Weather Alert in Texas
Flood Advisory issued September 5 at 10:24PM CDT until September 6 at 1:00AM CDT by NWS Fort Worth TX
AREAS AFFECTED: Collin, TX; Denton, TX; Grayson, TX
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of north central Texas, including the following counties, Collin, Denton and Grayson. * WHEN...Until 100 AM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - Doppler radar indicated heavy rain due to thunderstorms moving over the same areas as earlier this evening. Radar estimates between 1 and 3 inches of rain have fallen so far this evening. Additional rainfall amounts of 1 to 2 inches are forecast. Some roads and low lying or poor drainage areas will experience minor flooding in the advisory area. - Some locations that will experience flooding include... McKinney, Frisco, Denton, Sherman, Corinth, Sanger, Little Elm, Denison, Prosper, Anna, Celina, Melissa, Krum, Pilot Point, Van Alstyne, Shady Shores, Howe, Aubrey, Krugerville and Whitewright.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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