SWEETWATER COUNTY -- According to the National Weather Service Office in Riverton: AT 414 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR STATE HWY 430 MILE MARKER 10...WHICH IS 13 MILES SOUTHEAST OF ROCK SPRINGS...MOVING NORTH AT 15 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. A LARGE AMOUNT OF SMALL HAIL MAY OCCUR WITH THIS STORM. HAIL MAY ACCUMULATE ON THE GROUND AND ROADWAYS IN THE PATH OF THIS STORM.