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Local and California Severe Weather Products

National Severe Weather Products


Click for a larger image. (Courtesy of National Oceanic and Atmospheric Administration/Department of Commerce)
Watches, Warnings, and Advisories

The National Weather Service has created an Interactive Weather Information Network (IWIN) home page to provide you with the latest watch, warning or advisory. However, remember that the following is for informational purposes only, NOT as the primary source for ANY watch, warning, or advisory. Also, be sure to check the date and time of the following. Check IWIN's readme to make sure you are getting the latest information. Get the latest watches, warnings or advisories for....

Watches, warnings and advisories are non-routine products issued by the National Weather Service. They are issued to alert you of meteorological events that could pose a threat to life and property. They are divided into three main categories...severe weather, winter weather and non-precipitation weather (fog, dusts storms, etc).

A watch is issued when the risk of hazardous weather or hydrological event has increased significantly, but its occurrence, location and/or timing is still uncertain. It is intended to provide enough lead time so those who need to set their plans in motion can do so. Watches evolve into warnings, advisories or they are canceled.

Warnings are issued when a hazardous weather or hydrologic event is occurring, is imminent or has a very high probability of occurrence. It is used for conditions posing a threat for life or property. The National Weather Service is the single "official" voice when issuing warnings for life-threatening situations.

An advisory is for less serious conditions that cause significant inconvenience and, if caution is not exercised, could lead to situations that may threaten life and/or property.

  • Monthly Storm Data is Available Here

  • Severe Weather Myths are Available Here

  • Top 10 Myths of Lightning Safety are Available Here

  • Information on the Change to 1 Inch Hail Criteria Beginning January 1, 2010 is Available Here

US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
San Joaquin Valley Weather Forecast Office
900 Foggy Bottom Road
Hanford, CA 93230-5236

Tel: (559) 584-3752

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