Weather Alert in Arizona

Recent Locations: Samoa, CA   San Simon, AZ   Dallas, WV  

Flash Flood Warning issued September 4 at 1:24PM MST until September 4 at 4:30PM MST by NWS Flagstaff AZ

AREAS AFFECTED: Coconino, AZ

DESCRIPTION: FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for...Nankoweap Creek...in Coconino County in north central Arizona...this includes the Colorado River between river miles 49 and 53. * Until 430 PM MST /530 PM MDT/. * At 124 PM MST /224 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain over Nankoweap Creek. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding in and around Nankoweap Creek. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around Nankoweap Creek. * Some locations that will experience flash flooding include... Grand Canyon National Park and Saddle Mountain Wilderness. This includes the Colorado River between river miles 49 and 53. This includes the following recreation areas and campgrounds... Dinosaur Camp Site, Little Nankoweap Camp Site and Upper Nankoweap Camp Site. This includes the following creeks, washes and rivers... Nankoweap Creek, Saddle Canyon, Colorado River, Nankoweap Canyon and Little Nankoweap Creek.

INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in Nankoweap Creek. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.

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Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds

Weather Topic: What is Drizzle?

Home - Education - Precipitation - Drizzle

Drizzle Next Topic: Evaporation

Drizzle is precipitation in the form of water droplets which are smaller than raindrops.

Drizzle is characterized by fine, gently falling droplets and typically does not impact human habitation in a negative way. The exception to this is freezing drizzle, a condition where drizzle freezes immediately upon reaching earth's surface. Freezing drizzle is still less dangerous than freezing rain, but can potentially result in hazardous road conditions.

Next Topic: Evaporation

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