
Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >
New connectivity allows dissemination of Non-Weather Emergency Messages (NWEMs) from external providers and Local Storm Reports (LSRs) that were generated using the latest NWS software update.