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Severe weather operations
During severe weather operations we will supplement our staffing with additional
personnel to handle the increased workload. We will often have more than one meteorologist
monitoring the radar. We do this by breaking up our CWA into sectors. This allows
the radar operator to focus on a smaller region that will typically have more
homogeneous meteorological conditions with storms that possess a similar storm structure and severe weather threat.
In addition to the one, two, or three meteorologist actively analyzing the radar
and issuing warnings or statements, other meteorologists will be updating our regular
forecast products, the gridded forecast database, locating ground truth reports of
damage, briefing emergency officials, and relaying damage reports to the public, the media, and other NWS offices.
Once a severe thunderstorm or tornado is anticipated or is observed, a Severe Thunderstorm
Warning or Tornado Warning will need to be issued. We use a program called WarnGen which is
used on AWIPS to quickly and accurately produce severe weather warnings or statements. The
radar operator specifies the required warning type, identifies the current storm location,
creates a forecast track, and then identifies an area (polygon) which is threatened by the
severe weather. The radar operator then specifies the warning duration, adjusts the content
of the warning and selects what safety information (Call to Action Statements) is needed.
The radar operator clicks on a button and WarnGen creates a pop-up window that contains the
text of the severe weather warning. The text automatically includes the counties and cities
in the path of the storm, the speed and direction the storm is moving, and how long the
warning will be in effect for the affected areas. After quickly proofreading the text, the
warning is issued.
Our computer system automatically sends the warning out to the Emergency Alert System, the
NOAA Weather Wire,
and the internet so our users can access the information. The warning is also
relayed immediately to our NOAA All Hazards Radio system which automatically plays the warnings
on radio transmitters in the affected areas. See the next page in the tour for more information
on NOAA All Hazards Weather Radio.
Since the radar can only tell us what is happening in the sky, spotter reports are essential
to severe weather operations. They provide critical feedback on conditions at the ground
allowing us to more effectively interpret and utilize the radar data. They can also pass along
important details such as the extent of storm damage, the size of hailstones, and specific
details on the impacts of flooding in a community.
Event summaries and case studies for dozens of severe weather events are available on our
Event Summaries, Case Studies and Event Maps Web Page.
The most recent short-fused severe weather warnings and statements can be seen below:
Severe Thunderstorm Warning
Severe Weather Statement
Flash Flood Warning
Flash Flood Statement
Special Weather Statement
Local Severe Weather Report
Current Watches, Warnings and Advisories for North Carolina