Weather Alert in Alaska
Hydrologic Outlook issued August 29 at 12:50PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Northern Bristol Bay Coast
DESCRIPTION: ESFAFC Prolonged moderate to heavy rain from Togiak to Dillingham is expected Saturday afternoon through Monday morning. Lighter rain showers will begin as early as Saturday morning and will continue into Monday evening. Expect water levels along small streams and rivers to rise, especially in steeper terrain. Expected Rainfall: Saturday Morning through Monday afternoon * Togiak/Twin Hills: 3.5 inches. * Dillingham: 2.2 inches. * Manokotak: 2.7 inches. * Clarks Point: 2.1 inches. Hydrologic Concerns: * Higher than normal river and stream levels have already been noted. Higher than normal water levels may continue into Tuesday. * Many lower locations along rivers such as gravel bars are likely to become inundated with water. * Heavy rain may result in localized ponding in low-lying areas and locations with poor drainage. Next Steps: * Residents along area streams as well as river users 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 Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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