Alert archive / Nebraska / Tornado Warnings in 2016

Tornado Warning 15, NWS Cheyenne, WY

July 29, 2016Cheyenne County, Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 29, 2016, 5:09 PM MDT for Cheyenne County, Morrill County, Nebraska. It was in force for 36 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: Jul 29, 2016, 5:09 PM MDT (23:09 UTC)
Expired: Jul 29, 2016, 5:45 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Cheyenne County, NE, Morrill County, NE

The radar

The Cheyenne radar (KCYS), 146 km from the middle of the area, began a volume at 23:12 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 29, 5:46 PM MDT	HAIL 1.25	7 Wsw Dalton, NE

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 29, 3:27 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.2 hours before the alert went out and 178 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: 816 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

368 
WFUS55 KCYS 292309
TORCYS
NEC033-123-292345-
/O.NEW.KCYS.TO.W.0015.160729T2309Z-160729T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
509 PM MDT FRI JUL 29 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL CHEYENNE COUNTY IN THE PANHANDLE OF NEBRASKA...
  SOUTH CENTRAL MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 545 PM MDT
    
* AT 509 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 8 MILES SOUTH OF COURT HOUSE AND JAIL
  ROCKS...OR 25 MILES NORTH OF SIDNEY...MOVING SOUTHEAST AT 15 MPH.

  HAZARD...TORNADO AND HALF DOLLAR 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 BE NEAR...
  DALTON AROUND 540 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4151 10325 4159 10311 4145 10285 4130 10312
TIME...MOT...LOC 2309Z 319DEG 14KT 4148 10314 

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

$$

MAZUR

2 follow-up statements

121 
WWUS55 KCYS 292333
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
533 PM MDT FRI JUL 29 2016

NEC033-123-292345-
/O.CON.KCYS.TO.W.0015.000000T0000Z-160729T2345Z/
CHEYENNE NE-MORRILL NE-
533 PM MDT FRI JUL 29 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR NORTH
CENTRAL CHEYENNE AND SOUTH CENTRAL MORRILL COUNTIES...
    
AT 530 PM MDT...SPOTTERS REPORTED A CONFIRMED TORNADO AROUND 520PM
ABOUT 6 MILES WEST OF DALTON. 17 MILES NORTH OF SIDNEY...MOVING
SOUTHEAST AT 20 MPH. THE TORNADO HAS SINCE LIFTED, BUT THIS RADAR
CONTINUES TO SHOW ROTATION AND IS CAPAPLE OF PRODUCING A TORNADO.

HAZARD...DAMAGING TORNADO AND TWO INCH HAIL. 

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 TORNADO WILL BE NEAR...
  DALTON AROUND 535 PM MDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW! MOVE TO A
BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A MOBILE HOME...OR
IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4148 10319 4154 10309 4141 10292 4130 10312
TIME...MOT...LOC 2330Z 326DEG 15KT 4138 10308 

TORNADO...OBSERVED
HAIL...2.00IN

$$

MAZUR

324 
WWUS55 KCYS 292343
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
543 PM MDT FRI JUL 29 2016

NEC033-123-292353-
/O.EXP.KCYS.TO.W.0015.000000T0000Z-160729T2345Z/
CHEYENNE NE-MORRILL NE-
543 PM MDT FRI JUL 29 2016

...THE TORNADO WARNING FOR NORTH CENTRAL CHEYENNE AND SOUTH CENTRAL
MORRILL COUNTIES WILL EXPIRE AT 545 PM MDT...
    
A NEW TORNADO WARNING HAS BEEN ISSUED FOR NORTHERN CHEYENNE COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
THE PANHANDLE OF NEBRASKA.

LAT...LON 4148 10319 4154 10309 4141 10292 4130 10312
TIME...MOT...LOC 2342Z 319DEG 14KT 4138 10308 

$$

MAZUR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 2:17 PM MDT	Special Weather Statement	CYS	Box Butte	28 min
Jul 29, 2:24 PM MDT	Special Weather Statement	CYS	Sioux	51 min
Jul 29, 2:32 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Scotts Bluff	43 min
Jul 29, 2:42 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	48 min
Jul 29, 3:12 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Scotts Bluff	48 min
Jul 29, 3:13 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	47 min
Jul 29, 3:24 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	51 min
Jul 29, 3:33 PM MDT	Severe Thunderstorm Warning	CYS	Banner	27 min
Jul 29, 3:50 PM MDT	Special Weather Statement	CYS	Dawes	40 min
Jul 29, 3:58 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Scotts Bluff	32 min
Jul 29, 4:22 PM MDT	Special Weather Statement	CYS	Morrill	38 min
Jul 29, 4:28 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	47 min
Jul 29, 4:37 PM MDT	Special Weather Statement	CYS	Scotts Bluff	23 min
Jul 29, 5:08 PM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	37 min
Jul 29, 5:19 PM MDT	Special Weather Statement	CYS	Scotts Bluff	26 min
Jul 29, 5:42 PM MDT	Tornado Warning	CYS	Cheyenne, Morrill	34 min
Jul 29, 5:59 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	46 min

Nearby

Tornado Warnings in Nebraska, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.