NWS Greenville-Spartanburg Criteria for Non-Precipitation Watches/Warnings/Advisories

Severe Thunderstorm and Heavy Rainfall Threats for the Center of the Nation; Near Record Warmth for the East

Active weather for the center of the nation today. Severe thunderstorms and flash flooding concerns over portions of the Central and Southern Plains into the Mississippi Valley today into tonight. Meanwhile, cool and snowy in parts of the Northwest and Great Basin with above average and potentially record breaking temperatures for the Ohio Valley and Mid-Atlantic. Read More >

NWS Greenville-Spartanburg Criteria for Non-Precipitation Watches/Warnings/Advisories
Hazard Type	Watch/Warning Name Criteria	Advisory Name Criteria
Heat	Excessive Heat Warning Heat Index 110 or greater	Heat Advisory Heat Index 105 or greater but less than 110
Wind (Non-Thunderstorm)	High Wind 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 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

NWS Greenville-Spartanburg Criteria for Non-Precipitation Watches/Warnings/Advisories

Hazard Type

Watch/Warning Name
Criteria

Advisory Name
Criteria

Heat

Excessive Heat Warning
Heat Index 110 or greater

Heat Advisory
Heat Index 105 or greater but less than 110

Wind (Non-Thunderstorm)

High Wind 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 Warning
Low temperature of 32 degrees or less during the Growing Season*