Alert archive / Nebraska / Tornado Warnings in 2014

Tornado Warning 3, NWS Cheyenne, WY

May 18, 2014Box Butte County, Sioux County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 18, 2014, 6:35 PM MDT for Box Butte County, Sioux County, Nebraska. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 18, 2014, 6:35 PM MDT (00:35 UTC)
Expired: May 18, 2014, 7:15 PM MDT
In force: 40 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Box Butte County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 157 km from the middle of the area, began a volume at 00:39 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.

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 0.6 hours before the alert went out and 227 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: 197 J/kg
Mixed-layer CIN: -316 J/kg
Mixed-layer LCL: 2188 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

590 
WFUS55 KCYS 190035
TORCYS
NEC013-165-190115-
/O.NEW.KCYS.TO.W.0003.140519T0035Z-140519T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
635 PM MDT SUN MAY 18 2014

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN BOX BUTTE COUNTY IN THE PANHANDLE OF NEBRASKA...
  SOUTHEASTERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 715 PM MDT

* AT 629 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES NORTH OF LAKE MINATARE...AND MOVING
  NORTHEAST AT 20 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL.

  SOURCE...WEATHER SPOTTERS REPORTED TORNADO ON THE GROUND.

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
           TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
           LIKELY.

* THIS DANGEROUS STORM WILL BE NEAR...
  KILPATRICK LAKE AROUND 700 PM MDT.

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.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.

&&

LAT...LON 4201 10318 4200 10331 4200 10352 4207 10355
      4223 10336
TIME...MOT...LOC 0035Z 241DEG 18KT 4205 10345

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

RUBIN

3 follow-up statements

640 
WWUS55 KCYS 190051
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
651 PM MDT SUN MAY 18 2014

NEC165-190100-
/O.CAN.KCYS.TO.W.0003.000000T0000Z-140519T0115Z/
SIOUX NE-
651 PM MDT SUN MAY 18 2014

...THE TORNADO WARNING FOR SOUTHEASTERN SIOUX COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4201 10318 4200 10331 4202 10339 4205 10341
      4209 10340 4209 10344 4210 10344 4223 10336
TIME...MOT...LOC 0050Z 241DEG 18KT 4206 10332

$$

NEC013-190115-
/O.CON.KCYS.TO.W.0003.000000T0000Z-140519T0115Z/
BOX BUTTE NE-
651 PM MDT SUN MAY 18 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN BOX BUTTE
COUNTY UNTIL 715 PM MDT...

AT 648 PM MDT...A CONFIRMED TORNADO WAS LOCATED NEAR KILPATRICK
LAKE...AND MOVING NORTHEAST AT 20 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL.

SOURCE...WEATHER SPOTTERS CONFIRMED MULTIPLE TORNADO SIGHTINGS.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

THIS TORNADIC STORM WILL BE NEAR...
  KILPATRICK LAKE AROUND 655 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.

&&

LAT...LON 4201 10318 4200 10331 4202 10339 4205 10341
      4209 10340 4209 10344 4210 10344 4223 10336
TIME...MOT...LOC 0050Z 241DEG 18KT 4206 10332

TORNADO...OBSERVED
HAIL...1.00IN

$$

RUBIN

518 
WWUS55 KCYS 190103
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
703 PM MDT SUN MAY 18 2014

NEC013-190115-
/O.CON.KCYS.TO.W.0003.000000T0000Z-140519T0115Z/
BOX BUTTE NE-
703 PM MDT SUN MAY 18 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL BOX BUTTE
COUNTY UNTIL 715 PM MDT...

AT 659 PM MDT...A CONFIRMED TORNADO AND WALL CLOUD WERE LOCATED NEAR 
KILPATRICK LAKE...AND MOVING NORTHEAST AT 20 MPH.

HAZARD...DAMAGING TORNADO.

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF WEST CENTRAL
BOX BUTTE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...PARK YOUR VEHICLE AND STAY PUT.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.

&&

LAT...LON 4204 10329 4206 10333 4212 10338 4223 10336
      4205 10322
TIME...MOT...LOC 0103Z 241DEG 18KT 4209 10324

TORNADO...OBSERVED
HAIL...<.75IN

$$

RUBIN

980 
WWUS55 KCYS 190111
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
711 PM MDT SUN MAY 18 2014

NEC013-190120-
/O.EXP.KCYS.TO.W.0003.000000T0000Z-140519T0115Z/
BOX BUTTE NE-
711 PM MDT SUN MAY 18 2014

...THE TORNADO WARNING FOR WEST CENTRAL BOX BUTTE COUNTY IS BEING
REISSUED...

PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER
INFORMATION.

A NEW TORNADO WARNING...NUMBER 4...IS IN EFFECT FOR SOUTHERN BOX 
BUTTE COUNTY UNTIL 800 PM MDT.

LAT...LON 4204 10329 4206 10333 4212 10338 4223 10336
      4205 10322
TIME...MOT...LOC 0110Z 241DEG 18KT 4211 10320

$$

RUBIN

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 6:38 PM MDT	Special Weather Statement	CYS	Kimball	67 min
May 18, 6:44 PM MDT	Special Weather Statement	CYS	Morrill	46 min
May 18, 6:54 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball, Morrill	66 min
May 18, 7:08 PM MDT	Tornado Warning	CYS	Box Butte	52 min
May 18, 7:40 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	35 min
May 18, 10:01 PM MDT	Special Weather Statement	CYS	Box Butte	44 min
May 19, 3:16 PM MDT	Special Weather Statement	CYS	Sioux	44 min
May 19, 5:16 PM MDT	Special Weather Statement	CYS	Scotts Bluff	44 min
May 19, 5:51 PM MDT	Special Weather Statement	CYS	Banner	39 min

Nearby

Tornado Warnings in Nebraska, 2014 Every tornado warning in 2014 Tornadoes in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.