Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 166, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jul 10, 2009, 5:23 AM CDT for Cedar County, Knox County, Nebraska. It was in force for 52 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
- Jul 10, 2009, 5:23 AM CDT (10:23 UTC)
- Expired
- Jul 10, 2009, 6:15 AM CDT
- In force
- 52 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
Counties Cedar County, NE, Knox County, NE
The radar
The Sioux Falls radar (KFSD), 128 km from the middle of the area, began a volume at 10:24 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
Omaha, NE (KOAX), launched 00:00Z, 10.4 hours before the alert went out and 175 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
- 1878 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1113 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Jul 10, 3:31 AM CDT, 1 hour 52 minutes earlier.
Area forecast discussion, Jul 10, 3:31 AM CDT, 1 hour 52 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, Jul 9, 7:23 PM CDT, 10 hours before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 723 PM CDT THU JUL 9 2009 IAZ069-079-080-090-091-NEZ050>053-065>068-078-088>093-100700- BUTLER-CASS-DOUGLAS-FREMONT IA-GAGE-JEFFERSON-JOHNSON-LANCASTER- MILLS IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-POTTAWATTAMIE IA- RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD- 723 PM CDT THU JUL 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST NEBRASKA AND EXTREME SOUTHWEST IOWA. .DAY ONE...TONIGHT AND FRIDAY THERE IS A SMALL CHANCE A FEW SEVERE THUNDERSTORMS WILL DEVELOP THIS EVENING OVER AREAS GENERALLY ALONG AND SOUTH OF THE INTERSTATE 80 CORRIDOR THIS EVENING...WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY HAZARDS. THUNDERSTORM DEVELOPMENT IS IN ASSOCIATION WITH A STRONG COLD FRONT SWEEPING INTO THE CENTRAL PLAINS AND MID MISSISSIPPI VALLEY TONIGHT. THUNDERSTORM CHANCES WILL CONTINUE ON FRIDAY WITH POSSIBLE SEVERE THUNDERSTORMS IN THE AFTERNOON...GENERALLY SOUTH OF A LINE FROM ABOUT AVOCA IOWA TO DAVID CITY. LARGE HAIL AND DAMAGING WINDS THE MAIN HAZARDS. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH THURSDAY THUNDERSTORM CHANCES WILL CONTINUE OVER THE MAJORITY OF THE OUTLOOK AREA THROUGH THE FORECAST PERIOD. .SPOTTER INFORMATION STATEMENT... SEVERE WEATHER SPOTTERS MAY NEED THIS EVENING AS WELL AS FRIDAY AFTERNOON. IAZ055-056-NEZ016>018-030>034-042>045-100700- ANTELOPE-BOONE-BURT-COLFAX-CUMING-DODGE-HARRISON IA-MADISON-PIERCE- PLATTE-SHELBY IA-STANTON-WASHINGTON-WAYNE- 723 PM CDT THU JUL 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST NEBRASKA AND WEST CENTRAL IOWA. .DAY ONE...TONIGHT AND FRIDAY SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM THIS MORNING. THERE IS A REASONABLY GOOD CHANCE SEVERE THUNDERSTORMS WILL DEVELOP OVER THE OUTLOOK AREA THIS EVENING. AMPLE INSTABILITY...MOISTURE... SHEAR WILL BE AVAILABLE FOR STORMS TO PRODUCE A COMBINATION OF STRONG DAMAGING WINDS...LARGE HAIL...AND EVEN ISOLATED TORNADOES. AN INCREASING LOW LEVEL JET WILL FURTHER ENHANCING THE SEVERE POTENTIAL. STORM DEVELOPMENT IS IN ASSOCIATION WITH A STRONG COLD FRONT SWEEPING INTO THE CENTRAL PLAINS AND MID MISSISSIPPI VALLEY TONIGHT. THUNDERSTORM CHANCES WILL CONTINUE ON FRIDAY WITH POSSIBLE SEVERE THUNDERSTORMS IN THE AFTERNOON...GENERALLY SOUTH OF A LINE FROM ABOUT AVOCA IOWA TO DAVID CITY. LARGE HAIL AND DAMAGING WINDS THE MAIN HAZARDS. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH THURSDAY THUNDERSTORM CHANCES WILL CONTINUE OVER THE MAJORITY OF THE OUTLOOK AREA THROUGH THE FORECAST PERIOD. .SPOTTER INFORMATION STATEMENT... SEVERE WEATHER SPOTTERS MAY NEED THIS EVENING AS WELL AS FRIDAY AFTERNOON. IAZ043-NEZ011-012-015-100700- CEDAR-KNOX-MONONA IA-THURSTON- 723 PM CDT THU JUL 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST NEBRASKA AND WEST CENTRAL IOWA. .DAY ONE...TONIGHT AND FRIDAY SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM THIS MORNING. FLASH FLOOD WATCH IN EFFECT UNTIL 6 AM FRIDAY MORNING. THERE IS A REASONABLY GOOD CHANCE SEVERE THUNDERSTORMS WILL DEVELOP OVER THE OUTLOOK AREA THIS EVENING. AMPLE INSTABILITY...MOISTURE... SHEAR WILL BE AVAILABLE FOR STORMS TO PRODUCE A COMBINATION OF STRONG DAMAGING WINDS...LARGE HAIL...AND EVEN ISOLATED TORNADOES. AN INCREASING LOW LEVEL JET WILL FURTHER ENHANCING THE SEVERE POTENTIAL. STORM DEVELOPMENT IS IN ASSOCIATION WITH A STRONG COLD FRONT SWEEPING INTO THE CENTRAL PLAINS AND MID MISSISSIPPI VALLEY TONIGHT. THUNDERSTORM CHANCES WILL CONTINUE ON FRIDAY WITH POSSIBLE SEVERE THUNDERSTORMS IN THE AFTERNOON...GENERALLY SOUTH OF A LINE FROM ABOUT AVOCA IOWA TO DAVID CITY. LARGE HAIL AND DAMAGING WINDS THE MAIN HAZARDS. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH THURSDAY THUNDERSTORM CHANCES WILL CONTINUE OVER THE MAJORITY OF THE OUTLOOK AREA THROUGH THE FORECAST PERIOD. .SPOTTER INFORMATION STATEMENT... SEVERE WEATHER SPOTTERS MAY BE NEED THIS EVENING MAIN IN COUNTIES NORTH OF INTERSTATE 80...AND POSSIBLY FRIDAY AFTERNOON SOUTH OF INTERSTATE 80. DEE
In the hours before
Local storm report, Jul 10, 3:06 AM CDT, 2 hours 17 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>Local storm report, Jul 10, 3:10 AM CDT, 2 hours 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 |
|---|---|---|---|---|
| Jul 10, 2:36 AM CDT | Severe Thunderstorm Warning | OAX | Richardson | 39 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.