Snow in the Intermountain West; Critical Fire Weather Conditions in the Central U.S.

A Pacific Storm will bring colder temperatures and widespread mountain snow to much of the Intermountain West through the end of the week. Elevated to critical fire weather conditions will persist over parts of the northern and central Plains, the Great Basin, and the northern Gulf Coast Thursday where widespread Red Flag Warnings have been issued. Read More >

Flash Flood

Flooding that begins within 6 hours, and often within 3 hours, of the heavy rainfall (or other possible cause)

Flash floods are the most dangerous kind of floods, because they combine the destructive power of a flood with incredible speed. Flash floods occur when heavy rainfall exceeds the ability of the ground to absorb it, or when enough water accumulates for streams to overtop their banks, causing rapid rises of water in a short amount of time. They can happen within minutes of the causative rainfall, limiting the time available to warn and protect the public.

Flash Flood Terminology

Flash Flood Watch	Flash flooding is possible within the designated watch area -- Be alert !
Flash Flood Warning	Flash flooding has been reported or is imminent -- Take necessary precautions at once!
Small Stream Advisory	Flooding of small streams, roads and low-lying areas is occurring.
Flash Flood Statement	Follow-up information regarding flash flood event.