HOUSTON -- Heavy downpours caused localized street flooding in some communities north of Houston on Wednesday, and Thursday s weather doesn t look like it will be much better.

A Flash Flood Watch is in effect until 1 p.m. Thursday for Austin, Colorado, Grimes, Harris, Liberty, Montgomery, Polk, San Jacinto, Walker, Waller, and Washington Counties.

Early in the afternoon a severe thunderstorm continued to move in a northeasterly direction, dumping rain on Montgomery, Polk, and San Jacinto Counties.

As of 1:30 p.m. the Tomball area had received more than an inch of rain. Closer to the City of Houston only a half-inch was reported, and many communities along the coast had received only sprinkles.

There could be periodic downpours heading into the evening hours, but our rain chances will decrease overnight and then return on Halloween morning, said KHOU 11 News Meteorologist Brooks Garner.

Garner said tropical moisture over southeast Texas will collide with an approaching cool front on Thursday, making for a wet forecast.

As of 4 p.m. the Willis area had about 3 inches of rain.

I've never seen the water that high here, said Montgomery County resident Gilbert Garza.

The heaviest rainfall is expected on Halloween in the morning into the early afternoon Thursday, although street flooding is possible throughout the day. The rain should start to move off the coast by around 7 p.m., so your trick-or-treat forecast will depend on what part of town you live in.

Friday the skies will clear out, leaving us with nice daytime temps in the mid-70s for the weekend. Starting Friday into Saturday, our overnight lows will be in the low-50s.

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