Updated Tuesday night, Sept. 29: The National Weather Service has extended the flood watch through Friday morning. The watch begins Wednesday afternoon.
Frisco residents have a Wednesday-afternoon deadline to prepare for a stretch of potentially heavy rain: a National Weather Service flood watch begins at 4 p.m. Sept. 30 and continues until 7 a.m. Friday, Oct. 2. All times are Central Daylight Time.
The Fort Worth forecast office's update, issued at 2:15 p.m. Tuesday, Sept. 29, includes both Collin and Denton counties and names Frisco among the affected cities. Forecasters expect slow-moving showers and thunderstorms to produce 2 to 4 inches of rain across the watch area, with localized totals of 4 to 6 inches. Those are regional projections, not a rainfall total promised for every Frisco neighborhood.
A flood watch means conditions could produce flooding. It does not announce that flooding is already happening. The weather service urges residents to follow subsequent forecasts and be ready to act if warnings are issued.
The concern is runoff. Creeks, streams and other low-lying areas could flood, and water could cover low-water crossings. Drivers should leave themselves an alternative route rather than attempt to cross a flooded road. Frisco's own flood-safety guidance says to turn around when a road is under water and to avoid walking through flooded areas.
For local updates, the city offers CodeRED notifications by phone, email and text. Residents can find enrollment information on Frisco's Emergency Preparedness page. The system also carries city-service notices, including road closures, making it useful alongside National Weather Service forecasts as conditions change.
The watch covers a much larger part of North Central Texas, including Dallas, Tarrant and Grayson counties. Travelers should check conditions at their destination as well as at home. The watch itself does not identify a closed Frisco road or establish that any particular neighborhood will flood.
