The water page at the NWS lets you see how much rain has fallen and compare it to long term averages. You can pick the period of time to display, from the current day to the entire past year. You can also look at other states and regions. This may just be the most useful tool for the mushroom hunter on the entire Internet.
Click on adjacent states to see the corresponding precipitation map, or you can show the entire country or the Western States.
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