Alert archive / Nebraska / Tornado Warnings in 2012

Tornado Warning 6, NWS Omaha, NE

April 14, 2012Lancaster County, Seward County, Nebraska

NWS Omaha, NE issued this tornado warning at Apr 14, 2012, 11:31 PM CDT for Lancaster County, Seward County, Nebraska. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 14, 2012, 11:31 PM CDT (04:31 UTC)
Expired: Apr 15, 2012, 12:00 AM CDT
In force: 29 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon

Counties Lancaster County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 56 km from the middle of the area, began a volume at 04:34 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.

What was reported inside it

Time	Report	Where	Remark
Apr 15, 12:08 AM CDT	HAIL 0.75	4 Sw Waverly, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 14, 6:27 PM CDT	Tornado Watch PDS	SPC	9 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.5 hours before the alert went out and 55 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 483 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

890 
WFUS53 KOAX 150431
TOROAX

NEC109-159-150500-
/O.NEW.KOAX.TO.W.0006.120415T0431Z-120415T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1131 PM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL SEWARD COUNTY IN SOUTHEASTERN NEBRASKA...
  LANCASTER COUNTY IN SOUTHEASTERN NEBRASKA...

* UNTIL 1200 AM CDT

* AT 1129 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 
  NEAR PLEASANT DALE...OR 13 MILES WEST OF LINCOLN...AND MOVING EAST 
  AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAVERLY...MALCOLM...RAYMOND...NORTHERN LINCOLN AND DAVEY. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 77 BETWEEN MILE MARKERS 77 AND 81.
 INTERSTATE 80 IN NEBRASKA NEAR MILE MARKER 388...NEAR MILE MARKER 
395...AND BETWEEN MILE MARKERS 401 AND 409.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND 
PROTECT YOURSELF FROM FLYING DEBRIS.

TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO 
NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 4091 9705 4105 9670 4105 9648 4088 9647
      4081 9700
TIME...MOT...LOC 0429Z 247DEG 46KT 4085 9694 

$$

MAYES

4 follow-up statements

703 
WWUS53 KOAX 150441
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1141 PM CDT SAT APR 14 2012

NEC159-150510-
/O.CAN.KOAX.TO.W.0006.000000T0000Z-120415T0500Z/
SEWARD NE-
1141 PM CDT SAT APR 14 2012

...THE TORNADO WARNING FOR EAST CENTRAL SEWARD COUNTY IS CANCELLED...

THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED. A 
TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM.  

LAT...LON 4083 9691 4093 9690 4105 9666 4105 9648
      4088 9647
TIME...MOT...LOC 0440Z 247DEG 46KT 4090 9679 

$$

NEC109-150500-
/O.CON.KOAX.TO.W.0006.000000T0000Z-120415T0500Z/
LANCASTER NE-
1141 PM CDT SAT APR 14 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1200 AM CDT FOR 
LANCASTER COUNTY...

AT 1138 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 7 
MILES NORTHWEST OF LINCOLN...MOVING NORTHEAST AT 55 MPH. 

LOCATIONS IMPACTED INCLUDE...
WAVERLY...MALCOLM...RAYMOND AND DAVEY. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 77 BETWEEN MILE MARKERS 77 AND 81.
 INTERSTATE 80 IN NEBRASKA NEAR MILE MARKER 395...AND BETWEEN MILE 
MARKERS 401 AND 409.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND 
PROTECT YOURSELF FROM FLYING DEBRIS.

TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO 
NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW!

&&

LAT...LON 4083 9691 4093 9690 4105 9666 4105 9648
      4088 9647
TIME...MOT...LOC 0438Z 247DEG 46KT 4090 9679 

$$

MAYES

969 
WWUS53 KOAX 150445
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1145 PM CDT SAT APR 14 2012

NEC109-150500-
/O.CON.KOAX.TO.W.0006.000000T0000Z-120415T0500Z/
LANCASTER NE-
1145 PM CDT SAT APR 14 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1200 AM CDT FOR 
LANCASTER COUNTY...

AT 1143 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. 
A TORNADO MAY DEVELOP AT ANY TIME. THIS DANGEROUS STORM WAS 
LOCATED 7 MILES NORTH OF LINCOLN...MOVING NORTHEAST AT 55 MPH. 

LOCATIONS IMPACTED INCLUDE...
WAVERLY...MALCOLM...RAYMOND...NORTHERN LINCOLN AND DAVEY. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 77 BETWEEN MILE MARKERS 77 AND 81.
 INTERSTATE 80 IN NEBRASKA NEAR MILE MARKER 395...AND BETWEEN MILE 
MARKERS 401 AND 409.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A VEHICLE 
OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT 
YOURSELF FROM FLYING DEBRIS.

TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO 
NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW!

&&

LAT...LON 4083 9691 4093 9690 4105 9666 4105 9648
      4088 9647
TIME...MOT...LOC 0443Z 247DEG 46KT 4092 9673 

$$

MAYES

350 
WWUS53 KOAX 150453
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1153 PM CDT SAT APR 14 2012

NEC109-150500-
/O.CON.KOAX.TO.W.0006.000000T0000Z-120415T0500Z/
LANCASTER NE-
1153 PM CDT SAT APR 14 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1200 AM CDT FOR 
NORTHEASTERN LANCASTER COUNTY...

AT 1148 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 
NEAR WAVERLY...OR 8 MILES NORTH OF LINCOLN...MOVING NORTHEAST AT 
55 MPH. 

LOCATIONS IMPACTED INCLUDE...
WAVERLY AND DAVEY. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 77 NEAR MILE MARKER 77.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 403 AND 409.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A VEHICLE 
OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT 
YOURSELF FROM FLYING DEBRIS.

TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO 
NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW!

&&

LAT...LON 4086 9668 4101 9671 4105 9648 4088 9647
TIME...MOT...LOC 0448Z 247DEG 46KT 4094 9666 

$$

MAYES

640 
WWUS53 KOAX 150457
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1157 PM CDT SAT APR 14 2012

NEC109-150510-
/O.EXP.KOAX.TO.W.0006.000000T0000Z-120415T0500Z/
LANCASTER NE-
1157 PM CDT SAT APR 14 2012

...THE TORNADO WARNING FOR NORTHEASTERN LANCASTER COUNTY WILL 
EXPIRE AT 1200 AM CDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING 
HAS BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN 
LIKELY AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE 
AREA. 

ADDITIONAL SEVERE THUNDERSTORM DEVELOPMENT REMAINS POSSIBLE...AND 
A TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM. 

LAT...LON 4086 9668 4101 9671 4105 9648 4088 9647
TIME...MOT...LOC 0457Z 247DEG 46KT 4094 9666 

$$

MAYES

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 14, 7:02 PM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	58 min
Apr 14, 9:17 PM CDT	Wind Advisory	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	31 hr
Apr 14, 9:25 PM CDT	Special Weather Statement	OAX	Platte	35 min
Apr 14, 9:49 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce, Wayne	26 min
Apr 14, 10:51 PM CDT	Special Weather Statement	OAX	Cedar, Pierce	24 min
Apr 14, 11:01 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	29 min
Apr 14, 11:26 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Seward	34 min
Apr 14, 11:52 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Sarpy, Saunders	38 min
Apr 15, 12:09 AM CDT	Special Weather Statement	OAX	Nemaha, Richardson	36 min
Apr 15, 12:12 AM CDT	Special Weather Statement	OAX	Douglas	33 min
Apr 15, 12:28 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy	21 min
Apr 15, 12:41 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	34 min
Apr 15, 2:05 AM CDT	Special Weather Statement	OAX	Johnson, Nemaha, Otoe, Pawnee, Richardson	85 min
Apr 15, 10:23 AM CDT	River Flood Warning	OAX	Nemaha	11 hr
Apr 15, 10:23 AM CDT	River Flood Warning	OAX	Richardson	21 hr
Apr 15, 1:53 PM CDT	Special Weather Statement	OAX	Knox	67 min
Apr 15, 2:06 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	54 min
Apr 15, 2:11 PM CDT	Tornado Warning	OAX	Knox	49 min
Apr 15, 2:30 PM CDT	Tornado Warning	OAX	Knox	39 min

Nearby

Tornado Warnings in Nebraska, 2012 Every tornado warning in 2012 Tornadoes in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.