Weather Alert in Wisconsin

Recent Locations: Genoa, WI

Winter Weather Advisory issued March 13 at 2:04PM CDT until March 15 at 10:00AM CDT by NWS Milwaukee/Sullivan WI

AREAS AFFECTED: Marquette; Green Lake; Fond Du Lac; Sheboygan; Sauk; Columbia; Dodge; Washington; Ozaukee

DESCRIPTION: ...A PROLONGED WINTER WEATHER EVENT IS EXPECTED THROUGH THE LAST HALF OF THE WEEKEND AND THROUGH MONDAY... .A strong late winter storm system is expected to impact southern Wisconsin during the last half of the weekend in 3 phases: The first phase will run from Saturday night into Sunday morning and will feature a Winter Weather Advisory. During this time, snow accumulations of 1 to 3 inches are expected in the advisory area along with the potential for a up to a tenth of an inch of ice accumulation. The second phase is then expected from Sunday late morning into Sunday afternoon as warm air causes a transition to rain over a majority of southern Wisconsin. Thunderstorms may occur during this time. The last phase will then run from late Sunday afternoon through Monday as cold air then wraps back into the area and heavy banded snow moves in. Snowfall totals from 5 to 9 inches will result. A light glaze of ice may also occur, especially over central and east central Wisconsin. Wind gusts up to 45 mph will cause blowing snow and visibility restrictions. Hazardous travel is expected during both headline time frames. * WHAT...For the Winter Weather Advisory, mixed precipitation expected. Total snow and sleet accumulations between 1 and 3 inches. Ice accumulations up to one tenth of an inch. Highest amounts for both snow and ice will occur toward central Wisconsin. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow is possible. Total snow accumulations between 5 and 9 inches. A light glaze of ice may occur. Winds could gust as high as 45 mph causing blowing snow and visibility restrictions. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...For the Winter Weather Advisory, from 7 PM Saturday to 10 AM CDT Sunday. For the Winter Storm Watch, from Sunday afternoon through Monday evening. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. Gusty winds could bring down tree branches. Visibilities may drop below 1/4 mile due to falling and blowing snow. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages.

INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Monitor the latest forecasts for updates on this situation.

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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