FNUS73 KLSX 190841 FWSLSX Spot Forecast for Long Ridge Blue Trail...Missouri Dept. of Conservation National Weather Service Saint Louis MO 341 AM CDT Thu Mar 19 2026 Forecast is based on ignition time of 1000 CDT on March 19. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Temperatures will be well above normal today through Saturday, and Sunday for location along and south of I-44 in Missouri and south of I-70 in Illinois. Highs will ranges through the 70s to low-80s each of the next three days with cooler temperatures entering northern Missouri and west-central Illinois Sunday. Minimum RH values range from near 30 percent to 45 percent across the region with the lowest values extending from south-central Missouri through southeast Missouri. Light south-southwesterly flow is expected today with speeds around or less than 5 mph. Mixing heights generally range from 3,000 feet to 5,000 feet. Transport winds remain weak over much of the region with poor ventilation rates. The one exception is over southeast Missouri, near and northeast of the Ozarks, where slightly stronger transport winds result in fair ventilation and slightly higher mixing heights that peak just below 6,000 feet. Minimum RH values remain fairly consistent now through the weekend. However, the pick day is likely Friday with slightly better transport winds and some improvement to ventilation. Conditions return to fair/poor categories Saturday. .REST OF TODAY... Sky/weather.........Mostly sunny (25-35 percent). CWR.................2 percent. Temperature.........58 at ignition...Max 77. RH..................62 percent at ignition...Min 36 percent. Eye level winds.....Calm to light and variable. Wind (20 ft)........Winds southwest at 2 mph at ignition...otherwise Light winds. Mixing height.......700 ft AGL at ignition...otherwise max 3800 ft AGL. Transport winds.....Southwest 8 to 12 mph. Smoke dispersal.....Poor /770 m/s-m/ at ignition. Max...marginal /5310 m/s-m/. TIME (CDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM Sky (%).........51 36 20 8 12 20 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 0 0 Temp............58 68 74 77 75 67 RH..............62 47 40 36 40 52 20 ft wind......SW 2 SW 2 SW 2 SW 2 S 1 SE 1 20 ft wind gust.8 8 7 7 6 6 Eye level wind..SW 1 SW 1 SW 1 SW 1 S 0 SE 0 Eye lvl wnd gst.4 4 3 3 3 3 Mix hgt (kft)...0.7 1.7 3.1 3.8 1.0 0.4 Transport wind..SW 8 SW 8 S 12 SW 10 S 8 S 9 Vrate kt-ft/1K..5 12 32 34 7 3 Ventrate Cat....POOR POOR POOR POOR POOR POOR .TONIGHT... Sky/weather.........Mostly clear (20-30 percent). CWR.................0 percent. Temperature.........Min 51. RH..................Max 83 percent. Eye level winds.....Calm to light and variable. Wind (20 ft)........Light winds. Mixing height.......Min 400 ft AGL. Transport winds.....South 8 to 13 mph. Smoke dispersal.....Poor (490 m/s-m). .FRIDAY... Sky/weather.........Sunny (10-20 percent). CWR.................1 percent. Temperature.........Max 84. RH..................Min 33 percent. Eye level winds.....Light and variable. Wind (20 ft)........Light winds becoming west around 5 mph late in the afternoon, then becoming light late in the afternoon. Mixing height.......Max 4800 ft AGL. Transport winds.....West 9 to 18 mph increasing to 17 to 21 mph late in the afternoon. Smoke dispersal.....Poor (570 m/s-m) early in the morning increasing to good max (13650 m/s-m) in the afternoon. $$ Forecaster...Maples Requested by...Matt Pilz Type of request...PRESCRIBED .TAG 2606367.0/LSX .DELDT 03/19/26 .FormatterVersion 2.0.0