Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 40, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 11, 2018, 3:34 AM CDT for 5 counties in Nebraska. It was in force for 26 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 11, 2018, 3:34 AM CDT (08:34 UTC)
- Expired
- May 11, 2018, 4:00 AM CDT
- In force
- 26 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Gage County, NE, Jefferson County, NE, Lancaster County, NE, Saline County, NE, Seward County, NE
The radar
The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 08:34 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 11, 1:50 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Topeka, KS (KFOE), launched 00:00Z, 8.6 hours before the alert went out and 204 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
- 577 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 2178 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at May 11, 3:01 AM CDT, 33 minutes earlier.
Area forecast discussion, May 11, 3:01 AM CDT, 33 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, May 10, 3:42 PM CDT, 11 hours 52 minutes before
Hazardous Weather Outlook National Weather Service Omaha/Valley NE 342 PM CDT Thu May 10 2018 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-111045- Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler- Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline- Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 342 PM CDT Thu May 10 2018 This Hazardous Weather Outlook is for portions of southwest Iowa...west central Iowa...east central Nebraska...northeast Nebraska and southeast Nebraska. .DAY ONE...Tonight and Friday Isolated strong to severe storms will be possible after 9 PM, mainly over northeast Nebraska. Locally damaging wind gusts will be the primary hazard. Isolated severe storms are possible again late Friday afternoon into evening from portions of southeast and east-central Nebraska into southwest Iowa. .DAYS TWO THROUGH SEVEN...Friday night through Thursday Off-and-on thunderstorm chances remain in the forecast this weekend through the middle of next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely not be needed tonight or Friday.
In the hours before
Special weather statement, May 11, 12:51 AM CDT, 2 hours 43 minutes before
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
1251 AM CDT FRI MAY 11 2018
NEZ030-110630-
Boone NE-
1251 AM CDT FRI MAY 11 2018
...Significant Weather Advisory for BOONE COUNTY UNTIL 130 AM CDT...
At 1250 AM CDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Wolbach, or 32 miles east of Ord, moving northeast
at 40 mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
Albion, St. Edward, Cedar Rapids, Primrose, Loretto and The Highway
14 And 56 Junction.
LAT...LON 4167 9829 4191 9784 4153 9783 4153 9788
4151 9789 4151 9804 4150 9804 4150 9809
4148 9810 4148 9829
TIME...MOT...LOC 0550Z 240DEG 34KT 4147 9833
FOBERTSpecial weather statement, May 11, 2:27 AM CDT, 1 hour 7 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 11, 3:21 AM CDT, 13 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 11, 12:51 AM CDT | Special Weather Statement | OAX | Boone | 39 min |
| May 11, 1:57 AM CDT | Severe Thunderstorm Warning | OAX | Butler, Gage, Jefferson, Lancaster, Saline, Saunders and 1 more | 33 min |
| May 11, 2:27 AM CDT | Special Weather Statement | OAX | Gage, Lancaster, Saline, Seward | 48 min |
| May 11, 3:21 AM CDT | Special Weather Statement | OAX | Gage, Jefferson, Saline | 39 min |
| May 11, 3:57 AM CDT | Special Weather Statement | OAX | Gage, Johnson, Lancaster | 48 min |
| May 11, 4:23 AM CDT | Special Weather Statement | OAX | Lancaster, Seward | 52 min |
| May 11, 4:33 AM CDT | Special Weather Statement | OAX | Johnson, Nemaha, Pawnee, Richardson | 42 min |
| May 11, 6:20 AM CDT | Special Weather Statement | OAX | Montgomery | 40 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2018Every severe thunderstorm warning in 2018
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.