Alert archive / Iowa / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 171, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 9, 2009, 9:45 AM CDT for Boone County, Hamilton County, Story County, Iowa. It was in force for 45 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 9, 2009, 9:45 AM CDT (14:45 UTC)
- Expired
- Aug 9, 2009, 10:30 AM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Boone County, IA, Hamilton County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 47 km from the middle of the area, began a volume at 14:46 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 |
|---|---|---|---|
| Aug 9, 6:54 AM CDT | Severe Thunderstorm Watch | SPC | 7 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 Aug 9, 6:20 AM CDT, 3 hours 25 minutes earlier.
Area forecast discussion, Aug 9, 6:20 AM CDT, 3 hours 25 minutes before
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</html>Hazardous weather outlook, Aug 9, 9:04 AM CDT, 41 minutes before
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</html>In the hours before
Local storm report, Aug 9, 9:20 AM CDT, 25 minutes before
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</html>Local storm report, Aug 9, 9:23 AM CDT, 22 minutes before
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</html>Local storm report, Aug 9, 9:26 AM CDT, 19 minutes before
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<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.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>Local storm report, Aug 9, 9:29 AM CDT, 16 minutes before
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<body>
<main class="wrap">
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<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.
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</html>Local storm report, Aug 9, 9:39 AM CDT, 6 minutes before
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</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.
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</html>Local storm report, Aug 9, 9:41 AM CDT, 4 minutes before
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<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>
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<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:32 AM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 43 min |
| Aug 9, 8:10 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Greene, Sac | 50 min |
| Aug 9, 8:50 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 55 min |
| Aug 9, 9:30 AM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 60 min |
| Aug 9, 10:07 AM CDT | Severe Thunderstorm Warning | DMX | Franklin, Grundy, Hamilton, Hardin, Marshall, Story | 53 min |
| Aug 9, 10:38 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Butler, Grundy, Marshall, Tama | 67 min |
| Aug 9, 11:05 AM CDT | Tornado Warning | DMX | Black Hawk, Grundy | 40 min |
| Aug 9, 11:46 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 18 min |
| Aug 9, 3:35 PM CDT | Flash Flood Watch | DMX | Black Hawk, Bremer, Grundy, Hardin, Tama | 5 hr |
| Aug 9, 4:00 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 45 min |
| Aug 9, 4:24 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 36 min |
| Aug 9, 5:06 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 39 min |
| Aug 9, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Clarke, Madison, Union, Warren | 57 min |
| Aug 9, 5:26 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 49 min |
| Aug 9, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Marion, Warren | 41 min |
| Aug 9, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 38 min |
| Aug 9, 5:53 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk | 52 min |
| Aug 9, 6:04 PM CDT | Areal Flood Advisory | DMX | Polk, Warren | 2 hr |
| Aug 9, 6:15 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Warren | 45 min |
| Aug 9, 6:17 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold, Union | 43 min |
| Aug 9, 6:25 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Poweshiek | 50 min |
| Aug 9, 6:28 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 47 min |
| Aug 9, 6:33 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 57 min |
| Aug 9, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Tama | 51 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2009Every severe thunderstorm warning in 2009
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.