Alert archive / Nebraska / Tornado Warnings in 2016

Tornado Warning 4, NWS Cheyenne, WY

May 30, 2016Cheyenne County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 30, 2016, 2:28 PM MDT for Cheyenne County, Nebraska. It was in force for 32 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: May 30, 2016, 2:28 PM MDT (20:28 UTC)
Expired: May 30, 2016, 3:00 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 150 km from the middle of the area, began a volume at 20:27 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 (KDEN), launched 12:00Z, 8.5 hours before the alert went out and 140 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: 2218 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

240 
WFUS55 KCYS 302028
TORCYS
NEC033-302100-
/O.NEW.KCYS.TO.W.0004.160530T2028Z-160530T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
228 PM MDT MON MAY 30 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 300 PM MDT

* AT 226 PM MDT...A CONFIRMED LANDSPOUT TORNADO WAS LOCATED JUST
  WEST OF SIDNEY...MOVING EAST AT 10 MPH.

  HAZARD...TORNADO. 

  SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO. 

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS...AND VEHICLES. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTH CENTRAL CHEYENNE COUNTY.

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 53 AND
60.
 
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 4108 10307 4116 10308 4116 10293 4109 10293
TIME...MOT...LOC 2026Z 262DEG 9KT 4111 10297 

TORNADO...OBSERVED
HAIL...<.75IN

$$

COX

2 follow-up statements

829 
WWUS55 KCYS 302052
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
252 PM MDT MON MAY 30 2016

NEC033-302100-
/O.CON.KCYS.TO.W.0004.000000T0000Z-160530T2100Z/
CHEYENNE NE-
252 PM MDT MON MAY 30 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM MDT FOR SOUTH
CENTRAL CHEYENNE COUNTY...
    
AT 252 PM MDT...A STRONG THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER COLTON...OR NEAR SIDNEY...MOVING EAST AT 10 MPH.
LAW ENFORCEMENT REPORTED THAT THE TORNADO HAD DISSIPATED FOR NOW.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS...AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
SIDNEY AND SIDNEY AIRPORT. 

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 53 AND
60.
 
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 4108 10307 4116 10308 4116 10293 4109 10293
TIME...MOT...LOC 2052Z 262DEG 9KT 4112 10288 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

COX

668 
WWUS55 KCYS 302100
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
300 PM MDT MON MAY 30 2016

NEC033-302110-
/O.EXP.KCYS.TO.W.0004.000000T0000Z-160530T2100Z/
CHEYENNE NE-
300 PM MDT MON MAY 30 2016

...THE TORNADO WARNING FOR SOUTH CENTRAL CHEYENNE COUNTY HAS
EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.  HOWEVER SMALL HAIL
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4108 10307 4116 10308 4116 10293 4109 10293
TIME...MOT...LOC 1800Z 262DEG 9KT 4112 10288 

$$

RE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 6:30 PM MDT	Special Weather Statement	CYS	Cheyenne	45 min
May 29, 6:33 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	57 min
May 29, 7:46 PM MDT	Special Weather Statement	CYS	Cheyenne	44 min
May 30, 11:06 AM MDT	River Flood Warning	CYS	Scotts Bluff	4 days
May 30, 1:24 PM MDT	Special Weather Statement	CYS	Kimball	51 min
May 30, 2:05 PM MDT	Tornado Warning Tornado observed	CYS	Cheyenne	25 min
May 30, 4:47 PM MDT	Special Weather Statement	CYS	Scotts Bluff	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.