FPCN39 CWLW 201400 SMOKE CONTROL FORECAST FOR BC AND YUKON ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF ENVIRONMENT CANADA AT 7:00 AM PDT THURSDAY 20 APRIL 2000 FOR TODAY. VENTILATION INDICES AND MIXING HEIGHTS. MIXING HEIGHTS IN METRES ABOVE SEA LEVEL. AVERAGE WINDS IN KM/HR. SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. SOUTHERN INTERIOR *** TODAY *** *** TOMORROW *** ****** 7:00 AM **** **** 4:00 PM ***** ***** 4:00 PM ***** VI MXG HT Wnd VI MXG HT Wnd VI MXG HT Wnd (m) (km/h) (m) (km/h) (m) (km/h) FRSR CANYON 88/GOOD 826 12 100/GOOD 1576 10 100/GOOD 890 21 KAMLOOPS 87/GOOD 963 14 100/GOOD 2336 14 100/GOOD 1268 23 OKANAGAN 40/FAIR 802 10 100/GOOD 2117 14 100/GOOD 1775 23 CASTLEGAR 17/POOR 628 8 100/GOOD 1986 9 100/GOOD 1982 15 CRANBROOK 16/POOR 1060 4 100/GOOD 2755 17 100/GOOD 2601 18 REVELSTOKE 19/POOR 619 8 94/GOOD 1581 8 79/GOOD 1121 12 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m PENTICTON W 9. W 20 W 17 CRANBROOK 0 0 W 17 CENTRAL INTERIOR *** TODAY *** *** TOMORROW *** ****** 7:00 AM **** **** 4:00 PM ***** ***** 4:00 PM ***** VI MXG HT Wnd VI MXG HT Wnd VI MXG HT Wnd (m) (km/h) (m) (km/h) (m) (km/h) QUESNEL 100/GOOD 1905 2 100/GOOD 3146 16 100/GOOD 1912 25 100 MILE 100/GOOD 1927 8 100/GOOD 3274 17 100/GOOD 1923 25 WILLIAMS LK 100/GOOD 2170 13 100/GOOD 3365 16 100/GOOD 2297 23 PUNTZI MNT 100/GOOD 1752 18 100/GOOD 2768 19 100/GOOD 2535 30 PR. GEORGE 47/FAIR 1644 9 100/GOOD 2675 4 100/GOOD 1763 23 BURNS LAKE 100/GOOD 1512 12 100/GOOD 2255 19 100/GOOD 1612 18 SMITHERS 76/GOOD 1068 14 100/GOOD 1780 18 100/GOOD 1664 17 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m PR. GEORGE W 35 SW 41 SMITHERS SW 46 SW 57 NORTHERN BC/YUKON *** TODAY *** *** TOMORROW *** ****** 7:00 AM **** **** 4:00 PM ***** ***** 4:00 PM ***** VI MXG HT Wnd VI MXG HT Wnd VI MXG HT Wnd (m) (km/h) (m) (km/h) (m) (km/h) FT NLSN 21/POOR 532 12 100/GOOD 2328 17 100/GOOD 2374 22 FT STJOHN 20/POOR 878 6 100/GOOD 2662 14 100/GOOD 2598 23 WHITEHORSE 100/GOOD 1419 25 100/GOOD 1502 38 100/GOOD 2093 21 DAWSON 35/FAIR 515 32 81/GOOD 632 38 48/FAIR 841 9 WATSON LAKE 20/POOR 820 12 100/GOOD 2394 23 100/GOOD 2177 18 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m DEASE LAKE SW 33 SW 52 WATSON LAKE W 50 W 50 WHITEHORSE SW 41 SW 67 MAYO SW 33 SW 26 COAST *** TODAY *** *** TOMORROW *** ****** 7:00 AM **** **** 4:00 PM ***** ***** 4:00 PM ***** VI MXG HT Wnd VI MXG HT Wnd VI MXG HT Wnd (m) (km/h) (m) (km/h) (m) (km/h) VANCOUVER 24/POOR 319 4 43/FAIR 649 5 33/POOR 181 30 FRASER VLY 21/POOR 289 8 86/GOOD 1418 7 100/GOOD 662 26 SRN VRISL 26/POOR 384 6 31/POOR 415 5 30/POOR 158 21 CNTRL VRISL 32/POOR 544 1 80/GOOD 1083 10 47/FAIR 283 25 NRN VRISL 100/GOOD 636 24 100/GOOD 1008 28 82/GOOD 544 19 TERRACE 72/GOOD 704 14 100/GOOD 1124 16 100/GOOD 1040 13 STEWART 40/FAIR 277 17 32/POOR 157 20 66/GOOD 504 14 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m VANCOUVER S 12 S 22 SW 33 SANDSPIT SW 20 SW 31 SW 35 PORT HARDY S 22 SW 30 SW 46 VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET END/ $$$$^^