Alert archive / Iowa / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 20, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 7, 1997, 5:58 PM CDT for Montgomery County, Page County, Iowa. It was in force for 62 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
- May 7, 1997, 5:58 PM CDT (22:58 UTC)
- Expired
- May 7, 1997, 7:00 PM CDT
- In force
- 62 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
Counties Montgomery County, IA, Page County, IA
The radar
The Omaha radar (KOAX), 113 km from the middle of the area, began a volume at 22:58 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 |
|---|---|---|---|
| May 7, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.0 hours before the alert went out and 113 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, May 7, 3:57 PM CDT, 2 hours 1 minute before
NEZ034-044-045-051-IAZ043-072200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 355 PM CDT WED MAY 7 1997 ...SEVERE THUNDERSTORM WATCH 261 HAS BEEN CANCELLED FOR A PART OF EAST CENTRAL NEBRASKA AND WEST CENTRAL IOWA... A LINE OF STRONG TO SEVERE THUNDERSTORMS WAS ORGANIZING FROM SOUTHWEST OF OMAHA NORTHEAST TO EASTERN HARRISON COUNTY IOWA. THE THREAT OF SEVERE THUNDERSTORMS NORTHWEST OF THIS AREA HAS DIMINISHED. THUS THE SEZVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR SAUNDERS...DODGE...WASHINGTON AND BURT COUNTIES OF EASTERN NEBRASKA AND FOR MONONA COUNTY IOWA. CHERMOK
Special weather statement, May 7, 5:30 PM CDT, 28 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, May 7, 5:31 PM CDT, 27 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>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 4:49 AM CDT | Severe Thunderstorm Warning | OAX | Wayne | 46 min |
| May 7, 3:01 PM CDT | Severe Thunderstorm Warning | OAX | Douglas | 64 min |
| May 7, 3:58 PM CDT | Severe Thunderstorm Warning | OAX | Sarpy | 47 min |
| May 7, 4:04 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Pawnee | 61 min |
| May 7, 4:06 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha | 49 min |
| May 7, 4:09 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 66 min |
| May 7, 4:13 PM CDT | Tornado Warning | OAX | Lancaster | 47 min |
| May 7, 4:21 PM CDT | Tornado Warning | OAX | Gage | 39 min |
| May 7, 4:29 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 61 min |
| May 7, 4:40 PM CDT | Tornado Warning | OAX | Johnson, Otoe | 65 min |
| May 7, 3:36 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 64 min |
| May 7, 4:16 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 64 min |
| May 7, 4:49 PM CDT | Tornado Warning | OAX | Mills | 66 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1997Every severe thunderstorm warning in 1997
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.