Areas of Extreme Heat and Excessive Rainfall Potential

Dangerous and extreme heat will remain across portions of the central U.S. this week, persisting across the mid to lower Mississippi Valley, Gulf Coast, southern Plains and portions of Texas. A heat wave over the Southwest U.S. will peak this weekend. Heavy to excessive rainfall may produce flash flooding from the Delmarva Peninsula north into the Hudson Valley today and tonight. Read More >

NWS Greenville-Spartanburg Criteria for Non-Precipitation Watches/Warnings/Advisories
Hazard Type	Watch/Warning Name Criteria	Advisory Name Criteria
Cold Weather
Heat	Excessive Heat Watch/Warning Heat Index 110 or greater	Heat Advisory Heat Index 105 or greater but less than 110
Wind (Non-Thunderstorm)	High Wind Watch/Warning Sustained winds higher than 40 mph and/or frequent gusts greater than 57 mph	Wind Advisory Sustained Winds of 31-40 mph, and/or frequent gusts of 46-57 mph
Frost Freeze	Freeze Watch/Warning Low temperature of 32 degrees or less during the Growing Season*	Frost Advisory Scattered to widespread frost is forecast during the Growing Season*
Fog	N/A	Dense Fog Advisory Fog causing widespread visibility of 1/4 mile or less