Tuesday, September 27, 2011

[californiadisasters] SKYWARN WX Condition Reporting Guidelines

What to Report?

Remember to please keep calls short with the information given below, as well as specific times and locations of reports, and a reference to the nearest city/town (if possible). There are many spotters who call at the same time. This helps all calls get through in a timely manner.

Flooding/Debris Flows:
- Rainfall Intensity: How much is falling over a specific period?
- Flooding or Debris Flows that are threatening life/property, or are disrupting traffic.
- Describe the flooding:
- water depth
- time it began and ended

Winter Weather:
- Amount, rate and time of new snow accumulations.
- Elevation of snow level
- Icing of roads or road closures
- Very low temperatures:
- Coast: 35 degrees or lower
- Valleys: 30 degrees or lower
- Deserts: 20 degrees or lower
- Significant wind chill

- Report visibilities less than or equal to 1/4 mile

- Report winds of 30 mph or more
- Speed of winds (sustained or gusts)

Extreme Heat:
- Report for these temperature thresholds:
- Coast: 95 degrees or higher
- Valleys: 105 degrees or higher
- Deserts: 115 degrees or higher

- Estimated location, duration, speed and direction of movement
- Any hail (size, accumulation, etc)
- 1/4" = pea size
- 1/2" = marble size
- 3/4" = penny size
- 1" = quarter size
- 1 3/4" = golf ball size
- Wind speeds and gusts
- Rainfall rate and amount
- If lightning strikes any object

- Report when surf is 6 feet or greater
- Any flooding or damage caused by high tides and/or high surf

- Funnel clouds, waterspouts or any rotating clouds
- Estimated location, duration, speed and direction or movement Damage or Injuries:
- Please report any confirmed weather-related damage, injuries, or deaths.

Source: http://www.wrh.noaa.gov/lox/scripts/headline_download.php?get=20110927_1346.pdf

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