FPCN39 CWLW 221418 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 MONDAY 22 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 19 21 700 2 85 28 3200 4 KAMLOOPS KEL 27 21 900 3 85 28 3350 4 OKANAGAN KEL 13 17 550 2 85 26 3350 4 CASTLEGAR KEL 9 16 950 5 82 23 3950 4 CRANBROOK KEL 9 16 950 5 82 23 3950 4 REVELSTOKE KEL 15 19 750 2 85 27 3450 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 MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON VR 5 W 15 W 20 CRANBROOK W 9 W 24 INVERSION HT BREAKTHRU TEMP KELOWNA 1430 M 23C SPOKANE N/A TODAY'S VENTING: GOOD VENTING FOR TUESDAY: GOOD VENTING OUTLOOK WEDNESDAY THRU FRIDAY: 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. 75 18 1500 18 100 24 3950 13 PR. GEORGE P.G. 79 19 1300 17 100 24 3700 13 SMITHERS P.G. 10 18 600 1 93 23 1650 13 WELLS GRAY P.G. 85 19 1850 15 100 25 4000 13 FT NLSN F.N. 52 20 550 32 100 25 1300 24 FT STJOHN F.N. 10 20 700 20 79 23 1450 14 *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 W 22 W 33 SMITHERS W 22 W 33 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1760 M 20C FT. NELSON 1550 M 27C TODAY'S VENTING: FAIR TO GOOD VENTING FOR TUESDAY: GOOD VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 42 17 700 6 53 21 1000 6 FRASER VLY QUIL 47 18 800 6 56 23 1050 6 SRN VRISL QUIL 36 17 600 5 52 22 1000 6 CNTRL VRISL QUIL 47 19 900 5 56 24 1100 6 NRN VRISL HRDY 41 14 400 9 59 17 700 10 TERRACE ANT 54 17 1450 5 89 21 2150 7 STEWART ANT 35 16 1050 3 68 21 1700 5 *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 SW 15 W 19 W 20 PORT HARDY NW 19 NW 22 NW 28 SANDSPIT W 20 W 24 W 30 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 1035 m 24 C PORT HARDY 700 m 20 C ANNETTE 1750 m 21 C TODAY'S VENTING: FAIR TO GOOD VENTING FOR TUESDAY: GOOD VENTING OUTLOOK WEDNESDAY THRU FRIDAY: FAIR TO GOOD VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/