Alert archive / Iowa / Special Weather Statements in 2022

Special Weather Statement, NWS Des Moines, IA

July 5, 202211 counties in Iowa

NWS Des Moines, IA issued this special weather statement at Jul 5, 2022, 6:49 PM CDT for 11 counties in Iowa. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 5, 2022, 6:49 PM CDT (23:49 UTC)
Expired: Jul 5, 2022, 7:45 PM CDT
In force: 56 min
Issued by: NWS Des Moines, IA
Hail: 0.00 in
Wind: 55

Counties Adair County, IA, Audubon County, IA, Boone County, IA, Carroll County, IA, Cass County, IA, Dallas County, IA, Greene County, IA, Guthrie County, IA, Madison County, IA, Polk County, IA, Story County, IA

The radar

The Des Moines radar (KDMX), 93 km from the middle of the area, began a volume at 23:51 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

Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 132 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: 925 J/kg
Mixed-layer CIN: -324 J/kg
Mixed-layer LCL: 1874 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 5, 6:47 PM CDT, 2 minutes earlier.

Area forecast discussion, Jul 5, 6:47 PM CDT, 2 minutes before

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Hazardous weather outlook, Jul 5, 3:57 PM CDT, 2 hours 52 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
357 PM CDT Tue Jul 5 2022

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-062030-
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-
357 PM CDT Tue Jul 5 2022

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

A Heat Advisory is in effect until 8 PM this evening. High heat
and humidity will combine to make potentially dangerous conditions
with peak heat index values between 100 to 109 degrees this
afternoon. Please exercise caution if outdoors this evening.

Strong to severe storms are possible tonight with damaging winds
and heavy rain being the primary threats. The greatest risk of
severe weather is across northern and northwest Iowa, but a few
strong to severe storms may still impact portions of central Iowa
as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Periodic storm chances continue Wednesday into Thursday night for
much of the area. There is a marginal risk of severe storms for
Wednesday and Thursday with locally heavy rainfall also possible.

.SPOTTER INFORMATION STATEMENT...

Spotter reports for tonight's storms will be needed.

Dodson

In the hours before

Local storm report, Jul 5, 5:57 PM CDT, 52 minutes before

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Local storm report, Jul 5, 6:14 PM CDT, 35 minutes before

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Special weather statement, Jul 5, 6:17 PM CDT, 32 minutes before

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Local storm report, Jul 5, 6:25 PM CDT, 24 minutes before

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Local storm report, Jul 5, 6:27 PM CDT, 22 minutes before

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Special weather statement, Jul 5, 6:49 PM CDT, 0 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 5, 5:31 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Emmet, Humboldt, Kossuth, Palo Alto, Pocahontas and 2 more	59 min
Jul 5, 6:08 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Greene, Hamilton, Hancock, Humboldt and 5 more	52 min
Jul 5, 6:17 PM CDT	Special Weather Statement	DMX	Audubon, Carroll, Crawford, Greene	43 min
Jul 5, 6:19 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Hancock, Kossuth, Palo Alto, Winnebago	56 min
Jul 5, 6:39 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	66 min
Jul 5, 6:56 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Cerro Gordo, Franklin, Hamilton, Hancock, Hardin and 4 more	49 min

Nearby

Special Weather Statements in Iowa, 2022 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.