Weather Alert in Oregon
Flood Warning issued March 13 at 11:20PM PDT until March 14 at 11:14AM PDT by NWS Portland OR
AREAS AFFECTED: Clackamas, OR; Multnomah, OR
DESCRIPTION: ...Observed flooding changed to Minor severity and increased in duration for the following rivers in Oregon... Wilson River near Tillamook affecting Tillamook County. ...The Flood Warning continues for the following rivers in Washington...Oregon... Cowlitz River at Kelso affecting Cowlitz County. Grays River at Covered Bridge near Rosburg affecting Wahkiakum County. Johnson Creek at Sycamore affecting Clackamas and Multnomah Counties. Nehalem River near Foss affecting Clatsop and Tillamook Counties. * WHAT...Minor flooding is forecast. * WHERE...Johnson Creek at Sycamore. * WHEN...Until late tomorrow morning. * IMPACTS...Above 11.0 feet, minor flooding begins along Johnson Creek between SE 92nd Street to SE 122nd Street and between Johnson Creek and SE Harold Street. * ADDITIONAL DETAILS... - At 10:30 PM PDT Friday the stage was 5.3 feet. - Bankfull stage is 10.0 feet. - Forecast...The river will rise above flood stage to 11.1 feet early Saturday morning. It will then fall below flood stage Saturday afternoon. - Flood stage is 11.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Motorists should not attempt to drive around barricades or drive through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov. The next statement will be issued early Saturday morning at 515 AM PDT.late tonight at 500 AM PDT.
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Weather Topic: What is Fog?
Home - Education - Cloud Types - Fog
Next Topic: Fractus Clouds
Fog is technically a type of stratus cloud, which lies along the
ground and obscures visibility.
It is usually created when humidity in the air condenses into tiny water droplets.
Because of this, some places are more prone to foggy weather, such as regions
close to a body of water.
Fog is similar to mist; both are the appearance of water droplets suspended in
the air, but fog is the term applied to the condition when visibility is less than 1 km.
Next Topic: Fractus Clouds
Weather Topic: What is Freezing Rain?
Home - Education - Precipitation - Freezing Rain
Next Topic: Graupel
Freezing rain is a condition where precipitation which has fallen in the form of
water droplets reaches temperatures which are below freezing and freezes upon
coming into contact
with surface objects. The result of this precipitation is a glaze of ice which
can be damaging to plants and man-made structures. A severe onset of freezing
rain which results in a very thick glaze of ice is known as an ice storm.
Next Topic: Graupel
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