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The Boston Globe

Nation

As twisters neared, alerts were sent in Illinois

Warning credited with saving lives despite cataclysm

WASHINGTON, Ill. — When a cluster of violent thunderstorms began marching across the Midwest, forecasters were able to draw a bright line on a map showing where the worst of the weather would go.

Their uncannily accurate predictions — combined with television and radio warnings, text-message alerts, and storm sirens — almost certainly saved lives as rare late-season tornadoes dropped out of the autumn sky.

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