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Flood in Grayson County, Texas
118 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 118 flood events in Grayson County, Texas, between 1950 and 2026, spread over 26 years.
May is the busiest month, with 26 of the recorded events. The last 20 years account for 89 events against 29 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.7% of the 15,832 flood events recorded in Texas; its 12.6 per 100 square miles compares with 6.1 statewide.
NCEI attributes 5 deaths in the county to floods and flash floods.
Compared with Texas
| Measure | Grayson County | Texas | US |
|---|---|---|---|
| Flood events since 1950 | 118 | 15,832 | 183,559 |
| Per 100 square miles | 12.6 | 6.1 | 5.2 |
| Per 10,000 residents | 8.5 | 5.4 | 5.5 |
| Deaths recorded | 5 | 595 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
2Feb
1Mar
12Apr
20May
26Jun
17Jul
11Aug
7Sep
8Oct
3Nov
7Dec
4
Recorded events
All 118 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 14 Feb 2026 | Flash Flood | — | — | — | — | — | County |
| 30 Aug 2025 | Flood | — | $1K | — | — | — | County |
| 30 Apr 2025 | Flash Flood | — | — | — | — | — | County |
| 24 Dec 2024 | Flood | — | $50K | — | 2 | — | County |
| 23 Jul 2024 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jul 2024 | Flash Flood | — | $2K | — | — | — | County |
| 5 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 25 May 2024 | Flash Flood | — | — | — | — | — | County |
| 23 May 2024 | Flash Flood | — | — | — | — | — | County |
| 22 May 2024 | Flash Flood | — | — | — | — | — | County |
| 12 May 2024 | Flash Flood | — | — | — | — | — | County |
| 12 May 2024 | Flash Flood | — | $18K | — | — | — | County |
| 9 May 2024 | Flash Flood | — | — | — | — | — | County |
| 21 Sep 2023 | Flash Flood | — | $100K | — | — | — | County |
| 15 Jun 2023 | Flash Flood | — | — | — | — | — | County |
| 9 Mar 2023 | Flash Flood | — | $100K | — | — | — | County |
| 9 Mar 2023 | Flash Flood | — | — | — | — | — | County |
| 9 Mar 2023 | Flash Flood | — | — | — | — | — | County |
| 9 Mar 2023 | Flood | — | $50K | — | — | — | County |
| 9 Mar 2023 | Flash Flood | — | $10K | — | — | — | County |
| 9 Mar 2023 | Flash Flood | — | — | — | — | — | County |
| 9 Mar 2023 | Flood | — | $50K | — | — | — | County |
| 24 Apr 2022 | Flood | — | $100K | — | — | — | County |
| 24 Apr 2022 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2022 | Flash Flood | — | — | — | — | — | County |
| 25 May 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2020 | Flood | — | — | — | — | — | County |
| 20 Sep 2019 | Flood | — | — | — | — | — | County |
| 20 Sep 2019 | Flood | — | — | — | — | — | County |
| 22 Sep 2018 | Flash Flood | — | $10K | — | — | — | County |
| 17 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 17 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2017 | Flash Flood | — | $100K | — | — | — | County |
| 17 Apr 2017 | Flood | — | — | — | — | — | County |
| 9 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 9 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2016 | Flood | — | — | — | — | — | County |
| 2 Jun 2016 | Flood | — | — | — | — | — | County |
| 27 Dec 2015 | Flood | — | $50K | — | — | — | County |
| 28 Nov 2015 | Flood | — | $20K | — | — | — | County |
| 27 Nov 2015 | Flood | — | $20K | — | — | — | County |
| 5 Nov 2015 | Flash Flood | — | — | — | — | — | County |
| 21 Jun 2015 | Flash Flood | — | $2K | — | — | — | County |
| 21 Jun 2015 | Flash Flood | — | $2K | — | — | — | County |
| 21 Jun 2015 | Flash Flood | — | $2K | — | — | — | County |
| 21 Jun 2015 | Flash Flood | — | $2K | — | — | — | County |
| 24 May 2015 | Flash Flood | — | — | — | — | — | County |
| 20 May 2015 | Flood | — | — | — | — | — | County |
| 20 May 2015 | Flash Flood | — | — | — | — | — | County |
| 10 May 2015 | Flash Flood | — | — | — | — | — | County |
| 10 May 2015 | Flood | — | — | — | — | — | County |
| 10 May 2015 | Flash Flood | — | — | — | — | — | County |
| 9 May 2015 | Flash Flood | — | — | — | — | — | County |
| 9 May 2015 | Flash Flood | — | — | — | — | — | County |
| 9 May 2015 | Flash Flood | — | — | — | — | — | County |
| 9 May 2015 | Flash Flood | — | — | — | — | — | County |
| 8 May 2015 | Flood | — | — | — | — | — | County |
| 7 May 2015 | Flash Flood | — | $10K | — | — | — | County |
| 7 May 2015 | Flash Flood | — | — | — | — | — | County |
| 7 May 2015 | Flash Flood | — | $5K | — | — | — | County |
| 24 Apr 2015 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2015 | Flash Flood | — | $2K | — | — | — | County |
| 24 Apr 2015 | Flash Flood | — | $5K | — | — | — | County |
| 13 Apr 2015 | Flash Flood | — | $1K | — | — | — | County |
| 31 Jul 2014 | Flash Flood | — | $10K | — | — | — | County |
| 31 Jul 2014 | Flood | — | — | — | — | — | County |
| 8 Sep 2010 | Flash Flood | — | $750K | — | — | — | County |
| 21 Oct 2009 | Flash Flood | — | $8K | — | — | — | County |
| 21 Oct 2009 | Flash Flood | — | $5K | — | — | — | County |
| 8 May 2009 | Flash Flood | — | $25K | — | — | — | County |
| 29 Apr 2009 | Flash Flood | — | $50K | — | 1 | 1 | County |
| 29 Apr 2009 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2009 | Flood | — | $2.0M | $250K | — | — | County |
| 29 Apr 2009 | Flash Flood | — | — | — | — | — | County |
| 27 May 2008 | Flash Flood | — | — | — | — | — | County |
| 11 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | $200K | — | — | — | County |
| 27 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 20 Jun 2007 | Flash Flood | — | $320K | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | $20M | — | 2 | — | County |
| 30 May 2007 | Flash Flood | — | $5K | — | — | — | County |
| 24 Apr 2007 | Flash Flood | — | — | — | — | — | County |
| 30 Mar 2006 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2006 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2006 | Flash Flood | — | $20K | — | — | — | County |
| 3 Jan 2005 | Flash Flood | — | $100K | — | — | — | County |
| 7 Apr 2002 | Flash Flood | — | — | — | — | — | County |
| 7 Apr 2002 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Sep 2001 | Flash Flood | — | — | — | — | — | County |
| 4 Sep 2001 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 31 May 2001 | Flash Flood | — | — | — | — | — | County |
| 31 May 2001 | Flash Flood | — | — | — | — | — | County |
| 24 Mar 2001 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 11 Apr 2000 | Flash Flood | — | — | — | — | — | County |
| 11 Apr 2000 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 1999 | Flash Flood | — | — | — | — | — | County |
| 3 Oct 1998 | Flash Flood | — | — | — | — | — | County |
| 4 Jan 1998 | Flash Flood | — | — | — | — | — | County |
| 20 Dec 1997 | Flash Flood | — | — | — | — | — | County |
| 20 Dec 1997 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 24 Nov 1996 | Flash Flood | — | — | — | — | — | County |
| 7 Nov 1996 | Flash Flood | — | — | — | — | — | County |
| 7 Nov 1996 | Flash Flood | — | — | — | — | — | County |
| 6 Nov 1996 | Flash Flood | — | — | — | — | — | County |
| 27 Jul 1996 | Flash Flood | — | — | — | — | — | County |
| 22 Apr 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Grayson County had?
118 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Grayson County?
14 Feb 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Grayson County?
The flash flood of 18 Jun 2007, with property damage estimated by NCEI at $20M; 2 deaths recorded.
How does Grayson County compare with Texas for flood?
12.6 events per 100 square miles against 6.1 statewide; the county holds 118 of the state's 15,832 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.