Key Takeaways
- A Flood Advisory was active for parts of Harris and Montgomery County until 9:30 p.m. Sunday, with 1–2 inches of rain already recorded and another 1–2 inches expected, raising the risk of minor flooding.
- A Flood Watch remains in effect through Wednesday morning as tropical moisture collides with a stalled front, potentially producing widespread moderate to heavy rain and isolated totals of 6–8 inches.
- The forecast calls for 2–5 inches of rain through midweek, with locally higher amounts possible; street‑flooding risk is rated 2/4 for southeast Texas on Sunday and continues through Tuesday.
- A weak tropical low off the eastern Mexican coast is feeding moisture into the Gulf; while the system may re‑enter the Gulf Tuesday‑Wednesday, overall development chances remain low.
- Residents should be prepared to seek shelter quickly if lightning or thunder is observed and stay updated on evolving flood advisories and watches.
A FOX 26 Storm Alert has been issued for Monday as increasing Gulf moisture moves into Greater Houston. The alert follows a Flood Advisory that was already in place for portions of Harris and Montgomery County until 9:30 p.m. on Sunday. By 7:30 p.m. Sunday, the National Weather Service (NWS) reported that 1–2 inches of rain had fallen across the area, with another 1–2 inches anticipated overnight. Those additional amounts could produce minor flooding, especially in low‑lying streets and areas with poor drainage.
Looking ahead, a Flood Watch is active through Wednesday morning. The watch stems from the interaction of a weak tropical low and a stalled frontal boundary positioned over the region. As tropical moisture streams northward, periods of moderate to heavy rain are expected to become widespread on Monday and persist through midweek. Rainfall projections call for 2–5 inches across the broader area, with isolated pockets potentially receiving 6–8 inches if storms stall or repeatedly train over the same locations. The NWS urges residents to be ready to move indoors quickly at the first sign of lightning or thunder.
The upcoming wet pattern is being driven by a weak tropical low meandering along the coast of eastern Mexico. This system is generating disorganized showers and thunderstorms that are feeding moisture into the Gulf of Mexico. While the low may re‑emerge in the Gulf on Tuesday or Wednesday, forecasters note that overall conditions for any significant tropical development remain low at this time. Nonetheless, the deep Gulf moisture is already enhancing rain chances for Southeast Texas, including the Houston metro area.
As a result of this moisture influx, the Texas coastline—and consequently Southeast Texas—can expect an increase in rain from Sunday through at least Tuesday. Street‑flooding risk is currently rated at a 2/4 level for southeast Texas on Sunday, with the threat persisting into Tuesday. Localized downpours could produce rapid water accumulation on roadways, particularly where showers linger or repeatedly pass over the same corridors.
In summary, the Greater Houston area faces a multi‑day period of elevated rain and flood potential due to a combination of Gulf‑origin moisture, a stalled front, and a weak tropical low offshore. Residents should monitor updates from the NWS and local media, avoid driving through flooded roads, and have emergency plans ready in case conditions worsen. Staying alert to lightning and thunder and seeking shelter promptly will be key to staying safe during this wet spell.