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AGUS74 KWCO 201950
HMDNWC

National Hydrologic Discussion - EXPERIMENTAL
NWS National Water Center - Tuscaloosa AL
200 PM CST THU NOV 20 2025

...Isolated flash, urban, and arroyo flooding possible from Southern
California into Arizona through the weekend ...Locally considerable flash
flooding possible in portions of TX through the rest of today, with
additional flooding impacts possible starting on Sunday... Flash flooding
possible in American Samoa through Saturday...

.Southern California into southern Arizona...
Additional rounds of showers and thunderstorms will impact the region and
continue to bring the threat of isolated flash and urban flooding impacts
through the weekend. Highest rainfall rates and totals will be in the
favorable upslope areas. Flash flooding and debris flows will also be
possible near recently burned areas.

.Southern Plains into the Ozarks...
Moderate to heavy rainfall persists across parts of the region today,
bringing the threat for locally considerable flash and urban flooding,
particularly in the TX Hill Country, with isolated flooding possible
elsewhere. The threat of flash, urban, and small stream flooding returns
starting Sunday as additional rainfall is forecast. River ensemble guidance
(HEFS) also indicates the possibility of isolated river flooding.

.American Samoa...
Flash flooding will be possible across the islands in response to heavy
rainfall.

//JAW

Additional National Water Center products are available at
www.weather.gov/owp/operations

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