Alert archive / Nebraska / Tornado Warnings in 2026

Tornado Warning 39, NWS Omaha, NE

May 22, 2026Cass County, Nebraska; Mills County, Iowa

NWS Omaha, NE issued this tornado warning at May 22, 2026, 5:47 PM CDT for Cass County, Nebraska; Mills County, Iowa. It was in force for 43 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
May 22, 2026, 5:47 PM CDT (22:47 UTC)
Expired
May 22, 2026, 6:30 PM CDT
In force
43 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

Counties Mills County, IA, Cass County, NE

The radar

The Omaha radar (KOAX), 62 km from the middle of the area, began a volume at 22:49 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The text

As transmitted.

847 
WFUS53 KOAX 222247
TOROAX
IAC129-NEC025-222330-
/O.NEW.KOAX.TO.W.0039.260522T2247Z-260522T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Omaha/Valley Nebraska
547 PM CDT Fri May 22 2026

The National Weather Service in Omaha has issued a

* Tornado Warning for...
  Southwestern Mills County in southwestern Iowa...
  East central Cass County in southeastern Nebraska...

* Until 630 PM CDT.

* At 546 PM CDT, a confirmed tornado was located over Beaver Lake, 
  or 13 miles south of Offutt AFB, moving northeast at 20 mph. This 
  storm has a history of producing brief tornadoes. 

  HAZARD...Damaging tornado.

  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.

* The tornado will be near...
  Pacific Junction around 555 PM CDT.

This includes Interstate 29 between mile markers 25 and 32.
 
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 4089 9589 4092 9593 4106 9580 4093 9559
TIME...MOT...LOC 2246Z 237DEG 16KT 4093 9586 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

KG
3 follow-up statements
221 
WWUS53 KOAX 222302
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
602 PM CDT Fri May 22 2026

NEC025-222311-
/O.CAN.KOAX.TO.W.0039.000000T0000Z-260522T2330Z/
Cass NE-
602 PM CDT Fri May 22 2026

...THE TORNADO WARNING FOR EAST CENTRAL CASS COUNTY IS CANCELLED...

The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

&&

LAT...LON 4093 9559 4091 9582 4094 9584 4098 9583
      4100 9586 4106 9580
TIME...MOT...LOC 2301Z 237DEG 16KT 4097 9578 

$$

IAC129-222330-
/O.CON.KOAX.TO.W.0039.000000T0000Z-260522T2330Z/
Mills IA-
602 PM CDT Fri May 22 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
SOUTHWESTERN MILLS COUNTY...

At 601 PM CDT, a severe thunderstorm capable of producing a tornado
was located 3 miles south of Pacific Junction, or 12 miles southeast 
of Offutt AFB, moving northeast at 20 mph. This storm has a history 
of producing brief tornadoes.

HAZARD...Tornado and quarter 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...
  Pacific Junction around 605 PM CDT.

This includes Interstate 29 between mile markers 27 and 32.
 
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 4093 9559 4091 9582 4094 9584 4098 9583
      4100 9586 4106 9580
TIME...MOT...LOC 2301Z 237DEG 16KT 4097 9578 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

KG
067 
WWUS53 KOAX 222309
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
609 PM CDT Fri May 22 2026

IAC129-222330-
/O.CON.KOAX.TO.W.0039.000000T0000Z-260522T2330Z/
Mills IA-
609 PM CDT Fri May 22 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
SOUTHWESTERN MILLS COUNTY...

At 609 PM CDT, a severe thunderstorm capable of producing a tornado
was located 3 miles southeast of Pacific Junction, or 13 miles 
southeast of Offutt AFB, moving northeast at 20 mph. This storm has 
a history of producing brief tornadoes.

HAZARD...Tornado and quarter 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
southwestern Mills County.

This includes Interstate 29 between mile markers 27 and 29.
 
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 4096 9564 4092 9579 4095 9582 4103 9575
TIME...MOT...LOC 2309Z 237DEG 16KT 4099 9574 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

KG
793 
WWUS53 KOAX 222323
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
623 PM CDT Fri May 22 2026

IAC129-222333-
/O.EXP.KOAX.TO.W.0039.000000T0000Z-260522T2330Z/
Mills IA-
623 PM CDT Fri May 22 2026

...THE TORNADO WARNING FOR SOUTHWESTERN MILLS COUNTY WILL EXPIRE AT
630 PM CDT...

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.

&&

LAT...LON 4096 9564 4092 9579 4095 9582 4103 9575
TIME...MOT...LOC 2323Z 237DEG 16KT 4102 9568 

$$

KG

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this tornado warning went out at May 22, 5:44 PM CDT, 3 minutes earlier. Its key messages:

  • A broken line of storms is forecast to move through this afternoon with a strong to severe storm or two possible. Hail is the primary hazard.
  • A warming trend begins this weekend with above normal temperatures expected to hold into next week.
  • Low chance (20-30%) for a few storms possible Sunday afternoon/evening, with our next better chance for showers and storms starting Wednesday through the end of next week.
Area forecast discussion, May 22, 5:44 PM CDT, 3 minutes before
Area Forecast Discussion
National Weather Service Omaha/Valley NE
544 PM CDT Fri May 22 2026

.KEY MESSAGES...

- A broken line of storms is forecast to move through this
  afternoon with a strong to severe storm or two possible. Hail
  is the primary hazard.

- A warming trend begins this weekend with above normal
  temperatures expected to hold into next week.

- Low chance (20-30%) for a few storms possible Sunday
  afternoon/evening, with our next better chance for showers and
  storms starting Wednesday through the end of next week.

&&

.DISCUSSION...
Issued at 1241 PM CDT Fri May 22 2026

Remnant showers from this morning's storms are exiting to the
east this afternoon. We're seeing clouds breaking up in the warm
sector of the Low over norht-central Nebraska out ahead of the
cold front which is just now moving into Knox, Antelope, and
Boone Counties. This front will be a focus for a line of
thunderstorms this afternoon, and any clearing ahead of storm
development will only aid in increasing instability and
potential storm strength. While shear is modest ~30kt 0-6km bulk
shear, instability has the potential to reach 1500 J/kg.
Hodographs show decent 0-1km shear leading to some potential for
a low- topped supercell or two. This could lead do a few
quarter-size hail reports, or damaging winds up to 60 mph, but
it's a very marginal threat (level 1 out of 5).

Once storms clear this evening, we'll see skies gradually clear
with winds shifting to the northwest. A surface High building in
from the southwest will bring warmer temperatures for the
weekend, starting with highs in the 70s on Saturday. Sunday
we see enhanced warm-air advection as weak ridging builds in
aloft which will lead to afternoon highs warming into the upper
70s to mid 80s. We do see a weak shortwave trough move through
during the afternoon and evening, developing a surface low over
north-central Nebraska/south-central South Dakota. This pulls in
a belt of moisture from the Gulf, potentially leading to a few
isolated to scattered showers or storms through the afternoon
and evening hours. Rain chances remain low, around 20-30%. SPC
does highlight, again, a marginal risk for severe storms, mainly
due to the ample amount of instability and decent shear
profile; however, moisture may be limited depending greatly on
how much we can advect in ahead of this system.

A deep upper-level trough digging on to the West Coast out of
the Gulf of Alaska will enhance southerly flow across the
Central CONUS early next week, maintaining above-normal
temperatures into midweek. This trough as it shifts closer will
lead to a more active weather pattern toward the latter half of
the week as we start to bring in more moisture up from the Gulf.

&&

.AVIATION /00Z TAFS THROUGH 00Z SUNDAY/...
Issued at 539 PM CDT Fri May 22 2026

A broken line of thunderstorms and MVFR conditions have formed
across far eastern Nebraska this evening, likely impacting KOMA
before clearing from west to east by 23/01-02Z. Afterwards, VFR
conditions are expected to prevail through the remainder of the
forecast period as ceilings gradually break up and improve
through the evening. A few southwesterly gusts up to 18 kts may
occur before winds calm (under 12 kts) into the evening and
become more westerly.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...None.
IA...None.

&&

DISCUSSION...McCoy
AVIATION...Wood
Hazardous weather outlook, May 22, 12:43 PM CDT, 5 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
1243 PM CDT Fri May 22 2026

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-231745-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-Page-
Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-Stanton-
Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-Saunders-Douglas-
Sarpy-Seward-Lancaster-Cass-Otoe-Saline-Jefferson-Gage-Johnson-
Nemaha-Pawnee-Richardson-
1243 PM CDT Fri May 22 2026

This Hazardous Weather Outlook is for southwest Iowa, west central
Iowa, east central Nebraska, northeast Nebraska and southeast
Nebraska.

.DAY ONE...This afternoon and tonight.

A broken line of thunderstorms is expected to develop in eastern
Nebraska by the late afternoon, pushing eastward into western Iowa
during the evening. A strong to severe storm or two remain possible,
with hail (up to ping pong ball sized) and strong wind gusts up to
60 mph the primary hazards under any stronger storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

Nearby

Tornado Warnings in Nebraska, 2026Tornado Warnings in Iowa, 2026Every tornado warning in 2026Tornadoes in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.