Warnings (Severe Thunderstorm, Flash Flood, Dust Storm, or in rare cases, Tornado) mean that life-threatening weather is about to occur, or has been reported. Take action immediately.
Flood Advisories mean heavy rains will cause minor flooding of washes, streams, and typical flood-prone areas. Flooding in this situation is usually not serious. If the flooding does become life threatening, then the flood advisory is upgraded to a Flash Flood Warning.
Warnings are not issued for lightning, mainly because most thunderstorms, no matter how weak, produce deadly cloud-to-ground lightning.
Dust storms usually last a few minutes, and up to an hour at most. Stay where you are until the dust storm passes.
Avoid driving into or through a dust storm. If you encounter a dust storm
Immediately check traffic around your vehicle (front, back and to the side) and begin slowing down.
Do not wait until poor visibility makes it difficult to safely pull off the roadway -- do it as soon as possible. Completely exit the highway if you can.
Do not stop in a travel lane or in the emergency lane. Look for a safe place to pull completely off the paved portion of the roadway.
Created with images by osgoodcs0 - "lightening storm night" • WikimediaImages - "lightning thunder lightning storm" • Anders Jildén - "untitled image" • John Fowler - "untitled image"Photo credits - James BO Insogna