Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 302, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Aug 12, 2011, 4:29 AM CDT for Boone County, Madison County, Platte County, Nebraska. It was in force for 46 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 12, 2011, 4:29 AM CDT (09:29 UTC)
- Expired
- Aug 12, 2011, 5:15 AM CDT
- In force
- 46 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, NE, Madison County, NE, Platte County, NE
The radar
The Omaha radar (KOAX), 122 km from the middle of the area, began a volume at 09:33 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, 9.5 hours before the alert went out and 122 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
- 417 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1393 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 12, 3:59 AM CDT, 30 minutes earlier.
Area forecast discussion, Aug 12, 3:59 AM CDT, 30 minutes before
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</html>Hazardous weather outlook, Aug 11, 4:38 PM CDT, 11 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 438 PM CDT THU AUG 11 2011 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-121145- 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- 438 PM CDT THU AUG 11 2011 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 THUNDERSTORMS ARE POSSIBLE LATER TONIGHT THROUGH FRIDAY AS A COLD FRONT APPROACHES THE AREA ACCOMPANIED BY A SERIES OF WEAK UPPER LEVEL DISTURBANCES. A LARGE THUNDERSTORM COMPLEX IS EXPECTED TO MOVE FROM CENTRAL SOUTH DAKOTA INTO WESTERN AND CENTRAL NEBRASKA THIS EVENING THEN SPREAD INTO EASTERN NEBRASKA AND SOUTHWEST IOWA LATE TONIGHT. LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY HAZARDS ASSOCIATED WITH THESE STORMS...HOWEVER AND ISOLATED TORNADO IS ALSO POSSIBLE THIS EVENING. THUNDERSTORMS WILL REMAIN POSSIBLE ON FRIDAY AS THE COLD FRONT MOVES INTO THE AREA. SOME STORMS MAY BE SEVERE FRIDAY AFTERNOON WITH LARGE HAIL AND DAMAGING WINDS AGAIN THE PRIMARY HAZARDS. MODERATE TO MAJOR FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH THURSDAY THUNDERSTORMS ARE FORECAST AGAIN SUNDAY NIGHT THROUGH MONDAY NIGHT. MODERATE TO MAJOR FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER FOR THE NEXT SEVERAL WEEKS. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION MAY BE NEEDED LATER TONIGHT ACROSS EASTERN NEBRASKA AND SOUTHWEST IOWA. FOBERT
In the hours before
Special weather statement, Aug 11, 11:40 PM CDT, 4 hours 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1140 PM CDT THU AUG 11 2011 IAZ069-079-NEZ050>053-065>068-120545- BUTLER NE-CASS NE-DOUGLAS NE-LANCASTER NE-MILLS IA-OTOE NE-POTTAWATTAMIE IA-SARPY NE-SAUNDERS NE-SEWARD NE- 1140 PM CDT THU AUG 11 2011 ...SPECIAL WEATHER STATEMENT FOR EASTERN SEWARD...SOUTHERN SAUNDERS...SARPY...NORTHWESTERN OTOE...LANCASTER...DOUGLAS...CASS... SOUTHERN BUTLER...MILLS AND WESTERN POTTAWATTAMIE COUNTIES UNTIL 1245 AM CDT... AT 1138 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTH OF UNDERWOOD TO YUTAN TO ULYSSES...AND MOVING SOUTHEAST AT 35 MPH. WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... OMAHA... LINCOLN... BELLEVUE... TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. FOBERT
Special weather statement, Aug 12, 12:21 AM CDT, 4 hours 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1221 AM CDT FRI AUG 12 2011 NEZ065-066-078-089-120600- GAGE NE-LANCASTER NE-SALINE NE-SEWARD NE- 1221 AM CDT FRI AUG 12 2011 ...SPECIAL WEATHER STATEMENT FOR SOUTHEASTERN SEWARD...EASTERN SALINE...LANCASTER AND NORTHERN GAGE COUNTIES UNTIL 100 AM CDT... AT 1216 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES EAST OF GARLAND TO BEAVER CROSSING...AND MOVING SOUTHEAST AT 25 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... LINCOLN... MILFORD... CRETE... HICKMAN... WILBER... HALLAM... PAWNEE STATE RECREATION AREA... BLUE RIVER STATE RECREATION AREA... CONESTOGA STATE RECREATION AREA... DENTON... BLUESTEM STATE RECREATION AREA... CHERMOK
Special weather statement, Aug 12, 12:46 AM CDT, 3 hours 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1246 AM CDT FRI AUG 12 2011 NEZ066-068-078-089>091-120630- GAGE NE-JOHNSON NE-LANCASTER NE-NEMAHA NE-OTOE NE-SALINE NE- 1246 AM CDT FRI AUG 12 2011 ...SPECIAL WEATHER STATEMENT FOR SALINE...OTOE...NORTHWESTERN NEMAHA...SOUTHERN LANCASTER...NORTHERN JOHNSON AND NORTHERN GAGE COUNTIES UNTIL 130 AM CDT... AT 1244 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM AVOCA TO UNADILLA TO FRIEND...AND MOVING SOUTHEAST AT 35 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... CRETE... HICKMAN... SYRACUSE... HALLAM... FIRTH... NEBRASKA CITY... WILBER... WESTERN... CLATONIA... STERLING... PICKRELL... JOHNSON... TECUMSEH... CHERMOK
Local storm report, Aug 12, 2:00 AM CDT, 2 hours 29 minutes before
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</html>Special weather statement, Aug 12, 2:09 AM CDT, 2 hours 20 minutes before
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</html>Local storm report, Aug 12, 2:43 AM CDT, 1 hour 46 minutes before
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</html>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 8:03 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Knox | 42 min |
| Aug 11, 8:46 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Cedar, Knox, Pierce, Wayne | 44 min |
| Aug 12, 1:06 AM CDT | Severe Thunderstorm Warning | OAX | Johnson, Nemaha, Otoe, Pawnee, Richardson | 39 min |
| Aug 12, 1:44 AM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Richardson | 46 min |
| Aug 12, 5:26 AM CDT | Severe Thunderstorm Warning | OAX | Boone, Platte | 24 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 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.