285 FXUS63 KLBF 090603 AFDLBFArea Forecast Discussion National Weather Service North Platte NE 103 AM CDT Tue Sep 9 2025
.KEY MESSAGES...
- Isolated thunderstorms are possible across north central Nebraska this evening, mainly areas along and east of Highway 83. A few thunderstorms could be strong, but the overall severe threat remains low.
- Elevated fire weather conditions are possible again on Tuesday for areas west of Highway 83. mostly driven by above average temperatures and low humidity.
- Temperatures remain warmer than average this week, with most days in the mid to upper 80s. Chances of rain are possible throughout the week, with better moisture possible this weekend.
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.SHORT TERM /THROUGH WEDNESDAY/... Issued at 221 PM CDT Mon Sep 8 2025
A surface trough is tracking across the Sandhills this afternoon, creating a sharp moisture gradient along the boundary. To the east of the boundary across portions of north central Nebraska, surface dewpoints are in the 60s. Relatively clear skies have allowed for a narrow tongue of surface based CAPE to develop across the region, providing sufficient instability for shower and thunderstorm activity this evening. As the surface trough tracks near the Highway 83 corridor, isolated thunderstorms are expected to fire along the boundary and track east late this afternoon and evening. Relatively marginal deep layer shear is available, generally on the order of 25 to 30 kts. While the environment is not overall the best severe weather set up, given the combination of ingredients, isolated showers and thunderstorms are expected this evening, with a few potentially strong thunderstorms. While the overall severe threat appears low at this time, cannot completely rule out a few of the stronger cells introducing a threat for small hail and strong winds.
Tomorrow, northwesterly flow aloft will continue to track wildfire smoke from the West Coast and British Columbia across the region. Those sensitive to smoke may want to take precautions tomorrow, as smoke is likely to mix to the surface.
Temperatures remain on the warmer side tomorrow, with widespread highs in the mid to upper 80s. West of Highway 83, afternoon relative humidity values drop into the 20 to 25 percent range. With the heat and low humidity, elevated fire weather concerns are possible again across western Nebraska. Keeping the threat somewhat limited, winds are expected to be fairly light out of the east to southeast, with occasional gusts up to 20 mph.
Tuesday night, another round of showers and thunderstorms will be possible across western Nebraska and the Sandhills as a low tracks across Kansas. Overall forcing across the region is weak, so expecting any shower and thunderstorm activity will be fairly scattered as it tracks across western Nebraska. Given that this is likely to be very scattered, will keep PoPs low for Tuesday night, generally less than 20 percent. Mostly cloudy skies should continue to keep overnight lows slightly warmer, with lows in the mid 50s to low 60s.
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.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... Issued at 221 PM CDT Mon Sep 8 2025
An upper level trough slowly tracks across the western United States, keeping us mostly in a ridge pattern. This will keep temperatures warmer than average through the end of the week. Daily highs remain mostly in the mid to upper 80s, with some locations breaking into the lower 90s. In fact, highs on Friday could be near 90 degrees for a good portion of the forecast region, especially along the HIghway 83 corridor. For reference, this is typically the time of year when our average highs begin to drop from around 83 degrees to 81 degrees.
With the trough remaining to the east, there should be sufficient upper level support for a few surface systems to introduce low end precipitation chances through the end of the week. Precipitation chances remain fairly meager however, generally less than 20 to 30 percent through the rest of this week. Ensembles further back this up, with both the GEFS and European ensembles showing a maximum of a 30 percent chance of one tenth of an inch of rain or better through the end of this week. Ensembles begin to show some better probabilities this weekend, as the upper level trough tracks further east. As this happens, a cold front is expected to track across the region, bumping our precipitation chances from 40 to 70 percent in the ensembles for one tenth of an inch of rain or better. The cold front is also expected to bring slightly more seasonal temperatures this weekend, potentially dropping highs back into the lower 80s.
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.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 100 AM CDT Tue Sep 9 2025
Areas of MVFR and IFR will develop across portions of central into southwest Nebraska early this morning. These conditions will linger until mid-morning when conditions will improve. All areas should be VFR by this afternoon. Isolated thunderstorms will be possible across the central Sandhills into the Panhandle by late afternoon. These may move eastward across the area during the evening hours.
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.LBF WATCHES/WARNINGS/ADVISORIES... None.
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SHORT TERM...Richie LONG TERM...Richie AVIATION...Taylor
NWS LBF Office Area Forecast Discussion