Weather Alert in Texas
Red Flag Warning issued February 19 at 12:09AM CST until February 19 at 7:00PM CST by NWS Fort Worth TX
AREAS AFFECTED: Cooke
DESCRIPTION: ...CRITICAL FIRE DANGER IS POSSIBLE ACROSS PORTIONS OF WESTERN NORTH TEXAS LATE THURSDAY MORNING THROUGH THURSDAY EVENING... The National Weather Service in Fort Worth has issued a Red Flag Warning for near-critical to critical fire weather conditions, which is in effect from 10 AM this morning to 7 PM CST this evening. * WINDS...West 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Up to 75. * IMPACTS...The combination of gusty winds and very low relative humidity values will favor the rapid spread of wildfires should one start. Any outdoor burning is not advised. * SEVERITY... FUELS (ERC)...70th-89th percentile...4 (out of 5). WEATHER...Near-Critical...2 (out of 5). FIRE ENVIRONMENT...5 (out of 10).
INSTRUCTION: A Red Flag Warning means that extreme fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and dry vegetation can contribute to extreme fire behavior. Avoid all outside burning and welding today. Do not toss lit cigarette butts outside. Report wildfires to the nearest fire department or law enforcement office.
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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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