


Area Forecast Discussion
Issued by NWS Omaha/Valley, NE
Issued by NWS Omaha/Valley, NE
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-- Discussion containing changed information from previous version are highlighted. --843 FXUS63 KOAX 101032 AFDOAX Area Forecast Discussion National Weather Service Omaha/Valley NE 532 AM CDT Thu Jul 10 2025 .KEY MESSAGES... - Strong to severe thunderstorms continue across the area this morning. Expect the storms to take a break before redeveloping later this afternoon or evening. - Severe storms remain possible on Friday afternoon and evening, too. - Temperatures cool slightly on Saturday before warming up Sunday through Tuesday. && .DISCUSSION... Issued at 400 AM CDT Thu Jul 10 2025 Water vapor imagery reveals a flattened ridge over the Four Corners region and quasi-zonal flow over the Intermountain West. A significant shortwave has lead to two separate MCSs combining into one line of storms over this CWA. This resultant QLCS has been producing severe gusts over the past hour or two as it pushes into an airmass with more buoyancy. Still, it continues south and east and is pushing past the borders of this forecast area. Also of note is the thunderstorm complex just south of the Elkhorn River in north-central Nebraska where guidance has consistent indicated thunderstorm development (check) and a drifting east over the morning hours (check). That may bring enough cloud-cover to play (temporary) spoiler for Thursday`s convection. .THIS AFTERNOON and TONIGHT... Global guidance and CAMs still produce convection tonight in what`s looking like another unstable atmosphere (SFC CAPE 2500-4000 J/kg). Hodographs, representing veering winds, look capable of producing supercells capable of large hail or a tornado early in the event. Regardless as to whether there are supercells ahead of the lee trof / shortwave, the significant forcing for ascent should be enough to initiate or expand coverage as storms grow upscale and the primary threat transitions to wind gusts. These storms will also produce heavy rain. WPC has issued a slight (15%) risk for excessive rainfall later tonight with the forecast development of a convective complex that pushes out of Nebraska and into Iowa. PWAT values of 1.5" will be common as southwesterly flow at H8 and H7 continue to pump moisture into the complex as it treks east late Thursday eve. Rainfall totals of 2-3" are possible, with best chances in western Iowa (10%). .FRIDAY... Thunderstorms are possible again on Friday with CAPE forecast to be high again (2,000 to 3,000 J/kg). Confidence in placement is low thanks to Thursday`s convection leaving boundaries strewn about. An H5 low should provide enough forcing for ascent to produce likely PoPs (50-80%). Expect highs (mostly 80s) to be a couple degrees cooler than today. .THE WEEKEND... Dry northwesterly flow at H5 sets the stage for an easy opportunity to get outdoors. Saturday looks pleasant with highs another step cooler (lower 80s) under partly cloudy skies and northerly winds of 5-15 mph. Sunday will be a bit warmer thanks to the southerly return flow. The next best chance of precipitation looks to be on Tuesday night as a surface low ejects out of the desert southwest and brings 50% PoPs to the CWA as it pushes northeast. Pattern recognition already points to a flash flood threat with this approaching system. This surface low will conspire with a positively tilted H5 trof working along the US/Canadian border to help change the overall pattern and allow cooler air to filter in from the north. By mid-week, highs are forecast to peak only in the 70s. && .AVIATION /12Z TAFS THROUGH 12Z FRIDAY/...-- Changed Discussion --Issued at 526 AM CDT Thu Jul 10 2025 VFR conditions are favored this morning before precipitation chances increase this afternoon. Southerly winds will increase above 12 kts by the afternoon, with midday gusts up to 25 kts. Precipitation chances through the period remain a bit uncertain. Scattered showers and thunderstorms will be possible (20% chance) through 19Z, with low confidence in their coverage. A chance for strong to severe storms moves in late in the afternoon and into the evening. Confidence is highest in impacts at KOFK by 23-02Z, though this time may be refined with future issuances. Confidence in timing and impacts at KOMA and KLNK remain low at this time and will be refined in future TAF issuances.-- End Changed Discussion --&& .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && $$ DISCUSSION...Nicolaisen AVIATION...Wood