Hydrometeorological Discussion
Issued by NWS
Issued by NWS
198 AGUS74 KWCO 011500 HMDNWC National Hydrologic Discussion - EXPERIMENTAL NWS National Water Center - Tuscaloosa AL 1015 AM CDT FRI AUG 1 2025 .Synopsis... Flash and arroyo flooding continues for New Mexico... Isolated flooding may occur in portions of Montana... Isolated flooding possible in the Southeast and Puerto Rico and the U.S. Virgin Islands... Flooding possible in American Samoa... Isolated river flooding continues in Iowa... .New Mexico... Flash and arroyo flooding is possible in parts of New Mexico due to additional thunderstorms with high rainfall rates in the vicinity of a stalled boundary. Burn scars and urban areas pose a significant risk of flooding impacts, with the potential for debris flows near recently burned areas. .Montana... Scattered thunderstorms this afternoon and evening may bring flooding impacts across portions of Montana. Slow storm motions and higher rainfall rates could locally overwhelm infiltration capacity, leading to excess runoff. Impacts will be mostly likely confined to urban areas, poor drainage areas, and near burn scars. .Southeast... Daily rainfall is expected through day 5 (Tue) as a frontal boundary slowly moves southward. Most flooding impacts may be mitigated due to sandy and generally dry initial soils. Conditions will saturate through the event, allowing isolated flooding impacts to be possible, especially in urban areas. .Puerto Rico and U.S. Virgin Islands... Isolated flash, urban, and small stream flooding is possible across the islands through day 4 (Mon) as a tropical wave crosses the islands starting late on day 1 (Fri). .American Samoa... A nearby trough will bring potential flooding through day 1 (Fri). Landslides will also be possible in areas of steep terrain. .Iowa... Isolated moderate to major river flooding from recent rainfall will persist through early next week across east-central Iowa on portions of the Iowa and Wapsipincion Rivers as water routes downstream. //JAW $$