Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 51, NWS North Platte, NE

August 17, 2011Cherry County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 17, 2011, 4:51 PM MDT for Cherry County, Nebraska. It was in force for 39 min. 2 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 17, 2011, 4:51 PM MDT (22:51 UTC)
Expired: Aug 17, 2011, 5:30 PM MDT
In force: 39 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Cherry County, NE

The radar

The North Platte radar (KLNX), 86 km from the middle of the area, began a volume at 22:54 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 17, 5:00 PM MDT	HAIL 2.5	36 Nnw Mullen, NE
Aug 17, 5:21 PM MDT	HAIL 1.25	36 Nw Mullen, 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
Aug 17, 2:37 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.9 hours before the alert went out and 162 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: 434 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 101 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.

517 
WFUS53 KLBF 172251
TORLBF
NEC031-172330-
/O.NEW.KLBF.TO.W.0051.110817T2251Z-110817T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
451 PM MDT WED AUG 17 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CHERRY COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 530 PM MDT

* AT 449 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 7 MILES NORTH OF ROUND LAKE...OR 39 MILES
  SOUTHEAST OF GORDON...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROUND LAKE AND SPECKEL MEIR LAKE.

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.

&&

LAT...LON 4248 10108 4225 10140 4253 10169 4264 10151
TIME...MOT...LOC 2251Z 319DEG 19KT 4252 10152

$$

SPRINGER

2 follow-up statements

458 
WWUS53 KLBF 172314
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
514 PM MDT WED AUG 17 2011

NEC031-172330-
/O.CON.KLBF.TO.W.0051.000000T0000Z-110817T2330Z/
CHERRY NE-
514 PM MDT WED AUG 17 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL CHERRY COUNTY
UNTIL 530 PM MDT...

AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 7 MILES EAST OF ROUND LAKE...OR 35 MILES NORTHWEST
OF MULLEN...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  SPECKEL MEIR LAKE.

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.

&&

LAT...LON 4248 10108 4225 10140 4253 10169 4264 10151
TIME...MOT...LOC 2314Z 313DEG 16KT 4245 10142

$$

SPRINGER

332 
WWUS53 KLBF 172329
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
529 PM MDT WED AUG 17 2011

NEC031-172338-
/O.EXP.KLBF.TO.W.0051.000000T0000Z-110817T2330Z/
CHERRY NE-
529 PM MDT WED AUG 17 2011

...THE TORNADO WARNING FOR CENTRAL CHERRY COUNTY WILL EXPIRE AT 530
PM MDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
CENTRAL CHERRY COUNTY UNTIL 615 PM MDT.

LAT...LON 4248 10108 4225 10140 4253 10169 4264 10151
TIME...MOT...LOC 2328Z 313DEG 16KT 4241 10136

$$

SPRINGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 4:14 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	61 min
Aug 17, 5:18 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	57 min
Aug 17, 5:40 PM MDT	Tornado Warning	LBF	Cherry	35 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.