Preliminary NWS reports for San Antonio on March 31, 2025 via the Storm Prediction Center. NCEI check for San Antonio on Mar 31, 2025: NCEI final record: confirmed (StormEvents_details-ftp_v1.0_d2025_c20260819.csv.gz, compiled August 19, 2026). The San Antonio record that holds Mar 31, 2025 last changed October 17, 2026.
The Day In Numbers
| Reports of 1 inch or larger | 15 |
|---|---|
| Counties reporting | 2: Bexar, Medina |
| Largest stone (inches) | 2 |
| Reports 1.75 inches or larger | 7 |
For San Antonio, the Storm Prediction Center date runs from 12:00 UTC on March 31, 2025 to 12:00 UTC the next day, soSan Antonio reports timed 00:00 to 11:59 UTC happened on the evening of March 31, 2025 in Texas. For San Antonio on Mar 31, 2025, stone size is the diameter in inches as reported to the National Weather Service.
Every Report
| Time (UTC) | Size (inches) | Location | County |
|---|---|---|---|
| 22:33 | 1.75 | 5 W Government Canyon S | Medina |
| 22:45 | 1 | Sea World | Bexar |
| 22:49 | 1.5 | Leon Valley | Bexar |
| 22:50 | 1.75 | Sea World | Bexar |
| 22:52 | 1.75 | 2 S Sea World | Bexar |
| 22:52 | 1.5 | 2 SW Leon Valley | Bexar |
| 22:55 | 1.75 | 3 ESE Sea World | Bexar |
| 22:58 | 1.75 | 3 ESE Sea World | Bexar |
| 22:58 | 2 | Sea World | Bexar |
| 23:00 | 1.75 | 2 SSW Sea World | Bexar |
| 23:00 | 1 | 1 SE Sea World | Bexar |
| 23:02 | 1.5 | 2 SW Leon Valley | Bexar |
| 23:10 | 1.5 | 3 NW Lackland AFB | Bexar |
| 23:13 | 1.25 | 2 W Sea World | Bexar |
| 23:21 | 1 | 3 SW Government Canyon | Bexar |
Largest Report On March 31, 2025
The largest stone reported on March 31, 2025 was 2 inches at Sea World, Bexar County, timed 22:58 UTC.No other San Antonio report on Mar 31, 2025 matched 2 inches. The note the San Antonio area forecast office attached to it on March 31, 2025 reads: “(EWX)”
Reports By County On Mar 31, 2025
| County | Reports | Largest (inches) | Sizes in report order (inches) |
|---|---|---|---|
| Bexar | 14 | 2 | 1, 1.5, 1.75, 1.75, 1.5, 1.75, 1.75, 2, 1.75, 1, 1.5, 1.5, 1.25, 1 |
| Medina | 1 | 1.75 | 1.75 |
The 15 reports on March 31, 2025 were spread over 2 counties, and Bexar County held the largest stone at 2 inches. Bexar County logged 14 reports with a largest stone of 2 inches on March 31, 2025. Medina County logged 1 report with a largest stone of 1.75 inches on March 31, 2025.
What The Reporters Wrote
- 22:33 UTC, 5 W Government Canyon S, Medina County, 1.75 inches: Report from mPING Golf Ball (1.75 in.); (EWX)
- 22:45 UTC, Sea World, Bexar County, 1 inch: Broken window and weather station measured 75 mph; (EWX)
- 22:49 UTC, Leon Valley, Bexar County, 1.5 inches: (EWX)
- 22:50 UTC, Sea World, Bexar County, 1.75 inches: Amateur radio passed a report of golf ball size near Sea World; Time estimated from radar; (EWX)
- 22:52 UTC, 2 S Sea World, Bexar County, 1.75 inches: (EWX)
- 22:52 UTC, 2 SW Leon Valley, Bexar County, 1.5 inches: Report from mPING Ping Pong Ball (1.50 in.); (EWX)
- 22:55 UTC, 3 ESE Sea World, Bexar County, 1.75 inches: (EWX)
- 22:58 UTC, 3 ESE Sea World, Bexar County, 1.75 inches: (EWX)
- 22:58 UTC, Sea World, Bexar County, 2 inches: (EWX)
- 23:00 UTC, 2 SSW Sea World, Bexar County, 1.75 inches: (EWX)
- 23:00 UTC, 1 SE Sea World, Bexar County, 1 inch: (EWX)
- 23:02 UTC, 2 SW Leon Valley, Bexar County, 1.5 inches: Report from mPING Ping Pong Ball (1.50 in.); (EWX)
- 23:10 UTC, 3 NW Lackland AFB, Bexar County, 1.5 inches: (EWX)
- 23:13 UTC, 2 W Sea World, Bexar County, 1.25 inches: Half dollar size hail near Brennan High School; (EWX)
- 23:21 UTC, 3 SW Government Canyon, Bexar County, 1 inch: Report from mPING Quarter (1.00 in.); (EWX)
Other Hail Days Within 30 Days Of Mar 31, 2025
2 other days in the San Antonio record had hail of 1 inch or larger within 30 days of March 31, 2025. A San Antonio roof hit on March 31, 2025 and again on one of these dates can carry damage from both, which matters when a claim is filed for only one date.
- San Antonio, 8 days before Mar 31, 2025: March 23, 2025, 6 reports, largest 1 inch.
- San Antonio, 30 days after Mar 31, 2025: April 30, 2025, 4 reports, largest 3 inches.
Re-Roof Permits In The 30 Days After Mar 31, 2025
The City of San Antonio permit file lists 783 re-roof permits issued from April 1, 2025 to April 30, 2025, the 30 days after March 31, 2025. For scale, the same file averages about 413 per 30 days from November 30, 2020 to September 25, 2026, so the Mar 31, 2025 window came in above that average. The 783 City of San Antonio permits counted after March 31, 2025 include every re-roof permit in that window, not only roofs hit by hail, and a permit shows work that was filed, not that hail caused it. Dataset for the City of San Antonio count after March 31, 2025: https://data.sanantonio.gov/dataset/building-permits, City of San Antonio, Development Services Department, loaded through September 25, 2026.
Reading A Preliminary Record Against The Final One
The reports above come from the Storm Prediction Center file for San Antonio on March 31, 2025, pulled October 17, 2026. The San Antonio file for Mar 31, 2025 is preliminary: forecast offices logged its 15 reports as they arrived, and a spotter, a broadcaster or a social media post can each be the source. The NCEI Storm Events record is the reviewed version, and for San Antonio on Mar 31, 2025 it is checked against a file that reaches May 26, 2026, 421 days later. For March 31, 2025 in San Antonio the NCEI record does list hail, so a reviewed entry exists for this date. Sizes and counts for San Antonio on Mar 31, 2025 can still differ between the two records, so use the NCEI entry when the two disagree.
If Your Roof Was Under This
Compare the San Antonio report locations for March 31, 2025 with your address, then get a documented inspection before you file anything. See the San Antonio hail history for how Mar 31, 2025 compares. For a San Antonio roof after March 31, 2025, the hail claim calculator shows whether a claim nets anything after your deductible. Before you sign anything in San Antonio after Mar 31, 2025, use the check-a-roofer guide. For a San Antonio roof hit on March 31, 2025, chapter 707 bars a Texas contractor from negotiating the claim for you. After Mar 31, 2025, see the San Antonio roofing company ranking and the company directory.
Previous storm day: March 23, 2025 | Next storm day: April 30, 2025 | All San Antonio storm days | Earliest storm day: January 23, 2024 | Latest storm day: September 11, 2026
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Sources
- NOAA Storm Prediction Center, preliminary local storm reports for San Antonio on March 31, 2025, pulled October 17, 2026, preliminary and subject to review. https://www.spc.noaa.gov/climo/reports/250331_rpts.html.
- NOAA National Centers for Environmental Information, Storm Events Database bulk files, the record the San Antonio March 31, 2025 status line above checks (record reaches May 26, 2026, pulled October 17, 2026, reviewed record). https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/.
- City of San Antonio, Development Services Department, re-roof permit file, loaded through September 25, 2026, used for the 783 permits counted after March 31, 2025. https://data.sanantonio.gov/dataset/building-permits.