McLeansboro, IL 62859 Weather

Jefferson-Wayne IL-Edwards-Wabash-Perry IL-Franklin-Hamilton- White-Jackson-Williamson-Saline-Gallatin-Union-Johnson-Pope- Hardin-Alexander-Pulaski-Massac-Gibson-Pike-Posey-Vanderburgh- Warrick-Spencer-Fulton-Hickman-Carlisle-Ballard-McCracken-Graves- Livingston-Marshall-Calloway-Crittenden-Lyon-Trigg-Caldwell- Union KY-Webster-Hopkins-Christian-Henderson-Daviess-McLean- Muhlenberg-Todd-Perry MO-Bollinger-Cape Girardeau-Wayne MO-Carter- Ripley-Butler-Stoddard-Scott-Mississippi-New Madrid- 141 PM CDT Tue Oct 27 2026 /241 PM EDT Tue Oct 27 2026/

This Hazardous Weather Outlook is for portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri.

Day one: This Afternoon and Tonight

No hazardous weather is expected at this time.

Days two through seven: Wednesday through Monday

A few rumbles of thunder cannot be ruled out Saturday night into Sunday.

Spotter information statement

Spotter activation is not anticipated.

Key messages

- Warm and dry weather finishes out this work week.

- Rain chances return this weekend.

- Cooler temperatures closer to normal greet the new week with continued daily rain chances.

Discussion

Issued at 1205 PM CDT Wed Oct 28 2026

A persistence strategy, steady-as-she-goes approach is best in the near term with our continued high pressure dominated forecast. That means daily highs around 80F thru Friday, a good dozen or so degrees above climatological norms. Mild lows will run 5-10F above climo., bottoming out in the upper 40s to lower 50s.

Rain chances make their emergence in the forecast this weekend, which heralds a wetter period extending into next week with daily rain chances prevailing. The first half of the weekend still looks dry, with most model members holding off on appreciable rain chances til Saturday night (and Sunday). The chance occurs coincident with the opening up and flattening out of a weak wave of low pressure that makes its way across the MS Valley over the course of the weekend. With little instability to tap, we're looking at probably 1/2 inch or less cumulative rainfall totals, mostly in the 06z-18z Sunday time frame; a little before and a little after not-withstanding.

A brief pause/lull in chances occurs starting out the new week, before a broad synoptic low winds out of the Rockies and Plains states and tracks our direction. Its current tracking takes the parent low center to our south, which is pinched on both sides by high pressure ridging in an inverted omega-like blocking look to the pattern; the net effect will be more clouds/pcpn chances daily and temperatures a little closer to seasonal norms with highs in the lower 70s. The further southward dive of the low means rain totals on this morning's 12Z runs have basically halved from the previous runs: but we still may end up verifying the projected "above normal" rainfall for the period with the daily rain chances continuing. Best such chances at this time look to be Tuesday into Wednesday.

Aviation

Issued at 1205 PM CDT Wed Oct 28 2026

High pressure keeps a dry, tranquil weather pattern in place this package. Time/height cross sections suggest that outside of FEW-SCT base potential in the mid-upper levels, we'll likely run SKC for most of the forecast valid time. Southerlies will be light, mainly during the day, calm at night.

Watches, warnings and advisories

IL: None. MO: None. IN: None. KY: None.