922 FXUS63 KOAX 151703 AFDOAXArea Forecast Discussion National Weather Service Omaha/Valley NE 1203 PM CDT Mon Sep 15 2025
.KEY MESSAGES...
- Additional rounds of showers and storms are expected through the week. A few strong storms are possible Tuesday afternoon, with pockets of heavy rain at times through the end of the week.
- Temperatures remain warmer than normal through Tuesday, but highs return to the mid 70s for Wednesday through Saturday.
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.DISCUSSION... Issued at 227 AM CDT Mon Sep 15 2025
Today through Tuesday...
Showers and storms continued to fester over the forecast area last night, before greatly diminishing in coverage and intensity around midnight. By 2 AM, temperatures had dipped into the low to mid 60s.
Isolated showers and perhaps a few rumbles of thunder will continue to be possible through the morning hours before the better forcing shifts to our east this afternoon and evening. Temperatures will remain warm today and Tuesday, topping out in the mid to upper 80s, as southerly flow lingers over the region.
Tuesday Evening and Beyond...
Models continue to depict a trough dropping out of the northern intermountain region, into the northern Plains by mid week, eventually forming a closed low. Multiple surges from vort maxes around this low will bring additional chances for precipitation this week. Generally dry weather is expected to persist through the majority of the day Tuesday, outside of a slight chance (15-20%) for subtle shortwave energy triggering a shower or two along the fringes of our forecast area. Rain chances increase Tuesday evening and into the overnight hours (30-60%) as the lead vort max approaches from the west. While there is a chance for some of these storms to remain strong to severe, with gusty winds and large hail, as they move into eastern Nebraska, current guidance suggests the better chance for severe storms will be just to our west, where the stronger shear and forcing align with peak daytime heating.
An additional surge of moisture pushes into the Central Plains Wednesday, as another strong vort max dances into the region. Expect a gloomy day, with widespread showers and storms (60-80%). Locally heavy rainfall amounts may be possible. The closed low looks to take its sweet time moving through the central plains, late next week. Expect off and on rain chances to persist Thursday (40-60%) and Friday (30-50%).
Temperatures will dip closer to normal by Wednesday, ranging from the 70s in the west to low 80s in southwest Iowa. Expect even cooler temps, in the low to mid 70s, to filter in Thursday through next weekend, as the upper low continues to churn over the region.
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.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1202 PM CDT Mon Sep 15 2025
VFR conditions are expected to prevail through the forecast period, with little to no cloud cover. Gusty south winds with sustained speeds of around 12 kt will diminish by 16/00z.
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.OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None.
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DISCUSSION...KG AVIATION...Mead
NWS OAX Office Area Forecast Discussion