


Area Forecast Discussion
Issued by NWS Topeka, KS
Issued by NWS Topeka, KS
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956 FXUS63 KTOP 262320 AFDTOP Area Forecast Discussion National Weather Service Topeka KS 620 PM CDT Thu Jun 26 2025 .KEY MESSAGES... - Scattered thunderstorms expected this afternoon and evening. A few instances of damaging winds and locally heavy rainfall possible, but severe weather potential is low overall. - Warm and humid through Sunday. Sunday night cold front brings less humid and slightly cooler weather for next week. - Best rain and storm chances (50-70%) Sunday night with the cold front, otherwise small (10-30%) pop-up storm chances most afternoons. && .DISCUSSION... Issued at 157 PM CDT Thu Jun 26 2025 Surface observations this afternoon depict a weak area of low pressure across eastern Nebraska, with a weakening cold front extending southwest into central Kansas. Satellite observations are showing several bands of increasingly agitated cumulus ahead of and parallel to the front. Given a moist and mostly uncapped airmass, continued heating over the next hour or two should allow scattered thunderstorms to develop. Forcing does remain quite weak though, keeping confidence on the low end with regard to exact timing and coverage of convection. Regardless, the environment continues to be a very typical summer-time setup. Effective shear is weak, at less than 15 kts, instability is moderate (2000-2500 J/kg), and moisture content is high (PWAT 1.8-2.0"). Damaging winds with gusts up to around 60 mph will be the main severe hazard, though some small hail could occur with initial updrafts. Otherwise, as storms grow upscale, there could be some isolated areas that pick up a quick few inches of rain with a low-end flash flood risk. Generally though, the more scattered nature of convection and a slow but steady eastward progression will keep accumulations for most places around or below one inch. Some places in north-central KS likely won`t see anything. At any rate, any heavier storms will tend to clear east- central KS by late evening, though a few weaker showers may linger overnight. Whatever weak boundary that still exists by tomorrow will lift back north of the area as a broad zonal jet stream reestablishes itself over the Northern Plains. This will keep warm and humid conditions in place through the weekend. Highs climb into the 90s, lows stay in the 70s, with heat indices approaching 100. Given a continued moist airmass with only very weak CIN, can`t rule out an isolated shower or storm across much of the weekend. However without any front or upper shortwave to encourage ascent, most places will remain dry through Sunday afternoon. By Sunday evening and overnight, a front will push southeast across the area as an upper trough begins to amplify over the Great Lakes. This will increase shower/storm chances area-wide. Behind the front, slightly cooler and drier air will work in, with dewpoints dropping into the low/mid 60s by Tuesday afternoon. High temperatures look to be near seasonal averages, in the upper 80s, with low temperatures in the mid 60s slightly below average. Precipitation chances look lower into mid-week behind the front, though in a typical summer pattern like this it is difficult to discount PoPs altogether this far out. && .AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Issued at 617 PM CDT Thu Jun 26 2025 VFR at sites as line of storms continues to propagate eastward and away from terminals. Confidence is low-medium with the next round of TSRA as most guidance indicates sct TSRA forming along the front, impacting KTOP/KFOE in 05Z-07Z time frame. Inserted it as PROB30 with poor handling of models with this first round of TSRA. As the front passes through, winds weaken and become variable from 04-06Z remaining light through the remainder of the period. && .TOP WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Reese AVIATION...Prieto