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A persistent omega block fuels extreme weather over Texas<\/strong><\/p>\n An unusually stable atmospheric setup<\/strong>, known as an omega block<\/strong>, is locking a potent storm system<\/strong> over the central United States<\/strong>, triggering widespread heavy rain<\/strong>, dangerous flooding<\/strong>, and severe thunderstorms<\/strong> across Texas<\/strong> and the Great Plains<\/strong>.<\/p>\n <\/p>\n What is an omega block and how it impacts weather<\/strong><\/p>\n The term omega block<\/strong> refers to a jet stream pattern<\/strong> shaped like the Greek letter \u03a9 (omega)<\/strong>. This configuration causes high pressure<\/strong> to stall over the northern Plains<\/strong>, while low-pressure systems<\/strong> become lodged on either side \u2014 one to the west<\/strong>, and one to the east<\/strong>. These stuck systems<\/strong> can persist for days<\/strong>, leading to repetitive rounds of storms<\/strong> in areas under the influence of the lows.<\/p>\n This week, that means Texas<\/strong> sits within the zone of instability<\/strong>, as the blocking pattern shifts eastward<\/strong>, nudging moisture-laden storm systems<\/strong> over the Lone Star State<\/strong>. These storms are interacting with already saturated ground<\/strong> from late April rains<\/strong>, amplifying the risk of flash flooding<\/strong>, especially in low-lying areas<\/strong> and near rivers<\/strong>.<\/p>\n <\/p>\n Tornado and severe thunderstorm watches issued<\/strong><\/p>\n As of Tuesday morning<\/strong>, the National Weather Service<\/strong> has issued a tornado watch<\/strong> effective until 4 p.m.<\/strong> for a large swath of Central Texas<\/strong>, encompassing Fredericksburg<\/strong>, Waco<\/strong>, Houston<\/strong>, and San Antonio<\/strong>. Earlier warnings<\/strong> for Gillespie<\/strong> and Blanco counties<\/strong> expired at 8 a.m.<\/strong>, but officials continue to monitor conditions closely.<\/p>\n Meanwhile, the Dallas-Fort Worth<\/strong> metro area, extending westward to Abilene<\/strong>, is under a severe thunderstorm watch<\/strong> until 10 a.m.<\/strong>, though strong to severe storms<\/strong> are still likely into the afternoon hours<\/strong>.<\/p>\n <\/p>\n Threats include:<\/strong><\/p>\n <\/p>\n Rain continues through midweek<\/strong><\/p>\n This entrenched pattern, established in the wake of an already wet end to April<\/strong>, is forecast to linger through Wednesday and Thursday<\/strong>, with clearing expected by the weekend<\/strong>. Forecast models indicate several more inches of rain<\/strong> could fall in the hardest-hit zones, placing parts of Central and East Texas<\/strong> at an elevated risk of urban and small stream flooding<\/strong>.<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" A persistent omega block fuels extreme weather over Texas An unusually stable atmospheric setup, known as an omega block, is locking a potent storm system over the central United States, triggering widespread heavy rain, dangerous flooding, and severe thunderstorms across Texas and the Great Plains. What is an omega block and how it impacts […]<\/p>\n","protected":false},"author":17,"featured_media":2427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2426","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"yoast_head":"\n\n