDY   S   67   S   82   S   74
SANDSPIT     SE  91   S   91   S   78

TODAY'S VENTING: POOR INLAND. GOOD OUTER COAST.

VENTING FOR WEDNESDAY: FAIR.


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


END/KAL