Hail Swath Map Preview
The Sioux City, IA hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 1.00". There are 0 public hail reports, 2 public wind reports, and 0 nearby tornado reports listed for the August 20, 2021 event.
View the August 20, 2021 Sioux City, IA hail event on the free interactive hail map, then check a free Hail Report by ZIP to see a more local hail signal for your area.
Impact Area and Population for the Sioux City, IA Hail Map
The August 20, 2021 hail swath map for Sioux City, IA covers approximately 520 square miles and includes an estimated 34,995 people inside the mapped footprint. The largest mapped area is in the < 0.50" hail band, covering 302 square miles. The highest estimated population exposure is in the 0.50-0.75" hail band with 21,351 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 302 sq mi | 13,369 |
| 0.50-0.75" | 181 sq mi | 21,351 |
| 0.75-1.00" | 31 sq mi | 238 |
| 1.00-1.25" | 6 sq mi | 37 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the August 20, 2021 Sioux City, IA hail event may have reached your area.
Housing Exposure Inside the Sioux City, IA Hail Swath Map
Inside the August 20, 2021 hail swath map area for Sioux City, IA, HailGeeks estimates 13,638 single-family homes, 491 townhomes, and 5,707 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the 0.50-0.75" hail band, with 8,201 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 5,276 | 168 | 1,381 |
| 0.50-0.75" | 8,201 | 322 | 4,323 |
| 0.75-1.00" | 137 | 1 | 3 |
| 1.00-1.25" | 24 | 0 | 0 |
Use this table to review housing exposure by hail band for the August 20, 2021 Sioux City, IA hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the Sioux City, IA Hail Map
Hail from the August 20, 2021 storm was mapped across 17 counties in the Sioux City, IA region. Woodbury County, IA had the strongest mapped signal, peaking at 1.00" with roughly 10,055 single-family homes inside the swath.
County pages group every mapped hail event in the area. For a closer look, drop to the city or ZIP level below, or run a free Hail Report by Address.
Cities Inside the Sioux City, IA Hail Map
Zooming in, the swath touched 9 cities near Sioux City, IA. Sioux City, IA had the strongest mapped signal at 0.50", with an estimated 8,697 single-family homes exposed.
City cards show where the August 20, 2021 Sioux City, IA hail activity was mapped, but your ZIP can show a closer local signal. Get a free Hail Report by ZIP, and if the signal looks meaningful, ask a local pro about a Remote Hail Inspection to see whether an on-site roof or exterior review may be worth scheduling.
ZIP Codes Inside the Sioux City, IA Hail Swath Map
At the ZIP level, the August 20, 2021 Sioux City, IA hail map spans 28 ZIP codes. ZIP 51028 shows the strongest local signal, with mapped hail estimates up to 1.00" and an estimated single-family-home exposure of 127.
Check your ZIP in seconds to see whether hail activity from the August 20, 2021 Sioux City, IA event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the August 20, 2021 hail map for Sioux City, IA currently list 0 public hail reports, 2 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
| No public hail reports are available for this event. | ||||
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
August 20, 2021 6:16 PM CT | Pierson | IA | LARGE TREE SNAPPED. ALSO HAD 6 INCH DIAMETER TREE BRANCHES DOWN. | |
August 20, 2021 6:22 PM CT | 3 W Washta | IA | DELAYED REPORT VIA SOCIAL MEDIA. LARGE TREE BRANCH ESTIMATED AT 10 INCHES IN DIAMETER BROKEN. SOME DAMAGE TO CORN CROP ALSO NOTED. |
| Date & Time | Rating | City | State | Description |
|---|---|---|---|---|
| No public tornado reports are available for this event. | ||||
This table includes only public storm reports connected to the August 20, 2021 Sioux City, IA storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the Sioux City, IA Region
We found 6 more hail maps with reports from the same Sioux City, IA region as the August 20, 2021 event. These related maps cover storm dates from Aug 2, 2021 through Aug 12, 2021, with mapped hail estimates ranging from 0.75" to 4.00". In this set, the strongest related map reached 4.00", and the most recent map shown is from Aug 12, 2021.
If none of these related Sioux City, IA hail maps look close enough to your property, check a free Hail Report by Address. It reviews hail history for a specific location — not just the broader Sioux City, IA region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near Sioux City, IA
Not sure whether the August 20, 2021 Sioux City, IA hail map matters for your property? Start with a free Hail Report by Address to see whether hail activity was mapped for that property. If the property signal looks meaningful, you can choose a local pro serving the Sioux City, IA region and ask about a Remote Hail Inspection before deciding whether an on-site roof or exterior review is worth scheduling.
Check a specific property to see whether hail activity from the August 20, 2021 Sioux City, IA event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the Sioux City, IA region who can help you understand what the property hail signal may mean.
A participating local pro reviews property-level hail history remotely — not just the August 20, 2021 event — to help decide whether an on-site inspection may be worth scheduling.
A free Hail Report by Address and a Remote Hail Inspection can help you look beyond the August 20, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the Sioux City, IA region, but they can help you make a more informed next decision before anyone climbs on the roof.
Frequently Asked Questions
Common questions about the August 20, 2021 Sioux City, IA hail event.