Alert archive / Iowa / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 144, NWS Des Moines, IA

August 7, 20224 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 7, 2022, 7:54 PM CDT for 4 counties in Iowa. It was in force for 41 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
Aug 7, 2022, 7:54 PM CDT (00:54 UTC)
Expired
Aug 7, 2022, 8:35 PM CDT
In force
41 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Jasper County, IA, Marshall County, IA, Poweshiek County, IA, Tama County, IA

The radar

The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 00:55 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.

In the hours before

Special weather statement, Aug 7, 7:41 PM CDT, 13 minutes before
Special Weather Statement
National Weather Service Des Moines IA
741 PM CDT Sun Aug 7 2022

IAZ060-073-080130-
Polk IA-Warren IA-
741 PM CDT Sun Aug 7 2022

...A strong thunderstorm will impact portions of southwestern Polk
and northwestern Warren Counties through 830 PM CDT...

At 737 PM CDT, Doppler radar was tracking a strong thunderstorm over
Norwalk, moving northeast at 15 mph.

HAZARD...Additional heavy rainfall of one to 2 inches is possible.

SOURCE...Radar indicated.

IMPACT...Ponding of ponding of water on roadways, low visibilities,
         some street flooding is possible and rises in small streams
         and creeks.

This strong thunderstorm will be near...
  Norwalk around 750 PM CDT.
  Des Moines Int'l Airport around 755 PM CDT.

Other locations in the path of this storm include Principal Park,
Southridge Mall, Iowa Events Center and Des Moines.

This includes the following highways...
 Interstate 35 between mile markers 65 and 69.
 Interstate 235 near mile marker 8.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4153 9379 4160 9362 4149 9353 4146 9379
TIME...MOT...LOC 0037Z 246DEG 14KT 4151 9374

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

REV
Local storm report, Aug 7, 7:46 PM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
746 PM CDT SUN AUG 7 2022

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

0651 PM     TSTM WND DMG     2 NW DES MOINES         41.60N 93.65W
08/07/2022                   POLK               IA   PUBLIC

            PUBLIC TWEET INDICATING A LARGE TREE HAD
            FALLEN AND TAKEN DOWN POWERLINES. TIME
            ESTIMATED FROM RADAR.

&&

DODSON
Special weather statement, Aug 7, 7:49 PM CDT, 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 7:12 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall63 min
Aug 7, 7:41 PM CDTSpecial Weather StatementDMXPolk49 min
Aug 7, 7:49 PM CDTSpecial Weather StatementDMXJasper26 min
Aug 7, 8:42 PM CDTSevere Thunderstorm WarningDMXMadison, Warren27 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2022Every severe thunderstorm warning in 2022

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.