Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 25, NWS Cheyenne, WY

July 4, 2011Banner County, Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 4, 2011, 5:37 PM MDT for Banner County, Scotts Bluff County, Nebraska. It was in force for 26 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: Jul 4, 2011, 5:37 PM MDT (23:37 UTC)
Expired: Jul 4, 2011, 6:03 PM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

Counties Banner County, NE, Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 129 km from the middle of the area, began a volume at 23:37 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

Denver, CO (KDNR), launched 12:00Z, 11.6 hours before the alert went out and 218 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: 3650 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 55 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.

496 
WFUS55 KCYS 042337
TORCYS
NEC007-157-050015-
/O.NEW.KCYS.TO.W.0025.110704T2337Z-110705T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
537 PM MDT MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 615 PM MDT

* AT 533 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD   
  5 MILES WEST OF SCOTTSBLUFF. A TORNADO MAY DEVELOP AT ANY TIME.    
  DOPPLER RADAR SHOWED THIS DANGEROUS STORM MOVING SOUTHEAST AT 30   
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  SCOTTSBLUFF...SCOTTS BLUFF NATIONAL MONUMENT...TERRYTOWN...
  GERING...SCOTTSBLUFF AIRPORT...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 4174 10337 4173 10337 4160 10349 4185 10389
      4200 10375 4200 10372 4186 10336
TIME...MOT...LOC 2336Z 304DEG 28KT 4189 10375

$$

MAZUR

1 follow-up statement

648 
WWUS55 KCYS 050003
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
603 PM MDT MON JUL 4 2011

NEC007-157-050013-
/O.CAN.KCYS.TO.W.0025.000000T0000Z-110705T0015Z/
BANNER NE-SCOTTS BLUFF NE-
603 PM MDT MON JUL 4 2011

...THE TORNADO WARNING FOR SCOTTS BLUFF AND NORTHEASTERN BANNER
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4174 10337 4173 10337 4160 10349 4185 10389
      4200 10375 4200 10372 4186 10336
TIME...MOT...LOC 0003Z 304DEG 28KT 4177 10352

$$

MAZUR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 4:27 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	29 min
Jul 4, 4:35 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	12 min
Jul 4, 4:45 PM MDT	Tornado Warning	CYS	Sioux	27 min
Jul 4, 5:08 PM MDT	Tornado Warning	CYS	Scotts Bluff, Sioux	37 min
Jul 4, 5:41 PM MDT	Flash Flood Warning	CYS	Scotts Bluff, Sioux	2 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.