FNUS73 KLOT 151339 FWSLOT SPOT FORECAST FOR ORIENTAL BITTERSWEET RESEARCH KEMIL...NPS NATIONAL WEATHER SERVICE CHICAGO IL 839 AM CDT THU APR 15 2010 FORECAST IS BASED ON IGNITION TIME OF 0930 CDT ON APRIL 15. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...UNSEASONABLY WARM CONDITIONS WILL CONTINUE TODAY IN ADVANCE OF A COLD FRONT THAT WILL APPROACH THE ILLINOIS WISCONSIN STATE LINE BY AROUND MIDNIGHT TONIGHT. SOUTHWEST WINDS WILL BE RATHER GUSTY TODAY IN ADVANCE OF THE FRONT. LOWER LEVELS OF THE ATMOSPHERE WILL REMAIN DRY TODAY AND THESE DRY CONDITIONS COMBINED WITH FORECAST HIGH TEMPERATURES FROM THE UPPER 70S WILL PRODUCE MINIMUM AFTERNOON RELATIVE HUMIDITY FROM 30 TO 35 PERCENT. LOCALIZED LOWER MINIMUM AFTERNOON RELATIVE HUMIDITY ARE POSSIBLE IF DRIER AIR IS ABLE TO MIX DOWN TO THE SURFACE. THE COLD FRONT WILL BRING INCREASING CHANCES OF SHOWERS AND THUNDERSTORMS TONIGHT ALONG WITH COOLER CONDITIONS FOR THE WEEKEND. .TODAY... SKY/WEATHER.........MOSTLY SUNNY. TEMPERATURE.........67 AT IGNITION...MAX 79. MIN HUMIDITY........57 PERCENT AT IGNITION...MIN 34 PERCENT. WIND (20 FT)........WINDS SOUTHWEST AT 9 MPH AT IGNITION...OTHERWISE SOUTHWEST WINDS 6 TO 12 MPH. GUSTS UP TO 25 MPH IN THE MORNING. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......500 FT AGL AT IGNITION...INCREASING TO 1500 FT AGL LATE IN THE MORNING...THEN INCREASING TO TO 4100 FT AGL EARLY IN THE AFTERNOON INCREASING TO 5800 FT AGL BY MID AFTERNOON...THEN DECREASING TO 4700 FT AGL DECREASING TO 3100 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 21 TO 30 MPH INCREASING TO 29 TO 31 MPH. SMOKE DISPERSAL.....POOR /10400 KNOT-FT/ AT IGNITION. MAX...EXCELLENT /164500 KNOT-FT/. TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........26 28 31 33 26 27 28 29 30 31 WEATHER COV..... WEATHER TYPE.... TEMP............64 67 71 75 77 78 79 79 78 77 RH..............57 51 45 39 37 35 34 34 35 36 20 FT WIND DIR..220 230 230 230 240 230 230 230 230 230 20 FT WIND SPD..6 7 8 9 10 10 10 10 9 9 20 FT WIND GUST.20 20 25 25 25 25 25 25 25 20 MIX HGT (KFT)...0.1 0.5 1.5 2.9 4.1 5.1 5.8 5.8 4.7 3.1 TRANSP WIND DIR.220 220 220 230 230 230 230 230 230 230 TRANSP WIND SPD.24 25 26 28 29 30 31 31 31 29 CWR.............0 0 0 0 10 10 10 10 10 10 VRATE KT-FT/10001 10 36 69 102 136 160 165 134 86 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. MIN TEMPERATURE.....55. MAX HUMIDITY........79 PERCENT. WIND (20 FT)........WEST WINDS 9 TO 11 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. CHANCE OF PCPN......40 PERCENT. MIXING HEIGHT.......1600 FT AGL DECREASING TO 100-300 FT AGL. TRANSPORT WINDS.....WEST 24 TO 28 MPH. TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........32 38 45 52 59 66 73 74 74 75 76 76 WEATHER COV.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC WEATHER TYPE....TSM TSM TSM TSM TSM TSM TSM TSM TSM TSM TSM TSM TEMP............75 72 70 67 65 63 62 60 59 58 57 56 RH..............38 42 46 52 57 61 66 69 71 74 76 79 20 FT WIND DIR..230 230 230 230 230 230 230 230 240 250 250 260 20 FT WIND SPD..9 9 9 9 9 9 9 8 8 8 7 7 20 FT WIND GUST.20 20 20 20 20 20 20 15 15 15 15 15 MIX HGT (KFT)...1.6 0.9 0.5 0.3 0.1 0.2 0.3 0.3 0.3 0.3 0.2 0.1 TRANSP WIND DIR.230 230 230 220 220 220 220 230 240 240 250 260 TRANSP WIND SPD.28 28 26 26 26 26 28 26 25 25 24 24 CWR.............20 20 20 20 20 20 50 50 50 50 50 50 .FRIDAY... SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. CHANCE OF RAIN SHOWERS IN THE MORNING. MAX TEMPERATURE.....59. MIN HUMIDITY........64 PERCENT. WIND (20 FT)........NORTHWEST WINDS 9 TO 11 MPH. CHANCE OF PCPN......30 PERCENT. MIXING HEIGHT.......300-700 FT AGL INCREASING TO 1200-1600 FT AGL IN THE MORNING...THEN INCREASING TO 1800-2200 FT AGL IN THE LATE MORNING AND AFTERNOON DECREASING TO 1600 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 20 TO 26 MPH. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........77 74 71 67 64 61 58 56 54 52 50 48 WEATHER COV.....CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW TEMP............55 56 57 58 59 59 58 58 58 57 56 54 RH..............81 82 81 80 79 78 76 73 69 66 64 64 20 FT WIND DIR..260 270 280 290 300 310 320 320 330 330 340 340 20 FT WIND SPD..7 7 7 8 8 8 9 9 9 9 9 9 20 FT WIND GUST.15 15 15 15 20 20 20 20 20 20 20 20 MIX HGT (KFT)...0.3 0.7 1.2 1.6 1.8 1.8 1.8 2.0 2.1 2.2 1.9 1.6 TRANSP WIND DIR.260 270 290 300 310 310 310 320 320 330 330 340 TRANSP WIND SPD.23 22 21 20 21 22 23 24 25 26 26 26 CWR.............30 30 30 30 30 30 20 20 20 20 20 20 $$ FORECASTER...KREIN REQUESTED BY...NEAL MULCONREY TYPE OF REQUEST...PRESCRIBED .TAG 20100415.ORIEN.01/LOT