Max, Nebraska Weather Forecast Discussion

242
FXUS63 KGLD 182054
AFDGLD
Area Forecast Discussion
National Weather Service Goodland KS
254 PM MDT Thu Sep 18 2025
.KEY MESSAGES...
- Conditional potential for isolated thunderstorm development
  along/east of Hwy 83 late Friday aft-eve (~5-10 pm MDT). A
  severe storm capable of producing large hail is possible,
  should storms develop.
- Above average temperatures will return over the weekend, with
  highs in the mid 80`s on Sat-Sun.
&&
.SHORT TERM /THROUGH FRIDAY/...
Issued at 250 PM MDT Thu Sep 18 2025
Overview: A broad, complex upper level low over the Northern
Plains will slowly shift east toward the Upper Midwest tonight
and Friday.
Today: Shortwave energy over central KS at 18 UTC (per SPC
Mesoanalysis 400-250 mb Pot Vort) will progress E-ENE into east-
northeast KS this afternoon and evening. While cyclonic flow
aloft will remain in place over the region, subsidence in the
wake of the aforementioned shortwave will likely be sufficient
to suppress convective development Additionally.. a cool,
convectively overturned airmass will significantly hamper
diurnal destabilization this afternoon.. limiting
instability/MLCAPE to ~250 J/kg at peak heating. Expect little,
if any, potential for convection in the Goodland CWA.
Tonight: A compact upper low/wave in eastern MT at 18 UTC..
situated on the northwest periphery of the broader, complex
upper low over the Northern Plains.. will dig SSE into western-
southern SD by ~12 UTC Friday morning. Focused upper forcing
/DPVA/ with this feature may well aid in the development of
nocturnal convection ~06-12Z Friday morning -- over northeast WY
and southwest SD (150-200 miles N of the Goodland CWA). Expect
dry conditions and near average lows in the upper 40`s to lower
50`s.
Friday: The aforementioned upper wave in SD will dig SSE
through central and southeast Nebraska during the late morning
and early afternoon. Guidance suggests that low-level
convergence within.. and strengthening southerly flow on the
eastern periphery of.. a broad lee cyclone/trough in western KS
may aid in isolated convective development along and east of
Highway 83 during the late afternoon and early evening (~23-04
UTC, 5-10 pm MDT). Morning convection accompanying the upper
wave in central Nebraska may alter/influence environmental
conditions over southwest NE and northwest KS during the
afternoon.. lending a fair amount of uncertainty with regard to
whether or not (and if so, to what extent) convection may
develop. Output from current and recent runs of the HRRR and NAM
NEST suggest a conditional potential for an isolated supercell
capable of producing large hail.
&&
.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
Issued at 250 PM MDT Thu Sep 18 2025
Sat-Sun: Guidance suggests that a complex, disjointed synoptic
pattern characterized by (1) a sinuous, speedy northern stream
jet at higher latitudes in Canada and (2) a speedy, increasingly
sinuous southern stream jet along the southern Pacific Coast,
Desert Southwest and 4-Corners.. will prevail over North America
this weekend. While the Tri-State area will be in closest
proximity to (and more likely to be influenced by) the southern
stream jet.. a fractured branch of the northern stream jet
(manifesting as slow moving/nearly-stalled waves over the
Northern Plains) will no doubt introduce additional complexity/
uncertainty to the evolution of the upper level pattern (and
sensible weather conditions) over the Central Plains. Expect
increasing upper level cloud cover.. orographic cirrus, in
particular.. which may temper highs over western portions of the
area. Considerable uncertainty with regard to precipitation
chances.
Mon-Wed: Long range guidance suggests that a closed low will
develop over the central-northern Rockies or High Plains early
next week. If this is the case.. one would expect active/
dynamic weather. Below average confidence in forecast specifics.
Forecast confidence typically decreases with range. Below
average, in this context, is intended to communicate a further
reduction in confidence associated with /inherent-to/ increased
pattern complexity, e.g. patterns characterized by cut-off waves
and multi-branched jet/wave interactions, among other factors.
&&
.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1125 AM MDT Thu Sep 18 2025
GLD: MVFR ceilings (~2,500 ft AGL) in northeast CO at 17Z this
morning will drift southeast into extreme northwest KS early
this afternoon, potentially affecting the Goodland terminal
~18-20Z, though.. ceilings may lift above 3,000 ft AGL by that
time. Otherwise, VFR conditions are anticipated to prevail
through the TAF period. N-NNW winds at 10-15 knots may
occasionally gust to 20 knots this afternoon.. becoming
light/variable after sunset and persisting overnight. Winds will
shift to the SSW and increase to 12-17 knots a few hours after
sunrise and modestly increase to 15-20 knots during the late
morning, by the end of the 18Z TAF period.
MCK: VFR conditions are anticipated to prevail through the TAF
period. MVFR ceilings (~2,500 ft AGL) in northeast CO and
portions of the I-80 corridor in NE at 17Z this morning will
maintain a healthy distance (50+ miles) from McCook and lift
above 3,000 ft AGL by early-mid afternoon. N-NNW winds at 10-15
knots may occasionally gust to 20 knots this afternoon..
becoming light/variable after sunset and persisting overnight.
Winds will shift to the SSW and increase to 10-15 knots a few
hours after sunrise.. modestly increasing to 15-20 knots during
the late morning, near the end of the 18Z TAF period.
&&
.GLD WATCHES/WARNINGS/ADVISORIES...
KS...None.
CO...None.
NE...None.
&&
$$
SHORT TERM...Vincent
LONG TERM...Vincent
AVIATION...Vincent

NWS GLD Office Area Forecast Discussion