Pete, not sure what you were asking? Was it if I ever saw some bad weather in Montana in June? A "typical" day in June can have (as you well know), sunny blue skys and 70 degrees, thunderstorms, high wind and snow. But, often after lunch things settle down.
In the summer here our biggest weather problem is often the wind. Sometimes in my area you can reduce the wind by driving half an hour east of Livingston, as far as the Yellowstone goes. The other weather problem on the Stone are mud plugs. Mud plugs are caused by heavy T-storms in YNP in the Lamar, Soda Bute and or the Gardner rivers. A storm can literally send a wall of mud down into the Yellowstone. We need to constantly keep an eye on the weather in YNP and monitor the stream gages for the Lamar, Soda and Gardner. If a mud plug catches you the fishing is done, over for that float.
Knowing that there is a plug coming you can then get ahead of it by driving 50 miles or so in front of it and fish without the mud catching you. Depending on the severity of the storms the plugs usually move through a given river stretch in a day or 2. Then you need to move back up river, towards YNP, and get behind the mud. Mud plugs really do not raise the river much, so as soon as it moves through you are good to go.
An interesting thing about mud plugs is that you can tell where they came from by their color. Brown mud means it came from the Lamar, grey mud means it came from the Gardner. The Lamar mud is about a day behind the Gardner mud.
