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Whilst there exist options to get weather forecasts as open data I cannot seem to find anything relating to weather or flood warnings.

Are current warnings or historical data available as open data in some geographical data format (such as ESRI shape files, or KML files)?

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Here are some US thoughts:

For US warnings/watches, you probably want to go the the storm prediction center, http://www.spc.noaa.gov/wcm/ and you may want to look at the weather related shapefiles http://www.nws.noaa.gov/geodata/ and the current alert system probably has an archive, but I didn't see it on first glance: http://alerts.weather.gov/

I would suggest digging into the census tools related to disaster management.
http://onthemap.ces.census.gov/em/

The "on the map" product is a mashup of (1) weather data and (2) population/business data so that the impact of weather on population/businesses can be assessed.

It is only actual federally designated areas, I do not know if it has warnings/watches.

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  • Whilst that's probably a great help for those in the US, I am primarily interested in the UK – Rowland Shaw Dec 17 '14 at 14:19

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