Area Forecast Discussion
Issued by NWS Omaha/Valley, NE
Issued by NWS Omaha/Valley, NE
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472 FXUS63 KOAX 151655 AFDOAX Area Forecast Discussion National Weather Service Omaha/Valley NE 1155 AM CDT Sun Sep 15 2024 .KEY MESSAGES... - Temperatures are expected to remain above-normal through the work week with highs in the 80s. - Nightly low-end chances for showers and thunderstorms (20 percent) will move into eastern Nebraska Sunday and Monday night. Most of the area will stay dry. - Periodic chances for more widespread showers and thunderstorms move into the area Tuesday night and continue into early next weekend. && .DISCUSSION... Issued at 155 AM CDT Sun Sep 15 2024 Short Range (Today and Monday) As of 1:30 AM, ongoing showers and thunderstorms are moving across north-central Nebraska, forced by a moist low level jet. The bulk of the storms should pass through Knox county, leaving 35 percent PoPs across our far northwestern counties before tapering off early this morning. Another morning of fog development is possible, though winds increase to 15-25 kts above the surface. This will restrict any fog to remaining patchy. The day will break to mostly clear skies and highs in upper 80s. Another day of strong southerly winds will continue this steak of highs 5 to 10 degrees above the climatological average. A weak shortwave pushing across central Nebraska Sunday night will bring another chance for showers and storms. The better forcing will remain in central Nebraska, PoPs remain near 25 percent for our western counties into Monday morning. By the start of the work week, an upper level trough will continue to build across the western CONUS and bring increasingly southwesterly flow to the area. Monday will bring another day with highs in the mid to upper 80s before another low-end overnight precipitation chance. Similar to the previous night, the better forcing remains over central Nebraska, though 20 percent PoPs remain over our western counties. Long Range (Tuesday and Beyond) Above average highs (mid 80s) will continue through the work week as we move into a more active pattern. The aforementioned upper level trough will progress eastward with the trough axis situated over the Rocky Mountains by late Tuesday/early Wednesday. This will bring periodic chances for showers and thunderstorms. A surface cold front pushing through Tuesday night into Wednesday will bring PoPs of 55 to 75 percent to much of the area. Thursday and Friday will bring additional precipitation chances (PoPs 30 to 60 percent) as shortwave features traverse the area. Better forcing will also arrive during the latter half of the work week, bringing some low-end severe weather potential. There is still plenty of time to work out the details of this possibility. The CSU Machine Learning guidance begins to highlight eastern Nebraska for severe weather potential (5 percent) Wednesday through Friday. A cold front pushing through early Saturday looks to drop next weekends highs into the low to mid 70`s. This front will also bring 60 percent PoPs to much of the area into Saturday. && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1155 AM CDT Sun Sep 15 2024 VFR conditions will prevail through the forecast period with some potential for a few showers and thunderstorms (20-30% probability of occurrence) in the vicinity of KOFK after about 12z Monday. Otherwise, south winds of 12-14 kt are forecast this afternoon at all terminal locations with gusts up to 20 kt possible at KOFK. The winds will diminish below 12 kt by this evening. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && $$ DISCUSSION...Wood AVIATION...Mead