FNUS73 KLSX 201016 FWSLSX Spot Forecast for Hickory Ridge Burn Unit...MO DNR National Weather Service Saint Louis MO 516 AM CDT Fri Mar 20 2026 Forecast is based on ignition time of 0800 CDT on March 20. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Well above normal temperatures will continue today with RH values hitting their minimum in the mid 20s this afternoon. Initially light southwesterly winds will become westerly and increase in speed to approximately 10-12 mph at 30 ft, resulting in elevated fire conditions within the burn area, promoting efficient spread. Mixing will reach above 1,000 ft around noon today and continue to mix into the afternoon, reaching a maximum between 4,000-5,000 ft by 3-4 PM. Winds between 10-25 mph within the mixed layer this afternoon will promote excellent some dispersion. A weak, dry cold front will move into the area this evening between 6-8PM, and winds will become northerly behind it. Cooling temperatures with sunset will cause RH to increase and the mixed layer to collapse, trapping any lingering smoke at the surface. .REST OF TODAY... Sky/weather.........Sunny (5-15 percent). CWR.................0 percent. Chance of thunder...1 percent. Temperature.........55 at ignition...Max 86. RH..................74 percent at ignition...Min 26 percent. Eye level winds.....1-2 mph using an adjustment factor of 0.3. Wind (20 ft)........Winds southwest at 3 mph at ignition...otherwise West winds 5 to 6 mph early in the morning becoming light, then becoming west 5 to 6 mph late in the morning. Mixing height.......600 ft AGL at ignition...otherwise max 5700 ft AGL. Transport winds.....West 12 to 20 mph. Smoke dispersal.....Poor /910 m/s-m/ at ignition. Max...excellent /15210 m/s-m/. TIME (CDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM Sky (%).........9 4 2 5 14 24 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 Temp............55 66 79 84 86 84 RH..............74 61 41 30 26 29 20 ft wind......SW 3 SW 4 W 6 W 6 W 6 W 3 20 ft wind gust.10 13 14 15 15 11 Eye level wind..SW 1 SW 2 W 3 W 3 W 3 W 1 Eye lvl wnd gst.5 6 6 7 7 5 Mix hgt (kft)...0.6 0.9 2.3 4.7 5.7 1.2 Transport wind..W 12 W 13 W 16 W 17 W 20 W 12 Vrate kt-ft/1K..6 10 32 71 97 12 Ventrate Cat....POOR POOR POOR GOOD GOOD POOR .TONIGHT... Sky/weather.........Mostly clear (15-25 percent). CWR.................1 percent. Chance of thunder...2 percent. Temperature.........Min 52. RH..................Max 93 percent. Eye level winds.....Light winds. Wind (20 ft)........Light winds. Mixing height.......Min 500 ft AGL. Transport winds.....Northwest 8 to 12 mph shifting to the southeast after 3 am. Smoke dispersal.....Poor (470 m/s-m). .SATURDAY... Sky/weather.........Sunny (0-10 percent). CWR.................1 percent. Chance of thunder...3 percent. Temperature.........Max 85. RH..................Min 31 percent. Eye level winds.....Light winds. Wind (20 ft)........Light winds. Mixing height.......Max 4800 ft AGL. Transport winds.....South 5 to 7 mph shifting to the west 5 to 8 mph in the late morning and afternoon. Smoke dispersal.....Poor (350 m/s-m) early in the morning increasing to marginal max (5310 m/s-m) in the afternoon. $$ Forecaster...Delia Requested by...Erik Otto Type of request...PRESCRIBED .TAG 2606407.1/LSX .DELDT 03/20/26 .FormatterVersion 2.0.0