Alert archive / Missouri / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 235, NWS St. Louis, MO

May 25, 2024Iron County, Madison County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 25, 2024, 12:09 AM CDT for Iron County, Madison County, Missouri. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 25, 2024, 12:09 AM CDT (05:09 UTC)
Expired: May 25, 2024, 1:00 AM CDT
In force: 51 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, MO, Madison County, MO

The radar

The St Louis radar (KLSX), 135 km from the middle of the area, began a volume at 05:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 24, 2:39 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.2 hours before the alert went out and 298 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: 2768 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 8.8

Open this sounding in Storm Lab

What forecasters said that day

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

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at May 24, 11:47 PM CDT, 22 minutes earlier.

Area forecast discussion, May 24, 11:47 PM CDT, 22 minutes before

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Hazardous weather outlook, May 24, 3:56 PM CDT, 8 hours 13 minutes before

Hazardous Weather Outlook
National Weather Service St Louis MO
356 PM CDT Fri May 24 2024

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-252100-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
356 PM CDT Fri May 24 2024

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight.

Thunderstorms are likely across the forecast area through this
evening. Some strong to severe storms are possible and capable of
primarily large hail and damaging winds with a low threat of
tornadoes.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There is a chance of thunderstorms Saturday night through Sunday night.
A few thunderstorms may become severe late Saturday night into Sunday
morning and possibly again during the afternoon/evening, with large
hail, damaging winds, and a tornado possible across the forecast
area.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report any severe weather, if observed,
to the National Weather Service.

Byrd

In the hours before

Local storm report, May 24, 8:06 PM CDT, 4 hours 3 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
806 PM CDT Fri May 24 2024

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

0438 PM     Tstm Wnd Dmg     Mount Sterling          38.47N 91.62W
05/24/2024                   Gasconade          MO   Public

            Public reported relayed through media. Tree
            branches and a few trees down. Time
            estimated from radar.

&&

Local storm report, May 24, 8:59 PM CDT, 3 hours 10 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
859 PM CDT Fri May 24 2024

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

0407 PM     Flood            Louisiana               39.44N 91.06W
05/24/2024                   Pike               MO   Emergency Mngr

            Water pooling on roads reported in
            Louisiana.

&&

LSJ

Local storm report, May 24, 9:03 PM CDT, 3 hours 6 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
903 PM CDT Fri May 24 2024

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

0537 PM     Flood            1 ESE Louisiana         39.44N 91.04W
05/24/2024                   Pike               MO   Emergency Mngr

            Hwy 79 closed south of Louisiana due to
            water covering roadway. Cannot tell how deep
            water is or how fast it was flowing.
            Numerous twigs and small tree branches in
            water.

&&

LSJ

Local storm report, May 24, 9:16 PM CDT, 2 hours 53 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
916 PM CDT Fri May 24 2024

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

0545 PM     Flood            1 SW White Hall         39.43N 90.42W
05/24/2024                   Greene             IL   Amateur Radio

            Picture of flooded road. Water from creek
            appears to be flowing in picture. Report of
            up to 8 to 12 inches on road at the time.

&&

LSJ

Local storm report, May 24, 9:43 PM CDT, 2 hours 26 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
943 PM CDT Fri May 24 2024

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

0932 PM     Hail             Cedar Hill              38.36N 90.64W
05/24/2024  E1.00 Inch       Jefferson          MO   Trained Spotter

            Off and on 1 inch hail for about 10 minutes
            beginning at 2132 CDT.

&&

LSJ

Local storm report, May 24, 10:43 PM CDT, 1 hour 26 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
1043 PM CDT Fri May 24 2024

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

1042 PM     Rain             1 NNW Litchfield        39.19N 89.66W
05/24/2024  M8.40 Inch       Montgomery         IL   Emergency Mngr

&&

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 8:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	50 min
May 24, 8:52 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson	38 min
May 24, 9:26 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	49 min
May 24, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	19 min
May 24, 10:10 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	50 min
May 24, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Saint Francois, Washington	46 min
May 24, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	31 min
May 24, 11:23 PM CDT	Tornado Warning	LSX	Iron	37 min
May 24, 11:29 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds	46 min
May 25, 12:32 AM CDT	Areal Flood Advisory	LSX	Iron, Madison, Reynolds	58 min
May 25, 10:55 AM CDT	River Flood Warning	LSX	Lincoln	21 days
May 25, 2:06 PM CDT	Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 19 more	32 hr
May 24, 9:30 PM CDT	River Flood Warning	LSX	Calhoun, Greene, Jersey	7 days
May 24, 9:51 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	25 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2024 Every severe thunderstorm warning in 2024

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.