Flood Warning Issued for Fannin and Eastern Grayson Counties, TX

Source: NOAA · Fannin and Grayson Counties, Texas

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A Flood Warning is in effect until 5 PM CDT for Fannin and eastern Grayson counties due to ongoing urban and small stream flooding from excessive rainfall.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on June 11, 2026 and geographically references Fannin and Grayson Counties, Texas. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

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Alert Details

Flood Warning issued by NWS Fort Worth TX. Effective from May 27, 2026 at 2:05 PM CDT until May 27, 2026 at 5:00 PM CDT.

Affected Areas

Fannin and eastern Grayson counties in Texas. Some locations that will experience flooding include Sherman, Bonham, Denison, Van Alstyne, Howe, Pottsboro, Leonard, Honey Grove, Whitewright, Gunter, Bells, Tom Bean, Savoy, Ector, Trenton, Dodd City, Knollwood, Ravenna, Dorchester and Valley Lake.

What You Should Do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay away or be swept away. River banks and culverts can become unstable and unsafe.

Expected Conditions

Urban area and small stream flooding caused by excessive rainfall. Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is ongoing.

Timeline

The warning is in effect until 5:00 PM CDT on May 27, 2026. Emergency management reported flooding continuing within the warned area. It will take several hours for all the water from these storms to work through drainage systems.

Original source: NOAA Official Notice ↗

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Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
A Flood Warning is in effect until 5 PM CDT for Fannin and eastern Grayson counties due to ongoing urban and small stream flooding from excessive rainfall.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Fannin and Grayson Counties, Texas. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.