Parts of central and northwest Iowa have been upgraded to a moderate risk (level 4 of 5) for severe weather tonight. This means widespread severe weather is likely with tornadoes, damaging wind gusts, and large hail all expected with storms that form.
The initial line of storms will quickly move northeast, but another line of storms will form along a boundary in eastern Nebraska/far western Iowa after 8 PM. This secondary line of storms will produce damaging wind gusts, isolated tornadoes, and some large hail. The best potential for tornadoes will be west of I-35 and north of I-80 — in areas stretching from Algona, Fort Dodge, Jefferson, and Audubon and west.
Threats and timing
- Tornadoes: Multiple tornadoes are possible today. A few are possible in NW Iowa between 5 and 9 PM, but many will also be possible between 9 and 11 PM. This will make them especially difficult to see.
- Hail: Large hail over golf ball-size are possible, especially in NW Iowa between 5 and 7 PM. Some large hail at or larger than 1″ is possible with the second line after 9 PM.
- Wind: Damaging wind gusts are likely, especially with the second line that will form in far western Iowa after 8 PM. It looks to approach the I-35 corridor between 11 PM and midnight.
What to do now
- Go over your plan for severe weather and make sure you have multiple ways to get weather information.
- Know the difference between a watch and a warning.
- Know where to go if you are at home or not.