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

Dangerous Heat Continues Across the Southwest U.S.; Fire Weather Conditions Across the Great Basin

Dangerous heat will continue across the Southwest U.S. and southern California into early next week. Excessive Heat Warnings and Heat Advisories remain in effect. Gusty winds and dry conditions may lead to elevated to near critical fire weather conditions across the Great Basin and northern Sierra. Air Quality Alerts remain in effect into Monday for large parts of Oregon, Idaho, and Wyoming. 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*