Alert archive / Missouri / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 139, NWS St. Louis, MO

May 4, 2024Reynolds County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 4, 2024, 1:21 PM CDT for Reynolds County, Missouri. It was in force for 24 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 4, 2024, 1:21 PM CDT (18:21 UTC)
Expired: May 4, 2024, 1:45 PM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Reynolds County, MO

The radar

The St Louis radar (KLSX), 151 km from the middle of the area, began a volume at 18:24 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

Springfield, MO (KSGF), launched 12:00Z, 6.4 hours before the alert went out and 256 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: 905 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 730 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 142 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 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 4, 12:55 PM CDT, 26 minutes earlier.

Area forecast discussion, May 4, 12:55 PM CDT, 26 minutes before

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Hazardous weather outlook, May 4, 3:36 AM CDT, 9 hours 45 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 9:54 PM CDT	River Flood Warning	LSX	Lewis	60 hr
May 3, 10:07 PM CDT	Dense Fog Advisory	LSX	Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois	8 hr
May 4, 4:38 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	67 min
May 4, 4:58 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	32 min
May 4, 5:32 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Saint Francois, Washington	28 min
May 4, 5:45 PM CDT	Areal Flood Advisory	LSX	Jefferson, Saint Louis	3 hr
May 4, 6:34 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois	26 min
May 4, 6:39 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	51 min
May 4, 3:09 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	51 min
May 4, 3:22 PM CDT	Severe Thunderstorm Warning	LSX	Brown	23 min
May 4, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Greene	33 min
May 4, 3:41 PM CDT	Severe Thunderstorm Warning	LSX	Greene	19 min
May 4, 5:13 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Madison	47 min
May 4, 5:35 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair, Washington	25 min
May 4, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette	30 min
May 4, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Washington	48 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.