Missouri and Illinois residents step into bright sun and dry air this morning, but the real concern builds by midday as winds strengthen and humidity drops. Grasses are brown. Fields are dry. One spark could move fast.
According to the National Weather Service in St. Louis, a Red Flag Warning remains in effect from noon to 6 p.m. across central and eastern Missouri and southwest Illinois. Southwest winds will range from 15 to 20 mph, with gusts up to 30 mph. Relative humidity will fall between 20 and 25 percent. Highs climb into the lower 70s.
That combination creates critical fire weather conditions across the St. Louis metro, including areas along I-44, I-64 and I-55. Outdoor burning is strongly discouraged. Secure trailer chains. Avoid parking on dry grass. Fire crews urge extreme caution.
Tonight turns mostly clear with lows near 41 degrees. Saturday stays mild with highs around 66 and only a slight rain chance. Changes arrive late Sunday.
Clouds increase Sunday with highs near 46. By Sunday night, rain develops and may mix with snow before daybreak Monday. The chance of precipitation rises to 80 percent. While snowfall looks light, slushy bursts could reduce visibility and create slick spots early Monday, especially on bridges.
Monday holds a 30 percent chance of rain or snow before noon with highs near 44. Rain chances increase again Tuesday, with highs in the low 50s. Thunderstorms are possible by midweek as March begins on an active note.
The 6–10 day outlook trends warmer than normal, signaling early Spring Vibes after this unsettled stretch.
Five Day Outlook for St. Louis, Missouri:
Friday: Sunny, high 73.
Saturday: Slight rain chance, high 66.
Sunday: Rain late, high 46.
Monday: Chance rain/snow early, high 44.
Tuesday: Rain likely, high 53.
