National Weather Service United States Department of Commerce

Locally Heavy Rainfall Possible Over the Four Corners; Critical Fire Weather Conditions in the Great Basin

Monsoon moisture will result in locally heavy showers and thunderstorms over the Four Corners region, which could lead to flash flooding. While, critical fire weather threats are expected for much of the Great Basin, from dry and windy conditions. Finally, Tropical Cyclone Humberto remains well offshore of the Southeast, but rip currents and heavy surf are expected from Florida to the Carolinas. Read More >


The August  2019 climate summaries for Big Piney, Buffalo, Casper, Greybull, Lake Yellowstone, Lander, Riverton, Rock Springs, and Worland are now available online.

August 2019 was warmer across the Cowboy State for most of our climate sites. The warmest daily temperatures happened on the 6th and again on the 19th. Casper, Greybull and Riverton all broke daily high records on the 19th. The lowest temperatures recorded in August occurred between the 26th and 28th. Lake Yellowstone even tied their daily low record on the 26th, dropping to just 29 degrees. Precipitation totals across the climate locations were mainly below normal for the month with the exception of Buffalo and Worland. Big Piney had their driest August on record with just a trace of rain. This is since records were started in 1998. A few daily rainfall records fell in August as well.   Check the CLMs for more specifics on daily records set at the various locations. See the links below for details for individual sites or click here for Water Year Precipitation summaries for more locations.

If you would like additional, or more in-depth climate information, please refer to our Climate Page. From the Riverton Home Page, hover over the "Climate and Past Weather" tab, and select the "Local" option. You can then find the Daily Climate Report (CLI), the Preliminary Monthly Climate Data (CF6), the Monthly Weather Summary (CLM), and the Regional Summary (RTP). The Daily Climate Report will have the weather data for the day (from midnight to 1159 pm). The Monthly Climate Data will have this data for each day of the month, compiling all the daily data into one form. The Regional Summary will have temperature and precipitation data for various locations across the state, updated 3 times a day.


Big Piney




Lake Yellowstone



Rock Springs


Big Piney had the driest August since records have been kept starting in 1998.