From NWS:

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Hi all,

Just wanted to give you an update concerning the weather for the period beginning this evening and continuing through Sunday.  A cold front will bring widespread showers and thunderstorms across SE TX tonight.


It is expected to enter extreme NW portions of the area (Crockett-College Station) early this evening and then move offshore early Friday morning.  Expect to see widespread 1 to 2 inch rainfall amounts generally north of I-10 with isolated amounts around 3 inches.  

South of I-10, expect widespread 1/2 to 1 inch rainfall amounts with isolated amounts up to 2 inches.

There is a slight risk of severe thunderstorms tonight generally along and northwest of a Brenham to Conroe to Livingston line, with the primarily threat being hail and strong straight line winds.

The main upper level storm system will remain well SW of the area, and will continue to send weak disturbances across SE TX Friday afternoon through Saturday.  So, we do expect some more light to moderate rain across the area during this period.

However, locally heavy rainfall will likely hold off until some point late on Saturday when the main upper level storm system begins to move northeast across west and north TX.  

As this happens, a surface low will likely form inland, and along with a warm front, will likely provide the focus for another round of heavy rainfall that will continue into Sunday.  

Because of this 2nd period of potential heavy rainfall, we will continue to monitor the flood threat over the weekend, as we may be able to pile up some high totals where cell training occurs.  

We still have considerable uncertainly concerning the location and magnitude of the rainfall during the weekend event.  However, when you add up rainfall totals for this whole period (Tonight through Sunday) it is reasonable to expect that some areas across SE TX will see total rainfall amounts in the 4 to 7 inch range, and the most likely area for these high totals to occur appears to be along and northwest of HWY 59 at this time.

Because heavy rain will also fall north of SE Texas, we will be monitoring the Trinity river for potential flooding this
weekend.

I will send out another update tomorrow morning and will provide the latest thinking concerning the weekend rainfall.

Thanks,
Lance