Weather Alert in Minnesota
Fire Weather Watch issued May 19 at 8:13PM CDT until May 20 at 9:00PM CDT by NWS Duluth MN
AREAS AFFECTED: Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; South Itasca
DESCRIPTION: ...FIRE WEATHER WATCH IN EFFECT TUESDAY MAY 20 FOR CRITICAL FIRE WEATHER... A strong high pressure system over Ontario is expected to bring an area of very dry air to northern Minnesota, along with a tight pressure gradient that will make for strong east winds. Relative humidity may drop as low as 15 to 20%, with east winds of 15 to 25 mph, with gusts as high as 40 mph. Across eastern portions of the Fire Weather Watch, a Wind Advisory is also in effect. * AFFECTED AREA...In Minnesota, Koochiching, North St. Louis, Northern Cook and Lake, North Itasca, Central St. Louis and South Itasca. * WINDS...East 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that ignite could spread rapidly and become difficult to control. Outdoor burning is not recommended.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - 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
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