textproduct: Corpus Christi

KEY MESSAGES

Issued at 121 PM CDT Sun Sep 13 2026

- Major to Extreme risk of heat-related impacts across a large portion of South Texas today through Thursday.

- Heat Advisory in effect through 7 PM today.

- Low rain chances Monday, then increasing to a medium chance Thursday.

- Elevated Fire Weather conditions remain possible through mid week, mainly across the inland Coastal Plains, Brush Country and Rio Grande Plains.

DISCUSSION

Issued at 121 PM CDT Sun Sep 13 2026

Deep moisture is increasing well across the area today with satellite TPW values nearing 2" along the coast. A weak shortwave rotating through under the ridge could be enough to help develop a few sea breeze showers and storms this afternoon, along with some daytime heating showers that have developed in the Victoria Crossroads. Moisture levels decrease some tomorrow, but could still see a few showers/storms, mainly in the Victoria Crossroads. After that, below normal moisture levels Tuesday and Wednesday should result in little to no rain chance. Another wave of moisture moves in for Thursday with moderate rain chances that day. Much drier air moves in for the weekend and could actually give us a bit of a break in minimum temps. More on that in a moment.

Not much change in the summer heat through this period as what has been the warmest September on record for all three of our climate sites will continue to see above normal temperatures for the next several days. For reference, normal highs are as follows: CRP and VCT 90-91, LRD 93-94. At least through Wednesday highs west will be above 100 with mid and upper 90s east. Will have to see how much this increasing moisture and cloud cover Thursday will do, but we should drop at least a couple degrees off for a day or two - that said, the increased moisture would keep it feeling just as hot! Heat index values through mid-week will top out around 110, and will continue to monitor for potential heat advisories daily. The drier air Friday/Saturday likely brings highs back above 100 west. As previously mentioned, the drier air late in the week should allow for a bit more efficient cooling, allowing low temperatures to drop into the lower 70s. Until then though, upper 70s and lower 80s.

AVIATION

(18Z TAFS) Issued at 121 PM CDT Sun Sep 13 2026

VFR and breezy conditions persist this afternoon. Moisture increasing across the area will provide a very low chance for showers/storms at inland terminals this afternoon - too low to include in TAFS, however VCT is expected to experience vicinity showers/storms for the next several hours. Periods of MVFR CIGS are possible toward morning at most sites, but expect mainly VFR conditions.

MARINE

Issued at 121 PM CDT Sun Sep 13 2026

Mainly moderate onshore flow is expected through much of this week with, potentially weakening to gentle to moderate for the weekend. After scattered showers and storms today, rain chances will decrease through Tuesday before increased chances return Wednesday and Thursday.

PRELIMINARY POINT TEMPS/POPS

Corpus Christi 80 98 80 98 / 10 10 10 0 Victoria 77 100 77 98 / 20 20 10 10 Laredo 79 104 78 105 / 0 10 0 0 Alice 76 101 76 102 / 0 10 0 0 Rockport 81 94 81 94 / 10 20 10 0 Cotulla 77 104 77 104 / 10 10 0 0 Kingsville 78 99 77 100 / 0 10 0 0 Navy Corpus 83 95 83 93 / 10 10 10 0

CRP WATCHES/WARNINGS/ADVISORIES

TX...Heat Advisory until 7 PM CDT this evening for TXZ230>234-240>247- 342>344-346-347.

GM...None.