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AGUS74 KWCO 032003
HMDNWC

National Hydrologic Discussion - EXPERIMENTAL
NWS National Water Center - Tuscaloosa AL
200 PM CST WED DEC 3 2025

Isolated flash and urban flooding possible across portions of Louisiana
Thursday... Urban and river flooding possible early next week in portions
of the Pacific Northwest...

.Louisiana...
Periods of moderate to locally heavy rainfall will return to portions of
the Gulf Coast Region and Southeast, bringing an isolated potential for
flash and urban flooding across southern LA through Thursday. Shifts in the
extent and amounts of forecast QPF has reduced the overall confidence in
flooding impacts. However, isolated pluvial ponding and standing water in
typical flood-prone and urban areas remains possible, with the greatest
potential in urban areas along the I-10 corridor.

.Pacific Northwest...
A series of showers from an ongoing atmospheric river is forecast across
the Pacific Northwest (western WA/OR) through the week with the heaviest
totals expected by early next week. An active start to the year has caused
soils and streams to be vulnerable to additional input. Minor to isolated
moderate river flooding is forecast across portions of the Puget Sound in
Washington. Additionally, urban flooding of typically flood prone areas is
also a concern if the heavier daily rainfall totals were to materialize.
While this selection is in the extended range of the forecast, confidence
has continued to increase in Limited flooding impacts, however, the exact
magnitude and location is still continuing to be refined. This area will
need to be closely monitored as we approach the heavier amounts of this
event for any further adjustments.

//JAC

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

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