textproduct: Omaha/Valley

KEY MESSAGES

- Mild and mostly quiet weather continues through Saturday, with only a few showers or thunderstorms possible.

- Heat builds this weekend, with the hottest conditions expected Sunday and Monday. Heat index values may reach 105 to 110 degrees.

- Hot and humid conditions are expected to persist into next week, with periodic evening and overnight thunderstorm chances.

DISCUSSION

Issued at 1121 PM CDT Thu Jun 25 2026

Lingering showers should gradually dissipate tonight as a shortwave trough moves east and out of the Plains. Surface high pressure is situated over the northern Plains and this leads to a quiet start to Friday with gradually clearing skies and temperatures in the upper 50s and low 60s. The aforementioned surface high pressure begins to move off to our east Friday afternoon. Partly cloudy skies and the return of southeast winds push temperatures back into the upper 70s to low 80s during the afternoon. Another shortwave trough swings across the northern Rockies heading into Saturday. This strengthens lee troughing, resulting in gusty southeast winds. This keeps temperatures a bit warmer Saturday morning with 60s to start the weekend. By afternoon, a weak disturbance moves out of the central Rockies. This may produce a few thunderstorm over our area, but chances are low and most of the day remains quiet. Temperatures continue to be mild for one more day with low 80s across the area.

The first heat wave of summer builds across much of the central and eastern US beginning this weekend. The worst of this heat arrives Sunday into Monday. Strong south winds under the ridge will help to push warmer temperatures and higher dewpoints north. The strong winds are driven by persistent lee troughing with a large trough persisting over the northern Rockies. Each day temperatures push well into the 90s to near 100 with dewpoints in the upper 60s to low 70s. Peak heat indices in the 100s are likely for many. The highest heat indices may be as high as 105 to 110 degrees. This level of heat may require heat advisories in later forecasts.

The pattern only changes slightly heading into next week. Hot and humid conditions are forecast to continue, though temperatures will be a touch cooler. With changes to the strength and position of the ridge anticipated, this may allow for the return of periodic rain chances. The exact details remain a bit uncertain between ensemble members, but at least some threat of evening or overnight thunderstorms as disturbances round the ridge appears possible. As confidence in the forecast evolution of the ridge improves this weekend, expect more details on the best chance for thunderstorms. Given the hot and humid conditions, any thunderstorms will have plenty of instability to work with, though wind shear is more marginal. Severe weather remains a possibility with this environment.

AVIATION /06Z TAFS THROUGH 06Z SATURDAY/

Issued at 1211 AM CDT Fri Jun 26 2026

VFR conditions with cigs up around 10,000-20,000 ft. Winds out of the norht-northeast will shift easterly overnight, on to southeasterly through Friday morning. We'll be watching MVFR cigs expanding northward from the south through the morning hours. Guidance has locked on to these cigs lifting north through at least KLNK with a 80% chance, while only a 40% chance it gets as far north as KOMA. MVFR cigs will hang around until clouds start to break up from the north during the afternoon.

OAX WATCHES/WARNINGS/ADVISORIES

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