Dimmit County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Dimmit County: 0.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

More event types since 1996

Costliest events since 1996

1. Nov 1, 1996Drought, Dimmit$8.0 million
   National Weather Service narrative

   Drought persisted through November across the southwestern half of South Central Texas. A heavy snow event near the end of the month again added moisture to soils across the Hill Country. Monthly damages are based on the estimated annual loss to agriculture across all of Texas through this year. Property damages do not include business or commercial revenue losses.

2. Oct 29, 1996Flood, Dimmit$5.0 million
   National Weather Service narrative

   Rainfall of up to 13 inches on the headwaters of the Nueces River on the evening of the 27th and the morning of the 28th caused the river to rise rapidly. The Nueces finally crested just south of Uvalde at around 20 feet, where flood stage is 11 feet. This was the highest reading since 1962. As it moved southward into Zavala County near 1200CST on the 28th, flow was measured at 200,000 cfs. The river crested near Crystal City at 31 feet. Many homes had to be evacuated, with damage reported to nearly 40 home and mobile homes. The flood wave moved into Dimmit County near 1200CST on the 29th. The river crested near Asherton at just over 29 feet, where flood stage is 20 feet. Damage…

3. Jul 17, 2026Flood$1.4 million
   National Weather Service narrative

   A major flood wave on the Nueces River triggered by torrential rain primarily over Uvalde County moved into Dimmit County on July 17 and caused extensive inundation of the floodplain in Dimmit County. Satellite imagery indicated the width of inundation spanned up to 2 miles in width over the lower Nueces River and along Soldier Slough. The Nueces River at Asherton remained at Major flood stage between July 17 and July 24, recording a crest of 31.56ft on July 18.||Damage to public infrastructure in Dimmit County amounted to around $1.4 million with damage primarily wrought to roadway infrastructure, water control facilities, and other utilities. Twenty-eight homes in the county…

4. Mar 18, 2016Lightning$500,000
   National Weather Service narrative

   Some oil tanks were ignited by a lightning strike in Dimmit County one mile south of the Zavala County line. Fourteen tanks were lost, and two holding tanks and their contents were saved.

5. Sep 28, 2021Lightning$250,000
   National Weather Service narrative

   Lightning started a fire at a oilfield tank battery near the intersection of Hwy 85 and FM 190 near Brundage. One of the damaged tanks released hydrogen sulfide. Hwy 85, FM 190, FM 1556, FM 65, and FM 1407 were closed and residents in the area were asked to shelter in place.

6. May 21, 2007Thunderstorm Wind$100,000
   National Weather Service narrative

   Severe thunderstorm winds blew down trees and power lines in the Carrizo Springs area. The winds also damaged roofs in the city.

7. Jul 15, 2003Tropical Storm, Dimmit$100,000
   National Weather Service narrative

   Former Hurricane Claudette, now Tropical Storm Claudette, produced winds unofficially estimated at 50 to 60 mph over Dimmit County. The winds knocked down trees and caused minor damage to homes, mainly in the southern part of the county.

8. Aug 27, 2004Thunderstorm Wind$100,000
   National Weather Service narrative

   Severe thunderstorm winds struck a ranch between Valley Wells and Catarina, just south of the Nueces River. The winds damaged a barn and blew down several trees.

9. May 4, 2001Thunderstorm Wind$35,000
   National Weather Service narrative

   Severe thunderstorm winds blew over a mobile home, as well as several trees and power lines in the Carrizo Springs area.

10. Oct 12, 2003Flash Flood$30,000
    National Weather Service narrative

    The showers and thunderstorms continued to spread to the south and east, crossing into Dimmit County just before midnight. The storms produced a general 1 to 2 inch rainfall over the county, with isolated totals in the southeast part of the county to 5 inches. Numerous roads were closed from near midnight into the early morning hours.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

114°F2 times, most recently Jun 22, 2023

All-time low

10°FDec 23, 1989

Warmest night

86°FSep 12, 1912

Coldest day

27°FJan 31, 1951

Wettest day

11.48 inOct 14, 2013

Snowiest day

3.0 inNov 24, 1957

Hottest year

1962mean 74.0°F

Coldest year

1976mean 68.1°F

Wettest year

197141.21 in

Driest year

20198.27 in

Snowiest season

3.0 in1957-58

Station Carrizo Springs 3S (USC00411486), 613 ft elevation, 3.5 miles from the population centre. Daily records from 1912 to October 22, 2026; 94.4% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00411486.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.