textproduct: Omaha/Valley

KEY MESSAGES

- A few showers and storms are expected this evening/tonight, particularly for areas along and south of Hwy 92.

- Isolated showers and storms will be possible Friday night/Saturday morning, limited to northeastern Nebraska.

- Expect very hot and humid conditions Sunday through Tuesday as highs reach into the 90s to low 100s each day and heat index values approach 105.

DISCUSSION

Issued at 152 PM CDT Wed Jun 24 2026

The forecast period starts out with a weak upper ridge over southern Wyoming/northern Colorado. A weak shortwave crosses into the region this evening/tonight. A few showers and thunderstorms will be possible, particularly for areas along and south of Hwy 92 as the system rolls through. MLCAPE values of 500-1000 J/kg and DCAPE values of 800-1200 J/kg are expected for areas along and south of a line from the Omaha Metro to York. Wouldn't entirely rule out a strong storm or two developing with mainly a wind threat, particularly for areas south of Lincoln this evening/tonight.

Thursday brings a shift in the pattern as a couple of weak shortwave troughs moves across the Wyoming/Colorado border, shifting us into more of a zonal flow pattern through Friday. Expect a slight cool down as temperatures rise mainly into the 70s, with a few isolated 80s possible along portions of the Missouri River. As the shortwaves move through Nebraska, there will be a chance (20-50%) of showers and thunderstorms. These chances are expected to taper off west to east by Thursday morning.

We maintain zonal flow Friday with a deepening upper low over the Aleutian Islands and the PACNW. Expect this to be the last cool-ish day for awhile, with highs ranging form the mid-70s to mid-80s.

Heading into the weekend, the upper low will push ashore over the West Coast, although there is still some uncertainty in where it will eventually come ashore. A broad upper trough will extend from the West Coast to the Rockies, amplifying a ridge over the Midwest and putting the Great Plains under southwest flow. Saturday highs will reach into the mid to upper 80s. Sunday and beyond, forecasted high temperatures are expected to be in the 90s to low 100s. Heat index values for many areas will range from 96-105. Southwest flow remains over us through the extended forecast. A few disturbances are expected to move into the plains, which could ultimately give us a chance for a few showers/storms.

AVIATION /18Z TAFS THROUGH 18Z THURSDAY/

Issued at 1232 PM CDT Wed Jun 24 2026

VFR conditions persist through much of the forecast period. Northwest winds become northerly after 00Z, before becoming light and variable this evening. Model guidance continues to show some support for shower/storm activity after 00Z; however, chances have decreased somewhat.

OAX WATCHES/WARNINGS/ADVISORIES

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