Frio County, Texas

What hazards hit Frio County most?

The most frequent records are hail reports: 104 since 1959. 62% of its hail reports since 1959 fell in April and May. The rank column places the county among Texas's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has Frio County had?

NOAA records 16 tornadoes in Frio County from 1968 to 2023, the strongest rated F4, with 5 deaths and 14 injuries recorded in the county. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 15 tornadoes whose track touched Frio County since 1950 (NOAA's county records number 16: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 5 people.

Map of the strongest tornado tracks in Texas.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in Frio County?

The most recent record with damage, injuries or deaths is the May 15, 2023 tornado ($97,000 in damage in 2025 dollars).

An NWS Storm Survey found that an EF-0 tornado initially touched down on the west side of Dilley where damage to hardwood trees was noted. The tornado then moved in a northeasterly direction, causing damage to roofs of buildings on either side of I-35. The tornado lifted on the east side of the interstate and covered approximately 0.7 miles over a span of 2 minutes. Maximum winds were estimated at 75 mph.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1101665)

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for Frio County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Drought in the 2010s: 27 records against 9 in the decade before, 27 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Frio County days with a record above.

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

62% of its hail reports since 1959 fell in April and May. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Frio County

FEMA's register lists 19 declarations that include Frio County: 12 major disasters, 7 emergencies and 0 fire management assistance declarations. Most were for hurricane (4) and flood (3).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has Frio County had?

NOAA's Storm Events Database holds 78 flood or flash flood records for Frio County from 1996 to 2017, on 70 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Frio County ranks 2523rd of 2,942 U.S. counties.

The National Flood Insurance Program has paid $57,000 on 6 claims filed in Frio County; the most in one year was 3 in 2002. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

FEMA's modeled risk for Frio County

FEMA's National Risk Index rates Frio County Relatively Low overall, with an expected annual loss of $10.7 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Frio County

1. Uvalde County 573
2. Medina County 538
3. Atascosa County 386
4. La Salle County 370
5. Frio County 348
6. Zavala County 287
7. Dimmit County 255

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in TexasEvery Texas tornado since 1950 and the counties with the most per square mile
• Hail in TexasThe state's hail reports, by county, year and month
• The Texas recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Frio CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Frio County's FEMA declarations (CSV)19 rows: every declaration that named the county, for your own analysis