Weather Alert in Alaska
Flood Advisory issued August 27 at 2:48PM AKDT until August 29 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...Koyukuk River at Allakaket. * WHEN...Until noon AKDT Friday. * IMPACTS...Minor flooding in low-lying and poorly drained areas. Water over roadways may cut off access to the downtown area and possibly to the runway. * ADDITIONAL DETAILS... - As of Wednesday morning,the public has reported minor flooding in Allakaket with river levels expected to continue to rise through Thursday morning. Between 3 and 5 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible through Friday. The Koyukuk River at Allakaket is expected to crest late Wednesday or early Thursday. The timing of the crest of the Alatna River at the confluence with the Koyukuk River is uncertain due to the lack of streamgage data, but could occur coincidentally with the Koyukuk crest. - http://www.weather.gov/aprfc
INSTRUCTION: Continue to monitor river levels and take appropriate actions to protect lives and property.
Want more detail? Get the Complete 7 Day and Night Detailed Forecast!
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 Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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
Current conditions powered by WeatherAPI.com
