Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 39, NWS North Platte, NE

August 9, 2011Keith County, Lincoln County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 9, 2011, 1:32 PM MDT for Keith County, Lincoln County, Nebraska. It was in force for 28 min. 6 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: Aug 9, 2011, 1:32 PM MDT (19:32 UTC)
Expired: Aug 9, 2011, 2:00 PM MDT
In force: 28 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

Counties Keith County, NE, Lincoln County, NE

The radar

The North Platte radar (KLNX), 115 km from the middle of the area, began a volume at 19:32 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
Aug 9, 1:36 PM MDT	HAIL 2.5	4 N Paxton, NE	PUBLIC REPORTED TENNIS BALL SIZED HAIL 4 MILES NORTH OF PAXTON.
Aug 9, 1:38 PM MDT	FUNNEL CLOUD	10 W Sutherland, NE	TRAINED SPOTTER REPORTED A WALL CLOUD PRODUCING BRIEF FUNNELS APPROXIMATELY 10 MILES WEST OF SUTHERLAND. SPOTTER WAS LOCATED 4 MILES WEST OF SUTHERLAND.
Aug 9, 1:40 PM MDT	HAIL 1.5	Paxton, NE
Aug 9, 1:44 PM MDT	HAIL 1.75	Sarben, NE	NERAIN OBSERVER REPORTED GOLF BALL SIZED HAIL AND BROKEN WINDOWS IN SUTHERLAND.
Aug 9, 1:55 PM MDT	HAIL 1.75	Sutherland, NE	LAW ENFORCEMENT DISPATCH REPORTED GOLF BALL SIZED HAIL COVERING THE GROUND NEAR SUTHERLAND POWER PLANT.
Aug 9, 1:57 PM MDT	HAIL 1.75	Sutherland, NE	PUBLIC REPORTED GOLF BALL SIZED HAIL IN SUTHERLAND.

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.5 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: 98 J/kg
Mixed-layer CIN: -357 J/kg
Mixed-layer LCL: 1507 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

278 
WFUS53 KLBF 091932
TORLBF
NEC101-111-092000-
/O.NEW.KLBF.TO.W.0039.110809T1932Z-110809T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
232 PM CDT TUE AUG 9 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN KEITH COUNTY IN SOUTHWEST NEBRASKA...
  WEST CENTRAL LINCOLN COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 300 PM CDT/200 PM MDT/

* AT 127 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES NORTHWEST OF PAXTON...OR 17 MILES EAST OF
  OGALLALA...AND MOVING SOUTHEAST AT 45 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  SUTHERLAND RESERVOIR STATE RECREATION AREA AROUND 245 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE INTERSTATE
80 MILE MARKER 150 AND HIGHWAY 25 MILE MARKER 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4097 10125 4100 10125 4100 10130 4121 10158
      4135 10137 4105 10085 4090 10117
TIME...MOT...LOC 1931Z 312DEG 39KT 4117 10136

$$

STOPPKOTTE

1 follow-up statement

282 
WWUS53 KLBF 091942
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
242 PM CDT TUE AUG 9 2011

NEC101-111-092000-
/O.CON.KLBF.TO.W.0039.000000T0000Z-110809T2000Z/
KEITH NE-LINCOLN NE-
242 PM CDT TUE AUG 9 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL LINCOLN AND
SOUTHEASTERN KEITH COUNTIES UNTIL 300 PM CDT/200 PM MDT/...

AT 136 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR PAXTON...OR 20 MILES EAST OF OGALLALA...MOVING
SOUTHEAST AT 40 MPH.

THIS DANGEROUS STORM WILL AFFECT THE INTERSTATE 80 CORRIDOR NEAR 
PAXTON TO SUTHERLAND...AND RURAL AREAS OF SOUTHEASTERN KEITH AND 
WEST CENTRAL LINCOLN COUNTIES...INCLUDING THE FOLLOWING LOCATIONS 
HIGHWAY 25 MILE MARKER 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4097 10125 4100 10125 4100 10130 4121 10158
      4135 10137 4105 10085 4090 10117
TIME...MOT...LOC 1941Z 323DEG 34KT 4110 10129

$$

STOPPKOTTE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 12:44 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	46 min
Aug 9, 1:14 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln	46 min
Aug 9, 2:01 PM MDT	Severe Thunderstorm Warning	LBF	Hayes, Lincoln, Perkins	44 min
Aug 9, 2:14 PM MDT	Tornado Warning	LBF	Hayes, Lincoln	31 min
Aug 9, 2:43 PM MDT	Severe Thunderstorm Warning	LBF	Deuel	47 min
Aug 9, 2:44 PM MDT	Tornado Warning	LBF	Frontier, Hayes	31 min
Aug 9, 3:16 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	29 min
Aug 9, 3:30 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	45 min
Aug 9, 3:56 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	49 min
Aug 9, 4:36 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	28 min
Aug 9, 4:50 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	55 min
Aug 9, 5:24 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Perkins	51 min

Nearby

Tornado Warnings in Nebraska, 2011 Every tornado warning in 2011 Tornadoes 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; radar from the NEXRAD Level II archive.