THE COMBINATION OF A MOIST AND UNSTABLE AIR MASS WITH SLOW MOVINGTHUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY RAIN, WILL BRING A RISK OF FLASH FLOODING WEDNESDAY AFTERNOON AND EVENING.

* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL IS POSSIBLE.

* WHERE...PORTIONS OF SOUTH CENTRAL MONTANA, INCLUDING THE FOLLOWING AREAS, ABSAROKA BEARTOOTH MOUNTAINS, BEARTOOTH FOOTHILLS, BIGHORN CANYON, LIVINGSTON AREA, NORTHERN CARBON, PARADISE VALLEY, PRYOR NORTHERN BIGHORN MOUNTAINS, RED LODGE FOOTHILLS, SOUTHEASTERN CARBON AND SOUTHERN BIG HORN AND NORTH CENTRAL WYOMING, INCLUDING THE FOLLOWING AREAS, NORTHEAST BIGHORN MOUNTAINS AND SHERIDAN FOOTHILLS.

* WHEN...FROM 1 PM MDT THIS AFTERNOON THROUGH LATE TONIGHT.

* IMPACTS...EXCESSIVE RUNOFF MAY RESULT IN FLOODING OF RIVERS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS. RECENT BURN SCARS, INCLUDING THE ROBERTSON DRAW AND EAST SIDE SOUTH OF RED LODGE, AND THE ELK ALONG THE EASTERN SLOPES OF THE BIGHORN MOUNTAINS, ARE AT RISK OF EXPERIENCING FLASH FLOODING AND DEBRIS FLOWS.

* ADDITIONAL DETAILS... - THUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY RAIN ARE EXPECTED THIS AFTERNOON AND EVENING. THESE STORMS MAY CAUSE LOCALIZED FLASH FLOODING. EXPECT STORMS TO BEGIN DEVELOPING OVER THE MOUNTAINS BY 1 OR 2 PM. - HTTP: WWW.WEATHER.GOV SAFETY FLOOD