Alert archive / Iowa / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 221, NWS Des Moines, IA

September 14, 20194 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Sep 14, 2019, 3:00 PM CDT for 4 counties in Iowa. It was in force for 45 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: Sep 14, 2019, 3:00 PM CDT (20:00 UTC)
Expired: Sep 14, 2019, 3:45 PM CDT
In force: 45 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Boone County, IA, Dallas County, IA, Polk County, IA, Story County, IA

The radar

The Des Moines radar (KDMX), 15 km from the middle of the area, began a volume at 20:03 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.

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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 14, 1:50 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Sep 14, 1:50 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Sep 14, 5:04 AM CDT, 9 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
504 AM CDT Sat Sep 14 2019

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-151015-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
504 AM CDT Sat Sep 14 2019

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Scattered thunderstorms are possible tonight into Sunday morning.
A few storms may become severe with hail and damaging winds the
main threat.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Periodic storm chances are possible Tuesday into Thursday, but the
probability of severe weather remains low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters might be needed late tonight.

KLP

In the hours before

Special weather statement, Sep 14, 12:12 PM CDT, 2 hours 48 minutes before

Special Weather Statement
National Weather Service Des Moines IA
1212 PM CDT Sat Sep 14 2019

IAZ057-058-070-141800-
Guthrie IA-Audubon IA-Cass IA-
1212 PM CDT Sat Sep 14 2019

...Up to Nickle Sized Hail and Heavy Rain Possible...

At 1210 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Audubon, moving northeast at 25 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Audubon, Exira, Adair, Elk Horn, Kimballton, Brayton, Marne and
Audubon County Airport.

LAT...LON 4150 9515 4151 9504 4160 9504 4160 9509
      4176 9509 4186 9480 4186 9478 4151 9458
      4150 9470 4148 9470 4142 9516
TIME...MOT...LOC 1710Z 244DEG 24KT 4168 9508

Hagenhoff

Local storm report, Sep 14, 2:24 PM CDT, 36 minutes before

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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 14, 10:56 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	23 min
Sep 14, 12:12 PM CDT	Special Weather Statement	DMX	Audubon	48 min
Sep 14, 12:15 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	30 min
Sep 14, 12:18 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	27 min
Sep 14, 12:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	30 min
Sep 14, 12:46 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	29 min
Sep 14, 2:21 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas	39 min
Sep 14, 2:53 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	22 min
Sep 14, 3:16 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	44 min
Sep 14, 3:50 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	29 min
Sep 14, 4:10 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	35 min
Sep 14, 4:44 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	29 min
Sep 14, 5:26 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	34 min
Sep 14, 5:59 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Story	19 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2019 Every severe thunderstorm warning in 2019

Sources

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