Flash flood watch issued for several southeast Texas counties


HOUSTON – Forecasters warned of heavy rain and a flash flood watch in the Houston region on Monday.

A flash flood watch has been issued for Chambers, Matagorda, Brazoria and Galveston counties until 12 p.m. Tuesday.

A flash flood watch has been issued for San Jacinto, Polk, Montgomery, Liberty, Harris, Fort Bend, and Brazoria counties until 7 p.m. Monday.

Flash flood watch in effect

Meteorologist Britta Merwin said to expect thunderstorms to become more widespread after 7 a.m., with periods of heavy rain that could produce flash flooding and street flooding.

"It is important to check current weather and road conditions before traveling today," Merwin said. 
"Although quick rises are possible, local bayous are expected to stay in bank."

Thunderstorms are expected to end by the evening, Merwin said.  

According to a tweet from the Houston Office of Emergency Management, the city's Emergency Operations Center was activated at midnight. They encouraged drivers to check road conditions before traveling and watch for high water in flood-prone areas.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

The official statement from the National Weather Service follows:

The National Weather Service in Houston/Galveston has issued a

* Flash Flood Watch for a portion of southeast Texas...including
  the following counties...Brazoria Islands...Chambers...Coastal
  Brazoria...Coastal Galveston...Coastal Harris...Coastal
  Matagorda...Fort Bend...Galveston Island and Bolivar
  Peninsula...Inland Brazoria...Inland Galveston...Inland
  Harris...Inland Matagorda...Matagorda Islands...Montgomery...
  Northern Liberty...Polk...San Jacinto and Southern Liberty.

* From midnight CDT tonight through Monday evening

* Slow moving thunderstorms are expected to develop over the watch
  area producing periods of heavy rainfall. Deep tropical moisture
  will spread over the region tonight and Monday fueling the
  development of storms beginning around midnight. These storms
  will be capable of 2 to 3 inch per hour rainfall rates given the
  moist environment and slow movement. Rainfall totals of 1 to 3
  inches can be expected with isolated totals of 5 to 6 inches.
  Some areas that received moderate to heavy rainfall today will
  be more prone to runoff and street flooding. The storms should
  weaken by late Labor Day afternoon.

* Primary impacts will likely be street flooding and low water
  crossings. Minor flooding is possible of streams and bayous in
  the area though any flooding would likely be limited to just the
  smaller watersheds.

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