Weather Alerts for Oregon

Recent Locations: Bellville, TX Clarks, NE Independence, OR

1. Winter Storm Warning for: Central Douglas County

2. Winter Storm Warning for: Eastern Curry County and Josephine County

3. Winter Storm Warning for: Jackson County

4. Winter Storm Warning for: Northern Blue Mountains of Oregon; Northwest Blue Mountains

5. Winter Weather Advisory for: Central Douglas County

6. Winter Weather Advisory for: East Slopes of the Oregon Cascades

7. Winter Weather Advisory for: Eastern Curry County and Josephine County

8. Winter Weather Advisory for: Eastern Douglas County Foothills; South Central Oregon Cascades; Siskiyou Mountains and Southern Oregon Cascades

9. Winter Weather Advisory for: Grande Ronde Valley; Wallowa County; Southern Blue Mountains of Oregon

10. Winter Weather Advisory for: Jackson County

11. Winter Weather Advisory for: North Oregon Cascades; Cascades of Marion and Linn Counties; Cascades of Lane County; South Washington Cascades

12. Winter Weather Advisory for: North Oregon Coast Range Lowlands; North Oregon Coast Range; Central Oregon Coast Range; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; Willapa Hills; South Washington Cascade Foothills

13. Winter Weather Advisory for: Ochoco-John Day Highlands

14. Winter Weather Advisory for: West Hills and Chehalem Mountains

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow