Alert archive / Iowa / Special Weather Statements in 2022
Special Weather Statement, NWS Des Moines, IA
NWS Des Moines, IA issued this special weather statement at Aug 7, 2022, 12:40 AM CDT for Cerro Gordo County, Iowa. It was in force for 65 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
- Aug 7, 2022, 12:40 AM CDT (05:40 UTC)
- Expired
- Aug 7, 2022, 1:45 AM CDT
- In force
- 65 min
- Issued by
- NWS Des Moines, IA
- Hail
- 0.00 in
- Wind
- 30
County Cerro Gordo County, IA
The radar
The Des Moines radar (KDMX), 144 km from the middle of the area, began a volume at 05:40 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 00:00Z, 5.7 hours before the alert went out and 223 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.
- Mixed-layer CAPE
- 93 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 508 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>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 Aug 6, 11:41 PM CDT, 59 minutes earlier.
Area forecast discussion, Aug 6, 11:41 PM CDT, 59 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Aug 6, 9:04 PM CDT, 3 hours 36 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 904 PM CDT Sat Aug 6 2022 IAZ023>028-033>039-044>050-057>062-073>075-080215- 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-Warren-Marion-Mahaska- 904 PM CDT Sat Aug 6 2022 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight Thunderstorms are possible north 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 is possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible later tonight. IAZ004>007-015>017-080215- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- 904 PM CDT Sat Aug 6 2022 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight A Flood Watch is in effect for tonight through Sunday morning. 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. .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 is possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible later tonight. IAZ070>072-081>086-092>097-080215- Cass-Adair-Madison-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor- Ringgold-Decatur-Wayne-Appanoose-Davis- 904 PM CDT Sat Aug 6 2022 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight A Heat Advisory is in effect for the area Sunday afternoon. Please refer to the National Weather Service website at weather.gov/desmoines for further details. A few scattered thunderstorms are possible tonight but are expected to remain further north. Severe weather threat is low but locally heavy rainfall is possible. .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. Dodson
In the hours before
Special weather statement, Aug 6, 7:05 PM CDT, 5 hours 35 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Aug 7, 12:40 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Des Moines IA
1240 AM CDT Sun Aug 7 2022
IAZ017-026>028-070645-
Bremer IA-Cerro Gordo IA-Franklin IA-Butler IA-
1240 AM CDT Sun Aug 7 2022
...A strong thunderstorm will impact portions of northwestern Bremer,
northern Franklin, northern Butler and southern Cerro Gordo Counties
through 145 AM CDT...
At 1240 AM CDT, Doppler radar was tracking a strong thunderstorm near
Rockwell, or 14 miles south of Mason City, moving east at 25 mph.
HAZARD...Very heavy rainfall has occurred with these storms with
some areas receiving over 3 inches of rain already. An
additional 1-2 inches is possible with these storms. Winds
in excess of 30 mph are also possible.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Ponding of ponding of water on roadways,
low visibilities, and rises in small streams and creeks.
Locations impacted include...
Greene.
This includes Interstate 35 between mile markers 174 and 190.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4275 9245 4286 9350 4287 9350 4309 9343
4306 9302 4291 9302 4291 9243
TIME...MOT...LOC 0540Z 275DEG 21KT 4295 9311
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
DonavonThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 7:05 PM CDT | Special Weather Statement | DMX | Cerro Gordo | 25 min |
| Aug 7, 3:24 AM CDT | Flash Flood Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 6 hr |
| Aug 7, 5:48 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 42 min |
| Aug 7, 6:28 PM CDT | Special Weather Statement | DMX | Audubon, Guthrie | 47 min |
| Aug 7, 6:38 PM CDT | Special Weather Statement | DMX | Polk | 52 min |
Nearby
Special Weather Statements in Iowa, 2022Every 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.