Weather Alert in Alaska

Recent Locations: Cooper Landing, AK   Proctor, VT   Mapleton, OR  

Hydrologic Outlook issued August 26 at 1:47PM AKDT by NWS Anchorage AK

AREAS AFFECTED: Anchorage; Anchorage Hillside / Eagle River; East Turnagain Arm; Portage; Lower Matanuska Valley; Hatcher Pass; Sutton / Upper Matanuska Valley; Eureka / Tahneta Pass; Southern Kachemak Bay; SW Kenai Peninsula; NW Kenai Peninsula; Skilak Lake; Southern Kenai Mtns; Interior Kenai Peninsula; Turnagain Pass; West Prince William Sound & Whittier; Tyonek; Valdez; Thompson Pass; Cordova; Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley; Northern Susitna Valley

DESCRIPTION: ESFAFC Rainfall: * Eastern Kenai Peninsula and Prince William Sound: 2 to 4 inches with locally higher amounts in higher terrain. * Mat-Su Valley: 1 to 3 inches with locally higher amounts. The highest rainfall totals are likely to be across the northern Susitna Valley. * Western Kenai Peninsula and Anchorage: 1 to 2 inches of rainfall with the heaviest rainfall occuring adjacent to Cook Inlet. Downsloping at times may result in localized lower amounts immediately west of the mountains. Hydrologic Concerns * Expect sharp rises on many small streams and rivers. Many smaller streams will crest Thursday night into Friday while larger rivers or downstream points may crest Friday and Saturday. Higher than normal water levels may continue through Labor Day Weekend into next week. * Many lower locations along rivers such as gravel bars and other spots popular for camping and recreating are likely to become inundated with water. * Heavy rain may result in localized ponding in low-lying areas and locations with poor drainage. Confidence and Next Steps * Confidence is high that a multi-day heavy rainfall event will occur across Southcentral Alaska, with the northern Susitna Valley and Prince William Sound receiving the heaviest rainfall. Confidence is medium regarding rainfall totals and placement of heaviest rainfall. If forecast rainfall totals hold or increase, flood watches may be needed for portions of the Kenai Peninsula, Mat-Su Valley, or elsewhere. * Residents along area streams as well as river users and recreationists should anticipate higher than normal water levels and are advised to monitor weather and river forecasts. * Reports on river conditions may be sent to the river forecast center by calling 1-800-847-1739.

INSTRUCTION: N/A

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Weather Topic: What is Fog?

Home - Education - Cloud Types - Fog

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.

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Weather Topic: What is Freezing Rain?

Home - Education - Precipitation - Freezing Rain

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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