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Home Return to list Tornado Warning 0021 Issued by the Omaha / Valley Forecast Office
Action: New Issued At: 2026-05-17 20:29:08
234
WFUS53 KOAX 180128
TOROAX
IAC085-155-180215-
/O.NEW.KOAX.TO.W.0021.260518T0128Z-260518T0215Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Omaha/Valley Nebraska
828 PM CDT Sun May 17 2026
The National Weather Service in Omaha has issued a
* Tornado Warning for...
Northwestern Pottawattamie County in southwestern Iowa...
Eastern Harrison County in southwestern Iowa...
* Until 915 PM CDT.
* At 828 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Missouri Valley, or 11 miles east of Blair, moving
northeast at 45 mph.
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...
Missouri Valley at 830 PM
Logan around 835 PM CDT.
This includes Interstate 29 between mile markers 68 and 79.
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 4141 9588 4153 9600 4155 9601 4155 9603
4186 9556 4160 9556 4160 9551
TIME...MOT...LOC 0128Z 233DEG 38KT 4153 9591
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
BLB
Action: Cancelled Issued At: 2026-05-17 20:45:08
674
WWUS53 KOAX 180145
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
845 PM CDT Sun May 17 2026
IAC155-180154-
/O.CAN.KOAX.TO.W.0021.000000T0000Z-260518T0215Z/
Pottawattamie IA-
845 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR NORTHWESTERN POTTAWATTAMIE COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Iowa.
&&
LAT...LON 4154 9568 4170 9578 4186 9556 4160 9556
4160 9551
TIME...MOT...LOC 0144Z 226DEG 45KT 4163 9565
$$
IAC085-180215-
/O.CON.KOAX.TO.W.0021.000000T0000Z-260518T0215Z/
Harrison IA-
845 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR EASTERN
HARRISON COUNTY...
At 844 PM CDT, a severe thunderstorm capable of producing a tornado
was located 5 miles northwest of Persia, or 16 miles west of Harlan,
moving northeast at 50 mph.
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
eastern Harrison 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 4154 9568 4170 9578 4186 9556 4160 9556
4160 9551
TIME...MOT...LOC 0144Z 226DEG 45KT 4163 9565
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
BLB
Action: Continued Issued At: 2026-05-17 20:45:08
674
WWUS53 KOAX 180145
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
845 PM CDT Sun May 17 2026
IAC155-180154-
/O.CAN.KOAX.TO.W.0021.000000T0000Z-260518T0215Z/
Pottawattamie IA-
845 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR NORTHWESTERN POTTAWATTAMIE COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Iowa.
&&
LAT...LON 4154 9568 4170 9578 4186 9556 4160 9556
4160 9551
TIME...MOT...LOC 0144Z 226DEG 45KT 4163 9565
$$
IAC085-180215-
/O.CON.KOAX.TO.W.0021.000000T0000Z-260518T0215Z/
Harrison IA-
845 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR EASTERN
HARRISON COUNTY...
At 844 PM CDT, a severe thunderstorm capable of producing a tornado
was located 5 miles northwest of Persia, or 16 miles west of Harlan,
moving northeast at 50 mph.
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
eastern Harrison 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 4154 9568 4170 9578 4186 9556 4160 9556
4160 9551
TIME...MOT...LOC 0144Z 226DEG 45KT 4163 9565
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
BLB
Action: Cancelled Issued At: 2026-05-17 20:53:39
818
WWUS53 KOAX 180153
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
853 PM CDT Sun May 17 2026
IAC085-180203-
/O.CAN.KOAX.TO.W.0021.000000T0000Z-260518T0215Z/
Harrison IA-
853 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR EASTERN HARRISON COUNTY IS CANCELLED...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.
A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Iowa.
&&
LAT...LON 4154 9568 4170 9578 4186 9556 4160 9556
4160 9551
TIME...MOT...LOC 0151Z 233DEG 38KT 4169 9555
$$
BLB
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