A Red Flag Warning remains in effect across large parts of Interior Alaska until 22:00 AKDT (06:00 UTC June 22) on June 21, 2026. Scattered thunderstorms capable of producing lightning along with low humidity, hot temperatures, and gusty winds to create critical fire weather conditions in the region.
A multi-day severe weather outbreak is forecast to affect large portions of the central and eastern United States through Tuesday, June 23, 2026. Forecasters are warning of scattered to widespread flash flooding in parts of Nebraska, Kansas, and Missouri under a Moderate Risk of excessive rainfall, while severe thunderstorms capable of producing very large hail, damaging winds, and tornadoes develop across the Plains and Midwest.
The National Weather Service (NWS) Central Illinois office confirmed seven tornadoes across central Illinois following severe thunderstorms on June 17, 2026, including an EF3 tornado with peak winds of 241 km/h (150 mph) that tracked 42.2 km (26.2 miles) through Effingham County and injured two people. The surveys documented tornadoes affecting portions of Effingham, Jasper, Coles, Menard, Sangamon, Christian, Macon, Shelby, and Moultrie counties.
A train was derailed in Warren County, Illinois, as severe storms brought winds of up to 161 km/h (100 mph) across the region on June 17, with National Weather Service surveys confirming three EF-1 tornadoes in Illinois and Iowa.
The Storm Prediction Center (SPC) has placed portions of the Central Plains including parts of Kansas and Nebraska under an Enhanced Risk of severe thunderstorms for Saturday, June 20, 2026. Large to very large hail, damaging winds exceeding 121 km/h (75 mph), and tornadoes possible from afternoon into evening hours.
What appeared to be human remains were discovered inside a home destroyed by the Upriver Fire in Spokane County, Washington, on June 17, 2026, as investigators examined a property where a resident was reported missing after allegedly declining evacuation orders. The fire destroyed at least 12 homes and forced large-scale evacuations.
One person died as flooding linked to the remnants of Tropical Storm Arthur prompted water rescues, evacuations, and road closures across parts of Mississippi and Louisiana on June 18, 2026. A dam in the Swan Lake in northern Harrison County was damaged in Mississippi while up to 610 mm (24 inches) of rain fell in parts of Louisiana.
Multiple reported tornadoes affected parts of the Midwest on June 17, 2026, causing widespread damage in Illinois. At least one person was injured in Coles County after a reported tornado touched down near Mattoon. Severe damage and gas leaks were reported in Effingham, while a Local State of Emergency was declared for Charleston due to the storm damage.
Two teenage girls died and a 40-year-old woman remained missing as of June 17, 2026 after four members of the same family became trapped by rising water near the dam at Springfield Lake in Missouri at 16:30 LT on June 14. A 12-year-old was rescued shortly after the incident, while search operations involving more than 40 responders continued for the missing woman.
Tropical Storm Arthur formed about 100 km (60 miles) east-northeast of Port O’Connor, Texas on June 17, 2026 and is forecast to move northeastward along the Gulf Coast before tracking inland over southwestern Louisiana.
