959 
WUUS53 KDMX 180119
SVRDMX
IAC025-147-151-161-180215-
/O.NEW.KDMX.SV.W.0167.260518T0119Z-260518T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
819 PM CDT Sun May 17 2026

The National Weather Service in Des Moines has issued a

* Severe Thunderstorm Warning for...
  Pocahontas County in northwestern Iowa...
  Sac County in west central Iowa...
  Calhoun County in west central Iowa...
  Western Palo Alto County in northwestern Iowa...

* Until 915 PM CDT.

* At 818 PM CDT, a severe thunderstorm was located over Holstein, or
  11 miles north of Ida Grove, moving northeast at 55 mph.

  HAZARD...70 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Emmetsburg, Sac City, Pocahontas, Rockwell City, Lake City, Manson,
  Laurens, Lake View, Odebolt, Five Island Lake, Black Hawk Lake,
  North Twin Lake, South Twin Lake, Silver Lake, Rush Lake, Wall
  Lake, Schaller, Ruthven, Pomeroy, and Fonda.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. This storm is producing widespread 
wind damage across over west central Iowa. SEEK SHELTER NOW inside a 
sturdy structure and stay away from windows!

A Tornado Watch remains in effect until 100 AM CDT for northwestern
Iowa. A Tornado Watch also remains in effect until 300 AM CDT for
west central Iowa.

&&

LAT...LON 4256 9539 4256 9492 4314 9491 4322 9467
      4225 9443 4222 9532 4247 9532 4248 9539
TIME...MOT...LOC 0118Z 244DEG 48KT 4251 9550 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Donavon

062 
WWUS53 KDMX 180126
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
826 PM CDT Sun May 17 2026

IAC025-147-151-161-180215-
/O.CON.KDMX.SV.W.0167.000000T0000Z-260518T0215Z/
Pocahontas IA-Sac IA-Calhoun IA-Palo Alto IA-
826 PM CDT Sun May 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR POCAHONTAS...SAC...CALHOUN AND WESTERN PALO ALTO COUNTIES...

At 825 PM CDT, a severe thunderstorm was located near Galva, or 11
miles southwest of Storm Lake, and is nearly stationary.

THIS IS A DESTRUCTIVE STORM!.

HAZARD...80 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
Emmetsburg, Sac City, Pocahontas, Rockwell City, Lake City, Manson,
Laurens, Lake View, Odebolt, Five Island Lake, Black Hawk Lake, North
Twin Lake, South Twin Lake, Silver Lake, Rush Lake, Wall Lake,
Schaller, Ruthven, Pomeroy, and Fonda.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for northwestern
Iowa. A Tornado Watch also remains in effect until 300 AM CDT for
west central Iowa.

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. This storm is producing widespread 
wind damage!. SEEK SHELTER NOW inside a sturdy structure and stay 
away from windows.

&&

LAT...LON 4256 9539 4256 9492 4314 9491 4322 9467
      4225 9443 4222 9532 4247 9532 4248 9539
TIME...MOT...LOC 0125Z 244DEG 48KT 4255 9538 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH

$$

Donavon

766 
WWUS53 KDMX 180148
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
848 PM CDT Sun May 17 2026

IAC025-147-151-161-180215-
/O.CON.KDMX.SV.W.0167.000000T0000Z-260518T0215Z/
Pocahontas IA-Sac IA-Calhoun IA-Palo Alto IA-
848 PM CDT Sun May 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR POCAHONTAS...SAC...CALHOUN AND WESTERN PALO ALTO COUNTIES...

At 847 PM CDT, severe thunderstorms were located along a line
extending from near Royal to near Albert City to Lake View, moving
northeast at 65 mph.

THESE ARE DESTRUCTIVE STORMS.

HAZARD...80 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
Emmetsburg, Sac City, Pocahontas, Rockwell City, Lake City, Manson,
Laurens, Lake View, Odebolt, Five Island Lake, Black Hawk Lake, North
Twin Lake, South Twin Lake, Silver Lake, Rush Lake, Wall Lake,
Schaller, Ruthven, Pomeroy, and Fonda.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for northwestern
Iowa. A Tornado Watch also remains in effect until 300 AM CDT for
west central Iowa.

For your protection move to an interior room on the lowest floor of a
building.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 4256 9539 4256 9492 4314 9491 4322 9467
      4225 9443 4222 9532 4247 9532 4248 9539
TIME...MOT...LOC 0147Z 239DEG 57KT 4311 9525 4281 9498 4230 9504 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH

$$

Donavon