Lexington, Nebraska 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

303
FXUS63 KGID 061724
AFDGID

Area Forecast Discussion
National Weather Service Hastings NE
1224 PM CDT Tue Oct 6 2026

.KEY MESSAGES...

- Mostly dry, above-normal, forecast through the end of the
  week, with highs in the 80s through at least Wednesday
  (likely longer) and lows in the 50s.
- While confidence isn`t high, can`t completely rule out the chance
  of precip Wednesday night into Thursday morning and Thursday
  night into Friday morning.
- Breezy southerly winds return Friday through Sunday afternoons,
  with gusts up to 30-40MPH possible Saturday afternoon.
- Next meaningful chance of precipitation starts Sunday night,
  though model guidance continues to slow the arrival of this
  system (potentially not arriving until Tuesday).

&&

.UPDATE...
Issued at 145 AM CDT Tue Oct 6 2026

Light cirrus clouds drifting in amidst the pocket of vorticity
traveling in the NW flow aloft, thanks to a ridge developing
over the SW US and a trough to the east. While confidence is not
high enough to add into the official forecast, short term
ensemble guidance does highlight a 20-30% chance of patchy fog
development this morning, mainly along and west of a line from
roughly Ord to Cambridge. This fog would be mainly confined to
low lying areas and river valleys, including the Platte River
valley along I80. Otherwise, winds will be generally southerly
around 5-10 MPH, with lows in the 50s.

The rest of this week is expected to be dry, thanks to the
expanding upper level ridge mentioned previously. The one
exception to this dry spell is the slight chance of
precipitation Wednesday night into Thursday morning then again
Thursday night into Friday morning. However, confidence in
these precip chances are not overly high, given the weak forcing
amidst broad synoptic scale descent.

Above normal temperatures are expected through most of the
week, with forecast highs in near the 80s through at least
Wednesday and lows in the 50s, compared to climatological highs
around 70 and lows around 45. This warmer than normal weather
will likely continue into the weekend, as the EFI-SOT shows
signs of warmer than normal temps (particularly for the lows)
Saturday thru Sunday evening (though model guidance, including
the NBM that initializes the forecast, has struggled to grasp
the warmer temps).

Breezy southerly winds return Friday through Sunday afternoons.
Southerly winds will be around 15-20 MPH, with wind gusts up to
25-30 MPH Friday afternoon, increasing to 30-maybe even 40 MPH
Saturday afternoon, and 30-35MPH Sunday morning/afternoon.

Next meaningful chance of precipitation starts Sunday night
through the end of the forecast period, as a trough approaches
from the west coast. However, uncertainty remains in the depth
and timing of the upper-level pattern, as model guidance
continues to slow down the arrival of this system (potentially
not arriving until Tuesday).

&&

.DISCUSSION...
Issued at 302 PM CDT Mon Oct 5 2026

-- FORECAST CHANGES OF NOTE/BIG PICTURE COMMENTS/PRIMARY
 UNCERTAINTIES:

- As already touched on/alluded to in the KEY MESSAGES above,
  our three biggest forecast issues/uncertainties for the 7-day
  forecast as a whole are:

1) Could some spotty/sneaky shower/thunderstorm activity "ruin"
what had been/has been a MOSTLY dry forecast between late Wed
night-Thurs night? As of now, we have maintained a dry forecast
for the vast majority of our forecast area (CWA), but this bears
watching just in case there is enough lift/instability to
generate at least spotty activity. Right now the NAM is the
main primary model suggesting these chances, while the ECMWF and
especially GFS/RRFS are less supportive.

2) How far might we be underdoing (aiming too cool) on high
temps especially Friday-Sunday? As we`ve clearly seen over the
last 3-4 days, our "default" multi-model blend (NBM) has really
been struggling to go warm enough in this recent sunnier/drier
air weather pattern, and more "raw" deterministic model data and
"old school" numerical guidance strongly suggests that our
official forecast is quite possibly AT LEAST 5 degrees too cool
for Fri-Sun, as we seem primed to see more 80s vs. 70s
(especially Fri-Sat). While we proactively adjust NBM temps
especially in the shorter term (first few days), these periods
are still a bit too far out in time for us to have much control
over making adjustments, so for now this forecaster considers
it a likely forecast weakness.

3) Although still too far out in time (6-8 days) to even begin
thinking about providing "finer details", eventually we could
see a return of more legitimate rain chances as a large-scale
western U.S. low pressure system/trough emerges into the
central states. As has been seen countless times in the "model
world" over the years, the GFS is noticeably faster with the
arrival of rain/possible thunderstorm chances (perhaps as soon
as Sun night-Monday), while the slower (and often more accurate)
ECMWF solution holds off rain/thunderstorm chances until more so
Tuesday-Wednesday. As is typical, our current official forecast
is a "middle ground" with rain chances arriving already Sun
night-Monday, but only "iffy" 20-30% chances.


-- 7-DAY FORECAST CHRONOLOGICAL DETAILS (through Mon. Oct. 12, but
 heavily focused on these first 3-4 days):
- CURRENT/RECENT WEATHER SCENE AS OF 2 PM:
Although certainly on the breezy side with sustained southerly
winds commonly 12-22 MPH/gusts 16-32 MPH (lightest in our
east/strongest in our central/west), it`s another virtually
cloudless/sunny day with high temps on track to top out 77-79
most places, with a mainly southwestern spots probably tagging
80 briefly.

In the mid-upper levels, water vapor satellite/short-term model
data confirm that our Central Plains region resides under broad
west-northwesterly flow...directed between ridging over the
southwestern U.S. and a large upper low/trough over southeastern
Canada. At the surface, our breezy south winds are being driven
by a tightening pressure gradient behind a surface high pressure
axis centered over the eastern Midwest/Great Lakes (and that was
over us 24 hours ago), and a High Plains lee trough to our west.


- THIS EVENING-OVERNIGHT:
As benign northwesterly flow aloft persists, skies remain mostly
clear and the forecast remains guaranteed dry. At the surface,
breezes slacken from this afternoon`s speeds, but remain
generally southerly with sustained speeds commonly 5-15 MPH
(overall-lighest in our far west toward sunrise in our far west
toward sunrise as a weak trough axis/more westerly wind shift
arrives). Literally the only possible "forecast issue" is for a
narrow axis of least light/patchy fog to develop for a few hours
along this trough axis primarily within Dawson County in our far
west. Although this is something to keep an eye on, right now
this appears to be a very limited concern for us (both
likelihood of fog being truly dense and overall areal
coverage...affecting only a fraction of our CWA at most). Low
temps were nudged down very slightly, with mid-50s most
places...and typical cooler spots (especially
Valley/Greeley/Dawson counties) more so low 50s.


- TUESDAY DAYTIME:
Although there will probably be a bit more in the way of high
level cirrus drifting through here and there, the day will be
dry and no worse than mostly sunny as a whole, under continued
moisture-starved northwesterly flow. Compared to today, it will
be several degrees WARMER but also LESS WINDY (a somewhat
unusual combination for the fall season where warmer days often
feature more wind). In short, the warmer airmass is advected in
from the southwest/west/northwest...while the lighter winds will
be due to a weaker pressure surface gradient. In fact, there is
some uncertainty regarding "exact" wind direction through the
day, as while speeds should generally only be around 10 MPH,
direction will probably favor southwesterly in roughly the
southeastern half of our CWA, while northern/western counties
will probably turn more northerly behind a weak boundary. No
matter what, highs are forecast to climb a solid 5-8 degrees
warmer than today...most areas aimed between 83-87.


- TUESDAY NIGHT:
Dry conditions persist, as a weak boundary gradually turns light
winds to northerly and/or northwesterly as the night goes on.
Like tonight, models (such as HRRR/RAP) at least weakly suggest
that patchy fog could again develop late, but this time mainly
in our far southeast counties where winds will be lightest
toward sunrise (confidence too low for forecast introduction at
this time). Low temps aimed similar to tonight most places (mid
50s), but a somewhat higher chance for upper 40s far north/west-
central.


- WEDNESDAY-WED NIGHT:
High confidence dry continues through the day and through at
least the evening (through midnight). Daytime breezes again
fairly light (around 10 MPH with some slightly higher gusts),
but this time shifting from northerly to more easterly as
surface high pressure passes to our north-through-east. High
temps slightly cooler than Tuesday, with mainly upper 70s most
Neb zones but still low-mid 80s along near and especially south
of the KS border.

For late Wed night, the 12Z NAM (and to a lesser extent 12Z
ECMWF) suggest some spotty showers/weaker thunderstorm activity
COULD try developing along a weak low-level jet, but with a
predominantly dry signal in other models have kept our forecast
dry at this time (SPC is carrying some generic "general thunder"
chances for our northern CWA at this time). Low temps again
mainly mid 50s most areas.


- THURSDAY-FRIDAY:
For Thursday daytime-night, we still cannot totally rule out
spotty/weak convection, but our official forecast remains
largely dry with somewhat higher chances focused mainly to our
north-through-east. Temperature-wise, Thursday is a one-day
slight cool-down (even if it stays dry), with highs more so mid-
upper 70s most areas, but as southerly breezes return Friday
strongly suspect our going highs also in the mid-upper 70s are
likely several degrees too cool (look for these to trend up in
later forecasts).


- SATURDAY-MONDAY:
No point here in rehashing in length what has already been
discussed above. In short, most of this time frame likely
remains dry, breezy and several degrees warmer than our current
official forecast suggests...especially if the slower/currently
preferred ECMWF evolution of the western U.S. trough comes to
pass.

&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1223 PM CDT Tue Oct 6 2026

For KGRI/KEAR Airports:

VFR conditions are expected throughout the TAF period. Light
southwesterly winds at KGRI calm during the evening hours. Winds
at KEAR and KGRI remain light and variable until after sunrise
tomorrow when light northerly winds begin to kick in. Skies are
expected to remain clear or with few clouds throughout the TAF
period.

&&

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

&&

$$

UPDATE...Scott
DISCUSSION...Pfannkuch
AVIATION...McGrew