The National Weather Service office in Fort Worth, Texas has issued a Flash Flood Warning covering Grayson County in north Texas and Bryan County in southern Oklahoma. The warning was issued at 6:27 PM CDT on September 20 and remains in effect until 8:00 PM CDT.
A Flash Flood Warning means flooding is already occurring or is imminent in the warned area – this is a step above a watch, which only means conditions are favorable. Heavy rainfall from thunderstorms moving across the Red River region is producing runoff that can quickly overwhelm creeks, low-water crossings, and drainage systems in these two counties, which sit along the Texas-Oklahoma border near Sherman and Durant.
What You Might Notice
Residents in the warned area may see rapidly rising water on roads, especially at low-water crossings and underpasses, water flowing out of creek banks, and ponding in yards or streets after intense downpours. Rural roads in both counties are particularly prone to washing out or becoming impassable during events like this.
What to do right now: If you are in Grayson or Bryan County, avoid driving through flooded roadways – most flash flood deaths happen in vehicles, and it takes as little as six inches of moving water to knock a person down and two feet to carry away most cars. Turn around, don’t drown. If you live near a creek or in a low-lying area, be ready to move to higher ground quickly, and keep your phone charged with wireless emergency alerts enabled.
What to watch: Monitor local NWS updates through 8:00 PM CDT, as the warning could be extended if heavy rain persists. Check on neighbors or family in flood-prone spots, and keep children and pets away from fast-moving water, including ditches and storm drains.
This information comes from the National Weather Service (NWS) Fort Worth office.
Frequently Asked Questions
Is flash flooding actually happening, or is this just a possibility?
A Flash Flood Warning (not a watch) means flooding is occurring or imminent in Grayson County, TX and Bryan County, OK right now, based on radar and reports received by NWS Fort Worth.
What should I do right now if I'm in the warned area?
Stay off flooded roads – never drive through water covering the pavement – and move to higher ground if you're near a creek or low-lying area. Keep your phone on for emergency alerts until the warning expires at 8:00 PM CDT.
How long will this warning last?
The warning is currently set to expire at 8:00 PM CDT on September 20, but NWS Fort Worth can extend it or issue new warnings if heavy rainfall continues over the area.
Is it safe to drive home across the Texas-Oklahoma border area tonight?
Avoid travel in the warned counties if possible until the warning expires; low-water crossings and rural roads along the Red River region flood quickly and are especially dangerous after dark when water depth is hard to judge.
Keep tracking this:
Source: National Weather Service (NWS)
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Sky & Solar Conditions at the Time
Moon: Waxing Gibbous (70% illuminated), in Capricorn.
Notable planetary angles: Mercury sextile Jupiter (59°), Sun sextile Mars (62°).
Concurrent space weather: planetary Kp index 0.3; strongest recent solar flare: nothing notable.
This is a factual snapshot, not a claim of cause and effect – researchers are divided on whether lunar, planetary or solar factors influence seismic or weather activity. It’s included so readers can track the pattern for themselves over time.
