textproduct: North Platte

KEY MESSAGES

- Elevated fire weather weather concerns Friday afternoon.

- Isolated thunderstorm chances Friday morning/evening and again Saturday.

- High pressure aloft to the southeast will promote warmer temperatures much of next week though precipitation chances will persist.

SHORT TERM /THROUGH SATURDAY/

Issued at 135 AM CDT Fri Sep 4 2026

The main concerns will be thunderstorm chances this morning and an isolated chance tonight. Along with thunderstorm chances on Saturday. Elevated fire weather concerns are also possible Friday afternoon. A weak boundary across portions of northern Nebraska will be the focus for thunderstorm chances this morning. A few of the CAMs have hinted at the early morning convection being confined mostly to the northwest Sandhills. Confidence is low in convection initiation, especially with limited moisture, thus kept PoPs confined generally around 15 percent. There is the potential could see some shower/thunderstorm activity this evening as well generally across our far eastern portion of the CWA, but at this time, the better environment looks to be east into central Nebraska.

As for Friday elevated fire weather concerns, generally for areas west of HWY 83 where drier air will be in place and min RH will range near 25 to 30 percent. Winds will also be breezy out of the southeast around 15 to 20 mph sustained and gusts around 30 mph or greater, however the corridor where the strong winds around 20 mph sustained and up to 30 mph wind gusts, will generally be HWY 83 and eastward, thus east of the area with the lower RH.

As for Saturday a SW trof will move eastward into Nebraska. MU CAPE values will range from around 1500 to 2000 J/kg in the afternoon. At this time thunderstorm coverage during the day will remain mostly isolated, but heading into the evening and overnight hours may become more scattered to widespread as the LLJ strengthens.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/

Issued at 135 AM CDT Fri Sep 4 2026

Saturday Night...Ridge axis will sit immediately east of the local area with prominent southwesterly flow across the spine of the Rockies and spilling onto the High Plains. A subtle shortwave will lift north and east as it crosses overtop the dome of high pressure aloft situated across the southern Plains. This feature will interact with moderate to strong instability and ample moisture as PWATs exceed 1.25" for much of the area. Weak shear should preclude a greater threat for severe weather but locally heavy rain will be possible. Forecast soundings depict skinny instability within a highly saturated profile where mid-level RH is near 80%. Mean winds in the cloud layer peak around 18 knots and with a strengthening LLJ late, moisture advection and relatively slow storm motions could lead to some locally heavy rain concerns. Deterministic solutions, particularly the GFS/ECMWF synoptic models, depict fairly expansive coverage of 0.50" or greater QPF. Ensemble solutions back this up with reasonable coverage of 50% or greater potential to exceed 0.10". Typically, ensembles do not resolve thunderstorm rainfall intensity well so feel this is probably underdoing the potential a bit. Further evaluation of higher percentile output shows the potential ceiling better with 90th percentile output showing 0.50- 0.75"+ across the area.

Sunday and beyond...upper flow will flatten as longwave trough moves ashore the Pacific Northwest. Multiple lead impulses will traverse the southwesterly flow across the northern and central Rockies with glancing blows to western Nebraska. This will favor continued rain and thunderstorm chances early in the week. This will peak around the Sunday and Monday evening timeframe as the lead-up to and eventual frontal passage should lead to more widespread rain and thunderstorm potential. Current PoPs each evening climb to around 50- 70% but NBM QPF probabilities show greater confidence in Monday evening where potential for > 0.25" surpasses 30%. As strong troughing begins to translate west to east across southern Canada, ridging over the Southeast CONUS will retrograde with increasing height anomalies (potentially exceeding 2 sigma) over southern Nebraska. The ECMWF Extreme Forecast Index highlights greatest temperature anomalies over the lower Missouri/Mississippi Valleys, closer to the center of high pressure aloft. Even with that said, temperatures should largely favor above normal values through the extended period with highs remaining in the 80s to lower 90s (roughly 5-10, perhaps 15F above normal any one day). Placement of ridge axis by late week varies notably between mid-range guidance. This will have profound implications on the extended forecast with the difference being general zonal flow or southwesterly flow, the latter of which would be more favorable for rain potential. Until guidance can hone in on a more precise outcome, confidence in precise details beyond Day 5 will remain low.

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 619 AM CDT Fri Sep 4 2026

VFR conditions are expected through the forecast period.

As suspected, shallow fog is crept up the Platte Valley from central Nebraska. Local observations show very minor visibility reductions but this will be largely transient in nature given rapid improvement at KLXN. Because of this, will omit from the TAF. Convection across the Panhandle continues to lift north and will miss the VTN terminal. Further south, satellite shows an area of accus over northwest Kansas and this area is likely to produce isolated showers and general thunderstorms through the morning. High resolution guidance hints at any activity coming from this region lifting north and east. This should keep impacts to the southeast of LBF but trends will be monitored. Gusty winds this afternoon with peak around 20 to 25 knots out of the south. Some LLWS will envelope VTN but should wane prior to the end of the period with clearing skies.

LBF WATCHES/WARNINGS/ADVISORIES

None.