Hail Swath Map Preview
The San Antonio, TX hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 2.00". There are 11 public hail reports, 0 public wind reports, and 1 nearby tornado reports listed for the March 22, 2021 event.
View the March 22, 2021 San Antonio, TX 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 San Antonio, TX Hail Map
The March 22, 2021 hail swath map for San Antonio, TX covers approximately 2,290 square miles and includes an estimated 570,548 people inside the mapped footprint. The largest mapped area is in the 0.50-0.75" hail band, covering 831 square miles. The highest estimated population exposure is in the < 0.50" hail band with 255,363 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 664 sq mi | 255,363 |
| 0.50-0.75" | 831 sq mi | 236,681 |
| 0.75-1.00" | 416 sq mi | 46,492 |
| 1.00-1.25" | 232 sq mi | 16,292 |
| 1.25-1.50" | 98 sq mi | 7,407 |
| 1.50-1.75" | 37 sq mi | 5,283 |
| 1.75-2.00" | 9 sq mi | 2,464 |
| 2.00-2.25" | 3 sq mi | 566 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the March 22, 2021 San Antonio, TX hail event may have reached your area.
Housing Exposure Inside the San Antonio, TX Hail Swath Map
Inside the March 22, 2021 hail swath map area for San Antonio, TX, HailGeeks estimates 227,973 single-family homes, 6,847 townhomes, and 74,298 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the < 0.50" hail band, with 98,017 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 98,017 | 3,071 | 39,928 |
| 0.50-0.75" | 97,634 | 2,991 | 28,134 |
| 0.75-1.00" | 19,514 | 388 | 2,390 |
| 1.00-1.25" | 6,489 | 221 | 1,820 |
| 1.25-1.50" | 2,966 | 84 | 1,050 |
| 1.50-1.75" | 1,909 | 77 | 864 |
| 1.75-2.00" | 1,169 | 15 | 99 |
| 2.00-2.25" | 275 | 0 | 13 |
Use this table to review housing exposure by hail band for the March 22, 2021 San Antonio, TX hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the San Antonio, TX Hail Map
Hail from the March 22, 2021 storm was mapped across 18 counties in the San Antonio, TX region. Comal County, TX had the strongest mapped signal, peaking at 2.00" with roughly 14,172 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 San Antonio, TX Hail Map
Zooming in, the swath touched 24 cities near San Antonio, TX. Canyon Lake, TX had the strongest mapped signal at 2.00", with an estimated 10,396 single-family homes exposed.
City cards show where the March 22, 2021 San Antonio, TX 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 San Antonio, TX Hail Swath Map
At the ZIP level, the March 22, 2021 San Antonio, TX hail map spans 73 ZIP codes. ZIP 78133 shows the strongest local signal, with mapped hail estimates up to 2.00" and an estimated single-family-home exposure of 7,812.
Check your ZIP in seconds to see whether hail activity from the March 22, 2021 San Antonio, TX event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the March 22, 2021 hail map for San Antonio, TX currently list 11 public hail reports, 0 public wind reports, and 1 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
March 22, 2021 11:47 PM CT |
1.00 in | 4 NNW Kerrville | TX | PUBLIC REPORT OF QUARTER SIZED HAIL ABOUT 5 MILES NORTH OF KERRVILLE. |
March 23, 2021 12:56 AM CT |
1.75 in | 4 SSW Twin Sisters | TX | GOLF BALL SIZED HAIL CALLED IN ON THE NORTH SIDE OF SPRING BRANCH. |
March 23, 2021 1:04 AM CT |
1.00 in | 1 E Boerne | TX | No National Weather Service description provided. |
March 23, 2021 1:05 AM CT |
1.75 in | 3 NW Canyon Lake | TX | NUMEROUS REPORTS OF QUARTER TO GOLF BALL SIZED HAIL AROUND CANYON LAKE. |
March 23, 2021 1:07 AM CT |
1.00 in | 1 WSW Boerne | TX | TWO DIFFERENT SOCIAL MEDIA REPORTS OF QUARTER SIZED HAIL IN BOERNE. |
March 23, 2021 1:29 AM CT |
2.00 in | 7 NNE New Braunfels | TX | No National Weather Service description provided. |
March 23, 2021 1:30 AM CT |
1.75 in | 7 WNW Zorn | TX | NWS EMPLOYEE REPORTED GOLF BALL SIZED HAIL JUST TO THE NORTHEAST OF NEW BRAUNFELS. |
March 23, 2021 1:34 AM CT |
1.00 in | San Marcos | TX | REPORT FROM MPING NEAR TEXAS STATE UNIVERSITY. |
March 23, 2021 1:44 AM CT |
1.00 in | 4 SW Sea World | TX | REPORT RELAYED VIA THE MEDIA OF QUARTER SIZED HAIL ON THE WEST SIDE OF SAN ANTONIO. |
March 23, 2021 1:52 AM CT |
1.50 in | 2 NNW Martindale | TX | NICKEL TO PING PONG BALL SIZE HAIL IN MARTINDALE. REPORTED BY FORMER NWS EMPLOYEE. |
March 23, 2021 1:55 AM CT |
1.50 in | 2 NNW Fentress | TX | No National Weather Service description provided. |
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
| No public wind reports are available for this event. | ||||
| Date & Time | Rating | City | State | Description |
|---|---|---|---|---|
March 23, 2021 1:04 AM CT | UNK | Canyon Lake | TX | AN NWS STORM SURVEY FOUND AN EF1 TORNADO WITH ESTIMATED PEAK WINDS OF 100 MPH ON THE WESTERN SHORE OF CANYON LAKE. |
This table includes only public storm reports connected to the March 22, 2021 San Antonio, TX storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the San Antonio, TX Region
We found 0 more hail maps with reports from the same San Antonio, TX region as the March 22, 2021 event.
If none of these related San Antonio, TX 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 San Antonio, TX region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near San Antonio, TX
Not sure whether the March 22, 2021 San Antonio, TX 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 San Antonio, TX 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 22, 2021 San Antonio, TX event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the San Antonio, TX 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 22, 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 22, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the San Antonio, TX 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 22, 2021 San Antonio, TX hail event.