Alert archive / Nebraska / Tornado Warnings in 2018

Tornado Warning 26, NWS Cheyenne, WY

July 28, 2018Cheyenne County, Kimball County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 28, 2018, 5:34 PM MDT for Cheyenne County, Kimball County, Nebraska. It was in force for 26 min. 2 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: Jul 28, 2018, 5:34 PM MDT (23:34 UTC)
Expired: Jul 28, 2018, 6:00 PM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 2.75 in

Counties Cheyenne County, NE, Kimball County, NE

The radar

The Cheyenne radar (KCYS), 94 km from the middle of the area, began a volume at 23:37 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
Jul 28, 5:40 PM MDT	TORNADO	3 Sw Kimball, NE	DEPUTY REPORTED THAT HE WAS WATCHING SOME ROTATION JUST TO THE SOUTHWEST OF KIMBALL WHEN IT BECAME RAIN WRAPPED AND HE LOST SIGHT OF IT. VERY HEAVY RAIN AND WIND HIT THE TRUCK AND IT WAS SPUN 45 DEGREES. CORRECTED FOR LOCATION.
Jul 28, 5:42 PM MDT	HAIL 2.75	Kimball, NE	REPORTED AT THE LANDFILL

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 28, 2:34 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.6 hours before the alert went out and 142 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: 281 J/kg
Mixed-layer CIN: -374 J/kg
Mixed-layer LCL: 928 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

076 
WFUS55 KCYS 282334
TORCYS
NEC033-105-290000-
/O.NEW.KCYS.TO.W.0026.180728T2334Z-180729T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
534 PM MDT SAT JUL 28 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Southwestern Cheyenne County in the Panhandle of Nebraska...
  Southeastern Kimball County in the Panhandle of Nebraska...

* Until 600 PM MDT.

* At 534 PM MDT, a confirmed tornado was located near Kimball
  Airport, or 7 miles south of Kimball, moving southeast at 25 mph.

  HAZARD...Damaging tornado and baseball size hail.

  SOURCE...Weather spotters confirmed tornado.

  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
  southwestern Cheyenne and southeastern Kimball Counties.

This includes Interstate 80 in Nebraska between mile markers 18 and
21.
 
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 4114 10383 4124 10367 4100 10335 4100 10374
TIME...MOT...LOC 2334Z 327DEG 22KT 4112 10369 

TORNADO...OBSERVED
HAIL...2.75IN

$$

Trudel

1 follow-up statement

126 
WWUS55 KCYS 282350
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
550 PM MDT SAT JUL 28 2018

NEC033-105-290000-
/O.CON.KCYS.TO.W.0026.000000T0000Z-180729T0000Z/
Cheyenne NE-Kimball NE-
550 PM MDT SAT JUL 28 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM MDT FOR
SOUTHWESTERN CHEYENNE AND SOUTHEASTERN KIMBALL COUNTIES...
    
At 549 PM MDT, a confirmed tornado was located 10 miles south of
Kimball Airport, or 13 miles south of Kimball, moving southeast at 25
mph.

HAZARD...Damaging tornado and baseball size hail reported.

SOURCE...Weather spotters confirmed tornado.

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
southwestern Cheyenne and southeastern Kimball Counties.

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 4112 10379 4120 10362 4100 10335 4100 10374
TIME...MOT...LOC 2349Z 327DEG 22KT 4104 10362 

TORNADO...OBSERVED
HAIL...2.75IN

$$

Trudel

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:56 AM MDT	Special Weather Statement	CYS	Morrill	49 min
Jul 28, 3:55 PM MDT	Severe Thunderstorm Warning	CYS	Banner	35 min
Jul 28, 4:08 PM MDT	Special Weather Statement	CYS	Banner	52 min
Jul 28, 4:29 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	46 min
Jul 28, 4:35 PM MDT	Special Weather Statement	CYS	Sioux	40 min
Jul 28, 4:51 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	39 min
Jul 28, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	47 min
Jul 28, 5:53 PM MDT	Flash Flood Warning	CYS	Cheyenne, Kimball	4 hr

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.