Alert archive / Nebraska / Tornado Warnings in 2011
Tornado Warning 22, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jun 20, 2011, 7:29 PM CDT for Madison County, Platte County, Nebraska. It was in force for 31 min. 4 reports 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
- Jun 20, 2011, 7:29 PM CDT (00:29 UTC)
- Expired
- Jun 20, 2011, 8:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
Counties Madison County, NE, Platte County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 20, 7:30 PM CDT | TSTM WND DMG | Norfolk, NE | MANY TREES AND SOME POWER LINES DOWN. |
| Jun 20, 7:30 PM CDT | HAIL 1.75 | Humphrey, NE | RELAYED BY BROADCAST MEDIA. |
| Jun 20, 7:38 PM CDT | TSTM WND GST 63 | Norfolk, NE | OBSERVATION AT NORFOLK AIRPORT. |
| Jun 20, 7:38 PM CDT | HAIL 1.75 | 4 S Madison, 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 |
|---|---|---|---|
| Jun 20, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 20, 6:53 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.5 hours before the alert went out and 117 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
- 4194 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 4.6
- Supercell composite
- 17.5
The text
As transmitted, in the capitals the NWS used until 2016.
358
WFUS53 KOAX 210029
TOROAX
NEC119-141-210100-
/O.NEW.KOAX.TO.W.0022.110621T0029Z-110621T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
729 PM CDT MON JUN 20 2011
THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A
* TORNADO WARNING FOR...
EASTERN MADISON COUNTY IN NORTHEAST NEBRASKA...
NORTH CENTRAL PLATTE COUNTY IN NORTHEAST NEBRASKA...
* UNTIL 800 PM CDT
* AT 727 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 8 MILES WEST OF CRESTON...OR 20 MILES NORTHWEST
OF COLUMBUS...AND MOVING NORTH AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...
NORFOLK...MADISON AND BATTLE CREEK.
THE WARNED AREA INCLUDES HIGHWAY 81 IN NEBRASKA BETWEEN MILE MARKERS
133 AND 155.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR
ROOM ON THE LOWEST FLOOR!
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN OMAHA.
&&
LAT...LON 4202 9767 4209 9750 4205 9738 4165 9746
4166 9753 4176 9765
TIME...MOT...LOC 0030Z 194DEG 26KT 4172 9750
$$
NIETFELD/BCM2 follow-up statements
943
WWUS53 KOAX 210040
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
740 PM CDT MON JUN 20 2011
NEC141-210050-
/O.CAN.KOAX.TO.W.0022.000000T0000Z-110621T0100Z/
PLATTE NE-
740 PM CDT MON JUN 20 2011
...THE TORNADO WARNING FOR NORTH CENTRAL PLATTE COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN OMAHA.
LAT...LON 4204 9754 4209 9750 4205 9738 4174 9744
4174 9752 4183 9754
TIME...MOT...LOC 0040Z 195DEG 32KT 4180 9745
$$
NEC119-210100-
/O.CON.KOAX.TO.W.0022.000000T0000Z-110621T0100Z/
MADISON NE-
740 PM CDT MON JUN 20 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN MADISON COUNTY
UNTIL 800 PM CDT...
AT 737 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
DANGEROUS STORM WAS LOCATED NEAR MADISON...OR 18 MILES SOUTH OF
NORFOLK...MOVING NORTH AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
NORFOLK AND MADISON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN OMAHA.
&&
LAT...LON 4204 9754 4209 9750 4205 9738 4174 9744
4174 9752 4183 9754
TIME...MOT...LOC 0040Z 195DEG 32KT 4180 9745
$$
NIETFELD/BCM254
WWUS53 KOAX 210055
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
755 PM CDT MON JUN 20 2011
NEC119-210105-
/O.EXP.KOAX.TO.W.0022.000000T0000Z-110621T0100Z/
MADISON NE-
755 PM CDT MON JUN 20 2011
...THE TORNADO WARNING FOR EASTERN MADISON COUNTY WILL EXPIRE AT 800
PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO
WATCH REMAINS IN EFFECT.
LAT...LON 4204 9754 4209 9750 4205 9738 4174 9744
4174 9752 4183 9754
TIME...MOT...LOC 0055Z 195DEG 32KT 4193 9740
$$
NIETFELD/BCMThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:12 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Gage, Johnson, Lancaster, Otoe, Pawnee and 1 more | 48 min |
| Jun 20, 7:13 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox | 32 min |
| Jun 20, 7:27 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Knox, Madison, Pierce, Wayne | 48 min |
| Jun 20, 7:39 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Dodge, Douglas, Otoe, Sarpy, Saunders and 1 more | 51 min |
| Jun 20, 7:48 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Johnson, Nemaha, Otoe, Pawnee, Richardson | 42 min |
| Jun 20, 7:50 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Knox, Wayne | 40 min |
| Jun 20, 8:01 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Cuming, Dodge, Saunders, Thurston, Washington | 44 min |
| Jun 20, 8:08 PM CDT | Areal Flood Advisory | OAX | Gage, Pawnee | 2 hr |
| Jun 20, 8:11 PM CDT | Flash Flood Warning | OAX | Dodge, Saunders | 5 hr |
| Jun 20, 8:16 PM CDT | Flash Flood Warning | OAX | Madison, Platte, Stanton | 3 hr |
| Jun 20, 8:16 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge, Douglas, Washington | 44 min |
| Jun 20, 8:27 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Thurston, Wayne | 33 min |
| Jun 20, 8:34 PM CDT | Flash Flood Warning | OAX | Dodge, Douglas, Washington | 2 hr |
| Jun 20, 8:37 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Cuming, Thurston, Washington | 38 min |
| Jun 20, 8:38 PM CDT | Areal Flood Advisory | OAX | Antelope, Knox, Pierce | 6 hr |
| Jun 20, 8:43 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Nemaha, Otoe, Sarpy | 62 min |
| Jun 20, 8:46 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Richardson | 29 min |
| Jun 20, 8:49 PM CDT | Areal Flood Advisory | OAX | Cedar, Pierce, Wayne | 6 hr |
| Jun 20, 9:12 PM CDT | Flash Flood Warning | OAX | Burt, Cuming, Thurston | 2 hr |
Nearby
Tornado Warnings in Nebraska, 2011Every tornado warning in 2011Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.