FNUS73 KLOT 241247 FWSLOT SPOT FORECAST FOR DUNE RIDGE RX...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE CHICAGO IL 747 AM CDT FRI APR 24 2009 FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON APRIL 24. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WEAK AREA OF LOW PRESSURE ASSOCIATED WITH A SMALL MID LEVEL DISTURBANCE OVER THE GREAT LAKES AREA WILL DISSIPATE THIS MORNING...WHILE A STRONGER AREA OF LOW PRESSURE PASSES TO THE NORTH ACROSS THE UPPER MIDWEST. THIS WILL RESULT IN SOUTH WINDS INCREASING ACROSS THE MIDWEST...PUSHING TEMPERATURES INTO THE 80S. A COLD FRONT WILL SAG ACROSS THE UPPER MIDWEST BEHIND THIS AREA OF LOW PRESSURE TONIGHT AND MOVE INTO NORTHERN ILLINOIS AND FAR NORTHWEST INDIANA BY SATURDAY EVENING. THIS WILL BRING COOLER TEMPERATURES AND THE THREAT OF SCATTERED THUNDERSTORMS TO PORTIONS OF THE AREA. THE FRONT WILL THEN STALL ACROSS THE AREA SATURDAY NIGHT BEFORE LIFTING BACK NORTH AS A WARM FRONT ON SUNDAY IN RESPONSE TO DEEPER LOW PRESSURE DEVELOPING ACROSS THE PLAINS. .TODAY... SKY/WEATHER.........MOSTLY SUNNY. TEMPERATURE.........70 AT IGNITION...MAX 77. RH..................51 PERCENT AT IGNITION...MIN 44 PERCENT. WIND (20 FT)........WINDS SOUTHWEST AT 15 MPH AT IGNITION...OTHERWISE SOUTH WINDS 13 TO 17 MPH. GUSTS UP TO 30 MPH IN THE AFTERNOON. NO LAKE EFFECT WINDS TODAY AS STRONG SOUTH TO SOUTHWEST FLOW WILL KEEP THEM AT BAY. CHANCE OF PCPN......0 PERCENT. MIXING HEIGHT.......300 FT AGL INCREASING TO 500 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 700 FT AGL EARLY IN THE MORNING INCREASING TO 900 FT AGL LATE IN THE MORNING INCREASING TO 1000 FT AGL AT IGNITION...OTHERWISE 1000 FT AGL INCREASING TO 1200 FT AGL LATE IN THE MORNING INCREASING TO 1300 FT AGL INCREASING TO 1600 FT AGL EARLY IN THE AFTERNOON INCREASING TO 1900 FT AGL INCREASING TO 2100 FT AGL LATE IN THE AFTERNOON DECREASING TO 2000 FT AGL. TRANSPORT WINDS.....SOUTH 29 TO 38 MPH. SMOKE DISPERSAL.....POOR /25300 KNOT-FT/ AT IGNITION. MAX...GOOD /66400 KNOT-FT/. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........20 20 20 19 17 16 19 23 WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF WEATHER TYPE....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ TEMP............70 73 73 76 76 76 76 75 RH..............51 48 49 44 45 44 44 44 20 FT WIND DIR..210 210 220 210 210 210 200 200 20 FT WIND SPD..12 12 13 13 14 14 14 14 20 FT WIND GUST.25 25 25 30 30 30 30 30 MIX HGT (KFT)...1.0 1.2 1.3 1.6 1.9 2.1 2.1 2.0 TRANSP WIND DIR.210 210 220 210 210 200 200 200 TRANSP WIND SPD.30 31 33 35 36 37 38 38 CWR.............0 0 0 0 0 0 0 0 VRATE KT-FT/100025 28 33 43 54 62 66 66 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. HAZE. TEMPERATURE.........MIN 61. RH..................MAX 74 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 16 TO 17 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......1800 FT AGL DECREASING TO 1300 FT AGL EARLY IN THE EVENING...THEN DECREASING TO 700 FT AGL EARLY IN THE EVENING DECREASING TO 300 FT AGL LATE IN THE EVENING DECREASING TO 100 FT AGL INCREASING TO 200 FT AGL LATE IN THE EVENING INCREASING TO 300 FT AGL DECREASING TO 200 FT AGL AFTER MIDNIGHT INCREASING TO 300 FT AGL DECREASING TO 200 FT AGL EARLY IN THE MORNING INCREASING TO 300 FT AGL. TRANSPORT WINDS.....SOUTHWEST 36 TO 39 MPH. SMOKE DISPERSAL.....POOR TO FAIR (4600-59900 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........26 29 33 36 39 43 46 46 47 47 47 48 WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF WEATHER TYPE....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ TEMP............73 71 69 67 66 65 64 63 63 62 62 62 RH..............47 52 55 59 62 64 66 68 69 71 73 74 20 FT WIND DIR..190 200 200 200 200 210 210 210 210 210 210 210 20 FT WIND SPD..14 14 14 14 14 14 13 13 13 13 13 13 20 FT WIND GUST.30 30 30 30 30 25 25 25 25 25 25 25 MIX HGT (KFT)...1.8 1.3 0.7 0.3 0.1 0.2 0.3 0.2 0.2 0.3 0.2 0.3 TRANSP WIND DIR.200 200 200 200 200 210 210 210 210 210 210 210 TRANSP WIND SPD.39 39 39 39 39 39 38 38 38 38 37 36 CWR.............10 10 10 10 10 10 10 10 10 10 10 10 VRATE KT-FT/100060 44 24 9 5 6 8 8 8 8 8 8 .SATURDAY... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING PARTLY SUNNY. HAZE THROUGH THE DAY. TEMPERATURE.........MAX 76. RH..................MIN 44 PERCENT. WIND (20 FT)........WEST WINDS 10 TO 17 MPH WITH GUSTS TO AROUND 30 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. CHANCE OF PCPN......20 PERCENT. MIXING HEIGHT.......400 FT AGL INCREASING TO 600 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 800 FT AGL EARLY IN THE MORNING INCREASING TO 1200 FT AGL LATE IN THE MORNING INCREASING TO 1900 FT AGL INCREASING TO 2600 FT AGL LATE IN THE MORNING INCREASING TO 3200 FT AGL INCREASING TO 3700 FT AGL EARLY IN THE AFTERNOON INCREASING TO 4000 FT AGL INCREASING TO 4100 FT AGL LATE IN THE AFTERNOON DECREASING TO 3800 FT AGL DECREASING TO 3400 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 36 TO 41 MPH BECOMING WEST 21 TO 29 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO VERY GOOD (11900-139900 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........48 50 53 55 57 60 62 64 67 69 71 74 WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF WEATHER TYPE....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ TEMP............62 65 67 70 72 73 74 75 75 75 75 73 RH..............73 67 63 58 54 51 51 47 45 44 44 46 20 FT WIND DIR..210 210 210 210 220 220 220 230 240 260 270 290 20 FT WIND SPD..13 13 14 14 14 14 14 14 13 11 10 8 20 FT WIND GUST.30 30 30 30 30 30 30 30 25 25 20 15 MIX HGT (KFT)...0.4 0.6 0.8 1.2 1.9 2.6 3.2 3.7 4.0 4.1 3.8 3.4 TRANSP WIND DIR.210 210 220 220 220 230 230 230 240 240 260 300 TRANSP WIND SPD.36 37 38 39 40 41 41 41 39 37 29 21 CWR.............10 10 10 10 10 10 20 20 20 20 20 20 VRATE KT-FT/100012 18 27 42 66 93 116 132 140 134 104 66 $$ FORECASTER...BRUMER REQUESTED BY...NEAL MULCONREY TYPE OF REQUEST...PRESCRIBED .TAG 20090424.DUNER.01/LOT