Weather Alert in New York

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Severe Thunderstorm Warning issued April 29 at 5:42PM EDT until April 29 at 6:45PM EDT by NWS Buffalo NY

AREAS AFFECTED: Allegany, NY; Cattaraugus, NY; Erie, NY; Livingston, NY; Monroe, NY; Ontario, NY; Wayne, NY; Wyoming, NY

DESCRIPTION: SVRBUF The National Weather Service in Buffalo has issued a * Severe Thunderstorm Warning for... South central Wayne County in western New York... Wyoming County in western New York... Northeastern Cattaraugus County in western New York... Southeastern Erie County in western New York... Livingston County in western New York... Northern Allegany County in western New York... Southeastern Monroe County in western New York... Ontario County in western New York... * Until 645 PM EDT. * At 541 PM EDT, severe thunderstorms were located along a line extending from near Ashford Hollow to Bloomfield, moving east at 65 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Honeoye Falls, Ossian Center, Fillmore, Livonia, Swain, Bliss, Springwater, Hunt, Perry, and South Lima. This includes the following highways... Interstate 390 between exits 4 and 10. Interstate 90 between exits 42 and 45.

INSTRUCTION: For your protection move to an interior room on the lowest floor of a building.

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - 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

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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