


Area Forecast Discussion
Issued by NWS Topeka, KS
Issued by NWS Topeka, KS
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397 FXUS63 KTOP 140740 AFDTOP Area Forecast Discussion National Weather Service Topeka KS 240 AM CDT Mon Jul 14 2025 .KEY MESSAGES... - Thunderstorm chances return Tuesday night through Friday. - Afternoon heat indices in the upper 90s to around 105 likely Wednesday and this weekend. && .DISCUSSION... Issued at 240 AM CDT Mon Jul 14 2025 Weak flow will be the rule through Tuesday morning throughout the troposphere with the upper westerlies well north and weak surface high pressure in place. Will need to monitor visibility trends for fog potential in mainly eastern areas early today but the greater potential is well to the east. Little forcing for ascent and modest moisture keeps today and tonight dry. Moisture increases a bit Tuesday though anything more than an isolated peak heating storm is hard to envision. Showers and storms become more likely with time Tuesday night into Thursday. A few weak upper waves look to push east across Nebraska and the northern Plains Tuesday night and again Wednesday night, with some convection likely forming ahead of them in these areas both times. This should eventually bring a weak cold front into the area, more likely Wednesday night. Modest isentropic upglide will result from these waves though little saturation is present above the upglide so storm chances outside of a surface boundary moving in should keep coverage rather isolated. Somewhat better flow aloft (500 mb winds up to 30 kts) and MUCAPE around 2000 J/kg bring some concern for severe storms Wednesday night, and perhaps persisting into Thursday night with the boundary likely nearby. Chances should diminish Friday into the weekend with the front loosing its identity but PoPs near climatological values may linger through the weekend with a hot and humid airmass in place. Speaking of temperatures, weak WAA should support a warming trend into Wednesday though confidence in specifics falls off by then depending on convective trends. Dewpoints also rise as south winds take hold and could bring heat indices near 105 for some locations. After slightly cooler conditions near the front Thursday into Friday, south winds bring similar apparent temps back for the weekend. && .AVIATION /06Z TAFS THROUGH 06Z TUESDAY/... Issued at 1232 AM CDT Mon Jul 14 2025 Main challenge is chance for reduced visibilities in BR around sunrise. Light winds and clear skies will dominate, but crossover temperatures in the upper 50s to lower 60s are a few degrees below even the coldest guidance low temperatures, so visibilities below IFR are quite unlikely. Given consistency of guidance, some similar issues upstream Sunday morning, and scattered visibility reductions currently to the east, will go ahead with a MVFR BR for TOP and FOE. && .TOP WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Poage AVIATION...Poage