FNUS73 KILX 201413 FWSILX Spot Forecast for Mackinaw SFWA...Illinois DNR National Weather Service Lincoln IL 913 AM CDT Fri Mar 20 2026 Forecast is based on ignition time of 1000 CDT on March 20. 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... Dry and warm conditions are expected into this weekend. A weak cold front will push through central Illinois today. A modest SW wind around 5-10mph will be in place to begin the day, and winds will become NW behind the front. No precip is expected. RH values will generally bottom out around 40 percent this afternoon. South to southwest winds return Saturday. .REST OF TODAY... Sky/weather.........Partly sunny (45-55 percent). Chance of pcpn......0 percent. Chance of thunder...1 percent. Temperature.........59 at ignition...Max 74. RH..................67 percent at ignition...Min 43 percent. Wind (20 ft)........Winds west at 13 mph at ignition...otherwise West winds around 9 mph with gusts to around 24 mph shifting to the northwest 8 to 9 mph late in the afternoon. Mixing height.......900 ft AGL at ignition...otherwise 3300 ft AGL. Transport winds.....West 17 to 22 mph shifting to the northwest around 20 mph late in the afternoon. Smoke dispersal.....Poor /13800 knot-ft/ at ignition. Max...Fair /56600 knot-ft/. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........59 63 57 44 40 39 47 50 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............59 64 69 71 72 73 73 72 RH..............67 58 49 47 46 43 43 44 20 FT wind dir..W W W W W NW NW NW 20 FT wind spd..13 13 13 13 13 12 12 12 20 FT wind gust.24 24 22 22 22 17 17 17 Mix hgt (kft)...0.9 1.5 1.9 2.3 2.7 3.1 3.3 3.1 Transp wind dir.W W W W W NW NW NW Transp wind spd.17 22 20 18 17 18 20 20 Vrate kt-ft/1K..14 28 32 37 40 50 57 52 Ventrate Cat....PR PR PR PR FR FR FR FR .TONIGHT... Sky/weather.........Partly cloudy (40-50 percent) then becoming mostly cloudy (55-65 percent) then becoming partly cloudy (45-55 percent). Chance of pcpn......0 percent. Chance of thunder...2 percent. Temperature.........Min 43. RH..................Max 96 percent. Wind (20 ft)........North winds 5 to 7 mph shifting to the east around 5 mph overnight. Mixing height.......500 ft AGL. Transport winds.....North 13 to 16 mph shifting to the east 9 to 13 mph in the late evening and overnight. Smoke dispersal.....Poor (4200 knot-ft). TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........48 46 52 59 65 66 68 69 65 61 57 50 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............70 64 60 57 55 53 52 50 48 48 46 45 RH..............47 60 69 77 80 83 86 89 93 89 93 93 20 FT wind dir..N N N NE NE NE NE NE NE E E E 20 FT wind spd..9 9 9 7 7 7 6 6 6 6 6 6 20 FT wind gust.16 16 16 14 14 14 13 13 13 12 12 12 Mix hgt (kft)...1.9 0.6 0.7 0.6 0.6 0.5 0.5 0.5 0.6 0.6 0.6 0.6 Transp wind dir.N N N N NE NE E E E E E E Transp wind spd.16 13 14 13 13 12 10 9 10 10 10 10 Vrate kt-ft/1K..27 7 8 6 6 5 5 4 5 5 6 6 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR $$ Forecaster...Deubelbeiss Requested by...Greg Fretueg Type of request...PRESCRIBED .TAG 2606786.0/ILX .DELDT 03/20/26 .FormatterVersion 2.0.0 .EMAIL gregory.fretueg@illinois.gov