Conroe

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
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.

Flood insurance figures are for Montgomery County, the county that contains Conroe.

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 in Montgomery County, the county that contains Conroe.

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.

The drought index is for Montgomery County, the county that contains Conroe.

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.

More event types since 1996

Costliest events since 1996

1. Aug 27, 2017Flash Flood$7.0 billion
   National Weather Service narrative

   Tropical Storm Harvey brought heavy rains and catastrophic flooding to portions of Montgomery County. There were 5 storm related fatalities, 3 direct. Major record flooding occurred along the San Jacinto River and tributaries. Water was reported over sections of I-45 northbound where TXDOT reported flooding at the FM 1097 intersection. Water was reported over sections of I-45 northbound where TXDOT reported flooding at the FM 1097 intersection. Record pool levels on Lake Conroe required downstream releases that flooded numerous downstream homes, businesses and vehicles. Major flooding occurred along the San Jacinto River and the east Fork of the San Jacinto and its tributaries…

2. Sep 12, 2008Hurricane (Typhoon), Montgomery$500 million
   National Weather Service narrative

   Ike produced high winds and hurricane force wind gusts over Montgomery County. There were two indirect fatalities related to cutting trees and limbs. One was preparing for the storm, another after the storm.

3. Sep 19, 2019Flash Flood$190 million
   National Weather Service narrative

   Flooding was reported in the Woodbranch and New Caney areas. FM 1485 was closed near the East Fork of the San Jacinto River due flooding inundation. Highway 59 in New Caney became impassable due to floodwaters.

4. Jun 5, 2001Tropical Storm, Montgomery$20.1 million
   National Weather Service narrative

   Tropical Storm Allison formed in the northwest Gulf of Mexico during the early afternoon of June 5th, 80 miles south of Galveston. Allison moved northward, making landfall on the west end of Galveston Island between midnight and 1am on the 6th, less than 12 hours after forming. As Allison moved inland it caused two to three foot tides, which had little impact on the area. On the evening of the 5th a tornado briefly touched down in Brazoria county causing damage to one home in the Manvel area. Over the next five days Allison produced record rainfall that led to devastating flooding across Southeast Texas, killing 22 people and damaging over 48,000 homes, 70,000 automobiles and…

5. May 2, 2000Hail$10.0 million
   National Weather Service narrative

   Quarter to baseball sized hail in the Conroe area. Roof damage at a department store on I-45 with extensive damage to over 1000 automobiles at several dealerships. Damage to a furniture store and church with widespread damage in residential areas to carports and automobiles. At least 28 windows smashed at a fire station in Conroe with at least 75 patrol cars severely damaged.

6. May 1, 2024Flood$6.4 million
   National Weather Service narrative

   Flooding from numerous heavy rain events in April and early May led to significant damage.

7. Apr 18, 2016Flash Flood$3.0 million
   National Weather Service narrative

   FM 1774 was flooded just west of Magnolia near the Montgomery and Waller County line.

8. Sep 23, 2005Hurricane (Typhoon), Montgomery$2.5 million
   National Weather Service narrative

   The eye of Hurricane Rita moved ashore in extreme southwest Louisiana between Sabine Pass and Johnson's Bayou In Cameron Parish with a minimum central pressure of 937 mb and maximum sustained winds of 120 mph. Rita was a Category 3 hurricane at landfall.Two and a half weeks after Hurricane Katrina made her final and devastating landfall along the northern Gulf coast, all eyes turned to Tropical Storm Rita as she moved westward through the central Bahamas. On Tuesday, September 20th, Rita rapidly intensified while moving west through the Florida Straits into the Gulf of Mexico. Rita reached Category 2 intensity as the center passed about 50 miles south of Key West and significantly…

9. Jul 12, 2012Flood$2.0 million
   National Weather Service narrative

   Water was reported in 71 homes in Harris County and 234 homes in Montgomery County. Spring, Willow and Little Cypress Creek watersheds were flooded.

10. Aug 1, 1998Drought, Montgomery$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.

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

109°F2 times, most recently Sep 4, 2000

All-time low

3°FDec 22, 1989

Warmest night

89°FAug 29, 1982

Coldest day

20°FDec 22, 1989

Wettest day

14.35 inOct 16, 1994

Snowiest day

7.5 inDec 21, 1929

Hottest year

2023mean 72.3°F

Coldest year

1979mean 63.9°F

Wettest year

197978.08 in

Driest year

198821.78 in

Station Conroe (USC00411956), 245 ft elevation, 0.1 miles from the city centre. Daily records from 1897 to October 26, 2026; 96.3% 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.

Declarations for Montgomery County.

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.

• 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 USC00411956.
• 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.