Alert archive / Nebraska / Tornado Warnings in 2021

Tornado Warning 4, NWS Cheyenne, WY

July 9, 2021Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 9, 2021, 6:07 PM MDT for Morrill 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 9, 2021, 6:07 PM MDT (00:07 UTC)
Expired: Jul 9, 2021, 6:33 PM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 4.0 in

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 173 km from the middle of the area, began a volume at 00:07 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 9, 6:19 PM MDT	HAIL 3.3	9 Ne Angora, NE
Jul 9, 6:20 PM MDT	HAIL 2.5	12 Ssw Alliance, NE

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 9, 2:16 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 216 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: 2799 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1859 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

085 
WFUS55 KCYS 100007
TORCYS
NEC123-100045-
/O.NEW.KCYS.TO.W.0004.210710T0007Z-210710T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
607 PM MDT Fri Jul 9 2021

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Northeastern Morrill County in the Panhandle of Nebraska...

* Until 645 PM MDT.
    
* At 607 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 9 miles north of Angora, or 12 miles southwest of
  Alliance, moving southeast at 30 mph.

  HAZARD...Tornado and softball 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...
  Angora around 620 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 4173 10301 4200 10320 4201 10307 4200 10291
      4189 10271
TIME...MOT...LOC 0007Z 319DEG 25KT 4201 10309 

TORNADO...RADAR INDICATED
HAIL...4.00IN

$$

Brothers

2 follow-up statements

053 
WWUS55 KCYS 100025
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
625 PM MDT Fri Jul 9 2021

NEC123-100045-
/O.CON.KCYS.TO.W.0004.000000T0000Z-210710T0045Z/
Morrill NE-
625 PM MDT Fri Jul 9 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM MDT FOR
NORTHEASTERN MORRILL COUNTY...
    
At 624 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Angora, or 13 miles southwest of Alliance, moving
southeast at 30 mph.

HAZARD...Tornado and softball 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
northeastern Morrill County.

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 4175 10297 4194 10307 4198 10298 4187 10275
TIME...MOT...LOC 0024Z 319DEG 25KT 4192 10298 

TORNADO...RADAR INDICATED
HAIL...4.00IN

$$

Brothers

515 
WWUS55 KCYS 100033
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
633 PM MDT Fri Jul 9 2021

NEC123-100042-
/O.CAN.KCYS.TO.W.0004.000000T0000Z-210710T0045Z/
Morrill NE-
633 PM MDT Fri Jul 9 2021

...THE TORNADO WARNING FOR NORTHEASTERN MORRILL COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened and has exited the 
warned area. Therefore, the warning has been cancelled.  However 
large hail and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska.

Remember, a Severe Thunderstorm Warning still remains in effect for
Morril County until 645 PM MDT.

LAT...LON 4175 10297 4194 10307 4198 10298 4187 10275
TIME...MOT...LOC 0031Z 319DEG 25KT 4188 10293 

$$

Brothers

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:04 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	41 min
Jul 9, 8:31 PM MDT	Tornado Warning	CYS	Sioux	44 min
Jul 9, 8:47 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	43 min
Jul 9, 9:01 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	44 min
Jul 9, 9:22 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	38 min
Jul 9, 9:33 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Morrill, Sioux	57 min

Nearby

Tornado Warnings in Nebraska, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.