FNUS73 KILX 281332 FWSILX Spot Forecast for Trelease (East Old Prairie Unit)...INHS/UIUC National Weather Service Lincoln IL 832 AM CDT Thu Mar 28 2024 Forecast is based on ignition time of 1000 CDT on March 28. 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... Deep mixing combined with west-southwesterly winds of 10-15 mph should result in good vent rates this afternoon. Much of today will be dry, although there is a low chance (15%) of a shower this evening. .REST OF TODAY... Sky/weather.........Sunny (15-25 percent) then becoming partly sunny (55-65 percent). Chance of pcpn......10 percent. LAL.................1. Temperature.........45 at ignition...Max 59. RH..................53 percent at ignition...Min 37 percent. Wind (20 ft)........Winds southwest at 10 mph at ignition...otherwise Southwest winds 7 to 15 mph. Haines Index........4 or low potential for large plume dominated fire growth at ignition...max 4. Mixing height.......1900 ft AGL at ignition...otherwise 6300 ft AGL. Transport winds.....Southwest 10 to 14 mph increasing to west 20 to 26 mph in the afternoon. Smoke dispersal.....Poor /17400 knot-ft/ at ignition. Max...Very Good /109400 knot-ft/ increasing to Very Good (123500 knot-ft) late in the afternoon. TIME (CDT) 10 AM NOON 2 PM 4 PM Sky (%).........20 32 4 38 Weather cov.....M M M M Weather type....M M M M Tstm cov........M M M M Chc of pcpn (%).0 0 0 0 LAL.............1 1 1 1 Temp............45 51 57 59 RH..............53 44 38 37 20 ft wind......SW 10 SW 17 SW 17 W 18 20 ft wind gust.16 24 24 25 Mix hgt (ft)....1900 3700 5200 6300 Transport wind..SW 10 W 20 W 24 W 26 Haines index....4 4 4 4 Vrate kt-ft/1K..17 64 109 145 Ventrate Cat....POOR GOOD VYGD VYGD .TONIGHT... Sky/weather.........Mostly cloudy (55-65 percent) then becoming partly cloudy (40-50 percent) then becoming mostly cloudy (50-60 percent) then becoming partly cloudy (35-45 percent). Chance of pcpn......10 percent. LAL.................1. Temperature.........Min 39. RH..................Max 89 percent. Wind (20 ft)........Southwest winds 5 to 9 mph. Haines Index........4 or low potential for large plume dominated fire growth. Mixing height.......300 ft AGL. Transport winds.....Southwest 8 to 17 mph. Smoke dispersal.....Poor (2100 knot-ft). TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........65 48 44 50 39 42 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Chc of pcpn (%).10 10 10 0 0 0 LAL.............1 1 1 1 1 1 Temp............57 51 47 45 43 41 RH..............43 56 68 73 79 85 20 ft wind......W 12 W 12 SW 7 SW 7 SW 7 SW 7 20 ft wind gust.18 18 10 10 10 10 Mix hgt (ft)....1800 500 400 400 300 300 Transport wind..W 17 W 10 W 10 SW 9 SW 9 SW 9 Haines index....4 4 4 4 4 4 Vrate kt-ft/1K..28 4 4 3 3 3 Ventrate Cat....POOR POOR POOR POOR POOR POOR $$ Forecaster...Erwin Requested by...Nathan Hudson Type of request...PRESCRIBED .TAG 2408742.0/ILX .DELDT 03/28/24 .FormatterVersion 2.0.0 .EMAIL nhudson@illinois.edu