Alert archive / Nebraska / Tornado Warnings in 2018

Tornado Warning 2, NWS Cheyenne, WY

May 10, 2018Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 10, 2018, 5:13 PM MDT for Morrill County, Nebraska. It was in force for 32 min. 4 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: May 10, 2018, 5:13 PM MDT (23:13 UTC)
Expired: May 10, 2018, 5:45 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.75 in

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 173 km from the middle of the area, began a volume at 23:13 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
May 10, 5:13 PM MDT	TSTM WND DMG	S The Intersection Of H, NE	PUBLIC REPORTED A SEMI BLOW OVER DUE TO STRONG TSTM WINDS
May 10, 5:14 PM MDT	HAIL 0.25	5 S Bridgeport, NE	HAIL COVERS THE GROUND. VERY SRTONG WINDS 50 TO 60 MPH ESTIMATED.
May 10, 5:17 PM MDT	TORNADO	S The Intersection Of H, NE	REPORTS OF IRRIGATION PIVOT OVERTURNED, METAL ROOF TORN FROM A BUILDING. ALSO AT ABOUT 1710L WE RECIEVED A REPORT OF A TRUCK BLOW OVER IN ALDEN ABOUT 4 MILES TO THE SOUTHWEST OF THIS LOCATION.EXTENSIVE PROPERTY DAMAGE REPORTED IN BROADWATER WITH POWER LINES AN
May 10, 5:30 PM MDT	TSTM WND DMG	Broadwater, NE	TWO LARGE TREES DOWN. ONE FELL ON A PICKUP TRUCK, ANOTHER IS BLOCKING THE ROAD.

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
May 10, 1:41 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.2 hours before the alert went out and 196 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: 1685 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 371 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

956 
WFUS55 KCYS 102313
TORCYS
NEC123-102345-
/O.NEW.KCYS.TO.W.0002.180510T2313Z-180510T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
513 PM MDT THU MAY 10 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Southeastern Morrill County in the Panhandle of Nebraska...

* Until 545 PM MDT
    
* At 513 PM MDT, a severe thunderstorm capable of producing a tornado
  was located over The Intersection Of Highway 385 And 92, or 32
  miles south of Alliance, moving east at 40 mph.

  HAZARD...Tornado and baseball 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 tornadic thunderstorm will remain over mainly rural areas of
  southeastern Morrill County, including the following locations:
  Broadwater.

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 4152 10316 4169 10318 4185 10268 4176 10267
      4174 10264 4164 10263 4150 10264
TIME...MOT...LOC 2313Z 257DEG 35KT 4164 10296 

TORNADO...RADAR INDICATED
HAIL...2.75IN

$$

Hammer

2 follow-up statements

940 
WWUS55 KCYS 102324
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
524 PM MDT THU MAY 10 2018

NEC123-102345-
/O.CON.KCYS.TO.W.0002.000000T0000Z-180510T2345Z/
Morrill NE-
524 PM MDT THU MAY 10 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR
SOUTHEASTERN MORRILL COUNTY...
    
At 523 PM MDT, a severe thunderstorm capable of producing a tornado
was located near The Intersection Of Highway 385 And 92, or 31 miles
south of Alliance, moving east at 40 mph.

HAZARD...Tornado and baseball 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.

Locations impacted include...
Broadwater. 

People in Broadwater should seek shelter immediately!  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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 4151 10301 4172 10309 4185 10268 4176 10267
      4174 10264 4164 10263 4150 10264
TIME...MOT...LOC 2323Z 256DEG 33KT 4164 10289 

TORNADO...RADAR INDICATED
HAIL...2.75IN

$$

Hammer

999 
WWUS55 KCYS 102343
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
543 PM MDT THU MAY 10 2018

NEC123-102352-
/O.EXP.KCYS.TO.W.0002.000000T0000Z-180510T2345Z/
Morrill NE-
543 PM MDT THU MAY 10 2018

...THE TORNADO WARNING FOR SOUTHEASTERN MORRILL COUNTY WILL EXPIRE AT
545 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire. However, a Severe 
Thunderstorm Warning remains in effect for northeastern Morrill 
county until 630 PM MDT. 

A severe thunderstorm watch remains in effect until 700 PM MDT for
the Panhandle of Nebraska.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Cheyenne.

LAT...LON 4151 10301 4172 10309 4185 10268 4176 10267
      4174 10264 4164 10263 4150 10264
TIME...MOT...LOC 2342Z 257DEG 35KT 4168 10266 

$$

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 3:55 PM MDT	Special Weather Statement	CYS	Dawes	50 min
May 10, 4:09 PM MDT	Special Weather Statement	CYS	Box Butte	51 min
May 10, 4:18 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	42 min
May 10, 4:48 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Morrill	27 min
May 10, 5:41 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	29 min

Nearby

Tornado Warnings in Nebraska, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.