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AGUS74 KWCO 181242
HMDNWC

National Hydrologic Discussion - EXPERIMENTAL
NWS National Water Center - Tuscaloosa AL
700 AM CST TUE NOV 18 2025

UPDATE

The limited flood impacts selection across American Samoa has been removed
from the latest issuance of the Flood Hazard Outlook since the threat of
flash flooding has ended. A limited flood impacts area was introduced
across portions of southeastern CA, far-southern NV, and
northwestern/central AZ given issuance of flood watches across this region,
as well as an increase in rainfall amounts along the Mogollon Rim and
northern AZ through Wednesday. The current limited flood impacts area
across the Southern Plains and Ozarks was extended further southwest into
the TX Hill Country given an increase in rainfall totals (areas of 3+").

//JDP

Previous Discussion as follows

...Flash and urban flooding possible for California through this evening...
...Flood threat developing over the Southern Plains into the Ozarks late
week...

.California...
Isolated heavy rainfall will be possible through this evening, which will
bring a chance of isolated flooding to the region. The greatest threat of
impacts will be in and around recently burned areas, where flash flooding
and debris flow may occur if heavy rainfall moves over. Rainfall should
start to move east of the region tonight, bringing drier conditions to the
area.

.Southern Plains into the Ozarks...
Moderate to heavy rainfall late this week will bring the potential for
flash and urban flooding to the region. Generally, this region is dry,
which will mitigate much in the way of impacts late this week going into
the weekend. A second round of rainfall is expected over the Red River
Valley into central Texas by early next week, which may bring a greater
potential for rises on small streams within the region. The main threat
remains flash and urban flooding for both the initial and second event,
with no changes to the FHO with this issuance.

.American Samoa...
Heavy rainfall will bring the potential for flash flooding to the island
today.

//GKendrick

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




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