Alert archive / Nebraska / Tornado Warnings in 2015

Tornado Warning 12, NWS Cheyenne, WY

June 25, 2015Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 25, 2015, 5:44 PM MDT for Morrill County, Nebraska. It was in force for 22 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: Jun 25, 2015, 5:44 PM MDT (23:44 UTC)
Expired: Jun 25, 2015, 6:06 PM MDT
In force: 22 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 160 km from the middle of the area, began a volume at 23:45 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 25, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.7 hours before the alert went out and 193 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: 2770 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

439 
WFUS55 KCYS 252344
TORCYS
NEC123-260030-
/O.NEW.KCYS.TO.W.0012.150625T2344Z-150626T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
544 PM MDT THU JUN 25 2015

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 630 PM MDT
    
* AT 543 PM MDT...A SEVERE THUNDERSTORM WITH A HISTORY OF PRODUCING 
  TORNADOES WAS LOCATED NEAR BRIDGEPORT...OR 32 MILES SOUTH OF 
  ALLIANCE...MOVING SOUTHEAST AT 30 MPH.

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

  SOURCE...RADAR INDICATED ROTATION. THIS STORM HAS A HISTORY OF     
  PRODUCING TORNADOES. PEOPLE IN BRIDGEPORT SHOULD SEEK SHELTER 
  IMMEDIATELY. 

  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...
  THE INTERSECTION OF HIGHWAY 385 AND 92 AROUND 555 PM MDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
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 IN A MOBILE
HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

&&

LAT...LON 4144 10292 4144 10321 4167 10333 4181 10318
      4173 10264 4163 10263
TIME...MOT...LOC 2343Z 302DEG 28KT 4165 10309 

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

$$

HAMMER

1 follow-up statement

583 
WWUS55 KCYS 260006
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
606 PM MDT THU JUN 25 2015

NEC123-260016-
/O.CAN.KCYS.TO.W.0012.000000T0000Z-150626T0030Z/
MORRILL NE-
606 PM MDT THU JUN 25 2015

...THE TORNADO WARNING FOR SOUTHERN MORRILL COUNTY IS CANCELLED...
                
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 CANCELLED. HOWEVER SMALL HAIL AND 
HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
CENTRAL NEBRASKA.

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

LAT...LON 4144 10292 4144 10321 4167 10333 4181 10318
      4173 10264 4163 10263
TIME...MOT...LOC 0004Z 302DEG 28KT 4155 10289 

$$

HAMMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 10:33 AM MDT	Severe Thunderstorm Warning	CYS	Dawes	42 min
Jun 25, 11:18 AM MDT	Areal Flood Advisory	CYS	Dawes, Sioux	117 min
Jun 25, 11:58 AM MDT	Special Weather Statement	CYS	Dawes	47 min
Jun 25, 12:00 PM MDT	Special Weather Statement	CYS	Dawes	45 min
Jun 25, 12:22 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	38 min
Jun 25, 1:00 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	30 min
Jun 25, 3:34 PM MDT	Special Weather Statement	CYS	Banner	26 min
Jun 25, 4:06 PM MDT	Special Weather Statement	CYS	Dawes	39 min
Jun 25, 4:09 PM MDT	Special Weather Statement	CYS	Banner	51 min
Jun 25, 4:35 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	40 min
Jun 25, 4:37 PM MDT	Flash Flood Warning	CYS	Dawes	3 hr
Jun 25, 4:51 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball, Morrill, Scotts Bluff	24 min
Jun 25, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill, Scotts Bluff	47 min
Jun 25, 5:05 PM MDT	Tornado Warning	CYS	Morrill, Scotts Bluff	40 min
Jun 25, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Morrill	49 min

Nearby

Tornado Warnings in Nebraska, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.