Apex Wx

Moderate Flash Flood Risk Across Parts of the Midwest
Heavy rainfall and flash flooding are expected today into tonight, with a Moderate Risk covering parts of the Midwest. The greatest concern is across central and southern Iowa, west-central Illinois and possibly far northern Missouri, where repeated thunderstorms could produce significant rainfall. A very moist atmosphere and storms that repeatedly move over the same areas may lead to numerous flash floods, especially this afternoon and overnight. The exact location of the heaviest rain remains uncertain, but flooding could develop quickly in vulnerable areas. A Slight Risk for flash flooding also extends into parts of the southern Appalachians. Additional thunderstorms may cause isolated flooding across northeast Colorado and southwest Nebraska, as well as northwest Arizona, southeast Nevada and southwest Utah. Residents should monitor weather alerts and avoid flooded roads.

Heat and Dry Thunderstorms Raise Fire Risks
An expanding area of high pressure will bring another day of dangerous heat and elevated fire-weather conditions across the southern Plains. Temperatures are expected to exceed 100 degrees across parts of the Texas Panhandle, Oklahoma and southern Kansas, while humidity drops below 20% and gusty southwest winds increase the risk of fires spreading quickly. Isolated thunderstorms may also develop near the Oklahoma and Texas Panhandles, with lightning potentially igniting dry vegetation. Farther west, isolated dry thunderstorms are possible from northwestern California through Oregon and into southern Washington this afternoon and evening. These storms may produce little rainfall but frequent lightning, creating a significant wildfire ignition threat where vegetation is very dry. Residents should use caution with outdoor activities and follow local fire restrictions.