FNUS73 KLOT 171451 FWSLOT SPOT FORECAST FOR NELSON PILES...INDIANA DUNES NATIONAL LAKESHORE NATIONAL WEATHER SERVICE CHICAGO IL 951 AM CDT WED JUN 17 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON JUNE 17. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...WEAK LOW PRESSURE OVER NORTHERN INDIANA THIS MORNING WILL MOVE OFF TO THE EAST TODAY. SKIES WILL THEN BECOME PARTLY CLOUDY AS HIGH PRESSURE MOVES IN. ANOTHER LOW WILL MOVE FROM THE CENTRAL PLAINS NORTHEASTWARD TO THE UPPER MISSISSIPPI VALLEY THURSDAY. AS VERY WARM AND HUMID AIR SURGES NORTHWARD AHEAD OF THIS APPROACHING LOW...THUNDERSTORMS WILL RETURN TO THE REGION BY LATE THURSDAY NIGHT AND FRIDAY MORNING. .TODAY... SKY/WEATHER.........MOSTLY CLOUDY. AREAS OF FOG EARLY IN THE MORNING. TEMPERATURE.........68 AT IGNITION...MAX 80. RH..................81 PERCENT AT IGNITION...MIN 53 PERCENT. WIND (20 FT)........WINDS NORTHWEST AT 8 MPH AT IGNITION...OTHERWISE LIGHT WINDS BECOMING NORTH 5 TO 10 MPH. CHANCE OF PCPN......10 PERCENT. LAL.................NO TSTMS. MIXING HEIGHT.......300 FT AGL INCREASING TO 900 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 1700 FT AGL IN THE MORNING INCREASING TO 2600 FT AGL AT IGNITION...OTHERWISE 2600 FT AGL LATE IN THE MORNING INCREASING TO 3500 FT AGL INCREASING TO 4300 FT AGL INCREASING TO 4800 FT AGL INCREASING TO 5100 FT AGL EARLY IN THE AFTERNOON DECREASING TO 5000 FT AGL DECREASING TO 4700 FT AGL LATE IN THE AFTERNOON DECREASING TO 4400 FT AGL. TRANSPORT WINDS.....WEST 9 TO 16 MPH INCREASING TO NORTHWEST 20 TO 25 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....FAIR /53900 KNOT-FT/ AT IGNITION. MAX...VERY GOOD /105800 KNOT-FT/. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........83 81 78 76 73 71 68 66 63 WEATHER COV..... WEATHER TYPE.... TEMP............68 72 75 79 79 79 80 79 78 RH..............81 72 64 56 56 55 53 54 57 20 FT WIND DIR..310 310 310 310 320 340 350 340 340 20 FT WIND SPD..6 7 8 8 8 7 6 6 6 20 FT WIND GUST. 10 10 10 10 10 10 10 MIX HGT (KFT)...2.6 3.5 4.3 4.8 5.1 5.1 5.0 4.7 4.4 TRANSP WIND DIR.270 280 290 290 290 300 310 320 320 TRANSP WIND SPD.16 20 22 24 25 25 25 24 23 CWR.............10 10 10 10 10 10 10 10 10 LAL.............1 1 1 1 1 1 1 1 1 VRATE KT-FT/100054 73 90 102 106 105 101 94 86 .TONIGHT... CHANCE OF PCPN......10 PERCENT. SMOKE DISPERSAL.....POOR TO GOOD (2800-75600 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM CWR.............10 10 10 10 10 10 10 10 10 10 10 10 VRATE KT-FT/100076 65 53 41 28 18 9 5 3 3 4 6 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. TEMPERATURE.........MAX 79. RH..................MIN 57 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 7 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. CHANCE OF PCPN......30 PERCENT. MIXING HEIGHT.......1200 FT AGL INCREASING TO 1400 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 1600 FT AGL IN THE MORNING INCREASING TO 1800 FT AGL LATE IN THE MORNING INCREASING TO 2000 FT AGL INCREASING TO 2200 FT AGL DECREASING TO 2100 FT AGL DECREASING TO 1900 FT AGL DECREASING TO 1700 FT AGL DECREASING TO 1400 FT AGL LATE IN THE AFTERNOON DECREASING TO 1100 FT AGL. TRANSPORT WINDS.....SOUTHEAST 8 TO 17 MPH INCREASING TO AROUND 20 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR (8100-19800 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........67 67 68 68 68 68 69 71 73 74 76 78 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............62 66 69 72 74 76 78 78 78 79 78 77 RH..............83 75 68 64 61 60 57 58 58 58 60 63 20 FT WIND DIR..050 080 140 170 160 140 130 130 140 140 140 150 20 FT WIND SPD..2 2 3 3 3 4 4 5 5 5 6 6 20 FT WIND GUST.5 5 10 10 10 10 10 15 15 15 15 15 MIX HGT (KFT)...1.2 1.4 1.6 1.8 2.0 2.2 2.2 2.1 1.9 1.7 1.4 1.1 TRANSP WIND DIR.040 050 070 090 110 130 140 140 140 140 150 150 TRANSP WIND SPD.8 8 8 8 8 9 10 12 14 16 17 20 CWR.............20 20 20 20 20 20 40 40 40 40 40 40 VRATE KT-FT/10008 10 12 14 16 18 19 20 20 19 18 17 $$ FORECASTER...BRUMER REQUESTED BY...MARYELLEN LOTHSCHUTZ TYPE OF REQUEST...PRESCRIBED .TAG 20090617.NELSO.01/LOT