Batten down the hatches Portland. Wednesday’s weather will be wet and windy in the valleys and dump snow across the Cascades. The National Weather Service says the incoming cold-frontal boundary, and ...

Understanding the Context

Dry and mild today. A cold front will then bring rain and snow along with cooler temperatures Wednesday and Thursday. Warmer air then quickly returns for the weekend. OregonLive.com on MSN: Wild weather Wednesday offers Portland rain, thunderstorms, heavy Cascade snow A cold front bring widespread valley rain along with mountain snow Wednesday through Friday.

Key Insights

High pressure builds with sunshine and warm weather for the weekend. NOAA National Weather Service National Weather Service Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in ... How Much Will it Snow?

Final Thoughts

| Snowfall forecasts for all US cities Warm, humid air builds into midweek with storm chances Tuesday, but Wednesday has the stronger signal for a few severe storms. Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater. Major snow-prone areas include the polar regions, the northernmost half of the Northern Hemisphere, and mountainous regions worldwide with sufficient moisture and cold temperatures.