South Dakota, Wyoming Red Flag Warning | Effective 05/10/2026 21:24

...RED FLAG WARNING IN EFFECT MONDAY AFTERNOON THROUGH EARLY EVENING ACROSS THE WESTERN SOUTH DAKOTA PLAINS... .Hot, dry, and windy conditions on Monday will support widespread critical fire weather conditions across the western South Dakota plains. Temperatures tomorrow will be in the upper 80s to mid 90s with humidities dropping to 10-20 percent. Gusts of 25 to 40 mph are also expected. A dry cold front will cross western South Dakota in the afternoon and early evening, bringing quickly- changing wind shifts and continued higher gusts. In this environment, any new fires could spread rapidly and be difficult to control. The National Weather Service in Rapid City has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 11 AM to 9 PM MDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 327 Butte County Area, 328 Perkins County and 330 Ziebach County. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...The combination of hot temperatures, gusty winds, and low relative humidity would produce critical fire weather conditions. In addition, a dry cold front will cross the region from northwest to southeast between 2 PM and 8 PM Monday, resulting in a sudden wind shift from south to northwest and an increase in wind gusts. In this environment, any new fires could spread rapidly and be difficult to control. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions.