4 PM Update on TS Harvey from the National Weather Service

Here’s the 4 p.m. report on Hurricane Harvey from the National Weather Service covering southeast Texas:

Harvey has weakened to a Tropical Storm but is still expected to meander over for the next 5 days. A slow track over the area will mean periods of heavy rain from today into at least Wednesday are highly likely.

Tropical Storm Harvey Local Statement Advisory Number 26
This product covers Southeast Texas **TROPICAL STORM HARVEY BARELY MOVING** NEW INFORMATION —————

* CHANGES TO WATCHES AND WARNINGS: – None

* CURRENT WATCHES AND WARNINGS: – A Tropical Storm Warning and Storm Surge Watch are in effect for Chambers and Harris – A Tropical Storm Warning is in effect for Austin, Colorado, Fort Bend, Liberty, Waller, and Wharton – A Storm Surge Warning and Tropical Storm Warning are in effect for Brazoria, Galveston, Jackson, and Matagorda

* STORM INFORMATION: – About 100 miles west-northwest of Matagorda TX – 29.1N 97.6W – Storm Intensity 65 mph – Movement Stationary SITUATION OVERVIEW —————— Tropical Storm Harvey is barely moving and still producing bands of very heavy rainfall this afternoon. Continued heavy rainfall and the flooding it causes is the primary threat to Southeast Texas. Numerous flash flood warnings have been issued across the area, and widespread flooding is possible into early week at the least. Tornadoes have also occurred in the area through the day, and will continue to be a threat tonight. Coastal flooding can be expected at the shore where winds will continue to push water onshore. Tropical storm force winds are still a potential threat, primarily in the southwestern portions of the area towards Matagorda Bay. Storm surge will be slow to recede through Sunday, particularly west of Freeport. Though there are multiple hazards present in the area, the greatest threat to life and property in the coming days are tied to the potential for extreme rainfall amounts. This rain will lead to a prolonged, dangerous, and potentially catastrophic flooding event well into next week. POTENTIAL IMPACTS —————–

* FLOODING RAIN: Potential impacts from the flooding rain are still unfolding across Southeast Texas. Remain well guarded against life-threatening flood waters having possible catastrophic impacts. If realized, these impacts include: – Extreme rainfall flooding may prompt numerous evacuations and rescues. – Rivers and tributaries may overwhelmingly overflow their banks in many places with deep moving water. Small streams, creeks, canals, and ditches may become raging rivers. Flood control systems and barriers may become stressed. – Flood waters can enter numerous structures within multiple communities, some structures becoming uninhabitable or washed away. Numerous places where flood waters may cover escape routes. Streets and parking lots become rivers of raging water with underpasses submerged. Driving conditions become very dangerous. Numerous road and bridge closures with some weakened or washed out.

* WIND: Potential impacts from the main wind event are now unfolding across the Matagorda Bay area. Remain well sheltered from dangerous wind having possible significant impacts. If realized, these impacts include: – Some damage to roofing and siding materials, along with damage to porches, awnings, carports, and sheds. A few buildings experiencing window, door, and garage door failures. Mobile homes damaged, especially if unanchored. Unsecured lightweight objects become dangerous projectiles. – Several large trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Several fences and roadway signs blown over. – Some roads impassable from large debris, and more within urban or heavily wooded places. A few bridges, causeways, and access routes impassable. – Scattered power and communications outages, but more prevalent in areas with above ground lines. Elsewhere in Southeast Texas, there is the potential for winds having limited to significant impacts. Winds are expected to be strongest in and near the strongest thunderstorms in rain bands.

* SURGE: Potential impacts from the main surge event are now unfolding across the Upper Texas Coast, primarily west of Sargent. Remain well away from life-threatening surge having possible significant impacts. If realized, these impacts include: – Areas of inundation with storm surge flooding accentuated by waves. Damage to several buildings, mainly near the coast. – Sections of near-shore escape routes and secondary roads become weakened or washed out, especially in usually vulnerable low spots. – Major beach erosion with heavy surf breaching dunes. Strong and numerous rip currents. – Moderate damage to marinas, docks, boardwalks, and piers. Several small craft broken away from moorings, especially in unprotected anchorages. Potential impacts from the main surge event are also now unfolding across the Upper Texas Coast east of Sargent. Remain well away from locally hazardous surge having possible limited impacts.

* TORNADOES: Potential impacts from tornadoes are still unfolding across Southeast Texas. Remain well braced against a tornado event having additional limited impacts. If realized, these impacts include: – The occurrence of isolated tornadoes can hinder the execution of emergency plans during tropical events. – A few places may experience tornado damage, along with power and communications disruptions. – Locations could realize roofs peeled off buildings, chimneys toppled, mobile homes pushed off foundations or overturned, large tree tops and branches snapped off, shallow-rooted trees knocked over, moving vehicles blown off roads, and small boats pulled from moorings.

PRECAUTIONARY/PREPAREDNESS ACTIONS ———————————- * EVACUATIONS: Do not return to evacuated areas until hazardous winds diminish and flood waters abate. RECOVERY PHASE – Do not return to evacuated areas until it is safe. Listen for the all-clear signal from local authorities. * OTHER PREPAREDNESS INFORMATION: Now is the time to remain safely sheltered from the storm. Stay inside and away from windows. Listen for updates and be ready in case you lose electrical power. Locate your battery powered radio and flashlight from your Emergency Supplies Kit. Keep these items close. During the peak of the storm, keep your shoes on and rain gear handy. Boots and tennis shoes offer the best foot protection if you become unexpectedly exposed to the elements. Continue to keep your cell phone well charged for as long as possible. If you lose power, use it more sparingly and mainly for personal emergencies and check-ins. Do not overload communications systems with idle chatter. Do not be a thrill seeker or risk your life for senseless photos or videos. Be wise and avoid becoming another statistic. Be ready to move to the identified safe room if a tornado warning is issued. Quickly move to an interior room on the lowest floor. Put as many sturdy walls between you and the storm as you can. Protect your head and body.

* ADDITIONAL SOURCES OF INFORMATION: – For information on appropriate preparations see ready.gov – For information on creating an emergency plan see getagameplan.org – For additional disaster preparedness information see redcross.org NEXT UPDATE ———– The next local statement will be issued by the National Weather Service in Houston/Galveston TX around 10 PM CDT, or sooner if conditions warrant.

 

Flood Watch National Weather Service Houston/Galveston TX 356 PM CDT Sat Aug 26 2017

Austin-Brazoria-Brazos-Burleson-Chambers-Colorado-Fort Bend- Galveston-Grimes-Harris-Houston-Jackson-Liberty-Madison-Matagorda- Montgomery-Polk-San Jacinto-Trinity-Walker-Waller-Washington- Wharton- Including the cities of Alvin, Anahuac, Angleton, Bay City, Bellville, Brenham, Brookshire, Bryan, Caldwell, Cleveland, Coldspring, College Station, Columbus, Conroe, Corrigan, Crockett, Dayton, Eagle Lake, Edna, El Campo, Freeport, Friendswood, Galveston, Groveton, Hempstead, Houston, Humble, Huntsville, Katy, Lake Jackson, Lake Somerville, League City, Liberty, Livingston, Madisonville, Missouri City, Mont Belvieu, Navasota, Onalaska, Palacios, Pasadena, Pearland, Pierce, Prairie View, Richmond, Rosenberg, Sealy, Shepherd, Sugar Land, Texas City, The Woodlands, Tomball, Trinity, Weimar, Wharton, Willis, and Winnie 356 PM CDT Sat Aug 26 2017 …FLASH FLOOD WATCH NOW IN EFFECT THROUGH WEDNESDAY EVENING… The Flash Flood Watch is now in effect for * Portions of Southeast Texas and southeast Texas…including the following counties…in Southeast Texas…Jackson. In southeast Texas…Austin…Brazoria…Brazos…Burleson… Chambers…Colorado…Fort Bend…Galveston…Grimes…Harris…Houston…Liberty…Madison…Matagorda… Montgomery…Polk…San Jacinto…Trinity…Walker…Waller… Washington and Wharton. * Through Wednesday evening * Periods of heavy rainfall are likely as rainbands from Harvey move across the area. Event rainfall totals through Wednesday evening are expected to be 15 to 30 inches with isolated maximum amounts of 40 inches. The greatest rainfall threat area is expected to be generally along and south of a line from College Station to Livingston. Rainfall of this magnitude will cause catastrophic and life-threatening flooding. * The Flash Flood Watch could be extended beyond Wednesday evening. * Before traveling, check road conditions with Texas Department of Transportation, Houston TranStar, or other trusted sources. Rainfall of this magnitude could cause major flooding of the highway system. PRECAUTIONARY/PREPAREDNESS ACTIONS… A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.