FNUS73 KLOT 171329 FWSLOT SPOT FORECAST FOR FMA 12...FERMILAB NATIONAL WEATHER SERVICE CHICAGO IL 829 AM CDT WED MAR 17 2010 FORECAST IS BASED ON IGNITION TIME OF 1300 CDT ON MARCH 17. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...DENSE FOG...MAINLY WEST OF THE FOX RIVER...WILL BURN OFF THIS MORNING LEAVING MOSTLY SUNNY SKIES ACROSS THE REGION BY THIS AFTERNOON. IT WILL BE ANOTHER MILD DAY WITH HIGHS CLIMBING INTO THE LOWER 60S. WITH THE REGION UNDER A WEAK RIDGE OF HIGH PRESSURE...LOW LEVEL WINDS WILL BE RATHER LIGHT THROUGH THE DAY. A STRONG SUBSIDENCE INVERSION UP TO AROUND 1500 FEET WILL LIMIT MIXING UNTIL THE SURFACE TEMPERATURE RISES INTO THE MIDDLE 50S... WHICH WILL NOT OCCUR UNTIL EARLY THIS AFTERNOON. .TODAY... SKY/WEATHER.........SUNNY. TEMPERATURE.........58 AT IGNITION...MAX 63. MIN HUMIDITY........30 PERCENT AT IGNITION...MIN 29 PERCENT. WIND (20 FT)........WINDS NORTH AT 5 MPH AT IGNITION...OTHERWISE LIGHT WINDS BECOMING NORTH AROUND 5 MPH...THEN BECOMING LIGHT. MIXING HEIGHT.......300 FT AGL INCREASING TO 800 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 1400 FT AGL IN THE MORNING INCREASING TO 2100 FT AGL LATE IN THE MORNING INCREASING TO 2800 FT AGL INCREASING TO 3800 FT AGL AT IGNITION...OTHERWISE 3400-3800 FT AGL INCREASING TO 3800-4000 FT AGL DECREASING TO 3200-3500 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 7 TO 9 MPH. SMOKE DISPERSAL.....POOR /28700 KNOT-FT/ AT IGNITION. MAX...POOR /29100 KNOT-FT/. TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........5 4 4 4 3 3 WEATHER COV..... WEATHER TYPE.... TEMP............58 60 62 62 61 59 RH..............30 29 30 33 37 43 20 FT WIND DIR..020 020 030 040 050 060 20 FT WIND SPD..4 4 3 2 2 2 20 FT WIND GUST.5 5 5 5 5 5 MIX HGT (KFT)...3.8 4.0 3.9 3.8 3.5 3.2 TRANSP WIND DIR.010 010 000 350 340 330 TRANSP WIND SPD.9 8 8 7 7 7 VRATE KT-FT/100029 29 28 26 24 21 $$ FORECASTER...KREIN REQUESTED BY...SHEMANSKE TYPE OF REQUEST...PRESCRIBED .TAG 20100317.FMA12.01/LOT