961
FXUS63 KOAX 152233
AFDOAX

Area Forecast Discussion
National Weather Service Omaha/Valley NE
533 PM CDT Wed Jul 15 2026

.KEY MESSAGES...

- 10-25% chance of patchy dense fog early Thursday.

- Temperatures mainly in the lower to middle 90s today and
  Thursday, except along the Nebraska-South Dakota border where
  temperatures will rise to near 100.

- Temperatures increase into the 95-100 degree range areawide
  Friday through Monday. Heat indices generally will be 100 to
  105F at times from Friday, Saturday, Sunday and Monday.
  Locations along the Nebraska-South Dakota border may see heat
  indices 105-110.

- Dry conditions expected through at least late Sunday.

&&

.DISCUSSION...
Issued at 156 PM CDT Wed Jul 15 2026

Today and Thursday...

Sensible weather is uneventful in the short range, though on
the warm side. Low level theta-e increases as southerly flow
returns to the area, and will be locally enhanced by corn-sweat
diabatic effects will keep conditions muggy. Average high
temperature running 5 degrees above normal. Low temperatures
have been near normal, but several locations are running above
normal due to dewpoints in the upper 60s.

Friday through Monday...

500 mb upper level ridge axis moves eastward, and will be
centered over the western high plains Sunday and Monday. These
two days look to be the warmest days, with temperatures 95-100
across eastern Nebraska both days. Western Iowa doesn`t look as
warm, but warm enough with reading in 95 to 99 degree range.
Heat indices in the 100 to 105 ranges, with heat indices 106-109
along the Nebraska-South Dakota border, equate to High Heat
Risk in a few locations. Will hold on heat headlines for now
based on collaboration with neighbors, but will continue to
message in briefing packets and social media.

A short-wave moving across the Canadian plains late Sunday
night, helps suppress the ridge. Thunderstorms that develop in
the lee of the southern Rockies, may hold together and affect
portions of northeast Nebraska late Sunday, though probabilities
in the 20-30% range.

Tuesday through Wednesday...

The aforementioned short-wave sends a cold front through the
region and will bring relatively cooler conditions to the
region, with high temperatures falling back into upper 80s and
lower 90s on Tuesday and mainly the 80s on Wednesday. Lows in
the 60s. There`s another glimmer of precipitation late Tuesday
int Wednesday with multi-model ensembles showing a weak short-
wave supressing the H5 ridge axis and developing showers and
storms across the region late Tuesday, with additional
development during the day on Wednesday due to an stream of
higher theta-e returning to the region.

&&

.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 527 PM CDT Wed Jul 15 2026

VFR conditions are favored through the evening before patchy
fog development increases into Thursday morning. Scattered
cumulus clouds around FL050 will dissipate into the evening.
The best potential for MVFR visibility overnight will be at
KOFK (40% chance), with lower probabilities (20%) at KOMA and
KLNK. While fog will remain patchy, can`t rule out a few
observations dipping into IFR to LIFR conditions in the
16/10-14Z timeframe.

Fog will improve after sunrise, with calm southeasterly to
southerly winds through the period. Scattered cumulus clouds
will develop around FL040-050 during the afternoon Thursday,
with an isolated rain shower possible (15% chance).

&&

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

&&

$$

DISCUSSION...Fortin
AVIATION...Wood