From: 2026/04/21, 12:48
To: 2026/04/22, 06:00

...RED FLAG WARNING IN EFFECT LATE WEDNESDAY MORNING THROUGH EARLY EVENING ACROSS NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA... .Hot, dry, and windy conditions will support widespread critical fire weather conditions Wednesday, mainly in the afternoon and evening. Temperatures tomorrow will range from the 80s to mid 90s with minimum humidities dropping to as low as 10%. Meanwhile, southwesterly winds will increase through the morning as a cold front approaches the region. Sustained winds will be at 20 to 30 mph with gusts of 35 to 45 mph. Scattered thunderstorms are possible across western to central South Dakota Wednesday afternoon and evening. These storms may contain cloud-to-ground lightning and erratic winds with gusts in excess of 50 mph while producing very little precip. This could lead to fire initiation. Conditions will improve Wednesday evening as temperatures fall, humidity rises, and a cold front quickly crosses the area. 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 10 AM MDT /11 AM CDT/ to 8 PM MDT /9 PM CDT/ Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 314 Northern Campbell, 315 Southern Campbell, 316 Crook County Plains, 317 Weston County Plains, 318 Wyoming Black Hills, 319 Northern Black Hills, 320 Central Black Hills, 321 Southern Black Hills, 322 Fall River County Area, 323 Northern Foot Hills, 324 Eastern Foot Hills, 325 Custer County Plains, 326 Pine Ridge Area, 327 Butte County Area, 329 West Central Plains, 330 Ziebach County, 331 Haakon County Area, 332 Badlands Area, 333 Bennett County Area, 334 Mellette and Todd Counties and 335 Tripp County. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions.