This application allows you to search for National Weather Service Watch,
Warning, and Advisories. There are currently two options:
Troubles downloading Excel File?
It turns out that making an export to Excel option that works for all
variants of Microsoft Office and web browsers is very difficult. Here are
some tips.
- When you "Export to Excel", you should get a file saved in your downloads
folder with a .xml ending.
- When you double click this .xml file, Microsoft Windows may not know
what to do with the file. Try opening Excel first and then go to
File -> Open to attempt to open the file.
- If that fails, attempt to right click the file and go to 'Open With'
and then select Excel from the available options.
1. Search for Storm Based Warnings by Point
The official warned area for some products the NWS issues is a polygon.
This section allows you to specify a point on the map below by dragging the
marker to where you are interested in. Once you stop dragging the marker, the
grid will update and provide a listing of storm based warnings found.
2. Search for NWS Watch/Warning/Advisories Products by County/Zone or by Point
The NWS issues watch, warnings, and advisories (WWA) for counties/parishes. For
some products (like winter warnings), they issue for forecast zones.
In many parts of the country, these zones are exactly the
same as the counties/parishes. When you get into regions with topography,
then zones will start to differ to the local counties.
This application allows you to search the IEM's archive of NWS WWA products.
Our archive is not complete, but there are no known holes since 12 November 2005.
This archive is of those products that contain VTEC codes, which are nearly all
WWAs that the NWS issues for. There are Severe Thunderstorm, Tornado, and
Flash Flood Warnings included in this archive for dates prior to 2005. These
were retroactively assigned VTEC event identifiers by the IEM based on some
hopefully intelligent logic.
Please note: NWS forecast offices have
changed over the years, this application may incorrectly label old warnings as coming from
an office that did not exist at the time.
Also note: This particular search interface will return
false-positives for some warnings that are now fully polygon/storm based. The IEM
database tracks the UGC areas associated with the storm based warnings. So querying
by UGC (even if you query by point), will return some warnings that were not actually
active for that point, but were technically active for that UGC of which the point
falls inside of. Please use the above search for these types of warnings!
