Hurricane Harvey

Saturday, August 26, 2017 / 5 am:

…Harvey maintains well defined eye 40 miles inland…

…Maximum sustained winds near 100 mph…

…Main threats gradually switching to inland flooding and tornadoes…

Extensive damage is being reported from some of the smaller cities (Rockport, Port Aransas, Lamar, Fulton) that took direct hits by the eyewall of Harvey.   Texas Power reports 211,000 without electricity.

Friday, August 25, 2017 / 11pm:

…Harvey still dangerous Category 4 hurricane…

…Long duration and catastrophic inland flooding event begins…

…30 to 50 inches of rainfall expected to occur in some areas…

Harvey is now centered just northeast of Rockport, Texas.  Movement has slowed and the storm is moving northwest at around 5 mph.  Surface observing sites have recorded a pressure as low as 945 mb and wind gusts over 130 mph.

Model data this evening maintains previous signal that Harvey will move very little over the next 72-96 hours.   Should that occur, an unprecidented amount of rain is likely to fall over a large area.  Resulting flooding will have a high impact on lives and property.

Friday, August 25, 2017 / 6 pm:

…Harvey becomes dangerous Category 4 hurricane…

…Nearing landfall, currently 25 miles east southeast of Port Aransas…

…Tornado threat ramping up between Port Aransas and Houston…

…Rare, Extreme Wind Warning in effect…

…Catastrophic flooding over the next several days will become main story – rain totals could approach 40 inches…

The National Weather Service in Corpus Christi has issued a

 

* Extreme Wind Warning for…

Southwestern Calhoun County in south Texas…

Aransas County in south central Texas…

East central Nueces County in south central Texas…

Eastern San Patricio County in south central Texas…

Central Refugio County in south central Texas…

 

* Until 700 PM CDT

 

* At 454 PM CDT, National Weather Service Doppler radar indicated

extreme winds, associated with the eyewall of Hurricane Harvey,

were moving onshore 17 miles east of Key Allegro, or 18 miles east

of Rockport, moving northwest at 25 mph. This is an extremely

dangerous and life-threatening situation!

 

PRECAUTIONARY/PREPAREDNESS ACTIONS…

 

Widespread destructive winds of 115 to 145 mph will spread across

Calhoun County, Aransas County, Nueces County, San Patricio

County, Refugio County, producing swaths of tornado-like damage.

 

TAKE COVER NOW! Treat these imminent extreme winds as if a tornado

was approaching and move immediately to the safe room in your

shelter. Take action now to protect your life!

Friday, August 25, 2017 / 2 pm:

The center of Harvey is located 79 miles east southeast of the Corpus Christi radar site.  Maximum sustained winds remain at 110 mph.  Some further strengthening is still possible before landfall.

Friday, August 25, 2017 / 9 am:

Dramatic views of Harvey now located 127 miles southeast of the Corpus Christi radar site.

The minimum central pressure has fallen to 948 mb and winds have increased to 110 mph, on the threshold of becoming a Category 3 storm.

Outer bands are now arriving along parts of the Texas coast.  All preparations should be completed.

Friday, August 25, 2017 / 4 am:

…Harvey strengthens to Category 2 storm…

After spending most of last evening with no change in strength, Harvey has undergone steady strengthening this morning.  The eye of Harvey is well defined and located about 125 miles due east of the Brownsville, Texas radar site -

Harvey is moving toward the northwest at 10 mph and has sustained winds of 105 mph.  The minimum central pressure has fallen to 967mb.  Further intensification is expected today, and winds may approach 120 mph (Category 3) over the next 12 hours.

Storm surge and flooding rainfall will be the most dangerous aspects of this storm.  As Harvey moves inland, the storm is expected to slow down, resulting in a prolonged excessive rainfall event.

Harvey is expected to produce total rain accumulations

of 15 to 25 inches and isolated maximum amounts of 35 inches over

the middle and upper Texas coast through next Wednesday. During

the same time period Harvey is expected to produce total rain

accumulations of 7 to 15 inches in far south Texas and the Texas

Hill Country eastward through central and southwest Louisiana, with

accumulations of up to 7 inches extending into other parts of Texas

and the lower Mississippi Valley. Rainfall from Harvey will cause

devastating and life-threatening flooding.

Warning summary this morning:

A Storm Surge Warning is in effect for…

* Port Mansfield to High Island Texas

 

A Storm Surge Watch is in effect for…

* South of Port Mansfield Texas to the Mouth of the Rio Grande

 

A Hurricane Warning is in effect for…

* Port Mansfield to Sargent Texas

 

A Tropical Storm Warning is in effect for…

* North of Sargent to High Island Texas

* South of Port Mansfield Texas to the Mouth of the Rio Grande

 

A Hurricane Watch is in effect for…

* South of Port Mansfield Texas to the Mouth of the Rio Grande

 

A Tropical Storm Watch is in effect for…

* South of the Mouth of the Rio Grande to Boca de Catan Mexico

Thursday, August 24, 2017 / 3 pm:

Hurricane Harvey has rapidly intensified over the past 18 hours, and a significant amount of further intensification is likely before the storm reaches the Texas coast.  Harvey is now expected to be a major, category 3 hurricane at landfall.

A Hurricane Warning is in effect for…

* Port Mansfield to Matagorda Texas

A Tropical Storm Warning is in effect for…

* North of Matagorda to High Island Texas

* South of Port Mansfield Texas to the Mouth of the Rio Grande

A Hurricane Watch is in effect for…

* South of Port Mansfield Texas to the Mouth of the Rio Grande

 

One minute GOES16 imagery: