Hail Swath Map Preview
The Saint Louis, MO hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 1.50". There are 12 public hail reports, 13 public wind reports, and 0 nearby tornado reports listed for the March 27, 2021 event.
View the March 27, 2021 Saint Louis, MO 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 Saint Louis, MO Hail Map
The March 27, 2021 hail swath map for Saint Louis, MO covers approximately 1,841 square miles and includes an estimated 439,144 people inside the mapped footprint. The largest mapped area is in the 0.50-0.75" hail band, covering 814 square miles. The highest estimated population exposure is in the 0.50-0.75" hail band with 179,327 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 606 sq mi | 119,771 |
| 0.50-0.75" | 814 sq mi | 179,327 |
| 0.75-1.00" | 359 sq mi | 133,571 |
| 1.00-1.25" | 49 sq mi | 4,925 |
| 1.25-1.50" | 8 sq mi | 474 |
| 1.50-1.75" | 5 sq mi | 1,076 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the March 27, 2021 Saint Louis, MO hail event may have reached your area.
Housing Exposure Inside the Saint Louis, MO Hail Swath Map
Inside the March 27, 2021 hail swath map area for Saint Louis, MO, HailGeeks estimates 198,984 single-family homes, 12,157 townhomes, and 54,103 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the 0.50-0.75" hail band, with 81,559 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 55,571 | 2,844 | 13,612 |
| 0.50-0.75" | 81,559 | 4,496 | 22,662 |
| 0.75-1.00" | 58,907 | 4,705 | 17,132 |
| 1.00-1.25" | 2,237 | 61 | 531 |
| 1.25-1.50" | 198 | 22 | 70 |
| 1.50-1.75" | 512 | 29 | 96 |
Use this table to review housing exposure by hail band for the March 27, 2021 Saint Louis, MO hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the Saint Louis, MO Hail Map
Hail from the March 27, 2021 storm was mapped across 26 counties in the Saint Louis, MO region. St. Louis County, MO had the strongest mapped signal, peaking at 1.50" with roughly 67,878 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 Saint Louis, MO Hail Map
Zooming in, the swath touched 83 cities near Saint Louis, MO. Weldon Spring, MO had the strongest mapped signal at 1.50", with an estimated 4,668 single-family homes exposed.
City cards show where the March 27, 2021 Saint Louis, MO 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 Saint Louis, MO Hail Swath Map
At the ZIP level, the March 27, 2021 Saint Louis, MO hail map spans 105 ZIP codes. ZIP 63304 shows the strongest local signal, with mapped hail estimates up to 1.50" and an estimated single-family-home exposure of 12,517.
Check your ZIP in seconds to see whether hail activity from the March 27, 2021 Saint Louis, MO event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the March 27, 2021 hail map for Saint Louis, MO currently list 12 public hail reports, 13 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
March 27, 2021 5:05 PM CT |
1.75 in | 2 WSW Weldon Spring | MO | 1.75 INCH HAIL AT THE NWS OFFICE IN WELDON SPRING. |
March 27, 2021 5:07 PM CT |
1.00 in | Weldon Spring | MO | VIA FACEBOOK WITH MEASUREMENTS. HAIL OF VARIABLE SIZE BUT 1IN MAX. |
March 27, 2021 5:09 PM CT |
1.00 in | 3 SSW Weldon Spring | MO | No National Weather Service description provided. |
March 27, 2021 5:11 PM CT |
1.00 in | 3 S Weldon Spring | MO | REPORT FROM MPING: QUARTER (1.00 IN.). |
March 27, 2021 5:13 PM CT |
1.00 in | 2 E Harvester | MO | REPORT FROM MPING: QUARTER (1.00 IN.). |
March 27, 2021 5:17 PM CT |
1.00 in | 2 NW Maryland Heights | MO | REPORT FROM MPING: QUARTER (1.00 IN.). |
March 27, 2021 5:21 PM CT |
1.00 in | 1 ENE Maryland Heights | MO | REPORT FROM MPING: QUARTER (1.00 IN.). |
March 27, 2021 5:27 PM CT |
1.00 in | Hazelwood | MO | CORRECTS PREVIOUS HAIL REPORT FROM HAZELWOOD. |
March 27, 2021 5:29 PM CT |
1.00 in | Florissant | MO | VIA FACEBOOK REPORT WITH PICTURE. |
March 27, 2021 5:35 PM CT |
1.00 in | 1 WNW Spanish Lake | MO | No National Weather Service description provided. |
March 27, 2021 6:55 PM CT |
1.00 in | Collinsville | IL | No National Weather Service description provided. |
March 27, 2021 7:00 PM CT |
1.00 in | Maryville | IL | No National Weather Service description provided. |
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
March 27, 2021 6:45 PM CT | 1 W Kimmswick | MO | SIDING COMPLETELY RIPPED OFF THE WEST SIDE OF A HOUSE. TREES DOWNED. | |
March 27, 2021 6:55 PM CT | Collinsville | IL | TREES DOWNED ON HOUSES. | |
March 27, 2021 7:00 PM CT | 3 SE Maryville | IL | LARGE TREES DOWN AND UTILITIES DAMAGED. | |
March 27, 2021 7:00 PM CT | 2 S Troy | IL | SMALL PIECE OF SIDING RIPPED FROM HOME... FENCE BLOWN DOWN. | |
March 27, 2021 7:03 PM CT | Troy | IL | FENCE AND DECK DAMAGE TO A HOME. | |
March 27, 2021 7:05 PM CT | 2 ESE Troy | IL | DRYWALL RIPPED FROM A HOME... ROOF RIPPED ALL OFF A POLE BARN. | |
March 27, 2021 7:08 PM CT | 3 W Saint Jacob | IL | FENCE DAMAGE WITH OUTBUILDING DESTROYED. | |
March 27, 2021 7:15 PM CT | Highland | IL | HEAVY DAMAGE TO SEVERAL BUILDINGS... MULTIPLE TREES UPROOTED. | |
March 27, 2021 7:17 PM CT | 1 W Highland | IL | REPORT FROM MPING: TREES UPROOTED OR SNAPPED; ROOF BLOWN OFF. | |
March 27, 2021 7:18 PM CT | Saint Jacob | IL | FLAG POLE SNAPPED IN HALF. | |
March 27, 2021 7:37 PM CT | 4 W Beaver Creek | IL | TREES AND POWER LINES DOWN ALONG MILLERSBURG ROAD. | |
March 27, 2021 7:54 PM CT | 2 SSW Marine | IL | DOWNED TREE BRANCHES AND OTHER DEBRIS... REPORTED VIA TWITTER. | |
March 27, 2021 7:17 PM CT | 62 mph | 1 ENE Highland | IL | No National Weather Service description provided. |
| 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 March 27, 2021 Saint Louis, MO storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the Saint Louis, MO Region
We found 0 more hail maps with reports from the same Saint Louis, MO region as the March 27, 2021 event.
If none of these related Saint Louis, MO 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 Saint Louis, MO region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near Saint Louis, MO
Not sure whether the March 27, 2021 Saint Louis, MO 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 Saint Louis, MO 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 March 27, 2021 Saint Louis, MO event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the Saint Louis, MO 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 March 27, 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 March 27, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the Saint Louis, MO 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 March 27, 2021 Saint Louis, MO hail event.