textproduct: Norman

KEY MESSAGES

Updated at 519 PM CDT Tue Aug 11 2026

- Hot temperatures continue for the foreseeable future. Heat Advisory is now in effect through Friday with a decent chance it will have to be eventually extended into the weekend.

- Elevated fire weather across parts of western Oklahoma Tuesday and potentially again Wednesday/Thursday.

NEAR TERM

(Rest of today and tonight) Issued at 142 PM CDT Tue Aug 11 2026

Triple digit temperatures have developed across the post-harvest wheat belt of northwestern Oklahoma as well as portions of the southwest. Heat index values are solidly in the triple digits across almost the entire area with the Red Rock and Lake Carl Blackwell mesonet sites having reached 109 this afternoon already (as of 120 PM).

A cumulus field has developed again although vertical growth has not been as much as recent days. Will still be looking for the potential of isolated showers or storms, but the probability of rain at any one location is very low.

SHORT TERM

(Wednesday through Thursday night) Issued at 142 PM CDT Tue Aug 11 2026

The heat will continue through the work week with heat index values expected to reach 105 or higher in most areas each afternoon through at least Friday and likely longer. Low temperatures recently have been in the mid to upper 70s with some lower 80s as well, and these warm lows will continue preventing significant relief from daytime highs. With the persistence of the heat and the warm nights as well, and in coordination with the NWS office in Tulsa, we have issued a blanket Heat Advisory through Friday. It is likely that this will have to eventually be extended in time, but we will start by issuing it through Friday and work from there.

There is some signal in the synoptic models about convection developing on a surface boundary late Thursday or Thursday night in northwest Oklahoma. With the upper ridge over the area, the chances are still relatively low, and even if we see any development, it would likely be confined to far northwest Oklahoma.

LONG TERM

(Friday through Monday) Issued at 142 AM CDT Tue Aug 11 2026

There's not much to say about the long-term pattern that hasn't already been said. The subtropical ridge will continue to dominate from the Gulf Coast to the southern Plains through the upcoming week. There will be a surge of monsoonal moisture from the Gulf of California northward through Arizona/New Mexico and northeastward into the central Plains. This pattern will encourage thunderstorm development daily throughout the plume. However, for most of us, subsidence from the subtropical ridge looks likely to keep all rain and cooler temperatures away at least through the middle of next week.

The potential exception to the rule is northwest Oklahoma. Here, there is a little more distance from the center of the subtropical high. There's also a little less distance to the Rocky Mountain terrain features that will initiate daily thunderstorms from Friday through the weekend. Thus, low-end nocturnal precipitation chances remain in the forecast in far northwest OK from Friday night through Monday night. For the rest of us, expect hot, dry, and sunny weather to continue.

Meister

AVIATION

(00Z TAFS) Issued at 545 PM CDT Tue Aug 11 2026

VFR conditions will continue at all terminals through the upcoming period. Low-level wind shear is currently forecast across north-central Oklahoma towards daybreak Wednesday morning, with the return of a gusty south-southwesterly wind and patchy diurnal cumulus expected towards midday.

Safe travels!

Ungar

PRELIMINARY POINT TEMPS/POPS

Oklahoma City OK 78 102 79 102 / 0 0 0 0 Hobart OK 78 104 79 104 / 0 0 0 0 Wichita Falls TX 77 104 78 104 / 0 0 0 0 Gage OK 75 104 78 105 / 0 0 0 10 Ponca City OK 79 104 80 103 / 0 0 0 0 Durant OK 78 102 78 102 / 0 0 0 0

OUN WATCHES/WARNINGS/ADVISORIES

OK...Heat Advisory until 8 PM CDT Friday for OKZ004>048-050>052.

TX...Heat Advisory until 8 PM CDT Friday for TXZ083>090.