FPCN39 CWLW 261332
SMOKE CONTROL FORECAST FOR BC AND YUKON ISSUED BY THE MOUNTAIN WEATHER CENTRE OF
ENVIRONMENT CANADA AT 7:00 AM PDT THURSDAY 26 APRIL 2001 FOR TODAY.

MIXING HEIGHTS IN METRES ABOVE SEA LEVEL.  AVERAGE WINDS IN KM/H.
SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF LOCAL MOUNTAINS OR HILLS.

26-April-2001
SOUTHERN INTERIOR                       TODAY                           TOMORROW
                7:00 AM                 4:00 PM                 4:00 PM
                VI      WND     MXG HT  VI      WND     MXG HT  VI      WND     MXG HT
                        KM/H    M               KM/H    M               KM/H    M
FRASER CANYON   15/POOR 18      286     89/GOOD 18      1611    72/GOOD 17      1204
KAMLOOPS        13/POOR 8       448     99/GOOD 21      2003    99/GOOD 23      2076
OKANAGAN        20/POOR 19      565     99/GOOD 17      2354    92/GOOD 16      2121
CASTLEGAR       16/POOR 14      586     71/GOOD 9       2295    61/GOOD 7       2295
CRANBROOK       10/POOR 6       968     75/GOOD 9       2939    82/GOOD 14      2443
REVELSTOKE      22/POOR 16      592     66/GOOD 10      1874    79/GOOD 11      2243

FORECAST UPPER WINDS FOR THIS AFTERNOON
                900m    1800m   2700m
PENTICTON       0  0    S  41   SW 43
CRANBROOK               SW 24   W  37

CENTRAL INTERIOR                        TODAY                           TOMORROW
                7:00 AM                 4:00 PM                 4:00 PM
                VI      WND     MXG HT  VI      WND     MXG HT  VI      WND     MXG HT
                        KM/H    M               KM/H    M               KM/H    M
QUESNEL         35/FAIR 13      944     99/GOOD 23      2720    99/GOOD 24      2456
100 MILE        24/POOR 20      1086    99/GOOD 22      2602    99/GOOD 24      2555
WILLIAMS LAKE   24/POOR 16      1118    99/GOOD 20      2654    99/GOOD 25      2920
PUNTZI MTN      18/POOR 11      1058    99/GOOD 29      2703    99/GOOD 24      2791
PRINCE GEORGE   39/FAIR 12      1202    99/GOOD 24      2945    99/GOOD 21      2975
BURNS LAKE      26/POOR 17      733     73/GOOD 17      1533    94/GOOD 20      1943
SMITHERS        26/POOR 20      682     75/GOOD 18      1523    82/GOOD 17      1761

FORECAST UPPER WINDS FOR THIS AFTERNOON
                900m    1800m   2700m
PR. GEORGE              SW 33   SW 31
SMITHERS                SW 28   S  31

NORTHERN BC/YUKON                       TODAY                           TOMORROW
                7:00 AM                 4:00 PM                 4:00 PM
                VI      WND     MXG HT  VI      WND     MXG HT  VI      WND     MXG HT
                        KM/H    M               KM/H    M               KM/H    M
FORT NELSON     33/FAIR 20      627     99/GOOD 16      2484    99/GOOD 23      3100
FT ST JOHN      17/POOR 10      849     95/GOOD 18      2288    99/GOOD 21      3175
WHITEHORSE      45/FAIR 16      1184    99/GOOD 23      2187    99/GOOD 23      2391
DAWSON          9/POOR  2       412     96/GOOD 12      2777    48/FAIR 18      845
WATSON LAKE     16/POOR 6       900     99/GOOD 25      2244    99/GOOD 23      2503

FORECAST UPPER WINDS FOR THIS AFTERNOON
                900m    1800m   2700m
DEASE LAKE              S  15   S  22
WATSON LAKE             W  9    0  0
WHITEHORSE              S  19   S  43
MAYO                    0  0    SW 9

COAST                                   TODAY                           TOMORROW
                7:00 AM                 4:00 PM                 4:00 PM
                VI      WND     MXG HT  VI      WND     MXG HT  VI      WND     MXG HT
                        KM/H    M               KM/H    M               KM/H    M
VANCOUVER       12/POOR 15      33      56/GOOD 12      902     65/GOOD 14      1002
FRASER VALLEY   14/POOR 14      129     59/GOOD 12      1051    68/GOOD 15      1058
SRN VAN ISLD    10/POOR 13      38      56/GOOD 12      919     78/GOOD 19      1019
CNTRL VAN ISLD  10/POOR 11      45      56/GOOD 12      924     63/GOOD 13      1024
NRN VAN ISLD    25/POOR 20      177     87/GOOD 30      808     78/GOOD 19      1022
TERRACE         24/POOR 17      380     48/FAIR 18      697     64/GOOD 15      1117
STEWART         22/POOR 20      126     16/POOR 18      78      69/GOOD 17      907

FORECAST UPPER WINDS FOR THIS AFTERNOON
                900m    1800m   2700m
VANCOUVER       S  19   SW 37   SW 54
SANDSPIT        S  43   S  43   SW 57
PORT HARDY      S  48   S  48   S  54


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

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