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5d ago

Stalled Omega Block Drives Severe Storms, Flooding, and Fire Risks Across Central U.S.

A rare atmospheric pattern is prolonging severe weather, with flash flooding, large hail, and fire dangers impacting multiple states through midweek.

Water vapor imagery revealed an Omega Block pattern setting up across the country May 5,2025, according to the National Oceanic and Atmospheric Administration.
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Storm clouds gather during a game between the Washington Nationals and the Cincinnati Reds in the fourth inning at Great American Ball Park on May 4, 2025, in Cincinnati.

Overview

  • A slow-moving storm system, anchored by an Omega Block, is bringing severe thunderstorms, flash flooding, and fire risks to the Plains and the South through Wednesday.
  • Flood watches are in effect for northern New Mexico and the Texas and Oklahoma panhandles, while red flag warnings persist in parts of Arizona, New Mexico, and the northern Plains.
  • The Storm Prediction Center has elevated severe weather risks in West Texas and the Panhandle, warning of hail over 2 inches in diameter, damaging winds, and isolated tornadoes, especially near Lubbock and Fort Stockton.
  • Flash flood concerns are significant across Southeast Texas, Louisiana, and Mississippi, with rainfall totals of 1–3 inches forecast and higher amounts possible near Beaumont.
  • The Omega Block pattern, an unusual atmospheric setup, is prolonging storm impacts and compounding risks in areas already saturated or prone to drought.