Alert archive / Nebraska / Tornado Warnings in 2016

Tornado Warning 16, NWS Cheyenne, WY

July 29, 2016Cheyenne County, Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 29, 2016, 5:42 PM MDT for Cheyenne County, Morrill County, Nebraska. It was in force for 34 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, 5:42 PM MDT (23:42 UTC)
Expired: Jul 29, 2016, 6:16 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

Counties Cheyenne County, NE, Morrill County, NE

The radar

The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 23:42 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, 11.7 hours before the alert went out and 167 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.

137 
WFUS55 KCYS 292342
TORCYS
NEC033-123-300030-
/O.NEW.KCYS.TO.W.0016.160729T2342Z-160730T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
542 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...
  SOUTHERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 630 PM MDT
    
* AT 541 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR GURLEY...OR 15 MILES NORTHWEST OF
  SIDNEY... MOVING SOUTH AT 10 MPH. THIS STORM HAS A HISTORY OF
  PRODUCING A TORNADO. 

  HAZARD...TORNADO AND HAIL UP TO TWO INCHES IN DIAMETER. 

  SOURCE...RADAR INDICATED ROTATION. HOWEVER...SPOTTERS CONFIRMED A
           TORNADO AROUND 520 PM WITH THIS STORM. 

  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...
  GURLEY AROUND 555 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.

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

&&

LAT...LON 4145 10317 4146 10303 4127 10285 4119 10311
TIME...MOT...LOC 2341Z 341DEG 10KT 4134 10310 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

MAZUR

2 follow-up statements

277 
WWUS55 KCYS 292357
SVSCYS

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

NEC123-300007-
/O.CAN.KCYS.TO.W.0016.000000T0000Z-160730T0030Z/
MORRILL NE-
557 PM MDT FRI JUL 29 2016

...THE TORNADO WARNING FOR SOUTHERN MORRILL COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

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

LAT...LON 4135 10310 4138 10300 4126 10290 4120 10306
      4120 10308
TIME...MOT...LOC 2357Z 337DEG 15KT 4128 10305 

$$

NEC033-300030-
/O.CON.KCYS.TO.W.0016.000000T0000Z-160730T0030Z/
CHEYENNE NE-
557 PM MDT FRI JUL 29 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR NORTH
CENTRAL CHEYENNE COUNTY...
    
AT 557 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR GURLEY...OR 11 MILES NORTH OF SIDNEY...MOVING SOUTH
AT 15 MPH.

HAZARD...TORNADO AND TWO INCH 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTH CENTRAL CHEYENNE COUNTY.

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.

IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL NEAREST LAW ENFORCEMENT AGENCY
WHO WILL SEND YOUR REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE
PATH OF DANGEROUS WEATHER.

&&

LAT...LON 4135 10310 4138 10300 4126 10290 4120 10306
      4120 10308
TIME...MOT...LOC 2357Z 337DEG 15KT 4128 10305 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

MAZUR

044 
WWUS55 KCYS 300016
SVSCYS

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

NEC033-300025-
/O.CAN.KCYS.TO.W.0016.000000T0000Z-160730T0030Z/
CHEYENNE NE-
616 PM MDT FRI JUL 29 2016

...THE TORNADO WARNING FOR CENTRAL CHEYENNE COUNTY IS CANCELLED...
    
THE TORNADIC POTENTIAL OUT OF THE THUNDERSTORM HAS DIMINISHED.
HOWEVER...LARGE HAIL IS STILL POSSIBLE WITH THIS STORM AND A SEVERE
THUNDERSTORM WARNING HAS BEEN ISSUED FOR CENTRAL CHEYENNE COUNTY.

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

LAT...LON 4135 10310 4138 10300 4126 10290 4120 10306
      4120 10308
TIME...MOT...LOC 0010Z 341DEG 10KT 4123 10303 

$$

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, 5:09 PM MDT	Tornado Warning	CYS	Cheyenne, Morrill	36 min
Jul 29, 5:19 PM MDT	Special Weather Statement	CYS	Scotts Bluff	26 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.