041
FXUS63 KGID 280302
AFDGID

Area Forecast Discussion
National Weather Service Hastings NE
1002 PM CDT Mon Jul 27 2026

...Short Term and Key Messages Update...

.KEY MESSAGES...

- Thunderstorm activity already ongoing across portions of the
  High Plains late this afternoon...still looking at the
  potential for activity to gradually drift east this evening-
  tonight into the forecast area. How the overall coverage ends
  up evolving still has some questions...may end up being fairly
  scattered in nature. Not out of the question some storms could
  be strong-marginally severe...with wind gusts near 60 MPH the
  primary hazard.

- Periodic storm chances continue on through the middle of the
  week (mainly during the evening-overnight hours)...and we
  finally get a break from the heat the past few days. Highs are
  more in the upper 80s-mid 90s Tue-Thu, with mid 80s-near 90
  Fri-Sun.

&&

.UPDATE...
Issued at 1000 PM CDT Mon Jul 27 2026

- Simply acknowledging the merciful end of the Extreme Heat
  Warning (which was allowed to expire at 10 PM):

Although it is still extremely humid across the area this
evening (dewpoints mainly 75-80), temperatures have fallen
enough that heat index values have slipped at least slightly
below 100 degrees in all areas. As a result, the Extreme Heat
Warning will be allowed to expire.

Although the next few days will be seasonably-warm, afternoon heat
index readings should mainly top out no higher than 90-100 degrees,
too low to warrant any additional Warnings or Advisories.

&&

.DISCUSSION...
Issued at 409 PM CDT Mon Jul 27 2026

Currently through tonight...

Outside of the brutal heat and humidity, overall quiet
conditions remain in place across the forecast area this
afternoon. Looking aloft, upper air and satellite data show
little change in the ridging dominating the pattern, centered
roughly over the OK/TX/CO/NM border area...keeping flow across
the Central Plains west-northwesterly. At the surface, an
overall weak frontal boundary has sunk south through the
area...currently stalled out from west- central KS northeastward
into southeast NE. This boundary hasn`t done much for
temperatures...with 3PM obs in the mid 90s to near 100, but
separating the more easterly winds to its north to the more
southerly winds to its south. Not surprisingly, moisture has
pooled along/north of this boundary...with nasty dewpoints in
the upper 70s to mid 80s across most of our Nebraska counties,
while a little more mixing is keeping dewpoints in our south in
the mid 60s-near 70. As a result, several automated sensors have
been showing heat index values more in the 115-120 degree range
at times. Obviously no changes made to the Extreme Heat Warning
that remains in place CWA-wide through 10PM this evening.

Off to the west-northwest over the High Plains, been seeing the
development of scattered thunderstorms this afternoon. Overall
subtle forcing aloft, along with upslope low-level flow to the
north across portions of SD and the frontal boundary across
western KS is helping with activity. The brutal heating is
allowing for steeper lapse rates and no shortage of instability
(SPC Meso page showing 3000-5000 j/kg of MLCAPE across the
region)...but deeper layer is shear is pretty low. Winds aloft
are not strong, so not seeing quick movement with any of this
activity...more just gradually drifting east with time.

This evening on through tonight...there remains the potential
for showers/storms to continue making their way east through
the forecast area. Precipitation chances remain pretty broad in
nature...models still showing some variation on just how much
coverage there ultimately ends up being. Not out of the question
that a few of these storms could be on the strong to marginally
severe side given the lingering instability...wind gusts near
60 MPH look to be the primary hazard, and the entire CWA remains
in the Day 1 Marginal Risk area.

Mid-Week...

For the Tuesday through Thursday time frame, overall no notable
changes in the forecast. Models show little change in the upper
level pattern, with the main upper level ridge axis continuing
to run roughly through the High Plains. There remain periodic
chances for showers and thunderstorms...mainly during the mid-
late evening and overnight hours...as models continue to show
the potential for shortwave disturbances riding around the edge
of the main ridging and sliding through the area. Precipitation
chances Tue evening-night and again Wed evening-night remain
generally in the 20-50 percent range...with models then showing
the potential for a stronger shortwave disturbance to dig
further south, with more widespread 40-60 percent chances Thu-
Thu night. Still plenty of details to iron out with the
timing/coverage of those chances.

More noteworthy for the mid-week period is models showing a
break from the heat from the past few days. Highs Tue-Thu are
forecast in the upper 80s-mid 90s...with heat index values more
in the 90s-near 100...vs the well above 100 from the past few
days.

Friday and on...

The forecast for Friday on into the weekend dries out...but will
see if that ultimately ends up panning out that way. The upper
level disturbance that moves through Thu-Thu night looks to
give the main ridge axis a better push back to the
west...leaving our area with more amplified north-northwesterly
flow. At this point models aren`t showing much in the way of
disturbances impacting the area. This shift in the ridging helps
keeps temps closer to normal for this time of year...generally
forecast to range from the mid 80s to near 90 through this
period.

&&

.AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 703 PM CDT Mon Jul 27 2026

For KGRI/KEAR Airports:
- General overview:
High confidence in VFR ceiling/visibility along with
rain/thunderstorm-free conditions through the vast majority of
the period. That being said, VFR cannot be "guaranteed"
throughout, and there are some potential aviation concerns:

-1) One or more rounds of showers/thunderstorms (possibly strong
 with gusty winds?) are possible overnight. Even at this close
 time range, there is still considerable uncertainty on "exact"
 timing and likelihood of occurrence. As with previous TAFS,
 have continued to highlight thunderstorm potential in PROB30
 groups, but have moved up the primary potential window of
 activity to 03-09Z KEAR/04-10Z KGRI. It`s certainly possible
 that spotty activity could linger beyond this...even into at
 least mid-morning Tuesday...but probability is too low to
 justify PROB30 at this time.

-2) Mainly brief/sporadic sub-VFR visibility/ceiling cannot be
 ruled out at times, with any sub-VFR visibility tied to
 possible heavier rain and/or mainly light fog, and any
 potential sub-VFR ceiling tied to thunderstorms or any "random"
 lower stratus that develop in their wake. At this time,
 confidence in occurrence is too low for any sub-VFR in TAFS.

- Winds:
The primary (but far from certain) concerns involves any
potential strong thunderstorm-outflow tonight. Have included
VRB30KT with aforementioned PROB30 groups, but there is a low
probability for severe-caliber gusts of 50+KT. Aside from any
thunderstorm-related outflow/influences, winds are a minimal
concern, with sustained speeds at-or-below 10KT at least the
vast majority of the period, and direction mainly varying
between some component of easterly or northerly.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...None.
KS...None.

&&

$$

UPDATE...Pfannkuch
DISCUSSION...ADP
AVIATION...Pfannkuch