textproduct: Omaha/Valley

KEY MESSAGES

- Widely scattered showers/storms linger this afternoon (10-20% chance). - Hot and humid again today with heat index values in the low 100s across southeast Nebraska and southwest Iowa. A Heat Advisory remains in effect through at least Friday.

- Hot and humid weather continues across the region into the weekend and into next week along with some small chances (10-30%) for nightly storms. Warm lows in the 70s will provide little relief.

DISCUSSION

Issued at 1244 PM CDT Wed Sep 2 2026

The heatwave continues across the region. A few showers and storms linger from near Omaha to Harlan early this afternoon. These showers and storms are expected to continue drifting towards the northeast over the next couple hours. Little rainfall is expected with these. Otherwise, hot and humid conditions remains the main weather story. Temperatures climb well into the 90s across the area under mostly sunny skies. Temperatures may approach the century mark over far southeast Nebraska and southwest Iowa. With dewpoints remaining in the upper 60s to low 70s, expect heat index values in the upper 90s to low 100s. Heat index values may reach up to 105 across southeast Nebraska and southwest Iowa where a Heat Advisory remains in effect. The advisory has been expanded to include portions of south-central Nebraska as the heat continues to build.

Tonight sees limited relief as temperatures will struggle to fall into the low to mid 70s. A nocturnal low-level jet is anticipated to develop overnight across much of the Plains. Our area will reside on the northern terminus of this low-level jet and this supports additional shower and storm development during the early morning hours on Thursday. These showers and storms should remain relatively weak as they drift northeast into early afternoon. Once the limited rain clears, another hot and humid day awaits. Thursday afternoon temperatures remain largely the same as Wednesday, though they increase slightly over northeast Nebraska. Once again, widespread 90s with heat index values in the low 100s will continue to be a hazard. Heading into Friday, expect nearly a carbon copy to Thursday. With this in mind, the Heat Advisory has been extended through at least Friday.

This weekend offers little relief. While the ridge begins to flatten slightly, temperatures on Saturday may only be a degree or two lower. Thankfully, temperatures begin to fall on Sunday and especially next week. At least lower 90s and even upper 80s return to the area. This remains well-above normal, but is welcomed relief from the oppressive heat. Unfortunately, overnight low temperatures do not see nearly as much of a decrease and should remain largely in the 70s. During this time, an active low-level jet and passing weather systems to our north maintain at least a low (10-30%) chance of showers and storms most nights as we close out the forecast period.

AVIATION /00Z TAFS THROUGH 00Z FRIDAY/

Issued at 634 PM CDT Wed Sep 2 2026

VFR conditions are forecast through the next 24 hours, with southerly wind remaining near 10 kts overnight and rain/storm chances drift northeast of KOFK/KOMA. At the moment, KOFK/KOMA have about a 20% chance at seeing the spread out just enough to affect those terminals between 09-14z. Also overnight, strong winds are forecast to develop at FL016, with speeds of 45 kts expected to result in low-level wind shear. By 14z, we drop the LLWS in favor of gusty winds that last through the afternoon of 20-25 kts out of the south.

OAX WATCHES/WARNINGS/ADVISORIES

NE...Heat Advisory until 7 PM CDT Friday for NEZ050>053-065>068-078- 088>093. IA...Heat Advisory until 7 PM CDT Friday for IAZ069-079-080-090-091.