Alert archive / Nebraska / Tornado Warnings in 2018

Tornado Warning 31, NWS Cheyenne, WY

July 29, 2018Kimball County, Nebraska; Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 29, 2018, 2:54 PM MDT for Kimball County, Nebraska; Laramie County, Wyoming. It was in force for 36 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: Jul 29, 2018, 2:54 PM MDT (20:54 UTC)
Expired: Jul 29, 2018, 3:30 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Kimball County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 55 km from the middle of the area, began a volume at 20:57 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
Jul 29, 1:07 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.9 hours before the alert went out and 152 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: 181 J/kg
Mixed-layer CIN: -407 J/kg
Mixed-layer LCL: 1180 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

313 
WFUS55 KCYS 292054
TORCYS
NEC105-WYC021-292130-
/O.NEW.KCYS.TO.W.0031.180729T2054Z-180729T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
254 PM MDT SUN JUL 29 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Southwestern Kimball County in the Panhandle of Nebraska...
  Southeastern Laramie County in southeastern Wyoming...

* Until 330 PM MDT.
    
* At 254 PM MDT, a severe thunderstorm capable of producing a tornado
  was located near Panorama Point, or 24 miles southwest of Kimball,
  moving southeast at 35 mph.

  HAZARD...Tornado and golf 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...
  Panorama Point around 305 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.

&&

LAT...LON 4107 10434 4110 10386 4100 10381 4100 10432
      4101 10433
TIME...MOT...LOC 2054Z 336DEG 32KT 4107 10408 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

Lyons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 6:01 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball	29 min
Jul 28, 6:08 PM MDT	Special Weather Statement	CYS	Box Butte	52 min
Jul 28, 6:23 PM MDT	Special Weather Statement	CYS	Box Butte	52 min
Jul 28, 6:41 PM MDT	Special Weather Statement	CYS	Morrill	49 min
Jul 28, 6:55 PM MDT	Special Weather Statement	CYS	Kimball	50 min
Jul 28, 7:05 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	40 min
Jul 28, 7:35 PM MDT	Special Weather Statement	CYS	Banner	25 min
Jul 28, 7:49 PM MDT	Special Weather Statement	CYS	Kimball	26 min
Jul 28, 8:39 PM MDT	Special Weather Statement	CYS	Cheyenne	36 min
Jul 28, 8:55 PM MDT	Special Weather Statement	CYS	Kimball	35 min
Jul 28, 9:19 PM MDT	Special Weather Statement	CYS	Cheyenne	41 min
Jul 28, 9:36 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	24 min
Jul 29, 2:16 AM MDT	Special Weather Statement	CYS	Kimball	44 min
Jul 29, 1:43 PM MDT	Special Weather Statement	CYS	Scotts Bluff	47 min
Jul 29, 1:50 PM MDT	Special Weather Statement	CYS	Morrill	40 min
Jul 29, 1:57 PM MDT	Tornado Warning Tornado observed	CYS	Kimball	33 min
Jul 29, 2:13 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Morrill, Scotts Bluff	32 min
Jul 29, 2:26 PM MDT	Tornado Warning	CYS	Kimball	34 min
Jul 29, 2:52 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	38 min
Jul 29, 4:10 PM MDT	Special Weather Statement	CYS	Sioux	50 min
Jul 29, 4:56 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	34 min
Jul 29, 5:25 PM MDT	Special Weather Statement	CYS	Scotts Bluff	50 min
Jul 29, 5:40 PM MDT	Special Weather Statement	CYS	Kimball	50 min
Jul 29, 5:56 PM MDT	Special Weather Statement	CYS	Kimball	49 min
Jul 28, 6:28 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	35 min
Jul 28, 6:46 PM MDT	Special Weather Statement	CYS	Niobrara	44 min
Jul 28, 6:58 PM MDT	Special Weather Statement	CYS	Laramie	32 min
Jul 28, 7:18 PM MDT	Special Weather Statement	CYS	Platte	42 min
Jul 28, 7:36 PM MDT	Special Weather Statement	CYS	Platte	39 min
Jul 28, 7:44 PM MDT	Severe Thunderstorm Warning	CYS	Platte	46 min
Jul 28, 8:30 PM MDT	Special Weather Statement	CYS	Goshen	45 min
Jul 29, 3:22 AM MDT	Red Flag Warning	CYS		16 hr
Jul 29, 1:01 PM MDT	Special Weather Statement	CYS	Goshen	44 min
Jul 29, 1:05 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	25 min
Jul 29, 1:13 PM MDT	Special Weather Statement	CYS	Platte	47 min
Jul 29, 1:25 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	50 min
Jul 29, 1:28 PM MDT	Severe Thunderstorm Warning	CYS	Platte	47 min
Jul 29, 1:39 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie, Platte	51 min
Jul 29, 1:44 PM MDT	Tornado Warning	CYS	Laramie, Platte	14 min
Jul 29, 2:11 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie, Platte	49 min
Jul 29, 2:20 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	25 min
Jul 29, 2:28 PM MDT	Tornado Warning	CYS	Laramie	47 min
Jul 29, 2:53 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jul 29, 3:14 PM MDT	Tornado Warning	CYS	Laramie	29 min
Jul 29, 3:19 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	41 min
Jul 29, 3:29 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie, Platte	61 min
Jul 29, 3:30 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	45 min
Jul 29, 3:41 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	30 min
Jul 29, 3:42 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	33 min
Jul 29, 3:46 PM MDT	Flash Flood Warning	CYS	Laramie	3 hr
Jul 29, 4:04 PM MDT	Special Weather Statement	CYS	Carbon	41 min
Jul 29, 4:08 PM MDT	Special Weather Statement	CYS	Albany	52 min
Jul 29, 4:17 PM MDT	Tornado Warning	CYS	Albany, Laramie, Platte	43 min
Jul 29, 4:21 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie, Platte	39 min
Jul 29, 4:21 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	39 min
Jul 29, 4:36 PM MDT	Special Weather Statement	CYS		39 min
Jul 29, 4:42 PM MDT	Special Weather Statement	CYS	Platte	48 min
Jul 29, 4:43 PM MDT	Special Weather Statement	CYS	Albany	47 min
Jul 29, 4:45 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse, Platte	45 min
Jul 29, 4:55 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	19 min
Jul 29, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	47 min
Jul 29, 5:03 PM MDT	Special Weather Statement	CYS	Laramie	42 min
Jul 29, 5:29 PM MDT	Severe Thunderstorm Warning	CYS	Albany	46 min

Nearby

Tornado Warnings in Nebraska, 2018 Tornado Warnings in Wyoming, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.