FPCN39 CWLW 031528
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 3 NOVEMBER 1997 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      70   11     500  20     80   13    1100   12
KAMLOOPS     KEL      70   11    1000  15     80   13    1600   10
OKANAGAN     KEL       9    9     350   8     34   12    1350    3
CASTLEGAR    SPOK     27    7     800   6     32    9     900    6
CRANBROOK    SPOK      9    2     950   5      9    7     950   10
REVELSTOKE   KEL       9    7     450   5      9    8     450    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    SW  11   W   33   W   78
CRANBROOK             W   20   W   63

TODAY'S VENTING: Fair to good.

VENTING FOR TUESDAY: FAIR.

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.     57    6    1550  10     79    8    2050  10
PR. GEORGE   P.G.     18    3     850   5     28    6    1000   6
SMITHERS     P.G.     11    3     700   1     28    7    1000   4
WELLS GRAY   P.G.     62    6    1700  10     99    9    2650  10
FT NLSN      F.N.      9   -1     400  12     46    0     750  12
FT STJOHN    F.N.     70    3    1350  13     85    5    1600  14

*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            VR   5   W    9
SMITHERS              SW  19   SW   9

TODAY'S VENTING: Good.

VENTING FOR TUESDAY: Fair.

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     19   12     150  11     56   13     350  22
FRASER VLY   QUIL      9   11      50  11     55   13     300  22
SRN VRISL    QUIL      9   11       0   7     29   13     250   9
CNTRL VRISL  QUIL     13   12     100   7     29   13     250   9
NRN VRISL    HRDY     18   10     100  13     57   11     400  15
TERRACE      ANT      10    6     250  11     10    8     250  11
STEWART      ANT      15    9     250   3     10    8      50   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 MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   37   W   54   W   67
PORT HARDY   W   28   W   41   W   50
SANDSPIT     SW  30   SW  33   SW  39

TODAY'S VENTING: Good.

VENTING FOR TUESDAY: Fair.

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


END/DB