Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 40, NWS North Platte, NE

August 9, 2011Hayes County, Lincoln County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 9, 2011, 3:14 PM CDT for Hayes County, Lincoln County, Nebraska. It was in force for 31 min. 3 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, 3:14 PM CDT (20:14 UTC)
Expired: Aug 9, 2011, 3:45 PM CDT
In force: 31 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

Counties Hayes County, NE, Lincoln County, NE

The radar

The North Platte radar (KLNX), 142 km from the middle of the area, began a volume at 20:18 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, 3:32 PM CDT	HAIL 2.75	Wallace, NE	LAW ENFORCEMENT REPORTED BASEBALL SIZED HAIL IN WALLACE.
Aug 9, 3:35 PM CDT	HAIL 2.75	10 Nne Hayes Center, NE	PUBLIC REPORTED BASEBALL SIZED HAIL 10 MILES NORTH NORTHEAST OF HAYES CENTER.
Aug 9, 3:39 PM CDT	HAIL 1.75	7 N Hayes Center, NE	SPOTTER REPORTED GOLF BALL SIZED HAIL 7 MILES NORTH OF HAYES CENTER.

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
Aug 9, 2:51 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.2 hours before the alert went out and 59 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.

286 
WFUS53 KLBF 092014
TORLBF
NEC085-111-092045-
/O.NEW.KLBF.TO.W.0040.110809T2014Z-110809T2045Z/

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

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN HAYES COUNTY IN SOUTHWEST NEBRASKA...
  SOUTHWESTERN LINCOLN COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 345 PM CDT

* AT 308 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR WALLACE...OR 24 MILES NORTH OF HAYES
  CENTER...AND MOVING SOUTHEAST AT 40 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  HAYES CENTER STATE WILDLIFE MANAGEMENT AREA AROUND 335 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE HIGHWAY 25
MILE MARKER 50.

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 4080 10125 4086 10125 4092 10112 4068 10078
      4066 10079 4047 10110
TIME...MOT...LOC 2014Z 317DEG 41KT 4079 10111

$$

STOPPKOTTE

1 follow-up statement

567 
WWUS53 KLBF 092023
SVSLBF

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

NEC085-111-092045-
/O.CON.KLBF.TO.W.0040.000000T0000Z-110809T2045Z/
HAYES NE-LINCOLN NE-
323 PM CDT TUE AUG 9 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN LINCOLN AND
NORTHEASTERN HAYES COUNTIES UNTIL 345 PM CDT...

AT 318 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES SOUTHEAST OF WALLACE...OR 19 MILES NORTH OF
HAYES CENTER...MOVING SOUTHEAST AT 40 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  HAYES CENTER STATE WILDLIFE MANAGEMENT AREA AROUND 345 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4080 10125 4086 10125 4092 10112 4068 10078
      4066 10079 4047 10110
TIME...MOT...LOC 2023Z 320DEG 33KT 4074 10106

$$

STOPPKOTTE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 1:44 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	46 min
Aug 9, 2:14 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln	46 min
Aug 9, 2:32 PM CDT	Tornado Warning	LBF	Keith, Lincoln	28 min
Aug 9, 3:01 PM CDT	Severe Thunderstorm Warning	LBF	Hayes, Lincoln, Perkins	44 min
Aug 9, 3:43 PM CDT	Severe Thunderstorm Warning	LBF	Deuel	47 min
Aug 9, 3:44 PM CDT	Tornado Warning	LBF	Frontier, Hayes	31 min
Aug 9, 4:16 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	29 min
Aug 9, 4:30 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	45 min
Aug 9, 4:56 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	49 min
Aug 9, 5:36 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	28 min
Aug 9, 5:50 PM CDT	Severe Thunderstorm Warning	LBF	Perkins	55 min
Aug 9, 6:24 PM CDT	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.