Gretna, Nebraska 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

391
FXUS63 KOAX 091056
AFDOAX

Area Forecast Discussion
National Weather Service Omaha/Valley NE
556 AM CDT Sat May 9 2026

.KEY MESSAGES...

- A cold front will slide south across Nebraska and Iowa
  Saturday. The best chance for showers and storms will be along
  and ahead of the front, in far southeast Nebraska and
  southwest Iowa, Saturday afternoon and evening (20-40%).

- Expect a return to the 80s Monday through Thursday, possibly
  reaching the low 90s by the end of the week.

- Our next widespread chance for rain won`t arrive until
  Thursday (15-30%).

&&

.DISCUSSION...
Issued at 1104 PM CDT Fri May 8 2026

Tonight through Sunday...

Steep lapse rates and weak instability aided in the development of
patchy sprinkles this evening, behind a weak boundary moving towards
the southeastern corner of the CWA. A layer of near-surface dry air
managed to prevent the majority of precip from reaching the surface.
Shower coverage and winds diminished as we moved into the overnight
hours, with dry weather prevailing. Temperatures will remain near
normal overnight, dropping into the mid and upper 40s.

Westerly winds return Saturday morning, advecting warm air into the
region ahead of an approaching cold front. Temperatures will rise
into the lower 80s ahead of the front, with low to mid 70s expected
over northeast Nebraska. CAMs suggest spotty showers will try to
develop over northeast Nebraska, behind the front, by late morning.
However, moisture-starved air below these showers will likely allow
little more than sprinkles to reach the surface. A better chance for
showers and a few rumbles of thunder can be expected along and ahead
of the boundary Saturday afternoon and evening. While a general lack
of instability may inhibit the development of typically
strong/severe storms, inverted-V forecast soundings suggest a few
strong wind gusts may be possible below any showers or storms that
do develop.

Precipitation chances will dwindle across southeast Nebraska through
Saturday evening. High pressure settles in behind the front for
Sunday, keeping us dry and mostly sunny with highs in the 70s.

Monday and Beyond...

A midlevel low will move across southern Canada, into the Great
Lakes early next week, dragging another surface cold front through
the region. Strong southerly winds will draw warmer air back into
the Central Plains Monday and Tuesday, allowing temperatures to rise
back into the low to mid 80s. While current model runs suggest the
best moisture with this system will likely remain well to our east,
a few showers and storms could skirt across eastern fringes of the
forecast area Monday night through early Tuesday morning.

A ridge of high pressure looks to develop over the southwestern
CONUS through the upcoming week, allowing high temperatures to
remain in the 80s, and perhaps the low 90s. Longer range solutions
hint at a low pressure system moving through the northwestern CONUS
Thursday, which could effectively squash the ridge and bring a
chance of showers to the forecast area Thursday into Friday.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 546 AM CDT Sat May 9 2026

Light winds early this morning gradually strengthen out of the
west to northwest through the remainder of the morning. A
developing weather system is approaching the region, increasing
cloud cover. VFR conditions are expected with cloud bases
between 8 to 12 kft. Widely scattered showers are anticipated
this afternoon ahead of a cold front. Very dry air in the
lower levels of the atmosphere should prevent much of this from
reaching the ground. LNK has the greatest chance of showers near
the terminal later this afternoon, but no aviation impacts are
anticipated. Isolated thunder can`t be ruled out but is
unlikely. Winds will quickly become northwesterly and then
northerly late this afternoon and evening as the cold front
moves southeast through the region.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...None.
IA...None.

&&

$$

DISCUSSION...KG
AVIATION...Chehak