FPCN39 CWLW 261400
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 PDT SATURDAY 26 JUNE 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      53   16     800   9    100   21    2500   9
KAMLOOPS     KEL      99   16    2000  10    100   21    2800   8
OKANAGAN     KEL      99   16    2000  10    100   21    2800   8
CASTLEGAR    SPOK     57   15    1000  12    100   20    3500  16
CRANBROOK    SPOK    100   13    3950  19    100   18    3950  19
REVELSTOKE   KEL      96   15    2000  10    100   19    2600   9

*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    W    9   W   13   N   19
CRANBROOK             SW  11   W   22

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: GOOD


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.     10   12     950  14    100   17    3950   8
PR. GEORGE   P.G.     63   14    1250  13    100   20    3700   9
SMITHERS     P.G.     39   14    1000   7     78   18    1850   8
WELLS GRAY   P.G.     ##   ##     ###  ##    100   20    4000   8
FT NLSN      F.N.     18   15     700   3    100   21    3400   8
FT STJOHN    F.N.     13   13     750   6    100   19    3700   8

*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            W   19   W   22
SMITHERS              W   19   W   22

TODAY'S VENTING: BECOMING GOOD NEAR NOON.

VENTING FOR SUNDAY: GOOD




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL    100   15    1750  10    100   19    2250  10
FRASER VLY   QUIL     84   14    1300  10    100   18    2150  10
SRN VRISL    QUIL     86   15    1500   9    100   19    2150   9
CNTRL VRISL  QUIL     90   15    1550   9    100   19    2150   9
NRN VRISL    HRDY     66   13     650  12     88   15    1200  11
TERRACE      ANT      63   14    1450   6     99   19    2600   7
STEWART      ANT      57   15    1250   5     89   19    2350   6

*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   19   W   19   NW  13
PORT HARDY   NW  17   W   13   W   17
SANDSPIT     W   15   W   15   W   20

TODAY'S VENTING: GOOD.

VENTING FOR SUNDAY: GOOD




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

END/JDG
$$$$^^