Hydrometeorological Discussion
Issued by NWS Tuscaloosa, AL
Issued by NWS Tuscaloosa, AL
280 AGUS74 KWCO 072002 HMDNWC National Hydrologic Discussion - EXPERIMENTAL NWS National Water Center - Tuscaloosa AL 200 PM CST SUN DEC 7 2025 Considerable flooding expected, with landslides possible across portions of the Pacific Northwest beginning late Monday and will continue through the week...Rain and snowmelt may generate urban and small stream flooding across portions of the Northern Rockies this week... .Pacific Northwest... A series of frontal systems will bring periods of heavy rainfall through at least mid-week across western WA and OR with considerable river flooding and widespread urban and small stream flooding expected. The flooding impacts will be greatest on Monday night through Wednesday of next week when the heaviest rainfall (daily totals of 2 - 5", locally up to 7") are expected. Soils are saturated and daily rainfall through the week will sufficiently prime the hydrologic environment. Due to the saturated soils, landslides in the steep or mountainous terrain are possible mid-week as heavy rainfall lingers across the region. Widespread minor to scattered major river flooding is forecast with rapid rises beginning to occur late Monday evening, particularly in the foothills of the Cascades and will continue through the end of the week. Many of the rivers and streams are forecast to experience multiple peaks throughout the week as multiple rounds of rainfall move across the basins. While the magnitude and extent of responses continues to fluctuate somewhat due to the timing of the event, confidence in Considerable flooding impacts remains high. .Northern Rockies... Multiple rounds of rainfall and snowmelt may generate urban and small stream flooding across portions of northern ID and southwestern MT Monday night through Thursday. A Limited impacts area was added across this region given an issuance of a flood watch and potentially significant amounts of SWE loss (up to 2") over the next several days. //JDP Additional National Water Center products are available at www.weather.gov/owp/operations $$