Alert archive / Nebraska / Tornado Warnings in 2017

Tornado Warning 3, NWS Cheyenne, WY

May 26, 2017Laramie County, Wyoming; Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 26, 2017, 6:38 PM MDT for Laramie County, Wyoming; Banner County, Kimball County, Nebraska. It was in force for 37 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: May 26, 2017, 6:38 PM MDT (00:38 UTC)
Expired: May 26, 2017, 7:15 PM MDT
In force: 37 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

Counties Banner County, NE, Kimball County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 60 km from the middle of the area, began a volume at 00:37 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 26, 7:05 PM MDT	HAIL 0.25	3 W Albin, WY	SOFT HAIL. HEAVY RAIN AS WELL.

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 26, 1:00 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.6 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: 1044 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1740 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 9.5

Open this sounding in Storm Lab

The text

As transmitted.

931 
WFUS55 KCYS 270038
TORCYS
NEC007-105-WYC021-270115-
/O.NEW.KCYS.TO.W.0003.170527T0038Z-170527T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
638 PM MDT FRI MAY 26 2017

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Northwestern Kimball County in the Panhandle of Nebraska...
  Southwestern Banner County in the Panhandle of Nebraska...
  East central Laramie County in southeastern Wyoming...

* Until 715 PM MDT
    
* At 637 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles southeast of Gun Barrel, or 31 miles west of
  Kimball, moving east at 35 mph.

  HAZARD...Tornado and ping pong ball 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...
  Albin around 650 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 4123 10434 4138 10437 4151 10382 4124 10377
TIME...MOT...LOC 0037Z 262DEG 29KT 4134 10424 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Levin

2 follow-up statements

352 
WWUS55 KCYS 270054
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
654 PM MDT FRI MAY 26 2017

NEC007-105-WYC021-270115-
/O.CON.KCYS.TO.W.0003.000000T0000Z-170527T0115Z/
Kimball NE-Banner NE-Laramie WY-
654 PM MDT FRI MAY 26 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
NORTHWESTERN KIMBALL...SOUTHWESTERN BANNER AND EAST CENTRAL LARAMIE
COUNTIES...
    
At 654 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Albin, or 24 miles northwest of Kimball, moving east
at 40 mph.

HAZARD...Tornado and ping pong ball 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
northwestern Kimball...southwestern Banner and east central Laramie
Counties.

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 4123 10434 4138 10437 4151 10382 4124 10377
TIME...MOT...LOC 0054Z 272DEG 35KT 4137 10409 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Rubin

745 
WWUS55 KCYS 270106
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
706 PM MDT FRI MAY 26 2017

NEC007-105-WYC021-270115-
/O.EXP.KCYS.TO.W.0003.000000T0000Z-170527T0115Z/
Kimball NE-Banner NE-Laramie WY-
706 PM MDT FRI MAY 26 2017

...THE TORNADO WARNING FOR NORTHWESTERN KIMBALL...SOUTHWESTERN BANNER
AND EAST CENTRAL LARAMIE COUNTIES WILL EXPIRE AT 715 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 small hail,
gusty winds and heavy rain are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 1000 PM MDT for
the Panhandle of Nebraska...and southeastern Wyoming.

LAT...LON 4123 10434 4138 10437 4151 10382 4124 10377
TIME...MOT...LOC 0105Z 262DEG 29KT 4138 10397 

$$

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 6:00 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	40 min
May 26, 6:08 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	67 min
May 26, 7:10 PM MDT	Special Weather Statement	CYS	Laramie	65 min
May 26, 7:39 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	32 min
May 26, 7:14 PM MDT	Special Weather Statement	CYS	Banner, Kimball	46 min
May 26, 8:54 PM MDT	Special Weather Statement	CYS	Cheyenne	36 min

Nearby

Tornado Warnings in Nebraska, 2017 Tornado Warnings in Wyoming, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.