Houston weather: cold front brings heavy rain, flood threat Saturday with 2-4 inches expected

The National Weather Service issued a flood watch for Southeast Texas effective Friday night through Sunday morning. Forecasters project widespread rainfall totals of 2-4 inches with isolated amounts reaching 4-6 inches across the Houston area as a cold front moves through Saturday.

Friday temperatures will reach the mid-80s with breezy conditions and scattered downpours. Residents should secure outdoor items before Saturday's stronger storms arrive in the early morning hours.

The cold front will cross Texas on Saturday, producing heavy rain and storms across Southeast Texas. Meteorologists predict storms will arrive in two distinct batches with the potential for severe weather.


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First storm wave timing: early Saturday morning

The initial storm line will reach the Brazos Valley by 3 a.m. Saturday, moving eastward toward Houston by 6 a.m. Strong to severe storms with heavy rain and street flooding are likely during this first wave, which will exit the coast by 8 a.m. Houston should see mostly dry conditions by 10 a.m., with windy weather and possible isolated storms throughout the day.

Second cold front storm wave: Saturday evening

The second round of storms will accompany the cold front, arriving in the Brazos Valley between 7-8 p.m. Saturday. Houston will experience these storms between 9-11 p.m. The system will move quickly to the coast by 1 a.m. Sunday, ending the severe weather and flood threat for Southeast Texas.

Flash flooding risk elevated due to dry ground conditions

The region faces a 2 out of 4 flash flooding threat Saturday. Over a month of dry conditions means ground may not absorb heavy rainfall quickly, increasing street flooding potential in areas receiving excessive rain in short periods.

Tornado threat requires weather alert activation

A small tornado threat accompanies Saturday's storms. Residents should ensure mobile devices have weather alerts enabled and volume activated to receive warnings during overnight hours.

Burn bans continue across most counties in Southeast Texas. While Saturday's rain will provide moisture, forecasters note several weeks of consistent rain-producing fronts would be necessary before burn bans are lifted. Fire risk remains elevated.

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Residents should follow fire safety protocols:

• Never leave fires unattended
  
• Secure tow chains to prevent sparking
  
• Avoid driving or parking over tall grass
  
• Do not discard lit cigarettes on the ground
  

The season's strongest cold front will move through Tuesday, bringing temperatures in the 70s with sunny conditions. Morning lows will drop into the 50s, providing fall weather for Halloween activities across the Houston area.