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If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 151455 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 15 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 23 14 650 0 82 18 1650 8 KAMLOOPS KEL 58 14 900 11 100 19 2500 8 OKANAGAN KEL 31 13 750 0 90 18 2250 7 CASTLEGAR GEG 9 11 500 12 58 14 950 15 CRANBROOK GEG 21 10 1000 16 57 13 1300 16 REVELSTOKE KEL 9 11 550 0 70 14 1200 11 *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 SW 9 SW 19 W 33 CRANBROOK SW 17 SW 43 INVERSION HT BREAKTHRU TEMP KELOWNA 700 m 13 C SPOKANE 1280 m 16 C TODAY'S VENTING: BECOMING GOOD WITH AN UNSTABLE SOUTHWEST FLOW ALOFT AND SUNNY BREAKS PROVIDING INCREASED INSOLATED FURTHER DESTABILIZING THE AIRMASS. VENTING FOR THURSDAY: GOOD BY AFTERNOON AS THE AIRMASS CONTINUES TO BE UNSTABLE. VENTING OUTLOOK FRIDAY THROUGH SUNDAY: LITTLE CHANGE IN THE UNSTABLE PATTERN. VENTING WILL BE GENERALLY GOOD IN THE AFTERNOONS. 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. 68 7 1750 10 93 12 3950 5 PR. GEORGE P.G. 75 9 1650 10 88 13 2700 7 SMITHERS ANN 86 6 1550 12 100 13 3500 13 WELLS GRAY P.G. 74 9 2400 7 93 13 4000 5 FT NLSN F.N. 23 4 650 6 46 9 1650 4 FT STJOHN F.N. 23 5 1450 2 67 9 2500 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 PR. GEORGE S 19 S 24 SMITHERS SW 9 S 24 INVERSION HT BREAKTHRU TEMP PR. GEORGE NO INVERSION FT. NELSON 762 m 08 C TODAY'S VENTING: GOOD IN THE CENTRAL INTERIOR. ONLY FAIR TO GOOD IN NORTHEAST BC AS THE UNSTABLE AIR FROM THE SOUTHWEST DOESN'T QUITE MAKE IT INTO THE AREA TODAY. VENTING FOR THURSDAY: THE AIRMASS REMAINS UNSTABLE OVER THE CENTRAL INTERIOR AND THIS INSTABILITY WILL SPREAD INTO THE NORTHEAST RESULTING IN GENERALLY GOOD AFTERNOON VENTING EVERWHERE. VENTING OUTLOOK FRIDAY THROUGH SUNDAY: GENERALLY GOOD IN THE AFTERNOON WITH LITTLE CHANGE IN THE UNSETTLED UPPER PATTERN IN THE FORSEEABLE FUTURE. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 69 13 1150 8 77 16 1550 7 FRASER VLY QUIL 54 13 1150 5 68 17 1600 5 SRN VRISL QUIL 48 12 900 5 68 17 1550 5 CNTRL VRISL QUIL 17 9 350 3 63 15 1400 5 NRN VRISL HRDY 15 7 150 4 82 13 2050 6 TERRACE ANN 100 10 1750 12 100 15 3200 13 STEWART ANN 78 10 1100 10 100 15 2700 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 WEDNESDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER SW 19 SW 24 SW 28 PORT HARDY S 30 S 35 S 35 SANDSPIT S 39 S 37 S 39 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 200 m 7 C PORT HARDY 250 m 9 C ANNETTE NO INVERSION TODAY'S VENTING: BECOMING GOOD BY AFTERNOON. AN UPPER LOW OFFSHORE IN CONJUNCTION WITH SOME DAYTIME HEATING WILL KEEP THE AIRMASS UNSTABLE. VENTING FOR THURSDAY: FAIR TO GOOD IN THE MORNING. GOOD IN THE AFTERNOON. THE UPPER LOW WILL MAINTAIN UNSTABLE CONDITIONS. VENTING OUTLOOK FRIDAY THROUGH SUNDAY: THERE IS ALMOST NO MOVEMENT FORECAST FOR THE OFFSHORE UPPER LOW SO IT WILL CONTINUE SPINNING BANDS OF INSTABILITY ACROSS THE COAST AND RESULT IN GOOD AFTERNOON VENTING. VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/MWSO -------------------------------------------------- Special Industry Related Information -------------------------------------------------- 1 - Smoke Forecast, Coast 2 - Smoke Forecast, Interior Q - Return to Previous menu -------------------------------------------------- l Previous usage time: 21:19:55 This session: 00:01:21 --------Total Usage time: 21:21:16 Today's usage time: 00:01:21 This month's usage time: 01:34:51 ----This account expires: 12/31/96 NO CARRIER