Flooding Rains Impacting Coastal Texas

Heavy rainfall and flash flooding continue to impact parts of Southeast Texas and the far northeast region of Mexico as tropical moisture sourced from the Caribbean shifts over the area.

Continental US - Lower-level Water Vapor - IR
Lower atmospheric water vapor image showing deep tropical moisture streaming into Southeast Texas and northeast Mexico around a broad mid-level circulation (located over South Texas) Tuesday night. White to green is higher moisture content.
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Flash flood warnings in and north of Corpus Christi, TX Tuesday night as rainfall “trains” over the same areas for hours.
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Storm total rainfall (likely in the past 36 hrs) over the same region. Some areas have received up to an estimated 4-8 inches of rainfall.
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Storm Total Rainfall over the Houston Metro and surrounding areas. A core of heavy rainfall occurred today over far southeast Texas and southwest Louisiana. The Lake Charles radar (not shown) which is closer to this core and provides are more accurate estimate shows isolated 5-6 inches of rainfall in the area.

Corpus Christi International Airport has seen over 4.5 inches of rain since Monday night. Endinburg, TX has also seen about 4.5 niches since Monday morning where the heavy rain began earlier. Victoria, TX has seen close to 2 inches since Monday morning. More locally heavy rainfall and possible flash flooding is possible through Wednesday as further tropical moisture spreads over the region.

NAM-WRF 3-km undefined undefined 15
One model forecast for precipitable water over much of Southeast Texas and western Louisiana during the day Wednesday. This is total of amount of liquid in the water column if all the water was precipitated out of the atmosphere. High values with available lift in the atmosphere to form precipitation indicates a high heavy rainfall potential.
NAM-WRF 3-km undefined undefined 29
One model forecast showing total rainfall through midnight CDT Thursday. It indicates areas of heavy rainfall along the south-central Texas Coast. Where the heaviest bands of rain set up ultimately is unknown because of very fine scale variability, although areas near Corpus Christi appear to be the most favored, risking further flash flooding. Some areas could receive an additional 3-5+ inches of rain Tues night-Thursday.

Please avoid flooded roads as fast moving currents in unexpectedly deep water can sweep a vehicle away easily and roads may be washed out and unseen under the water. Keep track of the latest weather in your area prior to and while traveling as well.

–Meteorologist Nick Humphrey

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Author: Meteorologist Nick Humphrey

Meteorologist and geoscientist in Lincoln, NE. Seattle, WA native. Love weather, storm chasing/photography and planetary science.

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