Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 57, NWS North Platte, NE

August 18, 2011Holt County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 18, 2011, 5:19 PM CDT for Holt County, Nebraska. It was in force for 26 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: Aug 18, 2011, 5:19 PM CDT (22:19 UTC)
Expired: Aug 18, 2011, 5:45 PM CDT
In force: 26 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Holt County, NE

The radar

The North Platte radar (KLNX), 188 km from the middle of the area, began a volume at 22:22 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 18, 5:23 PM CDT	TORNADO	1 N Ewing, NE	FUNNEL CLOUD BRIEFLY TOUCHED DOWN AND THEN WENT RIGHT BACK UP. THE STORM WAS EXHIBITING MASSIVE ROTATION OVER EWING.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.3 hours before the alert went out and 194 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: 1181 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.7

Open this sounding in Storm Lab

The text

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

924 
WFUS53 KLBF 182219
TORLBF
NEC089-182245-
/O.NEW.KLBF.TO.W.0057.110818T2219Z-110818T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
519 PM CDT THU AUG 18 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL HOLT COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 545 PM CDT

* AT 513 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD
  NEAR EWING...OR 19 MILES SOUTHEAST OF ONEILL. DOPPLER RADAR SHOWED 
  THIS DEVELOPING TORNADO MOVING EAST AT 10 MPH.

  IN ADDITION...AT 515 PM 2 INCH HAIL WAS REPORTED WAS REPORTED 
  NEAR EWING WITH THIS STORM.

* THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL HOLT
  COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4220 9830 4215 9831 4223 9841 4236 9839
      4243 9830
TIME...MOT...LOC 2218Z 291DEG 8KT 4230 9833

$$

CDC

2 follow-up statements

251 
WWUS53 KLBF 182232
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
532 PM CDT THU AUG 18 2011

NEC089-182245-
/O.CON.KLBF.TO.W.0057.000000T0000Z-110818T2245Z/
HOLT NE-
532 PM CDT THU AUG 18 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL HOLT COUNTY
UNTIL 545 PM CDT...

AT 527 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD.  A
TORNADO MAY DEVELOP AT ANY TIME. THIS DANGEROUS STORM WAS LOCATED 
NEAR THE HOLT ANTELOPE COUNTY LINE...OR 21 MILES SOUTHEAST OF 
ONEILL...MOVING EAST AT 10 MPH.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
HOLT COUNTY.

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 4220 9830 4215 9831 4223 9841 4236 9839
      4243 9830
TIME...MOT...LOC 2231Z 291DEG 8KT 4229 9829

$$

CDC

863 
WWUS53 KLBF 182244
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
544 PM CDT THU AUG 18 2011

NEC089-182255-
/O.EXP.KLBF.TO.W.0057.000000T0000Z-110818T2245Z/
HOLT NE-
544 PM CDT THU AUG 18 2011

...THE TORNADO WARNING FOR EAST CENTRAL HOLT COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4220 9830 4215 9831 4223 9841 4236 9839
      4243 9830
TIME...MOT...LOC 2245Z 291DEG 8KT 4228 9825

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 7:07 PM CDT	Tornado Warning	LBF	Cherry, Hooker	38 min
Aug 17, 7:36 PM CDT	Severe Thunderstorm Warning	LBF	Chase	39 min
Aug 17, 7:44 PM CDT	Tornado Warning	LBF	Hooker	46 min
Aug 17, 8:13 PM CDT	Severe Thunderstorm Warning	LBF	Hooker, McPherson	62 min
Aug 17, 9:10 PM CDT	Tornado Warning	LBF	Brown, Cherry, Keya Paha	35 min
Aug 17, 9:44 PM CDT	Tornado Warning	LBF	Brown, Keya Paha, Rock	31 min
Aug 17, 10:09 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Brown, Holt, Keya Paha, Rock	51 min
Aug 18, 4:22 PM CDT	Severe Thunderstorm Warning	LBF	Boyd	53 min
Aug 18, 4:43 PM CDT	Severe Thunderstorm Warning	LBF	Holt	47 min
Aug 18, 4:54 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	66 min
Aug 18, 5:25 PM CDT	Severe Thunderstorm Warning	LBF	Holt	50 min
Aug 18, 5:53 PM CDT	Tornado Warning	LBF	Holt	37 min
Aug 18, 6:39 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	66 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.