FNUS73 KILX 091459 FWSILX Spot Forecast for Newton Lake RX...IDNR National Weather Service Lincoln IL 959 AM CDT Thu Apr 9 2026 Forecast is based on ignition time of 1000 CDT on April 09. If conditions become unrepresentative...contact the National Weather Service. Please contact our office at (217) 732-3089 if you have questions or concerns with this forecast. .DISCUSSION... A slow moving cold front will bring scattered showers and a few thunderstorms north of the I-72 corridor today. As the front sinks southward, showers will become more widespread across all of central and southeast Illinois by Friday. Southwest winds will gust 25 to 30 mph southeast of the I-55 corridor today, leading to excellent ventilation. As mixing heights lower and winds decrease substantially, ventilation will become poor by Friday. .REST OF TODAY... Sky/weather.........Sunny (10-20 percent). Chance of pcpn......0 percent. Chance of thunder...2 percent. Temperature.........66 at ignition...Max 78. RH..................52 percent at ignition...Min 33 percent. Wind (20 ft)........Winds southwest at 16 mph at ignition...otherwise Southwest winds 9 to 14 mph with gusts to around 29 mph. Mixing height.......1700 ft AGL at ignition...otherwise 6400 ft AGL. Transport winds.....Southwest 18 to 26 mph. Smoke dispersal.....Poor /38100 knot-ft/ at ignition. Max...Very Good /111500 knot-ft/. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........29 30 22 13 8 4 6 8 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 Temp............66 69 72 74 76 77 78 76 RH..............52 47 43 39 37 35 33 36 20 FT wind dir..SW SW SW SW SW SW SW SW 20 FT wind spd..16 16 16 16 16 14 14 14 20 FT wind gust.29 29 26 26 26 23 23 23 Mix hgt (kft)...1.7 2.4 3.1 3.8 5.4 6.2 6.4 5.4 Transp wind dir.SW SW SW SW SW SW SW S Transp wind spd.25 26 26 25 23 21 20 18 Vrate kt-ft/1K..38 55 71 84 107 112 108 87 Ventrate Cat....PR FR GD GD VGD VGD VGD GD .TONIGHT... Sky/weather.........Partly cloudy (20-30 percent). Chance of pcpn......10 percent. Chance of thunder...7 percent. Temperature.........Min 56. RH..................Max 72 percent. Wind (20 ft)........South winds 7 to 8 mph. Mixing height.......400 ft AGL. Transport winds.....South 14 to 20 mph. Smoke dispersal.....Poor (5800 knot-ft). TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........8 9 10 12 14 15 16 21 30 39 44 34 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 10 10 10 10 10 Chc of thdr (%).0 0 0 0 0 0 0 10 10 10 10 10 Temp............75 70 66 64 63 61 60 59 59 58 57 57 RH..............37 46 52 56 60 65 62 64 64 67 67 67 20 FT wind dir..S S S S S S S S S SW SW SW 20 FT wind spd..10 10 10 9 9 9 10 10 10 10 10 10 20 FT wind gust.20 20 20 17 17 17 20 20 20 20 20 20 Mix hgt (kft)...0.9 0.5 0.4 0.5 0.4 0.5 0.5 0.5 0.6 0.6 0.5 0.6 Transp wind dir.S S S S S S S S SW SW SW SW Transp wind spd.16 14 15 17 18 20 18 20 20 20 20 20 Vrate kt-ft/1K..13 6 6 7 7 9 8 9 9 9 9 9 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR .FRIDAY... Sky/weather.........Partly sunny (60-70 percent). Slight chance of rain showers in the morning. Rain showers likely and slight chance of thunderstorms in the afternoon. Chance of pcpn......60 percent. Chance of thunder...20 percent. Temperature.........Max 72. RH..................Min 55 percent. Wind (20 ft)........Southwest winds 8 to 10 mph shifting to the northwest 7 to 8 mph late in the afternoon. Gusty and erratic winds expected near thunderstorms in the afternoon. Mixing height.......3100 ft AGL. Transport winds.....Southwest 18 to 24 mph shifting to the northwest 13 to 17 mph late in the afternoon. Smoke dispersal.....Poor (10100 knot-ft) early in the morning increasing to Fair (50400 knot-ft) in the afternoon. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........41 48 51 55 64 73 80 87 82 84 86 85 Weather cov..... SCH SCH SCH SCH SCH SCH LKY LKY LKY LKY LKY Weather type.... RW RW RW RW RW RW RW RW RW RW RW Tstm cov........ SCH SCH SCH SCH SCH Chc of pcpn (%).10 20 20 20 20 20 20 60 60 60 60 60 Chc of thdr (%).10 10 10 10 10 10 10 20 20 20 20 20 Temp............56 56 60 64 68 70 71 72 71 71 69 68 RH..............72 72 67 63 59 55 55 57 61 61 66 65 20 FT wind dir..SW SW SW SW SW SW W W W NW NW NW 20 FT wind spd..12 12 12 13 13 13 13 13 13 10 10 10 20 FT wind gust.21 21 21 22 22 22 21 21 21 17 17 17 Mix hgt (kft)...0.6 0.6 0.8 1.5 1.8 2.3 2.7 3.1 2.7 2.2 1.8 1.5 Transp wind dir.SW SW SW SW SW W W W W NW NW NW Transp wind spd.20 18 20 24 22 21 20 18 17 15 14 13 Vrate kt-ft/1K..10 10 14 31 34 41 46 50 40 30 21 16 Ventrate Cat....PR PR PR PR PR FR FR FR PR PR PR PR $$ Forecaster...NMA Requested by...Erik Esker Type of request...PRESCRIBED .TAG 2609815.0/ILX .DELDT 04/09/26 .FormatterVersion 2.0.0 .EMAIL erik.esker@illinois.gov