textproduct: Omaha/Valley

KEY MESSAGES

- Hot temperatures in the 90s with heat index values of 100+. Overnight temperatures in the 70s offer limited relief.

- Nightly shower and thunderstorm chances across portions of the area. There is a low chance of severe weather, especially on Tuesday.

DISCUSSION

Issued at 1210 PM CDT Mon Aug 31 2026

I wish there was good news to discuss in the forecast, but this is not the case. A stagnant weather pattern will fully settle in over the region, locking in similar weather for each day. A large upper-level high pressure has parked over the Gulf Coast. The central Plains and Midwest resides on the northern periphery of this feature. As a result, hot temperatures and periodic showers and thunderstorms are to be expected each day. The most likely timing for any showers and thunderstorms will be overnight with the aid of the low-level jet and warm advection. Otherwise, daytime heat keeps a cap in place and thunderstorms at bay.

Earlier morning showers and thunderstorms have lifted out of the area, leaving behind a sunny, but humid, afternoon. Temperatures should climb well into the 90s with heat index values approaching 100. Another round of showers and thunderstorms is anticipated tonight, especially over northeast Nebraska. With humid conditions and clouds, temperatures struggle to cool into the lower 70s. Any rain should dissipate or exit the region during the late morning hours on Tuesday. Tuesday will likely see temperatures a touch higher than today, but dewpoint temperatures may decrease slightly. In the end, heat index values near 100 are likely once again. Heading into Tuesday night, the next round of showers and thunderstorms is expected. This round may have a slightly better environment to work with, so a low chance of damaging winds and large hail accompanies any stronger thunderstorms. Temperatures struggle to cool with continued rain and clouds with Wednesday morning temperatures in the 70s and a bit warmer than the previous morning.

Wednesday and beyond is much of the same as the previous days, but the heat may increase further. With the prolonged nature of the heat, heat products may need to be considered. While the current forecast does trend temperatures down slightly to close out the week, long-range ensemble guidance is indicating that the worst of the heat may linger into the weekend. In this case, a prolonged heatwave would likely require heat products, especially as overnight temperatures offer limited relief. Outside of the heat, at least a low chance of overnight showers and thunderstorms continues to be the norm.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 1158 AM CDT Mon Aug 31 2026

VFR conditions are anticipated for the remainder of the afternoon and evening. Morning showers have cleared the region and skies are quickly clearing. Light north winds should gradually become westerly this afternoon before shifting to the southeast tonight. After 06Z, a band of showers with a few thunderstorms is forecast to develop across northeast Nebraska. The timing and location of this band of showers and thunderstorms is uncertain with only a low chance of aviation impacts at this time. The threat of lightning is low with mainly showers expected. Any showers or thunderstorms will dissipate or exit the area to the east late TUesday morning.

OAX WATCHES/WARNINGS/ADVISORIES

NE...None. IA...None.