849
FXUS63 KOAX 052251
AFDOAX

Area Forecast Discussion
National Weather Service Omaha/Valley NE
551 PM CDT Sat Sep 5 2026

.KEY MESSAGES...

- Oppressive heat will continue into next week, with warm lows
  in the 70s providing little relief.

- There will be periodic shower and storm chances (20-50%),
  throughout the upcoming week. Severe weather chances remain
  low (generally 5% or less), but a few storms could produce
  gusty winds and hail in northeast Nebraska and western Iowa Sunday
  afternoon and evening.

&&

.DISCUSSION...
Issued at 1215 PM CDT Sat Sep 5 2026

Tonight through Monday...

Scattered storms trained over northeast Nebraska this morning,
dropping a quick 1-3" of rain, and occasionally flirting with severe
limits. A Flood Advisory was issued near Niobrara, where heaviest
rainfall persisted. Storm coverage will continue to gradually
diminish through the late morning, allowing oppressive heat to reign
over the region. By noon, temperatures had spanned from the lower
70s, where cloud cover prevailed in northeast Nebraska, to the low
90s over southeast Nebraska where sunshine was abundant. Dewpoints
in the low to mid 70s made it feel 100-105 in the hottest locations.

A shortwave disturbance moving out of the Rockies will help ignite
another round of storms that will approach from the west late
tonight into Sunday morning. Storms, fueled by daytime heating, are
expected to increase in coverage through the afternoon. Around 20-30
kts of deep layer shear could be just enough to help organize a
strong storm or two capable of producing damaging winds or
marginally severe hail during the late afternoon and evening hours.
The greatest chance for severe weather will likely be over far
northeast Nebraska into western Iowa.

The good news is persistent patchy cloud cover combined with a brief
flattening of the upper ridge should be just enough to take
temperatures down a few degrees. Expect afternoon highs to "only"
reach the upper 80s and low 90s, dropping heat indices to 90-100.
Similar temperatures are expected Monday, due in part by scattered
storm chances persisting, as the shortwave continues to make its way
around the periphery of the ridge.

Tuesday and Beyond...

A low pressure system that has been churning over the Pacific
Northwest this weekend will finally eject across southern Canada by
midweek, dragging a cold front through the Central Plains.  The
exact timing and speed of the passage will dictate shower and storm
potential, with an afternoon passage leading to higher strong to
severe storm potential as storms try to take full advantage of
surface instability.

The boundary will finally push south of the forecast area on
Thursday, with more zonal flow expected to prevail in its wake.
While temperatures may surge into the mid and upper 90s ahead of the
front on Tuesday, expect some relative relief from the heat (highs
in the 80s) to arrive by Wednesday and continue through the end of
the week.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 546 PM CDT Sat Sep 5 2026

VFR conditions are favored through the forecast period. South-
southeasterly winds at 8-12 kts, with a few gust up to 20 kts,
will gradually calm under 12 kts this evening. Winds will become
more easterly through the morning hours. Scattered showers and
thunderstorms will push in from west to east after 06/18Z. This
chances has been left out of the current forecast package due to
the low confidence in timing and coverage. The highest
probability of impacts (30-40%) is at KOFK and KOMA during the
final few hours and just past the end of the forecast period.
Patchy MVFR conditions, brief gusty winds, and small hail will
be possible under any stronger storms.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...Heat Advisory until 7 PM CDT this evening for NEZ044-045-
     050>053-065>068-078-088>093.
IA...Heat Advisory until 7 PM CDT this evening for IAZ055-056-069-
     079-080-090-091.

&&

$$

DISCUSSION...KG
AVIATION...Wood