Weather Alert in California

Recent Locations: Lake Hughes, CA  

Flood Advisory issued July 26 at 4:34PM PDT until July 26 at 6:30PM PDT by NWS Reno NV

AREAS AFFECTED: Lassen, CA; Plumas, CA

DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northeast California, including the following counties, Lassen and Plumas. * WHEN...Until 630 PM PDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 434 PM PDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen. - Some locations that will experience flooding include... Chilcoot-Vinton. - http://www.weather.gov/safety/flood

INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Recent burn areas are more prone to flooding, debris flows, and rock falls. Plugged culverts, rocks and debris on roads, and water and mud over roads are common during moderate to heavy rains. Increased sediment and debris can lead to impacts in areas typically not prone to flooding. Use extra caution when traveling in or below recent burn areas. Impactful flooding and debris flows may be generated by 15 minutes or less of heavy rainfall.

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Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

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