Alert archive / Iowa / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 126, NWS Des Moines, IA

July 11, 2022Boone County, Greene County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 11, 2022, 4:20 AM CDT for Boone County, Greene County, Iowa. It was in force for 25 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 11, 2022, 4:20 AM CDT (09:20 UTC)
Expired: Jul 11, 2022, 4:45 AM CDT
In force: 25 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

Counties Boone County, IA, Greene County, IA

The radar

The Des Moines radar (KDMX), 50 km from the middle of the area, began a volume at 09:20 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
Jul 11, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

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 Jul 11, 3:49 AM CDT, 31 minutes earlier.

Area forecast discussion, Jul 11, 3:49 AM CDT, 31 minutes before

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Hazardous weather outlook, Jul 11, 3:13 AM CDT, 1 hour 7 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
313 AM CDT Mon Jul 11 2022

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-120815-
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-
313 AM CDT Mon Jul 11 2022

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Strong to severe storms are forecast over portions of Iowa this
morning with the main hazards being strong, gusty winds and small
hail.

A few additional showers and storms are possible later today
after the morning storms pass, but are expected to remain below
severe limits.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

More chances for storms return late in the week. The severe
potential for these storms will be better determined in the coming
days.

.SPOTTER INFORMATION STATEMENT...

Spotters reports of wind damage, wind gust speeds, and hail are
appreciated.

Ansorge

In the hours before

Special weather statement, Jul 11, 3:09 AM CDT, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Des Moines IA
309 AM CDT Mon Jul 11 2022

IAZ044-110900-
Crawford IA-
309 AM CDT Mon Jul 11 2022

...Strong thunderstorms will impact portions of Crawford County
through 400 AM CDT...

At 308 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles north of Moorhead to near Dunlap to 6
miles west of Earling. Movement was northeast at 50 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Strong thunderstorms will be near...
  Denison around 330 AM CDT.

Other locations impacted by these storms include Kiron, Charter Oak,
Deloit, Vail, Dow City, Schleswig, Denison Municipal Airport, Buck
Grove, Manilla and Westside.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
west central Iowa.

&&

LAT...LON 4218 9567 4221 9557 4221 9514 4216 9509
      4187 9509 4187 9510 4186 9567
TIME...MOT...LOC 0808Z 228DEG 43KT 4205 9590 4190 9566 4180 9555

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Small

Special weather statement, Jul 11, 3:24 AM CDT, 56 minutes before

Special Weather Statement
National Weather Service Des Moines IA
324 AM CDT Mon Jul 11 2022

IAZ045-057-058-110915-
Guthrie IA-Audubon IA-Carroll IA-
324 AM CDT Mon Jul 11 2022

...Strong thunderstorms will impact portions of Guthrie, Audubon and
Carroll Counties through 415 AM CDT...

At 324 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Denison to 9 miles southwest of Audubon to
6 miles east of Oakland. Movement was east at 65 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Strong thunderstorms will be near...
  Audubon around 330 AM CDT.
  Manning around 340 AM CDT.
  Guthrie Center around 350 AM CDT.
  Panora around 355 AM CDT.
  Stuart and Coon Rapids around 400 AM CDT.

Other locations impacted by these storms include Diamondhead Lake,
Arthur N Neu Airport, Yale, Willey, Halbur, Lidderdale, Templeton,
Menlo, Dedham and Brayton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
central, south central, southwestern and west central Iowa.

&&

LAT...LON 4221 9509 4221 9473 4210 9463 4186 9463
      4186 9441 4173 9428 4160 9428 4160 9424
      4150 9424 4151 9504 4160 9504 4160 9509
TIME...MOT...LOC 0824Z 271DEG 58KT 4195 9540 4164 9509 4129 9528

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Small

Local storm report, Jul 11, 3:43 AM CDT, 37 minutes before

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Local storm report, Jul 11, 4:02 AM CDT, 18 minutes before

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Local storm report, Jul 11, 4:10 AM CDT, 10 minutes before

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Local storm report, Jul 11, 4:13 AM CDT, 7 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
Jul 11, 3:09 AM CDT	Special Weather Statement	DMX	Crawford	51 min
Jul 11, 3:19 AM CDT	Severe Thunderstorm Warning	DMX	Crawford	41 min
Jul 11, 3:24 AM CDT	Special Weather Statement	DMX	Audubon, Carroll, Guthrie	51 min
Jul 11, 3:35 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Sac	40 min
Jul 11, 4:05 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Sac, Webster	40 min
Jul 11, 4:44 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Story, Webster	46 min
Jul 11, 4:57 AM CDT	Special Weather Statement	DMX	Dallas, Polk, Warren	48 min
Jul 11, 5:23 AM CDT	Special Weather Statement	DMX	Grundy, Hardin, Marshall, Tama	52 min
Jul 11, 5:41 AM CDT	Severe Thunderstorm Warning	DMX	Marshall, Poweshiek, Tama	34 min
Jul 11, 6:07 AM CDT	Special Weather Statement	DMX	Black Hawk	23 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2022 Every 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.