Alert archive / Nebraska / Tornado Warnings in 2013

Tornado Warning 29, NWS Cheyenne, WY

August 6, 2013Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Aug 6, 2013, 6:32 PM MDT for Scotts Bluff County, Nebraska. It was in force for 28 min. 6 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 6, 2013, 6:32 PM MDT (00:32 UTC)
Expired: Aug 6, 2013, 7:00 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 134 km from the middle of the area, began a volume at 00:32 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 6, 6:38 PM MDT	HAIL 0.5	3 Ne Scottsbluff, NE	TWO MILES NORTH OF WESTERN NEBRASKA REGIONAL AIRPORT.
Aug 6, 6:41 PM MDT	TSTM WND GST 59	3 E Scottsbluff, NE	OBSERVED AT WESTERN NEBRASKA REGIONAL AIRPORT.
Aug 6, 6:44 PM MDT	TSTM WND GST 71	3 E Scottsbluff, NE	OBSERVED AT WESTERN NEBRASKA REGIONAL AIRPORT.
Aug 6, 6:45 PM MDT	HAIL 1.75	2 Ne Scottsbluff, NE	RANGED FROM ONE HALF INCH TO GOLFBALL SIZE
Aug 6, 6:50 PM MDT	HAIL 0.75	3 Nw Minatare, NE	PEA TO PENNY SIZE HAIL FELL BETWEEN 640 AND 700 PM. HAIL ACCUMULATIONS WERE ROUGHLY KNEE DEEP
Aug 6, 7:00 PM MDT	TSTM WND DMG	N Mcgrew, NE	TREES DOWN ACROSS COUNTY ROAD 34

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

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.5 hours before the alert went out and 219 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3159 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: -2 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.

288 
WFUS55 KCYS 070032
TORCYS
NEC157-070100-
/O.NEW.KCYS.TO.W.0029.130807T0032Z-130807T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
632 PM MDT TUE AUG 6 2013

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 700 PM MDT

* AT 627 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR WESTERN NEBRASKA REGIONAL AIRPORT...AND
  MOVING SOUTHEAST AT 20 MPH.

  HAZARD...TORNADO.

  SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  MINATARE...MELBETA AND MCGREW.

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 4171 10345 4190 10366 4198 10359 4189 10336
      4179 10336
TIME...MOT...LOC 0032Z 306DEG 16KT 4186 10353

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MAZUR

1 follow-up statement

450 
WWUS55 KCYS 070049
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
649 PM MDT TUE AUG 6 2013

NEC157-070100-
/O.CON.KCYS.TO.W.0029.000000T0000Z-130807T0100Z/
SCOTTS BLUFF NE-
649 PM MDT TUE AUG 6 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN SCOTTS BLUFF
COUNTY UNTIL 700 PM MDT...

AT 644 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR MINATARE...AND MOVING SOUTHEAST AT 30 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

LOCATIONS IMPACTED INCLUDE...
MCGREW.

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 4171 10345 4188 10364 4196 10356 4189 10337
      4187 10336 4179 10336
TIME...MOT...LOC 0049Z 309DEG 25KT 4179 10341

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$
MAZUR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:00 PM MDT	Special Weather Statement	CYS	Kimball	45 min
Aug 6, 6:20 PM MDT	Special Weather Statement	CYS	Scotts Bluff	25 min
Aug 6, 6:45 PM MDT	Special Weather Statement	CYS	Box Butte	60 min
Aug 6, 6:59 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Morrill, Scotts Bluff	46 min
Aug 6, 7:02 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Sioux	43 min
Aug 6, 7:38 PM MDT	Special Weather Statement	CYS	Morrill	67 min
Aug 6, 7:48 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	27 min
Aug 6, 8:06 PM MDT	Special Weather Statement	CYS	Box Butte	54 min
Aug 6, 8:20 PM MDT	Special Weather Statement	CYS	Box Butte	25 min
Aug 6, 8:40 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	50 min
Aug 6, 9:07 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	23 min
Aug 6, 9:18 PM MDT	Areal Flood Advisory	CYS	Cheyenne	4 hr

Nearby

Tornado Warnings in Nebraska, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.