This image was
uploaded in the JPEG format even though it consists of non-photographic data. This information could be stored more efficiently or accurately in the PNG or
SVG format. If possible, please upload a PNG or SVG version of this image without
compression artifacts, derived from a non-JPEG source (or with existing artifacts
removed). After doing so, please tag the JPEG version with {{Superseded|NewImage.ext}} and remove this tag. This tag should not be applied to photographs or scans. If this image is a diagram or other image suitable for
vectorisation, please tag this image with
{{Convert to SVG}} instead of
{{BadJPEG}}. If not suitable for vectorisation, use
{{Convert to PNG}}. For more information, see
{{BadJPEG}}.
Map track of all four derechos from the July 1995 Heat Wave derecho event (courtesy of NOAA) http://www.spc.noaa.gov/misc/AbtDerechos/casepages/jul1995derechopage.htm
File history
Click on a date/time to view the file as it appeared at that time.