Typhoon Mekkhala, locally named Francisco in the Philippines, intensified into a typhoon east of Luzon on Sunday, June 21, 2026, and is forecast to strengthen to 165 km/h (103 mph) while tracking west-northwestward across the Philippine Sea, according to PAGASA and the Joint Typhoon Warning Center (JTWC).
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.
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.
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.
A Moderate Risk (Level 4 of 5) for severe thunderstorms has been issued for parts of Indiana and Illinois through June 17, 2026. Wind gusts of over 120 km/h (75 mph), damaging hail and multiple tornadoes are forecast across the region as the storm system moves through the Midwest.
Heavy rainfall, flash flooding, storm surge, and isolated tornadoes are expected across portions of the Gulf Coast as Potential Tropical Cyclone One tracks along the Texas coast on June 17, 2026. While the system is unlikely to develop into a tropical cyclone, it could bring rainfall totals of up to 500 mm (20 inches) to some areas along with the severe weather.
