Weather Alert in Montana
Hydrologic Outlook issued August 25 at 4:54PM MDT by NWS Great Falls MT
AREAS AFFECTED: Beaverhead, MT; Broadwater, MT; Cascade, MT; Gallatin, MT; Jefferson, MT; Lewis and Clark, MT; Madison, MT; Meagher, MT
DESCRIPTION: ESFTFX Monsoon moisture will slowly move northward and bring periods of widespread rain and embedded thunderstorms to Southwest and portions of Central Montana Tuesday night through Friday. Localized heavier downpours in excess of a half inch per hour can be expected with the heavier cells in addition to the general four day storm totals between a quarter to an inch and a half. The most persistent and heaviest rainfall is expected along and south of I90 on Wednesday and Thursday. Impacts will mostly be limited to sensitive burn scars or other normally flood prone locations or areas of steep terrain and may include instances of localized flooding, debris flows, and rock slides. Those considering any backcountry travel for Wednesday and Thursday of this week should be prepared for periods of excessive rainfall, muddy roads, and potential localized flooding.
INSTRUCTION: N/A
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Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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
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