FPCN39 CWLW 171326 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 WEDNESDAY 17 JUNE 1998 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 9 14 200 5 100 20 2050 14 KAMLOOPS KEL 9 14 350 5 100 20 2500 16 OKANAGAN KEL 9 13 350 5 100 20 2500 16 CASTLEGAR SPOK 45 15 900 11 100 19 1950 14 CRANBROOK SPOK 10 12 950 15 100 16 3950 20 REVELSTOKE KEL 9 13 450 5 51 16 1000 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 MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON W 13 W 28 NW 41 CRANBROOK W 11 W 28 INVERSION HT BREAKTHRU TEMP KELOWNA 600 m 17 C SPOKANE 1500 m 18 C TODAY'S VENTING: 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. 47 7 1050 9 86 14 2420 9 PR. GEORGE P.G. 52 8 1160 8 90 16 2430 8 SMITHERS P.G. 50 9 1250 7 88 15 2450 7 WELLS GRAY P.G. 45 5 1270 4 85 13 2530 5 FT NLSN F.N. 9 10 400 14 81 13 1200 14 FT STJOHN F.N. 69 11 1350 13 92 14 1800 13 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE NW 24 NW 28 SMITHERS NW 28 N 28 INVERSION HT BREAKTHRU TEMP PR. GEORGE 850 m 15 C FT. NELSON 730 m 17 C TODAY'S VENTING: GOOD COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 43 13 400 9 100 16 1450 16 FRASER VLY QUIL 61 13 550 14 100 16 1400 16 SRN VRISL QUIL 28 12 300 7 100 17 1600 15 CNTRL VRISL QUIL 9 11 50 4 100 17 1650 15 NRN VRISL HRDY 16 10 150 5 100 13 1600 16 TERRACE ANT 47 11 1450 4 100 18 2600 8 STEWART ANT 38 12 1100 3 95 18 2250 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 MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER W 35 NW 41 NW 44 PORT HARDY NW 57 NW 59 N 56 SANDSPIT NW 50 NW 48 NW 48 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 1500 m 22 C PORT HARDY 1050 m 17 C ANNETTE 2100 m 22 C TODAY'S VENTING: GOOD VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/