Weather Alert in Pennsylvania

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Flash Flood Warning issued August 13 at 2:35PM EDT until August 13 at 5:15PM EDT by NWS Binghamton NY

AREAS AFFECTED: Lackawanna, PA; Luzerne, PA

DESCRIPTION: At 235 PM EDT, Local law enforcement reported flash flooding in several locations from thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. Additional rainfall of an inch or two is possible in spots. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Law enforcement reported. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Scranton, Pittston, Dunmore, Old Forge, Archbald, Dickson City, Moosic, Olyphant, Clarks Summit, West Wyoming, Moscow, Mayfield, Elmhurst, Glendale, Mount Cobb, Blakely, Taylor, Exeter, Swoyersville and Duryea.

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

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

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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