Alert archive / Iowa / Flood Watches in 2022

Flood Watch 2, NWS Des Moines, IA

August 6, 20227 counties in Iowa

NWS Des Moines, IA issued this flood watch at Aug 6, 2022, 2:59 PM CDT for 7 counties in Iowa. It took effect at Aug 6, 2022, 10:00 PM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Aug 6, 2022, 2:59 PM CDT (19:59 UTC)
In effect from
Aug 6, 2022, 10:00 PM CDT
Expired
Aug 7, 2022, 10:00 AM CDT
In force
12 hr
Issued by
NWS Des Moines, IA
Flood severity
None

Counties Cerro Gordo County, IA, Emmet County, IA, Hancock County, IA, Kossuth County, IA, Palo Alto County, IA, Winnebago County, IA, Worth County, IA

The radar

The Des Moines radar (KDMX), 167 km from the middle of the area, began a volume at 20:00 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

Minneapolis, MN (KMPX), launched 12:00Z, 8.0 hours before the alert went out and 183 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, Minneapolis, MN at 12:00Z on 2022-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 733 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, Minneapolis, MN at 12:00Z on 2022-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 220 square meters per square second.1939Sfc1 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
733 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
935 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
220 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Aug 6, 12:46 PM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Aug 6, 12:46 PM CDT, 2 hours 13 minutes before
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Hazardous weather outlook, Aug 6, 3:58 AM CDT, 11 hours 1 minute before
Hazardous Weather Outlook
National Weather Service Des Moines IA
358 AM CDT Sat Aug 6 2022

IAZ023>028-033>039-044>050-057>062-070>075-081>086-092>097-070900-
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-
358 AM CDT Sat Aug 6 2022

This Hazardous Weather Outlook is for portions of central and
south central Iowa.

.DAY ONE...Today and tonight

A Heat Advisory is in effect for the area today. Please refer to
the National Weather Service website at weather.gov/desmoines for
further details.

Thunderstorms are possible tonight. An isolated severe storm with
60 mph winds may occur. Locally heavy rainfall is possible, mainly
north of Highway 30.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Thunderstorm chances will continue Sunday through Monday morning.
The overall threat for severe weather is low but locally heavy
rainfall remains possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated today.

IAZ004>007-015>017-070900-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
358 AM CDT Sat Aug 6 2022

This Hazardous Weather Outlook is for portions of north central
Iowa.

.DAY ONE...Today and tonight

Thunderstorms are possible this afternoon and overnight. A few
severe storms with damaging wind gusts are possible. Locally heavy
rainfall may also occur.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Thunderstorms chances continue Sunday and Sunday night with a few
areas of heavy rain again possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible later this afternoon and tonight.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 3:25 PM CDTHeat AdvisoryDMXAdair, Adams, Appanoose, Cass, Clarke, Davis and 9 more29 hr
Aug 6, 4:57 PM CDTSevere Thunderstorm WarningDMXKossuth, Palo Alto48 min
Aug 6, 5:47 PM CDTSevere Thunderstorm WarningDMXHumboldt, Kossuth43 min
Aug 6, 5:57 PM CDTSevere Thunderstorm WarningDMXHancock, Kossuth48 min
Aug 6, 6:34 PM CDTSpecial Weather StatementDMXHancock41 min

Nearby

Flood Watches in Iowa, 2022Every flood watch 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.