Grimes County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Grimes 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

The National Weather Service sets flood stages for 1 gauge here but lists no crests for it.

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. Aug 25, 2017Tropical Storm, Grimes$50.0 million
   National Weather Service narrative

   Slow moving Tropical Storm Harvey brought heavy rains and flooding to portions of Brazos, Burleson, Austin, Grimes, Washington and Madison Counties. Moderate to major lowland flooding occurred along rivers and numerous creeks and tributaries. This includes the Brazos at San Felipe, Davison Creek, etc.

2. Sep 13, 2008Tropical Storm, Grimes$12.0 million
   National Weather Service narrative

   Hurricane Ike produced tropical storm force winds in the county. Moderate wind damage with trees and limbs down. Shingle damage to roofs.

3. Sep 5, 2011Wildfire, Grimes$7.0 million
   National Weather Service narrative

   The fire was ignited during a period of high winds and dry relative humidity, and burned around 18960 acres. Twenty-three structures were damaged and 76 were destroyed.

4. Aug 1, 1998Drought, Grimes$1.0 million
   National Weather Service narrative

   Drought conditions continue from July. After months of extremely dry and hot weather across SE Texas, relief came late in the month with welcomed rainfall and slightly cooler temperatures. Over 20 people across the region lost their lives due to the extreme heat and property and crop damage averaged $8.3 million per county since May. Locations across the region were finally catching up with rainfall toward the end of the month as the drought was coming to an end. NOTE: CROP AND PROPERTY DAMAGE LISTED HERE ARE FOR THE PERIOD MAY-AUGUST 1998.

5. Apr 18, 2016Flash Flood$800,000
   National Weather Service narrative

   There were water rescues in the Todd Mission area. Major flooding occurred along County Road 311 northwest of Todd Mission with water halfway up the street signage.

6. May 26, 2016Flash Flood$500,000
   National Weather Service narrative

   Water rescues were occurring through the county. FM 362 at Beason Creek was closed due to flooding. Washington Street at Foster Street, Buckingham Lane at FM 379 and Courtney Street in the town of Navasota were all impassable and closed as they were inundated with nearly two feet of water.

7. May 26, 2016Tornado$200,000
   National Weather Service narrative

   Large damage path extended from a large commercial metal building across a ranchers property and on east into a wooded area. The large metal building and a house of the property were destroyed. Around this area and in wooded area numerous large trees were uprooted and snapped. Worst of the damage was consistent with EF2 rating.

8. Nov 17, 2015Tornado$200,000
   National Weather Service narrative

   This EF-1 tornado produced a damage path that started three miles west of Carlos near Route 30 with damage to trees and structures along Ada Oaks Lane. The path continued to the north northeast crossing County Road 173 then ran more parallel to County Road 244, crossing County Road 244 twice along its over 9 mile path. Damage was intermittent with numerous large trees uprooted or with their trunks snapped. Two trailers were thrown and destroyed. Numerous barns, farm outbuildings and mobile homes suffered severe damage. In numerous cases, tin and lumber debris were thrown over half a mile.

9. Feb 15, 2012Flash Flood$150,000
   National Weather Service narrative

   A band of moderate to heavy rainfall caused flooding in and around Grimes and Huntsville. Numerous road closures and stalled cars were reported in the town of Navasota with additional closures in and around the communities of Anderson and Huntsville.

10. Nov 5, 2000Thunderstorm Wind$100,000
    National Weather Service narrative

    Numerous trees down at CR 166 and CR 190 5 miles northeast of Anderson and along SH 6 just north of Navasota. Numerous power lines down across county.

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

112°F3 times, most recently Aug 27, 2023

All-time low

2°FDec 23, 1989

Warmest night

84°F2 times, most recently Aug 22, 2023

Coldest day

19°FJan 10, 1962

Wettest day

13.39 inOct 16, 1994

Snowiest day

3.0 inJan 10, 1973

Hottest year

2023mean 73.0°F

Coldest year

1979mean 65.3°F

Wettest year

196861.04 in

Driest year

198817.80 in

Snowiest season

8.0 in1972-73

Station College Station Easterwood Field (USW00003904), 315 ft elevation, 23.6 miles from the population centre. Daily records from 1951 to October 25, 2026; 99.8% 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 USW00003904.
• 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.