5-17-26 NWS Dss
Strong to severe thunderstorms are expected to develop after 4 PM, initially across northeast Nebraska before spreading south and east.
Large hail (2+ inches), damaging wind gusts, and a few tornadoes (possibly strong) are the expected hazards. Heavy rain from several storms moving over the same area may raise concerns about flash flooding.
Additional strong to severe storms are forecast for Monday afternoon, with an increased threat for large hail (2-4+ inches) and strong tornadoes.
Additional chances for heavy rainfall on top of what has already fallen since Friday night will result in a potential for flash flooding, particularly for portions of southeastern Nebraska. The chances of seeing severe storm activity are highest over southeast Nebraska.
…FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH TUESDAY MORNING…
* WHAT…Flash flooding caused by excessive rainfall is possible.
* WHERE…A portion of southeast Nebraska, including the following counties: Gage, Jefferson, Johnson, Lancaster, Nemaha, Otoe, Pawnee, Richardson, Saline, and Seward.
* IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded.
* ADDITIONAL DETAILS...
– Several inches of rain have fallen across portions of Southeastern Nebraska. Additional rainfall is expected through Tuesday morning, with 1 to 3 additional inches.
– Flood Safety Tips are available here
Monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Updated information from the National Weather is available here