Weather Alerts for New York
1. Air Quality Alert for: Rockland; Northern Westchester; Southern Westchester; New York (Manhattan); Bronx; Richmond (Staten Is.); Kings (Brooklyn); Northwest Suffolk; Northeast Suffolk; Southwest Suffolk; Southeast Suffolk; Northern Queens; Northern Nassau; Southern Queens; Southern Nassau
2. Coastal Flood Statement for: Southern Queens; Southern Nassau
3. Heat Advisory for: Jefferson; Lewis; Northern Erie; Genesee; Wyoming; Chautauqua; Cattaraugus; Allegany; Southern Erie
4. Heat Advisory for: New York (Manhattan); Bronx; Richmond (Staten Is.); Kings (Brooklyn); Northern Queens; Southern Queens
5. Heat Advisory for: Niagara; Orleans; Monroe; Wayne; Northern Cayuga; Oswego; Livingston; Ontario
6. Heat Advisory for: Northern Oneida; Cortland; Chenango; Otsego; Delaware; Sullivan
7. Heat Advisory for: Northern St. Lawrence; Northern Franklin; Eastern Clinton; Southeastern St. Lawrence; Western Clinton; Eastern Essex; Southwestern St. Lawrence; Grand Isle; Western Franklin; Orleans; Essex; Western Chittenden; Lamoille; Caledonia; Washington; Western Addison; Orange; Western Rutland; Eastern Franklin; Eastern Chittenden; Eastern Addison; Western Windsor; Eastern Windsor
8. Heat Advisory for: Northwest Suffolk
9. Heat Advisory for: Schoharie; Western Albany; Eastern Rensselaer; Western Greene; Western Ulster; Western Windham
10. Heat Advisory for: Southern Herkimer; Southern Fulton; Montgomery; Northern Saratoga; Northern Warren; Northern Washington; Western Schenectady; Eastern Schenectady; Southern Saratoga; Eastern Albany; Western Rensselaer; Eastern Greene; Western Columbia; Eastern Columbia; Southeast Warren; Southern Washington; Eastern Windham
11. Heat Advisory for: Southwest Suffolk
12. Heat Advisory for: Yates; Seneca; Southern Cayuga; Onondaga; Steuben; Schuyler; Chemung; Tompkins; Madison; Southern Oneida; Tioga; Broome
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North America Water Vapor (Moisture)
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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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