FPCN39 CWLW 131400
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 13 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      17   23     700   2     45   28    1350   4
KAMLOOPS     KEL      16   22     800   2     40   26    1300   4
OKANAGAN     KEL      11   20     550   1     45   27    1500   4
CASTLEGAR    SPOK      9   18     500   6     44   26    1100   7
CRANBROOK    SPOK      9   17     950   5     33   24    1450   5
REVELSTOKE   KEL      10   17     500   1     34   24    1200   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 SUNDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   VR   5   S    9
CRANBROOK             VR   5   SE  17

TODAY'S VENTING: FAIR.

VENTING FOR MONDAY: 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.     12   18     950  15    100   22    3950  18
PR. GEORGE   P.G.     19   17     850   6     34   21    1050   8
SMITHERS     P.G.     22   18     850   4    100   21     950  12
WELLS GRAY   P.G.     20   17     850   6    100   22    4000  18
FT NLSN      F.N.      9   16     600   0    100   23    2550  14
FT STJOHN    F.N.     46   15    1000  16    100   21    2700  16

*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            S   20   S   26
SMITHERS              S    9   S   26

TODAY'S VENTING: GOOD IN THE WEST THIS AFTERNOON.

VENTING FOR MONDAY: FAIR IN THE MORNING. GOOD IN THE AFTERNOON.

COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL    100   20    1150  19    100   23    1900  22
FRASER VLY   QUIL    100   21    1300  19    100   26    2100  22
SRN VRISL    QUIL     68   18     650  13    100   22    1400  17
CNTRL VRISL  QUIL     78   19     800  13    100   23    1850  18
NRN VRISL    HRDY     25   18     200   9    100   21    1550  15
TERRACE      ANT     100   18    1450  24    100   23    3200  34
STEWART      ANT     100   18    1150  19    100   23    3000  30

*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    E    9   SE  13   S   17
PORT HARDY   S   19   SE  30   S   33
SANDSPIT     S   52   S   59   S   56

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/
$$$$^^