Hydrologic Outlook issued May 27 at 12:12PM MDT by NWS Riverton WY

ESFRIW

Showers and thunderstorms will continue to develop over Johnson
County this afternoon and evening. Weather models depict a nearly
stationary boundary, focused on the eastern foothills of the Bighorn
Mountains. With precipitable water values in the 0.7 to 0.8 inch
range, which is well above normal, it’s worth watching this area for
training storms and isolated flash flooding. There is a low chance
for flooding in any given location, but the low-end potential is
there today given the ingredients present. By midnight,
thunderstorms and higher rainfall rates are forecast to end, but
light rain lingers through sunrise Wednesday, with another round of
showers Wednesday afternoon.