Weather Alert in Montana
Hydrologic Outlook issued July 31 at 7:25PM MDT by NWS Glasgow MT
AREAS AFFECTED: Daniels, MT; Dawson, MT; Garfield, MT; McCone, MT; Petroleum, MT; Phillips, MT; Prairie, MT; Richland, MT; Roosevelt, MT; Sheridan, MT; Valley, MT; Wibaux, MT
DESCRIPTION: ESFGGW There will be chances for showers and thunderstorms each day from tonight through Sunday. Any storms that occur will be slow moving and capable of producing very heavy rain. There will be potential for flash flooding in any areas that receive heavy rain. Small streams and creeks have the potential for quick water rises in any areas where heavy rain occurs. Stay tuned to the forecast for any watches, warnings or advisories. Please report any flooding that occurs to local law enforcement and have them relay the report to the National Weather Service.
INSTRUCTION: N/A
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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