Weather Alert in Minnesota

Recent Locations: Newark, NJ Alpine, AR Minnetonka, MN

Current Alerts for Minnetonka, MN: Flood Warning Heat Advisory

Flood Watch issued July 4 at 2:58AM CDT until July 5 at 1:00PM CDT by NWS Duluth MN

AREAS AFFECTED: Northern Cook/Northern Lake; Central St. Louis; North Cass; South Itasca; South Cass; Crow Wing; Northern Aitkin; South Aitkin

DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...In Minnesota, in east central Minnesota, Crow Wing and Aitkin Counties. In north central Minnesota, South Itasca and Cass Counties. In northeast Minnesota, Central St. Louis and Northern Cook and Lake Counties. This includes the Tribal Lands of the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Big Sandy Lake and, East Lake areas.This also includes the Boundary Waters eastern and central area. * WHEN...From this evening through Saturday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - A slow moving cold front will bring heavy rainfall which may lead to rapid runoff and flash flooding late this afternoon into Saturday. Heavy rainfall amounts of 1 to 3 inches are expected, with localized amounts in excess of 3 inches possible. - Flood safety information can be found at www.weather.gov/safety/flood.

INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds