The water at Harlan County Lake was busy with gulls.
Then the clouds built fast, the way they do on the Great Plains in early fall.
Within minutes, ice the size of golf balls was falling on the water and the shoreline at once.
Gulls resting on the lake had nowhere to hide.
People living nearby went out afterward and began picking birds up off the ground.
What makes a storm like that so dangerous to a bird caught in the open?
Why hail turns dangerous the moment a bird is caught in the open
A hailstone grows when an updraft inside a thunderstorm holds an ice pellet aloft, cycling it through layers of supercooled water until the stone finally gets too heavy for the storm to carry. A golf ball sized stone is heavy enough and fast enough to injure people and break windshields, and a bird’s skull offers far less protection than a roof or a car hood.
For a bird resting on open water, there is no tree canopy, no eave, no fence line to tuck beneath. That is the cruel timing of it. Waterfowl and gulls raft up on lakes in part because open water keeps ground predators at a distance.
But a storm cell moving over a reservoir turns that same openness into a falling ice field with nowhere to retreat. Birds in the air fare no better, because a wing strike can break the bones a long distance flier depends on.
A lake full of gulls and a sky that turned white
Harlan County Reservoir sits on the Republican River near the Kansas border, built by the Army Corps of Engineers for flood control. It is the second largest lake in Nebraska, holding 13,338 acres of surface water at full pool and offering about 75 miles of shoreline habitat that draws geese, ducks, pelicans and gulls in migration.
In early fall, Franklin’s gulls stage on reservoirs like this one in enormous numbers before continuing toward wintering grounds on the Pacific coast of South America, in Peru and Chile. They rest on the water in dense flocks between flights, sometimes tens of thousands at a time.
So when a severe cell rolled over Alma, Nebraska, it caught a resting flock in the open. Many people living around the lake went out as soon as the ice stopped falling, and found injured birds in the grass and along the beach.
What the rescue count actually showed
Nebraska Wildlife Rehab reported that more than 100 birds were severely injured or killed when golf ball sized hail hit Harlan County Lake at Alma on October 3, 2023, with area residents saving 54 Franklin’s gulls and one ring billed gull. Many others were already dead from head injuries or other trauma.
The center said its intensive care unit was then full of birds recovering from surgery on broken wings. That is a specific, countable record of something normally invisible.
Storms pass over staging lakes all the time, and almost none of it is tallied; this one was, because the lake has a town beside it and people willing to walk the shoreline afterward. The center’s later account of its year described caring for dozens of Franklin’s gulls from that single Alma hailstorm, a small number against a flock that can run into the tens of thousands but a real data point nonetheless.
A pattern severe storms share with other migrants
Hail does not discriminate by size of flyer. Severe storms along the same corridors can catch waterfowl, shorebirds and raptors moving ahead of a cold front, and they flatten whatever else is in the path, as in an Iowa hailstorm that destroyed crops across a wide swath of farmland.
The same atmospheric setup that concentrates birds over a lake or marsh, a front pushing through at the wrong moment, is the setup that produces the storm. A system that looks like routine autumn weather on a forecast map can leave an entire resting flock exposed.
That overlap is why migration pulses and severe weather watches so often describe the same afternoon over the same counties.
What the next storm may teach rehabbers
Recovery for an injured gull is not guaranteed even with surgery, since a broken wing bone in a bird built for a journey to South America has to heal straight enough to carry it thousands of miles. Birds found quickly stand a better chance simply because shock and exposure take their own toll on the ground.
Even so, the lake itself recovers almost immediately. Within a day the hail melts, the grass springs back, and new flocks settle on the same water as though nothing had crossed it.
Other sudden weather extremes show the same split, including a sudden deluge that flooded a desert city in hours and then drained away, leaving the landscape looking much as it had. That contrast, a reservoir that forgets within hours and a bird that may never fly straight again, is the arithmetic behind every hailstorm that crosses a flyway in migration season.
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