FPCN39 CWLW 271400 SMOKE CONTROL FORECAST FOR BC AND YUKON ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF ENVIRONMENT CANADA AT 7:00 AM PDT THURSDAY 27 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 61/GOOD 771 19 100/GOOD 1778 59 100/GOOD 1369 19 KAMLOOPS 54/FAIR 1085 16 100/GOOD 1644 44 100/GOOD 2269 27 OKANAGAN 50/FAIR 1000 19 100/GOOD 1813 37 100/GOOD 2083 21 CASTLEGAR 44/FAIR 833 13 86/GOOD 1508 41 73/GOOD 1630 17 CRANBROOK 29/POOR 969 9 91/GOOD 2351 25 35/FAIR 1468 23 REVELSTOKE 41/FAIR 1022 22 88/GOOD 1441 23 69/GOOD 1221 13 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m PENTICTON 0 0 W 20 W 33 CRANBROOK W 13 W 37 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 50/FAIR 1466 16 92/GOOD 2498 36 86/GOOD 2678 29 100 MILE 48/FAIR 1566 16 87/GOOD 2589 45 90/GOOD 2883 28 WILLIAMS LK 53/FAIR 1852 13 100/GOOD 2670 38 100/GOOD 2900 26 PUNTZI MNT 61/GOOD 1441 23 100/GOOD 2172 33 100/GOOD 2564 31 PR. GEORGE 52/FAIR 1593 24 97/GOOD 2267 36 100/GOOD 2771 25 BURNS LAKE 31/POOR 1088 14 88/GOOD 1616 28 79/GOOD 1909 28 SMITHERS 51/FAIR 646 25 53/FAIR 923 36 61/GOOD 1830 23 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m PR. GEORGE SW 43 W 30 SMITHERS S 41 S 44 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 15/POOR 505 8 86/GOOD 2039 31 47/FAIR 1070 5 FT STJOHN 37/FAIR 957 11 83/GOOD 2476 29 63/GOOD 1971 13 WHITEHORSE 30/POOR 1083 7 81/GOOD 2298 24 82/GOOD 2011 20 DAWSON 31/POOR 570 8 69/GOOD 2947 19 68/GOOD 1866 22 WATSON LAKE 17/POOR 770 5 73/GOOD 1844 34 75/GOOD 1782 15 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m DEASE LAKE SE 35 SE 31 WATSON LAKE SE 43 SE 33 WHITEHORSE E 28 SE 26 MAYO SE 13 SE 11 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 34/FAIR 398 12 71/GOOD 759 32 76/GOOD 668 27 FRASER VLY 50/FAIR 723 11 80/GOOD 978 26 98/GOOD 916 23 SRN VRISL 21/POOR 123 19 67/GOOD 370 34 100/GOOD 466 31 CNTRL VRISL 25/POOR 138 15 74/GOOD 493 38 100/GOOD 599 25 NRN VRISL 58/GOOD 311 43 100/GOOD 597 37 74/GOOD 656 31 TERRACE 28/POOR 333 15 68/GOOD 996 45 53/FAIR 1103 17 STEWART 14/POOR 71 15 47/FAIR 271 25 49/FAIR 279 9 FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H) : 900m 1800m 2700m VANCOUVER SW 22 SW 30 SW 37 SANDSPIT SW 33 S 31 S 31 PORT HARDY S 42 SW 52 SW 50 VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET END/MtnWC $$$$^^