Weather Alert in Alaska
Flood Watch issued August 27 at 2:07PM AKDT until August 29 at 10:00AM AKDT by NWS Anchorage AK
AREAS AFFECTED: Southern Kenai Mtns
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is possible. 3 to 5 inches of rainfall. * WHERE...The following area, Southern Kenai Mtns. This includes the city of Seward. * WHEN...From 10 PM AKDT this evening through Friday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Landslides may possible in areas of steep terrain. Ponding on roadways may result in hydroplaning. * ADDITIONAL DETAILS... - A multi-day rainfall event is underway across Southcentral Alaska. Rainfall totals are generally expected to range between 3 and 5 inches for Seward, Bear Creek, and nearby areas. Locally higher amounts possible in higher terrain. Rain is expected to taper off during the day on Friday, though high water is likely to persist into the weekend. - Http://www.weather.gov/safety/flood
INSTRUCTION: Persons living along streams should stay alert and be prepared to take action if a warning or advisory is issued, or flooding is observed. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information.
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Weather Topic: What is Rain?
Home - Education - Precipitation - 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
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
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