Alert archive / Nebraska / Tornado Warnings in 2012

Tornado Warning 25, NWS North Platte, NE

August 2, 2012Deuel County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 2, 2012, 6:00 PM MDT for Deuel County, Nebraska. It was in force for 30 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 2, 2012, 6:00 PM MDT (00:00 UTC)
Expired
Aug 2, 2012, 6:30 PM MDT
In force
30 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon

County Deuel County, NE

The radar

The North Platte radar (KLNX), 162 km from the middle of the area, began a volume at 00:00 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

TimeReportWhereRemark
Aug 2, 6:36 PM MDTTORNADO4 S Big Springs, NETORNADO ON GROUND APPROXIMATELY 4 MILES SOUTH OF BIG SPRINGS MOVING EAST.

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 00:00Z, 0.0 hours before the alert went out and 130 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2012-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1601 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2012-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1601 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
2010 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

973 
WFUS53 KLBF 030000
TORLBF
NEC049-030030-
/O.NEW.KLBF.TO.W.0025.120803T0000Z-120803T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
600 PM MDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN DEUEL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 630 PM MDT

* AT 555 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A CONFIRMED TORNADO NEAR GOLDENEYE STATE WILDLIFE MANAGEMENT
  AREA...OR 5 MILES NORTHEAST OF JULESBURG. DOPPLER RADAR SHOWED THIS
  TORNADO MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BIG SPRINGS AND GOLDENEYE STATE WILDLIFE MANAGEMENT AREA.

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 4120 10214 4114 10205 4100 10205 4099 10210
      4100 10219 4113 10236
TIME...MOT...LOC 0000Z 314DEG 22KT 4102 10216

$$

SPRINGER
1 follow-up statement
851 
WWUS53 KLBF 030014
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
714 PM CDT THU AUG 2 2012

NEC049-030030-
/O.CON.KLBF.TO.W.0025.000000T0000Z-120803T0030Z/
DEUEL NE-
614 PM MDT THU AUG 2 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN DEUEL COUNTY UNTIL
630 PM MDT...

AT 609 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR GOLDENEYE STATE WILDLIFE MANAGEMENT AREA...OR
6 MILES SOUTH OF BIG SPRINGS...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...

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 4120 10214 4114 10205 4100 10205 4099 10210
      4100 10219 4113 10236
TIME...MOT...LOC 0014Z 314DEG 22KT 4096 10208

$$

SPRINGER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 6:27 PM MDTSevere Thunderstorm WarningLBFDeuel, Keith, Perkins30 min
Aug 2, 6:40 PM MDTTornado WarningLBFDeuel, Perkins25 min
Aug 2, 6:55 PM MDTSevere Thunderstorm WarningLBFPerkins49 min
Aug 2, 7:04 PM MDTTornado WarningLBFPerkins26 min
Aug 2, 7:30 PM MDTSevere Thunderstorm WarningLBFChase, Perkins45 min
Aug 3, 12:19 AM MDTSevere Thunderstorm WarningLBFBoyd, Brown, Holt, Keya Paha, Rock56 min
Aug 3, 4:53 PM MDTSevere Thunderstorm WarningLBFBoyd, Keya Paha67 min
Aug 3, 5:40 PM MDTSevere Thunderstorm WarningLBFBrown, Rock65 min

Nearby

Tornado Warnings in Nebraska, 2012Every tornado warning in 2012Tornadoes in 2012

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.