Weather Alert in Texas
Flood Watch issued June 11 at 9:53PM CDT until June 12 at 7:00PM CDT by NWS Houston/Galveston TX
AREAS AFFECTED: Houston; Trinity; Madison; Walker; Burleson; Brazos; Washington; Grimes; Montgomery; Colorado; Austin; Waller
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southeast Texas, including the following counties, Austin, Brazos, Burleson, Colorado, Grimes, Houston, Madison, Montgomery, Trinity, Walker, Waller and Washington. * WHEN...Through Thursday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - The next round of showers and thunderstorms is expected to pass through the region late tonight and Thursday morning. Though the band of storms should be moving at an average rate, upper level conditions are favorable for some training and regenerating storms. Several inches of rain in a short time period appear to be possible where this occurs. Model trends have shown the axis of heavier rainfall shifting south with each subsequent run with the latest suite showing deeper moisture advection and low level convergence setting up near the houston metro and southwestern counties. Watch area has been expanded by a generous amount to cover the evolving flood threat and uncertainty still present in short range forecast models. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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