FPCN39 CWLW 271400
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 SUNDAY 27 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   SPOK     56   14     850   9     74   20    1150  10
KAMLOOPS     SPOK     63   17    1050  10    100   22    3350   8
OKANAGAN     SPOK     61   16    1000  10    100   21    3350   8
CASTLEGAR    SPOK     56   16    1100  10    100   22    3500   8
CRANBROOK    SPOK    100   15    3950   7    100   24    3950   7
REVELSTOKE   SPOK     52   14     950  10     61   17    1100  10

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

FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    W    9   W   17   W   15
CRANBROOK             W   13   W   31

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: 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.    100   12    3950  18    100   17    3950  18
PR. GEORGE   P.G.     95   11    1600  17    100   16    3700  17
SMITHERS     P.G.     54   11    1100  10    100   15    3500  15
WELLS GRAY   P.G.    100   12    3950  18    100   17    4000  18
FT NLSN      F.N.     68   17    1100  12    100   22    3400   9
FT STJOHN    F.N.     43   13    1000  13    100   18    2650  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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            SW  17   SW  22
SMITHERS              SW  20   S   22

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: GOOD

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     89   15    1700   8     96   20    1850   9
FRASER VLY   QUIL     90   16    1700   8     99   21    1950   9
SRN VRISL    QUIL     84   15    1650   7     87   19    1800   7
CNTRL VRISL  QUIL     84   15    1650   7     88   20    1800   7
NRN VRISL    QUIL      9   11     150   0     84   15    1650   7
TERRACE      ANT      89   14    1950   8    100   19    3200   7
STEWART      ANT      81   15    1750   6    100   19    2850   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    SW  17   W   17   W   24
PORT HARDY   S   20   SW  26   SW  30
SANDSPIT     S   72   S   67   SW  63

TODAY'S VENTING: GOOD

VENTING FOR MONDAY: GOOD

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

END/ret
$$$$^^