471 FXUS63 KTOP 151726 AFDTOPArea Forecast Discussion National Weather Service Topeka KS 1226 PM CDT Mon Sep 15 2025
.KEY MESSAGES...
- The pattern remains active today through the end of the week with daily chances for showers/storms. Best chances (60-75%) come Wednesday into Thursday.
- Warm through Wednesday, then temperatures trend back to near- normal through the end of the week with highs in the upper 70s to low 80s.
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.DISCUSSION... Issued at 203 AM CDT Mon Sep 15 2025
Negatively-tilted trough continues to lift northeast across the Dakotas with a trailing shortwave moving through northeast Kansas. Isolated to scattered showers persist over eastern areas, but should dissipate this morning with dry time dominating most of the daytime hours. Deep mixing and clearing skies will allow temperatures to warm above normal again into the upper 80s and low 90s. There is a small chance (15-20%) for a pop-up shower or storm this afternoon given an uncapped and unstable airmass, but a lack of forcing will keep any activity isolated. The pattern remains stagnant for Tuesday and nearly a carbon-copy of today is expected. A subtle wave moving through the flow leads to slightly higher chances (20-30%) for showers and storms Tuesday afternoon, mainly across eastern Kansas.
Better chances for showers and storms come Wednesday into Thursday as a stronger shortwave ejects across the Northern and Central Plains and a surface front moves into the area. The overall severe potential is low thanks to weak shear, but can`t rule out a few stronger storms during this timeframe. The aforementioned shortwave becomes cutoff and Fujiwharas around another shortwave that dives south across the northern Rockies. The cutoff low meanders across the Northern and Central Plains through Saturday before finally shifting off to the east. Passing waves rounding the cutoff energy will support rounds of precipitation through Saturday, but it will not be a complete washout. Temperatures trend back near climatological norms by Thursday with highs in the mid 70s to near 80 degrees through the weekend.
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.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1226 PM CDT Mon Sep 15 2025
VFR conditions are forecast. Southerly winds may briefly reach 10 kts on occasion this afternoon, but should remain under that for the most part. Otherwise, can`t rule out an isolated pop-up shower or storm in the area this afternoon as well, but chances are far too low to mention in the TAFs.
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.TOP WATCHES/WARNINGS/ADVISORIES... None.
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DISCUSSION...Flanagan AVIATION...Picha
NWS TOP Office Area Forecast Discussion