textproduct: Norman

KEY MESSAGES

Updated at 126 PM CDT Tue Sep 8 2026

- Ongoing heatwave continues through Wednesday with triple digit heat indices and lows well above normal.

- Cooler temperatures and scattered to numerous storms expected late Wednesday into Thursday. Strong to severe storms possible across northern Oklahoma Wednesday afternoon and evening.

- Heat tries to rebound this weekend with low rain chances each day.

NEAR TERM

(Rest of today and tonight) Issued at 126 PM CDT Tue Sep 8 2026

No changes to the forecast for this afternoon. Widespread heat indices of 105-110 F are expected for most of the area. The heat advisory will remain in effect until 7 PM this evening. Surface dewpoints will be a few higher tonight than last night, so overnight lows will be a few degrees higher (upper 70s to low 80s). For reference, the normal low temperature for OKC this time of year is 65 F. Our expected low temperature Wednesday morning is likely to be 10-15 F above normal.

Bunker

SHORT TERM

(Wednesday through Thursday night) Issued at 126 PM CDT Tue Sep 8 2026

Unfortunately, Wednesday's temperatures/heat indices will be very similar to Tuesday's. Triple digit high temperatures are expected, with heat indices in the 105-110 F range. A heat advisory is in effect for most of the area from 12pm - 7 pm. A cold front is expected to move into northern portions of the area during the mid afternoon. Strong to severe thunderstorms will be possible along this frontal boundary as it moves southward. The best juxtaposition of thunderstorms and a favorable environment for severe weather will be across northern Oklahoma. The primary hazard with the strongest thunderstorms will be damaging wind gusts.

The aforementioned cold front will slowly move across the area on Thursday, bringing widespread rain chances and limiting high temperatures from getting up to what we have been getting the previous month and a half. In fact, ensemble probabilities have a 50-70% chance of not exceeding 90 F on Thursday for locations along and north of I-40. For areas south of I-40, it will really depend on how fast the front can move through the area. Generally speaking, scattered to widely scattered showers and storms are possible along/behind the front Thursday. Most guidance would suggest that rainfall amounts less than a half inch are expected for most locations, however, a few localized areas of up to 1 inch will be possible. Nevertheless, any rain is better than no rain!

Bunker

LONG TERM

(Friday through Monday) Issued at 129 AM CDT Tue Sep 8 2026

Ridging will continue to exert its influence over the weekend, resulting in a rebound of temperatures. Interquartile ranges suggest 90s to lower 100s (with the warmest temperatures farther south). Targeted heat advisories may be needed, but widespread advisories look unlikely.

The ridge leaves room for a few shortwaves to ride around the periphery, keeping 10-30% chances for rain in our area over the weekend. A few deterministic models depict an overnight MCS during this time period.

Beyond Sunday, confidence drops significantly. The interquartile spread for high temperatures increases to 15 to 25 degrees as models diverge on the potential approach of another cold front. Warmer solutions (due to stronger ridging) appear to be the more likely scenario, but alternate scenarios (10-20% probability) could bring substantial cooling (highs in the 70s and 80s areawide).

Day

AVIATION

(18Z TAFS) Issued at 1207 PM CDT Tue Sep 8 2026

VFR conditions are expected to continue into Wednesday with generally light south winds. Very low chances (10-30%) for showers and storms will be in place once again this afternoon for portions of southeast OK, where PROB30 was included at KDUA for this afternoon.

PRELIMINARY POINT TEMPS/POPS

Oklahoma City OK 78 101 74 88 / 0 0 60 80 Hobart OK 78 103 75 94 / 0 0 40 60 Wichita Falls TX 78 103 76 98 / 0 0 0 50 Gage OK 76 102 68 90 / 0 30 80 60 Ponca City OK 78 102 70 87 / 0 20 90 50 Durant OK 76 101 75 98 / 0 0 0 40

OUN WATCHES/WARNINGS/ADVISORIES

OK...Heat Advisory until 7 PM CDT this evening for OKZ005>008-011>013- 017>020-023>032-035>048-050>052.

Heat Advisory from noon to 7 PM CDT Wednesday for OKZ005>008- 010>013-015>020-022>048-050>052.

TX...Heat Advisory until 7 PM CDT this evening for TXZ085-086-088>090.

Heat Advisory from noon to 7 PM CDT Wednesday for TXZ083>090.