Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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355 FXUS63 KOAX 200005 AFDOAX Area Forecast Discussion National Weather Service Omaha/Valley NE 705 PM CDT Wed Jul 19 2017 .SHORT TERM...(Tonight through Saturday) Issued at 336 PM CDT Wed Jul 19 2017 Hot dome of high pressure aloft remains centered over the Central Plains with strong zonal flow over the Northern plains. An MCS continues to move southeast across southwest Minnesota this afternoon. Otherwise, a slow moving front extends east across eastern South Dakota from low pressure centered over southwestern South Dakota. The ongoing MCS has complicated the surface pattern slightly, but as the low continues to slowly sink south, convection continues to bubble over south central SD. Some eluted severe thunderstorms look possible given moderate instability and 30-40kts of 0-6km bulk shear. Should this activity continue east/southeast as CAMs suggest, a couple of our northern counties could see isolated thunderstorms through the evening hours with hail and damaging winds the primary hazards. Otherwise hot and humid conditions continue with surface dewpoints well into the 70s and temperatures topping out in the 90s. Models have been under-forecasting late afternoon/early evening dewpoints as of late and so have adjusted forecast for next few days accordingly. Heat advisory/excessive heat headlines will continue as is through Friday. .LONG TERM...(Saturday night through Wednesday) Issued at 336 PM CDT Wed Jul 19 2017 By Saturday the ridge will flatten out and cool temps down slightly. Model blends do give us a few hit and miss chances for low pops with best chance most likely late Sat night into Sun across southeastern Nebraska. Otherwise upper ridge looks like it will build back into the area next week. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 704 PM CDT Wed Jul 19 2017 A thunderstorm complex over north-central NE as of 00z has remained quasi-stationary for the last hour, perhaps owing to stronger capping to the east. Latest short-range model guidance continues to insist that storms will develop across portions of northeast NE this evening. As such, have include a VCTS mention at KOFK. Overnight, the development of a LLJ will contribute to LLWS criteria being met at all three TAF sites. Otherwise, expect VFR conditions to prevail. The exception would be if thunderstorms were to affect KOFK later this evening. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...Excessive Heat Warning until 8 PM CDT Friday for NEZ034-044-045- 050>053-065>068-078-088>093. Heat Advisory until 8 PM CDT Friday for NEZ011-012-015>018- 030>033-042-043. IA...Excessive Heat Warning until 8 PM CDT Friday for IAZ055-069-079- 080-090-091. Heat Advisory until 8 PM CDT Friday for IAZ043-056. && $$ SHORT TERM...Kern LONG TERM...Kern AVIATION...Mead is the U.S. government's official web portal to all federal, state and local government web resources and services.