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5-day forecast / Richardson, TX

WednesdayMostly Cloudy then Slight Chance Showers And Thunderstorms95° / 75° 24%
ThursdayShowers And Thunderstorms83° / 72° 95%
FridayShowers And Thunderstorms81° / 68° 82%
SaturdayShowers And Thunderstorms Likely79° / 67° 67%
SundayChance Rain Showers79° / 64° 39%

Flood watch covers Richardson; city lists round-the-clock storm help

Richardson weather, updated every four hours — local forecasts you can trust.

Dallas and Collin counties are included from Wednesday afternoon until Friday morning. Residents can review city contacts and alert registration before conditions change.

Richardson Newsroom

September 30, 20262 min read

NOAA GOES-19 satellite imagery of Texas and the Southern Plains at 10:36 p.m. CDT Tuesday, Sept. 29, 2026 (03:36 UTC Sept. 30). Credit: NOAA/NESDIS Center for Satellite Applications and Research (STAR). Satellite cloud imagery, not a depiction of observed flooding.

Richardson residents preparing for heavy rain have a city response line available around the clock for water emergencies and general storm assistance: 972-744-4111.

The city's severe-weather resource page lists the number alongside emergency-notification registration and utility contacts. Those existing resources are useful ahead of a National Weather Service flood watch that includes both Dallas and Collin counties.

The watch begins at 4 p.m. Wednesday, Sept. 30, and continues through 7 a.m. Friday, Oct. 2. All times are Central Daylight Time. The Fort Worth forecast office extended the watch in its 2:15 p.m. Sept. 29 update.

Forecasters expect widespread rainfall of 2 to 4 inches across the watch area, with localized totals of 4 to 6 inches from slow-moving showers and storms. Runoff could flood creeks, streams and low-lying ground, including low-water crossings. The regional alert does not establish flooding on any specific Richardson road.

Residents can find registration for the Richardson Emergency Notification System through the city's severe-weather page. The same page separates city assistance from electric-outage reporting, which goes to Oncor. Keeping the relevant contacts available before a storm can help direct a report to the agency or provider that handles it.

Call 911 for a life-threatening emergency. For travel, check current notices and avoid water-covered roads. The watch is advance notice of possible flooding, with more specific warnings possible later; it is not a report of an evacuation or a utility outage.

Sources

National Weather Service flood-watch update, Sept. 29 at 2:15 p.m. CDT: https://forecast.weather.gov/showsigwx.php?firewxzone=TXZ103&lat=33.0292&local_place1=Flower+Mound+TX&lon=-97.0687&product1=Flood+Watch&warncounty=TXC121&warnzone=TXZ103

City of Richardson severe-weather contacts and alert registration: https://www.cor.net/departments/communications/severe-weather

City of Richardson emergency-management contact guidance: https://www.cor.net/departments/emergency-management/contact-us

Satellite image: NOAA GOES-19, Southern Plains, 10:36 p.m. CDT Sept. 29, 2026 (03:36 UTC Sept. 30). Credit: NOAA/NESDIS Center for Satellite Applications and Research (STAR). Cloud imagery provides regional context and does not confirm local flooding. Original: https://cdn.star.nesdis.noaa.gov/GOES19/ABI/SECTOR/sp/GEOCOLOR/20262730336_GOES19-ABI-sp-GEOCOLOR-1200x1200.jpg

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Richardson Newsroom

Reporting from Richardson and the surrounding area.

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