textproduct: Omaha/Valley

KEY MESSAGES

- Cooler air will continue to fill in behind the passing cold front. Saturday and Sunday morning low temperatures will dip below freezing for many locations. Damage to sensitive outdoor vegetation will be possible.

- Dry conditions and gusty winds will lead to Very High to Extreme Fire Danger across northeast Nebraska and into western Iowa Saturday afternoon and evening.

- A gradual warming trend begins on Sunday. Relatively warm, dry, and quiet weather will accompany this until our next potential weather system by the middle of next week.

DISCUSSION

Issued at 109 PM CDT Fri Apr 17 2026

Today through Sunday...

A strong cold front swept through the region today, pushing colder air through the forecast area. Temperatures in the 70s across the area this morning fell 20 degrees into the 50s in as little as 20 minutes. Warm moist air surged ahead of the front, increasing instability and priming the environment for severe storms. Thankfully, as of 1 PM, the boundary has edged just southeast of our border as storms begin to bubble up ahead of it. Storms will be sequestered to the warm sector ahead of the front, precluding us from any severe potential this afternoon and evening.

Cold air will continue to pour into the region behind the front tonight, with temperatures plummeting into the upper 20s over northeast Nebraska, and low to mid 30s along and south of I-80. Thankfully winds are expected to remain breezy overnight, out of the north at speeds of 10-15 mph, with gusts up to 15-20 mph, which would promote mixing near the surface and potentially prevent frost formation. Either way, sensitive early season vegetation may be at risk for damage with sub-freezing conditions over parts of northeast Nebraska. After collaboration with some of our agriculture partners, we have opted to issue a Freeze Warning for a swath of eastern Nebraska that appears to be the most susceptible, despite the fact that we are still ahead of our average final Spring freeze. The risk for damage will increase Saturday night/early Sunday morning with similarly cold temperatures, but little to no wind to prevent frost. Future headlines will likely need to be considered.

Highs on Saturday will bounce back into the mid 50s to around 60 in the afternoon. Excessively dry air behind the front will drop relative humidities to 15-25%. Winds will remain breezy, out of the northwest at 15 to 25 mph, with gusts up to 25-35 mph expected. Given the breezy, dry conditions, portions of northeast Nebraska and western Iowa, primarily along and northwest of a line from Friend, NE to Dunlap, IA could see very high to extreme fire danger conditions Saturday afternoon. Therefore, a Red Flag Warning has been issued for Saturday afternoon and evening. Sunday warms back into the upper 60s to low 70s. While the air will be dry, with minimum relative humidities ranging from 15-20 percent, winds will be much lighter at 5-10 mph with gusts to 15 mph, which would quell extreme fire danger concerns.

Monday and Beyond...

High pressure will settle over the Central Plains early next week, behind the departing upper tough. Temperatures will creep back into the 70s Monday and reach the 80s Tuesday and Wednesday. Dry conditions combined with increasing winds, due to a tightening pressure gradient ahead of an approaching surface low, could bring another day of increased fire danger early next week.

Our next chance for precipitation looks to arrive late next week, as an upper trough and previously mentioned surface low move into the region. Shower and thunderstorm chances increase Wednesday night through Friday, with temperatures likely cooling as we head into next weekend.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 1203 PM CDT Fri Apr 17 2026

A strong cold front has swept through the region bringing gusty northwest winds. Expect winds to continue to gust up to 25-35 kts through the afternoon, before gradually diminishing this evening. Speeds should dip to 12 kts or below by around 06Z tonight, before increasing again shortly after 12Z Saturday morning. VFR conditions are expected to prevail through the majority of the period, however patchy MVFR ceilings may be possible at KOFK for the next few hours.

OAX WATCHES/WARNINGS/ADVISORIES

NE...Red Flag Warning from noon to 8 PM CDT Saturday for NEZ011-012- 015>018-030>034-042>045-050-051-065. Freeze Warning from 1 AM to 9 AM CDT Saturday for NEZ030- 042>044-050-051-065-078-088. IA...Red Flag Warning from noon to 8 PM CDT Saturday for IAZ043.