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5-day forecast / Denison, TX

ThursdaySlight Chance Showers And Thunderstorms80° / 69° 18%
FridayShowers And Thunderstorms73° / 66° 84%
SaturdayShowers And Thunderstorms Likely76° / 65° 70%
SundaySlight Chance Rain Showers80° / 62° 23%
MondaySunny81° / 58° 3%

Denison Under Flood Watch as Humidity and Rain Intensify - Sep 30, 2 PM

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

A severe Flood Watch is in effect for Deniston through October 2. Highs near 93F today give way to significant rainfall and cooler temperatures tomorrow.

Briar Iverson

September 30, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Sep 30, 2 PM local time.*

Current Conditions and Alert Overview

Denison, TX is currently under an active NWS Flood Watch with severe severity, which remains in effect until October 2 at 7:00AM CDT. This alert signals a heightened risk for flooding as atmospheric conditions shift from oppressive heat to heavy precipitation.

Right now, the air temperature stands at 88F, but the heat index makes it feel like 93F. The atmosphere is quite humid, with a dew point of 70F and relative humidity at 55%. Winds are blowing from the south at 16 mph, with gusts reaching up to 23 mph. The sky remains mostly cloudy as the region prepares for a significant weather transition.

Today and Tonight Forecast

Today, high temperatures will reach near 93F, with heat index values climbing as high as 97F. Rainfall is expected to begin early, with isolated showers possible before 4pm, followed by scattered showers and thunderstorms later in the day. The chance of precipitation is 40%, with new rainfall amounts between a quarter and half of an inch possible.

Tonight, conditions will remain wet with a low near 72F. Temperatures may rise slightly to around 74F overnight. Scattered showers and thunderstorms are likely before 10pm, followed by continued showers and thunderstorms.

The chance of precipitation jumps to 90%, with new rainfall amounts between 1 and 2 inches possible. Winds will remain from the south at 10 to 15 mph, with gusts as high as 25 mph.

Tomorrow Outlook

Tomorrow brings a notable cooldown and persistent rain. Highs will drop to near 78F, with temperatures falling further to around 76F in the afternoon. The sky will be cloudy with a high chance of precipitation at 90%.

Showers and thunderstorms are expected throughout the day, bringing new rainfall amounts between 1 and 2 inches. Winds will shift to south southeast at around 10 mph, with gusts up to 20 mph.

Safety Reminder

With the active Flood Watch and significant rainfall totals expected, residents should monitor local conditions closely. Avoid driving through flooded roadways and stay informed about potential flash flooding risks in low-lying areas.

National Weather Service radar for North Texas (KFWS)

Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data

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Briar Iverson

Briar Iverson covers weather, storms, and seasonal life around Denison.

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