Flood Watch — San Jacinto + 11 more areasFlood Watch — San Jacinto + 11 more areas
Completed official-source record with preserved facts and meaningful-change history. The final record does not infer impacts the source did not report.
What the preserved official data shows
This Flood Watch left the National Weather Service active-alert feed after being preserved by Texas Disaster Watch. The official record named San Jacinto; Polk; Montgomery; Northern Liberty; Inland Harris; additional areas in official record. Completion confirms the alert is no longer in the active feed; it does not by itself establish damage or other impacts.
- Record completed
- Aug 31, 2026 · 4:26 PM CDT
- Official severity
- Severe
- Named areas
- San Jacinto; Polk; Montgomery; Northern Liberty; Inland Harris; additional areas in official record
- Official expiration
- Sep 1, 2026 · 4:00 AM CDT
- Final monitor status
- Left the active NWS alert feed
Show the Official Affected Area
The map distinguishes an official point, official warning/perimeter geometry, and optional satellite thermal detections. Aerial imagery is a basemap and may be older than the incident.
Record facts
- Event
- Flood Watch
- Affected Texas areas
- San Jacinto; Polk; Montgomery; Northern Liberty; Inland Harris; Chambers; Inland Galveston; Southern Liberty; Coastal Harris; Coastal Galveston; Galveston Island; Bolivar Peninsula
- Effective
- 2026-08-31T10:14:00-05:00
- Expires
- 2026-09-01T04:00:00-05:00
- Issuing authority
- NWS Houston/Galveston TX
Completed
Official record ended or left the source’s active window.
Instructions preserved with the record
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
Latest official-source information
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of southeast Texas, including the following
areas, Bolivar Peninsula, Chambers, Coastal Galveston, Coastal
Harris, Galveston Island, Inland Galveston, Inland Harris,
Montgomery, Northern Liberty, Polk, San Jacinto and Southern
Liberty.
* WHEN...From late tonight through Wednesday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Periods of moderate to heavy rainfall associated with Potential
Tropical Cyclone Five are expected to begin as early as late
tonight and lasting into late Tuesday night/early Wednesday
morning. 3-5 inches with isolated amounts of 6-9 inches are
expected with the highest totals occuring east of I-45. Rainfall
rates will exceed 3-4 inches per hour at times in the heaviest
downpours, which can lead to flash flooding especially in urban
and vulnerable areas.
- http://www.weather.gov/safety/flood
Meaningful official changes
The complete source history remains preserved. Routine monitoring snapshots and small gauge fluctuations are condensed here for readability.
- Record completedOfficial record ended or left the source’s active window.
1 routine source snapshots remain preserved but are not repeated on this page.
Original source
This record is derived from an official public source. Texas Hazard Watch preserves and organizes it but does not replace the issuing authority.