Alert archive / Illinois / Flash Flood Warnings in 2026

Flash Flood Warning 1, NWS Paducah, KY

March 5, 20264 counties in Illinois; Cape Girardeau County, Missouri

NWS Paducah, KY issued this flash flood warning at Mar 5, 2026, 12:49 AM CST for 4 counties in Illinois; Cape Girardeau County, Missouri. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 5, 2026, 12:49 AM CST (06:49 UTC)
Expired: Mar 5, 2026, 8:00 AM CST
In force: 7 hr
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Flood severity: None

Counties Alexander County, IL, Johnson County, IL, Pulaski County, IL, Union County, IL, Cape Girardeau County, MO

The radar

The Paducah radar (KPAH), 53 km from the middle of the area, began a volume at 06:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.8 hours before the alert went out and 317 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Paducah, KY wrote its last area forecast discussion before this flash flood warning went out at Mar 4, 11:54 PM CST, 55 minutes earlier.

Area forecast discussion, Mar 4, 11:54 PM CST, 55 minutes before

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Hazardous weather outlook, Mar 4, 2:37 PM CST, 10 hours 12 minutes before

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In the hours before

Local storm report, Mar 4, 9:05 PM CST, 3 hours 44 minutes before

Preliminary Local Storm Report
National Weather Service Paducah KY
905 PM CST Wed Mar 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0827 PM     Hail             2 SW East Prairie       36.76N 89.39W
03/04/2026  M1.00 Inch       Mississippi        MO   Public

&&

Local storm report, Mar 4, 9:10 PM CST, 3 hours 39 minutes before

Preliminary Local Storm Report
National Weather Service Paducah KY
910 PM CST Wed Mar 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0904 PM     Hail             3 S Chaffee             37.13N 89.67W
03/04/2026  E0.75 Inch       Scott              MO   Public

            Report from mPING: Dime (0.75 in.).

&&

Special weather statement, Mar 4, 10:13 PM CST, 2 hours 36 minutes before

Special Weather Statement
National Weather Service Paducah KY
1013 PM CST Wed Mar 4 2026

ILZ089-090-094-050500-
Massac IL-Pope IL-Johnson IL-
1013 PM CST Wed Mar 4 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN MASSAC...NORTHERN
POPE AND SOUTHEASTERN JOHNSON COUNTIES THROUGH 1100 PM CST...

At 1012 PM CST, Doppler radar was tracking a strong thunderstorm near
Karnak, or near Vienna, moving northeast at 35 mph.

HAZARD...Nickel size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vegetation is possible.

Locations impacted include...
Vienna, Dixon Springs, New Columbia, New Burnside, Belknap,
Eddyville, and Simpson.

This includes Interstate 24 in Illinois between Mile Markers 12 and
25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1100 PM CST for
southern Illinois.

&&

LAT...LON 3724 8889 3738 8898 3760 8876 3760 8845
      3757 8841 3752 8841
TIME...MOT...LOC 0412Z 226DEG 30KT 3734 8891

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH

JGG

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 4, 8:52 PM CST	Severe Thunderstorm Warning	PAH	Ballard, Carlisle	35 min
Mar 5, 5:23 AM CST	Areal Flood Advisory	PAH	Ballard, Crittenden, Livingston, McCracken	3 hr
Mar 5, 7:23 AM CST	Areal Flood Advisory	PAH	Daviess, Henderson, Union	3 hr
Mar 5, 7:51 AM CST	Areal Flood Warning	PAH	Crittenden, Livingston	3 hr
Mar 5, 9:59 AM CST	Areal Flood Warning	PAH	Daviess, Henderson, Union	100 min
Mar 5, 11:16 AM CST	River Flood Warning	PAH	Crittenden, Union	11 days
Mar 5, 11:18 AM CST	River Flood Warning	PAH	Daviess, Henderson	7 days
Mar 4, 10:13 PM CST	Special Weather Statement	PAH	Johnson	47 min
Mar 4, 10:22 PM CST	Severe Thunderstorm Warning	PAH	Johnson, Massac, Pope	53 min
Mar 4, 10:55 PM CST	Severe Thunderstorm Warning	PAH	Gallatin, Hardin, Pope, Saline	50 min
Mar 4, 11:43 PM CST	Areal Flood Advisory	PAH	Hardin, Johnson, Massac, Pope, Pulaski	8 hr
Mar 5, 10:42 AM CST	River Flood Warning	PAH	Gallatin, Wabash, White	15 days
Mar 4, 8:42 PM CST	Severe Thunderstorm Warning	PAH	Mississippi	33 min
Mar 5, 1:48 AM CST	Areal Flood Advisory	PAH	Bollinger, Cape Girardeau, Perry	54 min
Mar 5, 2:42 AM CST	Flash Flood Warning	PAH	Bollinger, Cape Girardeau, Perry	6 hr
Mar 5, 4:33 AM CST	Areal Flood Advisory	PAH	Bollinger, Cape Girardeau	3 hr
Mar 5, 8:51 AM CST	Areal Flood Warning	PAH	Bollinger, Cape Girardeau, Perry	2 hr
Mar 5, 9:41 AM CST	River Flood Warning	PAH	Wayne	30 hr

Nearby

Flash Flood Warnings in Illinois, 2026 Flash Flood Warnings in Missouri, 2026 Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.