Weather Alerts for Hawaii
1. Flood Advisory for: Hawaii in Hawaii, HI
2. Flood Advisory for: Maui, HI
3. Flood Advisory for: Maui, HI
4. Flood Watch for: Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Big Island East; Big Island North
5. High Surf Warning for: Olomana; Kahoolawe; Maui Windward West; Kauai East; East Honolulu; Koolau Windward; Molokai Windward; Molokai Southeast; Windward Haleakala; Kipahulu; South Haleakala; Big Island Southeast; Big Island East; Big Island North
6. High Wind Warning for: Kauai Southwest; Kauai Mountains; Waianae Coast; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Leeward West; Kohala; Big Island Interior; Kauai South; Honolulu Metro; Ewa Plain; Koolau Leeward; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South
7. High Wind Warning for: Niihau; Oahu North Shore; Olomana; Maui Windward West; Kauai North; Kauai East; East Honolulu; Koolau Windward; Molokai Windward; Molokai Southeast; Molokai North; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Big Island North
8. Winter Storm Warning for: Big Island Summit
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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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