Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 368, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Aug 28, 2011, 11:08 AM CDT for Burt County, Thurston County, Nebraska; Monona County, Iowa. 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
- Aug 28, 2011, 11:08 AM CDT (16:08 UTC)
- Expired
- Aug 28, 2011, 12:00 PM CDT
- In force
- 52 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Monona County, IA, Burt County, NE, Thurston County, NE
The radar
The Omaha radar (KOAX), 78 km from the middle of the area, began a volume at 16:11 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 28, 8:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 4.1 hours before the alert went out and 78 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
- 1560 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
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 Aug 28, 3:14 AM CDT, 7 hours 54 minutes earlier.
Area forecast discussion, Aug 28, 3:14 AM CDT, 7 hours 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 314 AM CDT SUN AUG 28 2011 .DISCUSSION... SYNOPSIS...00Z UPPER AIR ANALYSIS INDICATED MEAN SOUTHERN PLAINS UPPER LEVEL RIDGE HAD RETROGRADED A TOUCH WITH WEAK H5 HEIGHT FALLS NOTED FM THE UPPER TO LOWER MS RIVER VALLEY. LITTLE IN THE WAY OF SHORTWAVE TROUGHS WERE VISIBLE IN THE FLOW...BUT A SUBTLE FEATURE APPEARS TO BE OVER ND AT 00Z. SEASONABLY STEEP LAPSE RATES EXTNDD ACROSS PARTS OF THE PLAINS WITH H5 TO H7 DELTA T'S OF +20 FROM OMA/TOP WEST TO THE ROCKIES. BELOW THE LAPSE RATES...MOISTURE WAS FAIRLY SUBSTANDARD WITH AN AXIS OF GENERAL +5 TO 10 C FROM DVN TO LBF TO BIS. 07Z SFC ANLYS INDICATED LOW PRES OVER SW SD WITH THE SURFACE RIDGE AXIS FM CNTRL MN TO SE NEB. FORECAST...SOMEWHAT OF A DIFFICULT FOR THE DAY ONE PERIOD WITH CONVECTIVE EVOLUTION THE MOST UNCERTAIN ASPECT. MODELS ARE CONSISTENT IN TAKING WEAK PERTURBATION IN ND SE THROUGH MN AND INTO IA TODAY. THIS DOES PROVIDE SOME LARGE-SCALE FORCING FOR ASCENT TODAY SEEN IN THE 500-300 MB Q-VECTORS...AS WELL AS INCREASE THE MID-HIGH LEVEL FLOW. GIVEN THE INCREASED MID-LEVEL FLOW OF 40-50 KT ON TOP OF LOW-LEVEL SOUTHEAST SURFACE WINDS...THIS CREATES BULK VECTOR DIFFERENCES OF 30-40 KT TODAY. IN ADDITION...THE ATMOSPHERE DOES HAVE THE POTENTIAL TO BECOME MODERATELY UNSTABLE TODAY GIVEN THE MID LEVEL LAPSE RATES JUXTAPOSED WITH THE MARGINAL LOW-LEVEL MOISTURE PER POINT AS INDICATED IN FORECAST SOUNDINGS. THE MOST LIKELY SCENARIO ATTM...WHICH THE NEW FORECAST WILL REFLECT...IS FOR CURRENT MCS OVER SOUTHERN ND TO CONTINUE TO TRACK TO THE SOUTHEAST THROUGH THE REST OF THE NIGHT ENCOUNTERING BETTER LOW- LEVEL MOISTURE/INSTABILITY OVER SOUTH DAKOTA. ADDITIONAL CONVECTION MAY ALSO DEVELOP AHEAD OF THIS SYSTEM LATE TONIGHT IN ERN SD AS WELL. A COMBINATION OF THIS ACTIVITY WILL LIKELY MOVE INTO NORTHEAST NEB BY MID MORNING...AND CONTINUE TO MOVE DOWN THE MO RIVER THROUGH THE DAY WITH THE SUPPORT FOR THE LARGE-SCALE ASCENT...WHICH MAY HELP TO OFF-SET THE WEAKENING LOW LEVEL JET THROUGH THE MORNING. THOUGH WE EXPECT AN OVERALL WEAKENING TREND SHOULD BE OCCURRING AS THE SYSTEM MOVES THROUGH THE FA. GIVEN THE WIND FIELD AND MID-LEVEL LAPSE RATES...SOME ISOLATED SEVERE WX IS POSSIBLE...BUT THIS SHOULD GENERALLY BE A LIMITED THREAT...AND MOST LIKELY OVER NORTHEAST NEB IN THE MORNING. THE SYSTEM WILL ALSO CREATE A DIFFICULT TEMPERATURE FORECAST TODAY WITH THE EFFECTS OF CLOUDS/PRECIP. HAVE INCREASED GOING HIGHS IN THE SOUTH WHERE THEY SHOULD BE CONVECTION FREE FOR A GOOD PART OF THE DAY...AND LOWERED IN THE NORTH. MOST OF THE CONVECTION SHOULD BE SOUTH AND WEST OF THE FA BY TONIGHT AND REMOVED POPS AFTER 00Z FOR ALL BUT THE FAR SW CWA. SURFACE HIGH SETTLES INTO THE NORTH AFTER 06Z WITH CLEARING SKIES. WE WENT AHEAD AND INSERTED SOME PATCHY FOG AFTER MIDNIGHT FOR NE NEB AND W-CNTRL IA WITH THE THINKING THAT IT WILL RAIN THERE TODAY. IF THAT DOESN'T HAPPEN...WE MAY NOT GET MUCH FOG. RETURN FLOW KICKS IN AGAIN ON MONDAY NIGHT WITH SCT CONVECTION AGAIN A GOOD BET MOVING FM W-E ACROSS THE FORECAST INTO THE DAY ON TUES AND VERY FEW CHANGES WERE MADE TO THIS PART OF THE FORECAST. DID LOWER POPS TUES AFTN AND REMOVED THEM FOR TUES NIGHT WITH WARMING MID LEVEL TEMPERATURES AND LACK OF FORCING LIMITING CONVECTIVE CHANCES. NO CHANGES WERE MADE PAST TUE NIGHT. BOUSTEAD && .AVIATION... 06Z TAFS A FEW AREAS OF CONCERN FOR THE TAF CYCLE. UNDER CLEAR SKIES AND LIGHT WINDS...KOMA/KLNK MAY SEE RESTRICTED VIS THIS MORNING...AT LEAST UNTIL CLOUDS ARRIVE. HAVE INCLUDED TEMPO GROUPS FOR MVFR VIS AT BOTH SITES. TODAY...SHOWERS AND THUNDERSTORMS SHOULD MOVE DOWN THE MISSOURI RIVER VALLEY...AFFECTING MAINLY KOMA BUT POSSIBLY KOFK/KLNK ON THE MARGINS OF THIS ACTIVITY. LATER THIS AFTERNOON...NEW CONVECTION MAY DEVELOP FURTHER WESTWARD...AFFECTING MAINLY KLNK AND POSSIBLY KOMA. DUE TO UNCERTAINTY REGARDING COVERAGE...HAVE LIMITED MENTION TO SHRA/CB IN TEMPO/PROB30 GROUPS FOR NOW. TAF SITES SHOULD QUIET FROM NORTH TO SOUTH BETWEEN 00-06Z MONDAY. MAYES && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. &&
Hazardous weather outlook, Aug 28, 3:53 AM CDT, 7 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 353 AM CDT SUN AUG 28 2011 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-282300- 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- 353 AM CDT SUN AUG 28 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL LIKELY MOVE INTO NORTHEAST NEBRASKA BY MID MORNING. THE THUNDERSTORMS ARE EXPECTED TO SPREAD SOUTHEAST INTO EAST CENTRAL NEBRASKA AND WESTERN IOWA BY EARLY AFTERNOON. OTHER ISOLATED THUNDERSTORMS MAY DEVELOP THIS AFTERNOON OVER SOUTHEAST NEBRASKA. WIDESPREAD SEVERE WEATHER IS NOT EXPECTED TODAY...BUT AN ISOLATED STRONG TO MARGINALLY SEVERE STORM WILL BE POSSIBLE THIS MORNING INTO EARLY THIS AFTERNOON...MAINLY OVER NORTHEAST NEBRASKA AND WEST CENTRAL IOWA. LARGE HAIL TO QUARTER SIZE WOULD BE THE MAIN THREAT. ISOLATED THUNDERSTORMS MAY CONTINUE INTO THE EVENING HOURS OVER SOUTHEAST NEBRASKA....BUT WILL LIKELY END BY MIDNIGHT. MINOR TO MODERATE FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE OF THUNDERSTORMS FROM MONDAY NIGHT THROUGH TUESDAY AS A WARM FRONT MOVES THROUGH THE AREA. MORE STORMS COULD OCCUR LATER IN THE WEEK. MINOR TO MODERATE FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION SHOULD NOT BE NEEDED TODAY OR TONIGHT.
In the hours before
Special weather statement, Aug 28, 7:57 AM CDT, 3 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 757 AM CDT SUN AUG 28 2011 NEZ011-012-281345- CEDAR NE-KNOX NE- 757 AM CDT SUN AUG 28 2011 ...SPECIAL WEATHER STATEMENT FOR EASTERN KNOX AND CENTRAL CEDAR COUNTIES UNTIL 845 AM CDT... AT 752 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM 10 MILES NORTHEAST OF VERDIGRE...OR 28 MILES SOUTHWEST OF YANKTON...MOVING EAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BLOOMFIELD... WAUSA... HARTINGTON... THE HIGHWAY 81 AND 84 JUNCTION... MAGNET... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. DEWALD
Special weather statement, Aug 28, 8:58 AM CDT, 2 hours 10 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 28, 9:31 AM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 931 AM CDT SUN AUG 28 2011 IAZ043-NEZ015-281515- MONONA IA-THURSTON NE- 931 AM CDT SUN AUG 28 2011 ...SPECIAL WEATHER STATEMENT FOR EASTERN THURSTON AND MONONA COUNTIES UNTIL 1015 AM CDT... AT 926 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR WINNEBAGO...OR 21 MILES SOUTH OF SIOUX CITY...MOVING EAST AT 40 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MACY... WHITING... ONAWA... MOORHEAD... UTE... LEWIS AND CLARK STATE PARK... KENNEBEC... TURIN... CASTANA... SOLDIER... THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. DEWALD
Special weather statement, Aug 28, 9:43 AM CDT, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 943 AM CDT SUN AUG 28 2011 NEZ012-281530- CEDAR NE- 943 AM CDT SUN AUG 28 2011 ...SPECIAL WEATHER STATEMENT FOR NORTHEASTERN CEDAR COUNTY UNTIL 1030 AM CDT... AT 941 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR MISSION HILL...OR 5 MILES EAST OF YANKTON...MOVING SOUTHEAST AT 35 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... WYNOT... ST. HELENA... OBERT... THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. DEWALD
Special weather statement, Aug 28, 10:13 AM CDT, 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1013 AM CDT SUN AUG 28 2011 NEZ012-281600- CEDAR NE- 1013 AM CDT SUN AUG 28 2011 ...SPECIAL WEATHER STATEMENT FOR EASTERN CEDAR COUNTY UNTIL 1100 AM CDT... AT 1009 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR HARTINGTON...OR 17 MILES SOUTHWEST OF VERMILLION...MOVING SOUTHEAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... COLERIDGE AND RURAL AREAS OF EAST CENTRAL CEDAR COUNTY... THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. DEWALD
Special weather statement, Aug 28, 10:54 AM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1054 AM CDT SUN AUG 28 2011 IAZ043-NEZ015-034-281645- BURT NE-MONONA IA-THURSTON NE- 1054 AM CDT SUN AUG 28 2011 ...SPECIAL WEATHER STATEMENT FOR THURSTON...NORTHERN BURT AND NORTHWESTERN MONONA COUNTIES UNTIL 1145 AM CDT... AT 1052 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SALIX TO 6 MILES NORTHWEST OF PENDER...AND MOVING SOUTHEAST AT 40 MPH. WIND GUSTS UP TO 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... WINNEBAGO... PENDER... WALTHILL... MACY... WHITING... DECATUR... ONAWA... THURSTON... ROSALIE... RODNEY... KENNEBEC... LEWIS AND CLARK STATE PARK... MAPLETON... CASTANA... THESE STORMS MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. DEWALD
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 8:22 AM CDT | Severe Thunderstorm Warning | OAX | Cedar, Knox, Pierce | 38 min |
| Aug 28, 11:28 AM CDT | Severe Thunderstorm Warning | OAX | Burt, Washington | 47 min |
| Aug 28, 11:30 AM CDT | Areal Flood Advisory | OAX | Thurston | 3 hr |
| Aug 28, 11:51 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 39 min |
| Aug 28, 12:09 PM CDT | Flash Flood Warning | OAX | Pottawattamie | 92 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2011Severe Thunderstorm Warnings in Iowa, 2011Every severe thunderstorm warning in 2011
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.