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If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 011437 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 WEDNESDAY 1 MAY 1996 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 83 11 1350 10 100 16 3200 8 KAMLOOPS KEL 92 11 2200 8 100 16 3350 8 OKANAGAN KEL 92 11 2200 8 100 17 3350 8 CASTLEGAR GEG 78 6 1200 15 100 16 3500 29 CRANBROOK GEG 70 8 1500 15 100 13 3950 31 REVELSTOKE KEL 61 8 1100 10 100 14 3450 8 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON VR 5 W 13 W 17 CRANBROOK VR 5 W 13 INVERSION HT BREAKTHRU TEMP KELOWNA NONE N/A SPOKANE NONE N/A TODAY'S VENTING: AIR MASS IS UNSTABLE WITH GOOD MIXING POTENTIAL. VENTING FOR THURSDAY: GOOD VENTING OUTLOOK FRIDAY THRU SUNDAY: UPPER TROUGH IS MOVING INTO THE AREA AND FURTHER DESTABILIZING THE AIRMASS. VENTING WILL BE GOOD ALL THREE DAYS. 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. 61 4 1600 11 100 10 3950 12 PR. GEORGE P.G. 32 3 950 10 100 10 3700 11 SMITHERS ANN 23 3 1100 3 72 9 2900 4 WELLS GRAY P.G. 89 4 2250 11 100 12 4000 12 FT NLSN F.N. 31 5 650 8 68 8 1350 8 FT STJOHN F.N. 44 4 1100 10 90 8 2250 9 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE VR 5 VR 5 SMITHERS VR 5 VR 5 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1100 m 5 C FT. NELSON NONE N/A TODAY'S VENTING: POOR OVER THE AREA FROM QUESNEL NORTH UNTIL THE INVERSION BREAKS DOWN THEN GOOD VENTING. GOOD VENTING GOOD THROUGHOUT THE DAY OVER THE AREA SOUTH OF QUESNEL. VENTING FOR THURSDAY: GOOD VENTING OUTLOOK FRIDAY THRU SUNDAY: UPPER TROUGH IS MOVING INTO THE AREA AND FURTHER DESTABILIZING THE AIRMASS. VENTING WILL BE GOOD ALL THREE DAYS EXCEPT FOR MORNING INVERSIONS. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 100 10 1650 12 100 13 2150 12 FRASER VLY QUIL 95 10 1600 10 100 15 2500 10 SRN VRISL QUIL 28 8 350 6 100 14 2250 10 CNTRL VRISL QUIL 78 9 1150 9 100 13 2100 10 NRN VRISL HRDY 64 7 800 9 100 11 2150 10 TERRACE ANN 59 7 1800 4 79 12 2900 4 STEWART ANN 35 7 650 5 72 12 2400 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 WEDNESDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER SW 19 W 22 W 26 PORT HARDY W 17 W 15 W 15 SANDSPIT NW 15 NW 11 VR 5 INVERSION HT BREAKTHRU TEMP QUILLAYUTE NONE N/A PORT HARDY NONE N/A ANNETTE 100 m 5 C TODAY'S VENTING: AIR MASS IS THROUGHLY DESTABILIZED WHICH WILL GIVE GOOD VENTING. SOME LOW LEVEL INVERSION WILL OCCUR IN COASTAL VALLEYS MAKING VENTING POOR INITIALLY IN THE MORNING BUT BREAKTHROUGH TEMPERATURES ARE LOW. VENTING FOR THURSDAY: GOOD VENTING OUTLOOK FRIDAY THRU SUNDAY: UPPER TROUGH IS MOVING INTO THE AREA AND FURTHER DESTABILIZING THE AIRMASS. VENTING WILL BE GOOD ALL THREE DAYS. VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/JEM -------------------------------------------------- Special Industry Related Information -------------------------------------------------- 1 - Smoke Forecast, Coast 2 - Smoke Forecast, Interior Q - Return to Previous menu -------------------------------------------------- l Previous usage time: 19:50:32 This session: 00:01:21 --------Total Usage time: 19:51:53 Today's usage time: 00:05:28 This month's usage time: 00:05:28 ----This account expires: 12/31/96 NO CARRIER