NWS update on Harvey’s local impacts

Here is the latest information from our local National Weather Service office:


More rainfall is expected contributing to an already dangerous situation ongoing east of I-35. An additional 8-12 inches of rain is possible through the middle of the week with local amounts of 15 inches still possible.


Although Harvey is still a tropical storm with 30-45mph winds in the yellow shaded area. Wind threats will slowly trend downward tonight and tomorrow. Wind Advisory is still in effect.


Update Since Last Briefing:

  • Tropical Storm Harvey is slowly drifting southeast and was centered between Cuero and Victoria.
  • Tropical Storm Warning cancelled for Atascosa, Bexar, Comal, Hays, Bastrop, and Fayette Counties – replaced with Wind Advisory.
  • Additional rainfall amounts adjusted downward along the I-35 corridor.

Overview:

Tropical Storm Harvey continues a slow drift back to the southeast and at 4 PM was centered between Cuero and Victoria. Harvey will continue southeast and emerge just offshore of the Mid Texas coast Monday afternoon. Harvey is then forecast to make a loop and come back onshore into Southeast Texas Tuesday into Wednesday as a Tropical Storm. Some drier air has worked into the southwest and west side of Harvey, and when combined with a more easterly track we anticipate slightly lower rainfall amounts across the I-35 corridor near San Antonio.  Nevertheless, some moderate to isolated heavy pockets of rainfall will be possible in rain bands through tonight across South Central Texas, primarily east of I-35 and I-37. Some of these bands could produce an additional 2-6 inches overnight east of I-35 and I-37. Occasional wind gusts around 30-45 mph will continue tonight in the Tropical Storm Warning counties across southeastern areas.

Key Messaging Points:

  • A life-threatening heavy rainfall event is ongoing east of I-35 and I-37
  • Since Friday morning, widespread observed rainfall totals of 10-15 inches have occurred east of I-35 and near and north of I-10. Isolated totals as high as 17-20 have been measured across Bastrop and Fayette counties.
  • Additional rainfall amounts of 8-12 inches are possible east of I-35 and I-37 through Wednesday. Isolated higher totals up to 15 inches are possible in this area through Wednesday.
    • Tonight an additional 2-6 inches is possible east of I-35 and I-37.
  • 3-6 inches in Austin metro with locally higher amounts through Wednesday.
  • 1-3 inches in San Antonio metro with locally higher amounts through Wednesday.
  • 1-2 inches across the eastern Hill Country through Wednesday.
  • A tight rainfall gradient will continue on the western edge of Harvey’s precipitation shield. Small shifts in the forecast track of Harvey can result in very large differences in rainfall totals.
  • Devastating mainstem river flooding lasting many days likely east of I-35 and I-37 in the Colorado and Guadalupe river basins.through
  • 30-45 mph wind gusts in Tropical Storm Warning through tonight.
  • 20-35 mph gusts in the Wind Advisory.

Next Briefing

 

By 11 PM Sunday

 

Additional Information Resources:

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