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If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 031432 SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF ENVIRONMENT CANADA AT 8:00 AM PDT SATURDAY 3 MAY 1997 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 12 200 10 100 17 4000 13 KAMLOOPS KEL 32 13 600 10 100 16 4000 13 OKANAGAN KEL 32 13 600 10 100 16 4000 13 CASTLEGAR SPOK 21 10 800 4 100 14 4000 13 CRANBROOK SPOK 9 8 950 22 60 13 1700 12 REVELSTOKE KEL 9 8 450 10 100 14 2100 12 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON SW 11 SW 20 SW 28 CRANBROOK SW 13 SW 37 INVERSION HT BREAKTHRU TEMP KELOWNA 700 m 13 C SPOKANE 1100 m 13 C TODAY'S VENTING: A COLD FRONT WILL MOVE EASTWARD ACROSS THE INTERIOR TODAY. THE AIRMASS WILL BECOME UNSTABLE IN THE WAKE OF THE FRONT. THEREFORE GOOD VENTING IS EXPECTED THIS AFTERNOON. VENTING FOR SUNDAY: GOOD. VENTING OUTLOOK MONDAY THRU WEDNESDAY: REMAINING GOOD DUE TO AN UNSTABLE AIRMASS. 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. 40 9 1300 12 100 14 4000 10 PR. GEORGE P.G. 20 10 800 5 100 13 4000 10 SMITHERS P.G. 20 10 700 4 100 12 4000 10 WELLS GRAY P.G. 40 7 1400 12 100 10 4000 10 FT NLSN F.N. 14 7 550 3 72 14 2850 4 FT STJOHN F.N. 30 7 1450 3 86 14 3700 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 SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE S 17 SW 24 SMITHERS SW 19 SW 24 INVERSION HT BREAKTHRU TEMP PR. GEORGE MISSING FT. NELSON 700 m 11 C TODAY'S VENTING: A COLD FRONT ALONG THE COAST WILL MOVE NORTHEASTWARD AND END UP LYING THROUGH JUST NORTH OF SMITHERS AND JUST NORTH OF PRINCE GEORGE. THE AIRMASS BECOMES UNSTABLE TO THE SOUTH OF THE FRONT. GOOD VENTING IS EXPECTED THIS AFTERNOON OVER ALL AREAS EXCEPT FOR NORTH OF THE FRONT OVER THE CENTRAL INTERIOR WHERE THE VENTING WILL BE FAIR. VENTING FOR SUNDAY: GOOD. VENTING OUTLOOK MONDAY THRU WEDNESDAY: GOOD DUE TO AN UNSTABLE AIRMASS. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 100 12 2000 23 100 14 3000 25 FRASER VLY QUIL 100 13 2000 24 100 14 3000 24 SRN VRISL QUIL 100 11 2000 13 100 14 3000 21 CNTRL VRISL QUIL 100 9 2000 6 100 10 3000 6 NRN VRISL HRDY 100 8 2000 4 100 12 3000 21 TERRACE ANT 100 11 1100 21 100 13 3000 19 STEWART ANT 9 9 0 10 100 13 3000 19 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER S 28 S 35 SW 41 PORT HARDY S 30 S 37 S 39 SANDSPIT S 31 S 35 S 37 INVERSION HT BREAKTHRU TEMP QUILLAYUTE NONE m ## C PORT HARDY NONE m ## C ANNETTE NONE m ## C TODAY'S VENTING: THE AIRMASS WILL BE VERY UNSTABLE TODAY. THUS VENTING WILL BE GOOD. VENTING FOR SUNDAY: GOOD. VENTING OUTLOOK MONDAY THRU WEDNESDAY: CONTINUING GOOD. VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/JDG -------------------------------------------------- Special Industry Related Information -------------------------------------------------- 1 - Smoke Forecast, Coast 2 - Smoke Forecast, Interior Q - Return to Previous menu -------------------------------------------------- l Previous usage time: 51:04:03 This session: 00:01:20 --------Total Usage time: 51:05:23 Today's usage time: 00:05:22 This month's usage time: 00:13:24 ----This account expires: 12/31/97