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A Flash Flood Watch is in effect for Lavaca, DeWitt, and Karnes counties until 7PM Wednesday evening.

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A Flash Flood Watch is in effect for Lavaca, DeWitt, and Karnes counties until 7PM Wednesday evening. Those counties could see 4-6 inches with isolated amounts exceeding 8 inches. The Flash Flood Watch extends to locations south and east towards the coast as well.

Tropical moisture will linger over South Central Texas through Thursday resulting in an extended rainfall event with periods of showers and thunderstorms. Locally heavy rainfall is possible and may cause flooding, especially near the Coastal Plains where the highest rainfall totals are likely. The airmass dries slightly Friday through Monday. Temperatures will warm to above normal by the end of the work week.

Today
Showers and isolated thunderstorms. Locally heavy rainfall possible. Highs in the mid 80s. Temperature steady or slowly falling in the afternoon. Southeast winds 5 to 10 mph. Chance of rain 80 percent.

Tonight
Cloudy with chance of showers and isolated thunderstorms. Lows in the mid 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Thursday
Cloudy with a 50 percent chance of showers and thunderstorms. Highs around 90. Southeast winds 5 to 10 mph.

Thursday Night
Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph.

Friday
Partly cloudy in the morning then clearing. A 20 percent chance of showers and thunderstorms. Highs in the mid 90s. South winds 10 to 15 mph. Highest heat index readings around 107 increasing to around 110 in the afternoon.

Friday Night
Mostly clear. Lows in the mid 70s.

Saturday And Saturday Night
Partly cloudy. Highs in the mid 90s. Lows in the mid 70s.

Sunday
Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs in the lower 90s. Highest heat index readings around 107.

Sunday Night
Partly cloudy. Lows in the mid 70s.

Flood Advisory for Lavaca County Until 2:00 PM

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The National Weather Service in Austin San Antonio has extended the

* Flood Advisory for...
  Lavaca County in south central Texas...

* Until 200 PM CDT

* At 1052 AM CDT, Doppler radar continued to indicate moderate
  toheavy rain that will continue minor flooding in the advisory
  area. Multiple calls to local law enforcement in Lavaca county
  indicated minor flooding impacts such as elevated drainage ditches
  and ponding on roadways.

Additional rainfall of 1-2 inches is expected over the area. This
additional rain will result in continued minor flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Advisory means river or stream flows are elevated, or ponding
of water in urban or other areas is occurring or is imminent.

&&

The heavy rain is on the doorstep of the area and will be moving north into the eastern half of the area today. A Flash Flood Watch is in effect for Karnes, DeWitt, and Lavaca County until Wednesday evening.

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Threats & Impacts:

Rainfall Accumulation Through Thursday:

Less than 1 inch west of Highway 83, 1-3 inches for the I-35 corridor, 2-4 inches east of the I-35 corridor and 4-6 inches for the Coastal Plains. Isolated locations could exceed 8 inches (mainly in the Coastal Plains).

Timing and Overview:

Rainfall will be on the increase throughout the morning in the southern counties as widespread rain moves north from the Corpus Christi area. Rainfall accumulations have exceeded 4 inches there and this could be possible in the southern Coastal Plains counties later this morning. Therefore, a Flash Flood Watch has been issued for Karnes, DeWitt, and Lavaca County. The watch will remain in effect through Wednesday evening to account for additional rainfall on presumed saturated soils tomorrow. Minor flooding will be possible from the heavier cells outside of the areas within the watch. Rain chances will decrease on Thursday.

Confidence:

Moderate

Additional Information Resources:
NWS Austin / San Antonio Webpage: https://www.weather.gov/sanantonio
Report Flooding to us on Twitter using: @NWSSanAntonio and #ewxspotter
Sign up to be Rainfall Observer: https://cocorahs.org/Application.aspx
AHPS River Forecasts: https://water.weather.gov/ahps2/index.php?wfo=ewx

Sincerely,
Nick Hampshire

NWS Austin / San Antonio
Weather Forecast Office
2090 Airport Road
New Braunfels, TX 78130

Karnes-De Witt-Lavaca-
Including the cities of Karnes City, Cuero, and Hallettsville
316 AM CDT Tue Jun 19 2018

…FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY EVENING…

The National Weather Service in Austin/San Antonio has issued a

  • Flash Flood Watch for a portion of south central Texas,
    including the following areas, De Witt, Karnes, and Lavaca.
  • Through Wednesday evening

  • Widespread rain from an abundance of tropical moisture is
    expected to impact the area through Wednesday evening. 3-6
    inches of rain will be possible across the watch area with
    isolated totals possibly exceeding 8 inches.

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.

Increasing tropical moisture will bring the chance for locally heavy rainfall to most of South Central Texas, but especially the Coastal Plains.

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Threats & Impacts:

Rainfall Accumulation Through Thursday:

Less than 1 inch west of Highway 83, 1-3 inches for the I-35 corridor, and 3-5 inches for the Coastal Plains. Isolated locations could receive 7 inches (mainly in the Coastal Plains).

Timing and Overview:

A tropical disturbance will bring a chance of decent rainfall to the area beginning today with the highest coverage expected Monday night through Wednesday. While significant flooding is not expected due to dry antecedent conditions and breaks in activity, minor flooding is possible in areas that pick up the isolated higher totals. The potential minor flooding threat will be highest Tuesday and Wednesday The disturbance is expected to exit the region by Thursday.

Confidence:

Moderate

Additional Information Resources:

NWS Austin / San Antonio Webpage: https://www.weather.gov/sanantonio
Report Flooding to us on Twitter using: @NWSSanAntonio and #ewxspotter
Sign up to be Rainfall Observer: https://cocorahs.org/Application.aspx
AHPS River Forecasts: https://water.weather.gov/ahps2/index.php?wfo=ewx

Sincerely,
Nick Hampshire
NWS Austin / San Antonio
Weather Forecast Office
2090 Airport Road
New Braunfels, TX 78130

Increasing tropical moisture will bring the chance for locally heavy rainfall to most of South Central Texas, but especially the Coastal Plains.

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Threats & Impacts:

Rainfall:

Less than 2 inches west of Highway 281, 1-3 inches for the I35 corridor, and 2-4 inches for the Coastal Plains. Isolated locations could receive 5-7 inches (mainly in the Coastal Plains).

Timing and Overview:

While there is a 20% chance for tropical cyclone development, significant strengthening of the tropical disturbance is not expected. This disturbance will bring a chance of decent rainfall to the area beginning in the eastern half today and spreading to most of South-Central Texas Monday-Wednesday. While significant flooding is not expected due to dry antecedent conditions and breaks in activity, minor flooding is possible in areas that pick up the isolated higher totals. The disturbance is expected to exit the region by Wednesday, but if it strengthens/slows down, the rainfall total forecast could increase slightly.

Confidence:

Moderate

Additional Information Resources:

NWS Austin / San Antonio Webpage: https://www.weather.gov/sanantonio
Report Flooding to us on Twitter using: @NWSSanAntonio and #ewxspotter
Sign up to be Rainfall Observer: https://cocorahs.org/Application.aspx
AHPS River Forecasts: https://water.weather.gov/ahps2/index.php?wfo=ewx

Sincerely,
Nick Hampshire
NWS Austin / San Antonio
Weather Forecast Office
2090 Airport Road
New Braunfels, TX 78130

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