Weather Alert in Washington
Flood Warning issued March 20 at 4:15PM PDT until March 22 at 12:07AM PDT by NWS Pendleton OR
AREAS AFFECTED: Kittitas, WA
DESCRIPTION: ...The National Weather Service in Pendleton OR has issued a Flood Warning for the following rivers in Washington... Yakima River at Umtanum affecting Kittitas County. Yakima River near Parker affecting Yakima County. Yakima River at Kiona affecting Benton County. For the Yakima River...including Horlick, Umtanum, Parker, Kiona... Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Yakima River at Umtanum. * WHEN...From late tonight to early Sunday morning. * IMPACTS...At 35.5 feet, At this level, there will be minor flooding in areas along the river from Teanaway to Ellensburg including Irene Rienhart Park in Ellensburg. * ADDITIONAL DETAILS... - At 3:15 PM PDT Friday the stage was 34.8 feet. - Bankfull stage is 33.5 feet. - Forecast...The river will rise above flood stage just after midnight tonight to 35.7 feet late tomorrow morning. It will then fall below flood stage tomorrow evening to 33.3 feet late Tuesday evening. It will rise to 33.8 feet late Thursday morning. It will then fall again and remain below flood stage. - Flood stage is 35.5 feet. - Flood History...This crest compares to a previous crest of 35.2 feet on 01/31/1965. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/pdt.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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