Powerful weather systems like thunderstorms and tornadoes are awesome displays of the force of nature. Now NASA wants to display YOUR photos of extreme weather!

Post your coolest photographs and we'll pick the best ones to feature on the NASA Precipitation Measurement Missions websites (http://pmm.nasa.gov/  & http://www.nasa.gov/GPM).

While we want extreme weather, we don't want YOU to be too extreme. So before you take that photo, please make sure you're keeping safe.

Submission Guidelines:

• Submit your photo's to the GPM Extreme Weather Flickr group: http://www.flickr.com/groups/gpm-extreme-weather/
• Images should be in JPEG (.jpg) format in as high a resolution as possible.
• Please provide as much metadata with the image as you are comfortable providing:
  • Your name.
  • Affiliation (e.g. school, community group, etc...).
  • Location where photo was taken (country, city, state, latitude, longitude).
  • Any other interesting details about the photo.
• The submission period is from 9/4/12 - 9/18/12.
• All photos must be your original property.
• To avoid overwhelming the group, please limit your posts to 10 photos per person.
• No inappropriate content.

Global Precipitation Measurement (GPM) is an international satellite mission that will help advance our understanding of Earth’s water and energy cycles, improve the forecasting of extreme events that cause natural disasters, and extend current precipitation measurement capabilities by using accurate and timely information of rain and snow. Since rainfall and snowfall vary greatly from place to place and over time, satellites can provide more uniform observations of rain and snow around the globe than ground instruments. Learn more about GPM here: http://pmm.nasa.gov/GPM