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Home Return to list Severe Thunderstorm Warning 0186 Issued by the Omaha / Valley Forecast Office
Action: New Issued At: 2026-05-18 18:37:31
725
WUUS53 KOAX 182337
SVROAX
IAC129-137-155-190015-
/O.NEW.KOAX.SV.W.0186.260518T2337Z-260519T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
637 PM CDT Mon May 18 2026
The National Weather Service in Omaha has issued a
* Severe Thunderstorm Warning for...
Northwestern Montgomery County in southwestern Iowa...
Northeastern Mills County in southwestern Iowa...
Southeastern Pottawattamie County in southwestern Iowa...
* Until 715 PM CDT.
* At 636 PM CDT, a severe thunderstorm was located over Malvern, or
18 miles west of Red Oak, moving northeast at 55 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Hastings around 640 PM CDT.
Henderson around 645 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Iowa.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4094 9546 4110 9561 4139 9516 4138 9515
4116 9516 4116 9499
TIME...MOT...LOC 2336Z 233DEG 48KT 4102 9558
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
McCoy
Action: Continued Issued At: 2026-05-18 18:50:31
160
WWUS53 KOAX 182350
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
650 PM CDT Mon May 18 2026
IAC129-137-155-190015-
/O.CON.KOAX.SV.W.0186.000000T0000Z-260519T0015Z/
Montgomery IA-Mills IA-Pottawattamie IA-
650 PM CDT Mon May 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHWESTERN MONTGOMERY...EAST CENTRAL MILLS AND SOUTHEASTERN
POTTAWATTAMIE COUNTIES...
At 650 PM CDT, a severe thunderstorm was located 5 miles southeast of
Henderson, or 8 miles northwest of Red Oak, moving northeast at 55
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Elliott around 655 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Iowa.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4098 9545 4106 9552 4133 9515 4116 9516
4116 9501
TIME...MOT...LOC 2350Z 234DEG 49KT 4111 9533
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
McCoy
Action: Cancelled Issued At: 2026-05-18 18:52:31
195
WWUS53 KOAX 182351 RRA
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
651 PM CDT Mon May 18 2026
IAC129-137-155-190001-
/O.CAN.KOAX.SV.W.0186.000000T0000Z-260519T0015Z/
Montgomery IA-Mills IA-Pottawattamie IA-
651 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONTGOMERY...EAST
CENTRAL MILLS AND SOUTHEASTERN POTTAWATTAMIE COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Iowa.
&&
LAT...LON 4098 9545 4106 9552 4133 9515 4116 9516
4116 9501
TIME...MOT...LOC 2350Z 233DEG 48KT 4112 9531
$$
McCoy
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