Severe Weather History


Hazard archive · 1950 — present

Flash Flood in Llano County, Texas

82

Recorded events

2

Direct deaths

20

Direct injuries

$26.6M

Property damage

Flash Flood in Llano County, Texas: 82 recorded events between 1996 and 2025. The strongest on record measured 0. That places the county #258 nationally and #51 statewide for this hazard.

Decade by decade

Flash Flood in Llano County, Texas: events per decade

Flash Flood in Llano County, Texas: recorded events per decade
Flash Flood in Llano County, Texas: recorded events per decade

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for flash flood in Llano County is the 2000s, when 39 of the county's 82 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Llano County archive, flash flood makes up 21.4% of all recorded severe weather across 6 hazard types. Nationally the county sits at #258 for this hazard and #51 within Texas, putting it in the 91.5 percentile of all U.S. counties.

Seasonality

Events by month

2Jan
2Feb
8Mar
5Apr
13May
9Jun
16Jul
4Aug
6Sep
13Oct
4Nov
0Dec

Jul is the peak month for flash flood in Llano County with 16 recorded events, while Dec is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

Significant events

Deadliest on record

DateLocationScaleDeathsInjuriesDamage
Nov 15, 2001COUNTYWIDE0120$100K
Oct 16, 2018LLANO010$1.0M
Source: NOAA/NCEI Storm Events · dates UTC

Most recent

Latest recorded events

DateLocationMagnitudeDamage
Jul 14, 2025OXFORD0$0
Jul 4, 2025KINGSLAND0$0
Jul 4, 2025LLANO0$0
Jul 4, 2025CASTELL0$0
Jul 4, 2025CASTELL0$0
Jun 12, 2025OXFORD0$0
Sep 4, 2024GRANITE SHOALS LAKE0$0
Sep 4, 2024LLANO0$0
Oct 16, 2018KINGSLAND0$20.0M
Oct 16, 2018VALLEY SPGS0$0
Source: NOAA/NCEI Storm Events · dates UTC · recent entries may be preliminary

Other hazards here

More from Llano County

County overview →

From the record

What the reports say

Written by National Weather Service staff at the time of the event · public domain

Quick answers

Frequently asked

How many flash flood events are on record in Llano County, Texas?

82 flash flood events are recorded in Llano County between 1996 and 2025, causing 2 direct deaths.

What is the strongest flash flood recorded in Llano County?

The strongest flash flood on record in Llano County measured 0.

Where does the flash flood data for Llano County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.

Cite this page

“Flash Flood in Llano County, Texas.” Severe Weather History. severeweatherhistory.com/county/texas/llano-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.


Historical reference only — for official alerts visit weather.gov