377 WGUS54 KEWX 211346 FFWEWX TXC491-211715- /O.EXT.KEWX.FF.W.0011.000000T0000Z-260421T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Austin/San Antonio TX 846 AM CDT Tue Apr 21 2026 The National Weather Service in Austin/San Antonio has extended the * Flash Flood Warning for... Central Williamson County in south central Texas... * Until 1215 PM CDT. * At 846 AM CDT, Emergency management reported 16 low water crossings are closed due to flooding throughout Williamson County. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Emergency management reported. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Round Rock, Georgetown, Taylor, Serenada, Leander, Hutto, Liberty Hill, Jarrell, Florence, Thrall, Weir, Georgetown Dam, Sun City, Andice, Coupland, Jonah, Walburg, Theon, Waterloo and Seward Junction. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely. && LAT...LON 3058 9768 3067 9797 3087 9780 3061 9724 3048 9735 FLASH FLOOD...OBSERVED FLASH FLOOD DAMAGE THREAT...CONSIDERABLE $$ MM