FNUS73 KLOT 231951 FWSLOT SPOT FORECAST FOR CHICAGO ROAD SEED BEDS...USDA FOREST SERVICE NATIONAL WEATHER SERVICE CHICAGO IL 251 PM CDT FRI MAR 23 2012 FORECAST IS BASED ON IGNITION TIME OF 1500 CDT ON MARCH 23. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... LIGHT NORTHEAST TO SOUTHEAST WINDS WILL CONTINUE TODAY AND THEN BECOME LIGHT AND VARIABLE OVERNIGHT AS THE UPPER LEVEL LOW PASSES THROUGH SOUTHERN ILLINOIS TONIGHT. 20 FT WINDS WILL BE 10 MPH OR LESS TODAY. HOWEVER...AS A BAND OF CLEAR SKIES OVER CENTRAL ILLINOIS MOVES NORTHWARD...EXPECTING ADDITIONAL THUNDERSTORM DEVELOPMENT TO OCCUR ACROSS NORTHEASTERN ILLINOIS. SOME OF THESE STORMS MAY BE SEVERE...AND ANY THUNDERSTORM MAY PRODUCE HEAVY RAIN. 1700FT MIXING TEMP FOR TODAY IS 66 DEGREES AND 62 DEGREES FOR TOMORROW. .REST OF TODAY... SKY/WEATHER.........SHOWERS AND THUNDERSTORMS LIKELY THROUGH THE AFTERNOON. TEMPERATURE.........66 AT IGNITION...MAX 68. RH..................75 PERCENT AT IGNITION...MIN 73 PERCENT. WIND (20 FT)........WINDS SOUTHEAST AT 5 MPH AT IGNITION...OTHERWISE SOUTHEAST WINDS AROUND 5 MPH BECOMING LIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE AFTERNOON. CHANCE OF PCPN......70 PERCENT. LAL.................16-25 STRIKES. MIXING HEIGHT.......6900 FT AGL AT IGNITION...OTHERWISE 6900-7100 FT AGL DECREASING TO 2500 FT AGL. TRANSPORT WINDS.....SOUTHEAST 9 TO 12 MPH. SMOKE DISPERSAL.....GOOD /78600 KNOT-FT/ AT IGNITION. MAX...GOOD /78600 KNOT-FT/. TIME (CDT) 3PM 4PM 5PM 6PM SKY (%).........72 73 73 73 WEATHER COV.....LKY LKY LKY LKY WEATHER TYPE....RW RW RW RW TEMP............66 66 65 63 RH..............75 73 75 81 20FT WIND DIR...120 110 120 130 20FT SPEED(MPH).4 4 4 3 20FT SPEED(KT)..3 3 3 3 20FT GUST(MPH)..6 6 6 6 20FT GUST(KT)...5 5 5 5 MIX HGT (KFT)...6.9 7.1 4.8 2.5 TRANSP WIND DIR.110 120 120 130 TRANSP WIND SPD.12 12 10 9 CWR.............60 70 70 70 LAL.............4 4 4 4 VRATE KT-FT/100079 73 52 24 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS EARLY IN THE EVENING. CHANCE OF RAIN SHOWERS THROUGH THE NIGHT. ISOLATED THUNDERSTORMS LATE IN THE EVENING. TEMPERATURE.........MIN 53. RH..................MAX 96 PERCENT. WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE EVENING. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE EVENING. CHANCE OF PCPN......50 PERCENT. LAL.................9-15 STRIKES. MIXING HEIGHT.......300-500 FT AGL INCREASING TO 800 FT AGL EARLY IN THE MORNING. TRANSPORT WINDS.....NORTH 2 TO 7 MPH. SMOKE DISPERSAL.....POOR (0-1900 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........73 73 72 72 74 75 77 76 76 75 77 79 WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW TEMP............62 60 59 58 57 57 56 56 55 54 54 53 RH..............84 87 87 86 86 86 90 90 90 93 93 96 20FT WIND DIR...130 140 150 150 160 170 180 190 210 230 260 280 20FT SPEED(MPH).3 3 2 2 2 2 1 1 1 2 2 2 20FT SPEED(KT)..3 3 2 2 1 1 1 1 1 1 1 1 20FT GUST(MPH)..6 6 5 5 3 3 2 2 2 20FT GUST(KT)...5 5 4 4 3 3 2 2 2 2 2 2 MIX HGT (KFT)...0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.5 0.8 TRANSP WIND DIR.130 140 140 140 150 150 160 140 090 070 050 010 TRANSP WIND SPD.7 7 6 5 3 2 2 2 2 2 2 2 CWR.............50 50 50 50 50 50 40 40 40 40 40 40 LAL.............3 3 3 3 3 3 1 1 1 1 1 1 VRATE KT-FT/10002 0 0 1 1 1 1 0 0 1 1 1 .SATURDAY... SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. CHANCE OF RAIN SHOWERS. TEMPERATURE.........MAX 70. RH..................MIN 65 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING NORTH AROUND 5 MPH LATE IN THE AFTERNOON. CHANCE OF PCPN......30 PERCENT. LAL.................NO TSTMS. MIXING HEIGHT.......1000 FT AGL INCREASING TO 1600 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 2100 FT AGL IN THE MORNING INCREASING TO 2600 FT AGL LATE IN THE MORNING INCREASING TO 3300 FT AGL INCREASING TO 4000 FT AGL INCREASING TO 4700-5100 FT AGL INCREASING TO 5500-5900 FT AGL DECREASING TO 4000 FT AGL DECREASING TO 2100 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHEAST 2 TO 10 MPH. SMOKE DISPERSAL.....POOR TO FAIR (1900-45800 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........81 78 75 73 70 67 64 64 64 65 65 65 WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW TEMP............53 55 58 61 63 65 67 68 69 69 68 66 RH..............96 93 86 81 78 73 70 68 66 66 65 70 20FT WIND DIR...290 310 350 010 020 020 020 020 020 030 020 020 20FT SPEED(MPH).2 2 2 2 2 2 2 2 3 3 3 4 20FT SPEED(KT)..1 1 1 1 1 2 2 2 3 3 3 3 20FT GUST(MPH).. 3 3 3 3 5 5 6 6 7 7 8 20FT GUST(KT)...2 3 3 3 3 4 4 5 5 6 6 7 MIX HGT (KFT)...1.0 1.6 2.1 2.6 3.3 4.0 4.7 5.1 5.5 5.9 4.0 2.1 TRANSP WIND DIR.350 350 010 010 020 030 030 030 030 030 030 030 TRANSP WIND SPD.2 2 3 5 6 6 7 7 8 9 10 10 CWR.............30 30 30 30 30 30 30 30 30 30 30 30 LAL.............1 1 1 1 1 1 1 1 1 1 1 1 VRATE KT-FT/10002 4 6 10 15 21 27 37 44 46 34 17 $$ FORECASTER...RATZER REQUESTED BY...JEFF MARTINA TYPE OF REQUEST...PRESCRIBED .TAG 20120323.CHICA.01/LOT