Alert archive / Nebraska / Tornado Warnings in 2014

Tornado Warning 15, NWS Cheyenne, WY

July 22, 2014Dawes County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 22, 2014, 9:24 PM MDT for Dawes County, Nebraska. It was in force for 36 min. 5 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: Jul 22, 2014, 9:24 PM MDT (03:24 UTC)
Expired: Jul 22, 2014, 10:00 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

County Dawes County, NE

The radar

The Rapid City radar (KUDX), 150 km from the middle of the area, began a volume at 03:24 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
Jul 22, 9:25 PM MDT	HAIL 1.5	7 W Chadron, NE	SPOTTER SAID SOME WERE LARGER BUT AVERAGE WAS PINGPONG.
Jul 22, 9:29 PM MDT	TSTM WND GST 74	Chadron, NE
Jul 22, 9:34 PM MDT	HAIL 1	Chadron, NE
Jul 22, 9:34 PM MDT	HAIL 1.75	1 S Chadron, NE	ALSO SOME FELL 1W OF CHADRON SAME SIZE.
Jul 22, 9:48 PM MDT	HAIL 0.5	12 S Chadron, NE	PEA TO MARBLE SIZE. WALL CLOUD OBSERVED.

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

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 3.4 hours before the alert went out and 143 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: 939 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1873 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

965 
WFUS55 KCYS 230324
TORCYS
NEC045-230400-
/O.NEW.KCYS.TO.W.0015.140723T0324Z-140723T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
924 PM MDT TUE JUL 22 2014

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DAWES COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 1000 PM MDT

* AT 921 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR CHADRON...AND MOVING SOUTHEAST AT 30 MPH.

  HAZARD...TORNADO AND TENNIS BALL SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  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 AFFECT MAINLY RURAL AREAS OF NORTHEASTERN
  DAWES COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.

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 4282 10325 4298 10312 4291 10278 4280 10278
      4278 10277 4270 10276 4244 10277
TIME...MOT...LOC 0324Z 311DEG 28KT 4276 10296

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

HAMMER

1 follow-up statement

606 
WWUS55 KCYS 230340
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
940 PM MDT TUE JUL 22 2014

NEC045-230400-
/O.CON.KCYS.TO.W.0015.000000T0000Z-140723T0400Z/
DAWES NE-
940 PM MDT TUE JUL 22 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN DAWES COUNTY UNTIL
1000 PM MDT...

AT 937 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR RED CLOUD CAMPGROUND...AND MOVING SOUTHEAST AT 30
MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION. GOLF BALL SIZED HAIL WAS REPORTED 
1 MILE SOUTH OF CHADRON AS WELL. 

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.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN DAWES 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 4273 10313 4298 10312 4291 10278 4280 10278
      4278 10277 4270 10276 4244 10277
TIME...MOT...LOC 0340Z 311DEG 28KT 4269 10293

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

HAMMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 6:56 PM MDT	Special Weather Statement	CYS	Scotts Bluff	49 min
Jul 22, 8:47 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	58 min
Jul 22, 9:55 PM MDT	Tornado Warning	CYS	Box Butte, Dawes	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.