Weather Alert in Hawaii

Recent Locations: Saginaw, MI Ponsford, MN Waialua, HI

Current Alerts for Waialua, HI: Red Flag Warning

Red Flag Warning issued August 2 at 3:08AM HST until August 2 at 6:00PM HST by NWS Honolulu HI

AREAS AFFECTED: Niihau; Kauai South; Kauai Southwest; East Honolulu; Honolulu Metro; Ewa Plain; Waianae Coast; Oahu North Shore; Central Oahu; Waianae Mountains; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Lanai Mauka; Kahoolawe; Maui Leeward West; Maui Central Valley North; Maui Central Valley South; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Kohala; Big Island Interior

DESCRIPTION: ...RED FLAG WARNING IN EFFECT THROUGH THIS AFTERNOON FOR GUSTY WINDS AND LOW HUMIDITY... .A dry and locally windy trade wind flow will produce critical fire weather conditions through this afternoon. Winds will be strongest over and downwind of terrain. Winds will begin a slow decline on Sunday, though near critical fire weather conditions are expected as dry weather persists over leeward areas. * AFFECTED AREA...Leeward portions of all Hawaiian Islands and interior sections of the Big Island. * TIMING...Until 6 PM HST this evening. * WINDS...East 15 to 30 mph with gusts up to 35 mph on Oahu and Kauai, and gusts up to 50 mph in Maui County and on the Big Island. * RELATIVE HUMIDITY...Lowering to 35 to 45 percent in the afternoon hours. * IMPACTS...A combination of strong winds, low relative humidity, and dry fuels can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. A Red Flag Warning does not predict new fire starts.

INSTRUCTION: Outdoor burning is not recommended. Heat from vehicle exhaust systems can ignite dry grass. Park cars on areas that are paved or where vegetation is trimmed and cleared. High winds contribute to wildfire hazard. Delay activities that could throw off sparks until the wind dies down. A Red Flag Warning means that critical fire weather conditions are either occurring now or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Red Flag Warning does not predict new fire starts.

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Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail