FNUS73 KLSX 221155 FWSLSX SPOT FORECAST FOR MARK TWAIN LAKE...CORPS OF ENGINEERS NATIONAL WEATHER SERVICE ST LOUIS MO 655 AM CDT THU APR 22 2010 FORECAST IS BASED ON IGNITION TIME OF 0930 CDT ON APRIL 22. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... THE THREAT FOR SHOWERS AND THUNDERSTORMS WILL RETURN TO THE BI-STATE REGION BEGINNING TODAY AND CONTINUING THROUGH SUNDAY NIGHT AS A SLOW MOVING STORM SYSTEM MOVES EASTWARD INTO THE PLAINS TONIGHT AND EVENTUALLY THROUGH MISSOURI AND ILLINOIS SATURDAY NIGHT AND SUNDAY. THE GREATEST RAIN THREAT TODAY WILL BE OVER CENTRAL AND SOUTHEAST MISSOURI...WITH THIS THREAT SPREADING NORTH AND NORTHEAST TONIGHT AS A WARM FRONT LIFTS SLOWLY NORTH NORTHEASTWARD THROUGH THE AREA. A SOUTH OR SOUTHEAST WIND CAN BE EXPECTED TODAY THROUGH FRIDAY. .TODAY... SKY/WEATHER.........PARTLY SUNNY THEN BECOMING MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. CWR.................20 PERCENT. LAL.................NO TSTMS UNTIL 1300...THEN 1-8 STRIKES. TEMPERATURE.........60 AT IGNITION...MAX 72. MIN HUMIDITY........67 PERCENT AT IGNITION...MIN 42 PERCENT. WIND...EYE LEVEL....WINDS SOUTHEAST AT 3 MPH AT IGNITION... BECOMING SOUTH AT 4 MPH IN THE LATE MORNING AND AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. WIND...20 FT........WINDS SOUTHEAST AT 6 MPH AT IGNITION... BECOMING SOUTH 7 TO 9 MPH IN THE LATE MORNING AND AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AT IGNITION... 6400 FT AGL AT MAX HEATING. TRANSPORT WINDS.....SOUTHEAST AROUND 8 MPH. VENTILATION RATE....FAIR (6991 M 2/S) AT MAX HEATING. $$ FORECASTER...GKS REQUESTED BY...ALLEN MEHRER TYPE OF REQUEST...PRESCRIBED .TAG 20100422.MARKT.01/LSX