Alert archive / Missouri / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 250, NWS St. Louis, MO

July 13, 2023Audrain County, Boone County, Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 13, 2023, 1:31 AM CDT for Audrain County, Boone County, Callaway County, Missouri. It was in force for 28 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
Jul 13, 2023, 1:31 AM CDT (06:31 UTC)
Expired
Jul 13, 2023, 1:59 AM CDT
In force
28 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Audrain County, MO, Boone County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 121 km from the middle of the area, began a volume at 06:31 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 00:00Z, 6.5 hours before the alert went out and 282 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2023-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1048 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2023-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1048 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
2115 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 Jul 13, 12:52 AM CDT, 39 minutes earlier.

Area forecast discussion, Jul 13, 12:52 AM CDT, 39 minutes before
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Hazardous weather outlook, Jul 12, 2:36 PM CDT, 10 hours 55 minutes before
Hazardous Weather Outlook
National Weather Service St Louis MO
236 PM CDT Wed Jul 12 2023

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-131945-
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-
236 PM CDT Wed Jul 12 2023

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

.DAY ONE...Tonight.

There is a chance of thunderstorms through tonight. Some
thunderstorms may be severe capable of producing damaging winds and
large hail.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The chance of thunderstorms will continue through Tuesday, with the
best chances late Friday and Friday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed through early tonight.
Spotters are encouraged to report any hail or wind damage to the
National Weather Service.

Gosselin

In the hours before

Local storm report, Jul 12, 9:41 PM CDT, 3 hours 50 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
941 PM CDT Wed Jul 12 2023

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

0923 PM     Tstm Wnd Dmg     1 E Park Hills          37.85N 90.51W
07/12/2023                   St. Francois       MO   Law Enforcement

            Law enforcement they were responding to a
            report of a person trapped in their home due
            to a tree than had fallen on the residence.
            The officer stated that several trees were
            down in the Park Hills area and measured a
            peak gust of 68 mph on an anemometer. Time
            estimated by radar.

&&

Maples
Local storm report, Jul 12, 9:47 PM CDT, 3 hours 44 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
947 PM CDT Wed Jul 12 2023

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

0737 PM     Tstm Wnd Dmg     1 ESE Affton            38.54N 90.31W
07/12/2023                   St. Louis          MO   Trained Spotter

            Spotter reported a tree down on a car off
            Starboard Drive. A tree had also fallen on a
            residence off Dulles Court. Several other
            reports of tree damage and powerline down in
            the Afton area. Time estimated by radar.

&&

Maples
Local storm report, Jul 12, 9:55 PM CDT, 3 hours 36 minutes before
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Local storm report, Jul 12, 10:34 PM CDT, 2 hours 57 minutes before
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Local storm report, Jul 12, 10:37 PM CDT, 2 hours 54 minutes before
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Local storm report, Jul 12, 10:39 PM CDT, 2 hours 52 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:24 PM CDTSevere Thunderstorm WarningLSXCallaway, Gasconade, Osage29 min
Jul 12, 7:57 PM CDTSevere Thunderstorm WarningLSXGasconade, Osage38 min
Jul 12, 8:17 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington43 min
Jul 12, 8:32 PM CDTSevere Thunderstorm WarningLSXGasconade, Osage43 min
Jul 12, 8:41 PM CDTSevere Thunderstorm WarningLSXIron, Saint Francois, Washington49 min
Jul 12, 8:48 PM CDTSevere Thunderstorm WarningLSXCrawford, Iron42 min
Jul 12, 9:25 PM CDTSevere Thunderstorm WarningLSXIron, Madison, Saint Francois50 min
Jul 12, 9:51 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Francois39 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2023Every severe thunderstorm warning in 2023

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.