Center of Imelda Drifting Over SW Montgomery County as of Late Morning Wednesday

The National Weather Service has issued an urban and small stream advisory for the northern Lake Houston Area. It extends across north Houston up to Conroe. Expect street flooding.

According to Harris County meteorologist Jeff Lindner, the center of Imelda is drifting over southwest Montgomery County as of late Wednesday morning. Lindner adds that “lull” in heavy rainfall over Harris County should last until early afternoon. Expect rain to pick up significantly between mid afternoon and evening.

Flash Flooding Possible

The National Weather Service cautions that heavy downpours with rainfall rates between 2-4 inches per hour are possible. That’s enough to cause street flooding.

The National Weather Service in League City has issued a

* Urban and Small Stream Flood Advisory for...
  Southwestern San Jacinto County in southeastern Texas...
  Southeastern Montgomery County in southeastern Texas...
  West central Liberty County in southeastern Texas...
  Northeastern Harris County in southeastern Texas...

* Until 1245 PM CDT.

* At 949 AM CDT, Doppler radar indicated heavy rain that will cause
  urban and small stream flooding in the advisory area. 3 to 6
  inches of rain have already fallen across portions of these areas
  and additional rain is expected during the next several hours.

* Some locations that will experience flooding include...
  Conroe, Humble, Jersey Village, Willis, Aldine, Northside /
  Northline, Kingwood, The Woodlands, Greater Greenspoint, Spring,
  Spring Branch North, northeastern Addicks Park Ten, Oak Ridge
  North, Panorama Village, Shenandoah, Splendora, Patton Village,
  Roman Forest, Woodbranch and Cut And Shoot.

Incredible Rainfall Rates South of Houston

Incredible rainfall rates of 3-4 inches per hour have resulted in a 24 hour storm total of 21.34 inches at Sargent with 7.56 inches falling in 1.5 hours and 10.72 inches in 3 hours this morning. This shows the potential of this air mass to produce excessive rainfall in a short period of time.

Heaviest Rainfall Expected Along US59

As the air mass heats late this morning, expect renewed development along/near the US 59 corridor.

Where exactly this band develops and how defined it becomes remains in question. But higher intensity rainfall rates will be possible in the afternoon and evening hours.

Rainfall Total Forecast

Expect an additional 2-4 inches with isolated amounts of 6 inches this afternoon through Thursday morning.  Remember, 2 inches per hour can cause street flooding. Don’t drive through high water. Park your car on high ground.

To check the rainfall rate per hour, go to http://harriscountyfws.org, click on the a gage near you, then click the “for more information” link that pops up.

Posted by Bob Rehak on 9/18/19 at 10:45 am

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