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watch_warning_criteria [2017/04/13 23:38] sd |
watch_warning_criteria [2017/04/15 01:56] forsythsnow |
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| ===== CHS Charleston ===== | ===== CHS Charleston ===== | ||
| ===== FFC Atlanta ===== | ===== FFC Atlanta ===== | ||
| + | ==== Winter Weather Criteria ==== | ||
| + | * Winter Storm Watch - Issued within 12 - 48 hours of a winter event with at least a 50% chance of occurring. | ||
| + | * Blizzard Watch - Issued 12 - 48 hours before a possible blizzard with the probability of occurring at 50% or greater. A blizzard is defined as frequent wind gusts exceeding 35mph with heavy snowfall reducing visibility to less than 1/4 mile for at least 3 hours. | ||
| + | * Winter Weather Advisory - Issued within 36 hours of a winter event with at least an 80% chance of occurring, but when the threat doesn't exceed those of a winter storm warning. | ||
| + | * Winter Storm Warning - Issued within 36 hours of a storm for snow amounts of 2"+, 1/2"+ of sleet, and or 1/4"+ freezing rain. | ||
| + | * Blizzard Warning - Issued up to 36 hours before a potential blizzard with the probability of occurring at 80% or greater. A blizzard is defined as frequent wind gusts exceeding 35mph with heavy snowfall reducing visibility to less than 1/4 mile for at least 3 hours. | ||
| + | === Freezing Rain === | ||
| + | * Freezing Rain Advisory - Issued within 36 hours of an ice event that has at least an 80% chance of occurring, but in which the threat does not exceed warning criteria. | ||
| + | * Ice Storm Warning - Issued within 36 hours of an ice event that has at least an 80% chance of occurring, in which 1/4"+ of freezing rain is possible. | ||
| + | === Wind Chill === | ||
| + | * Wind Chill Watch - Issued 12 - 48 hours before a time in which there is a 50% or greater chance where the wind chill could be -10F or below. | ||
| + | * Wind Chill Advisory - Issued within 36 hours before a time in which there is an 80% or greater chance of where the wind chil could be between 5F and -10F. | ||
| + | * Wind Chill Warning - Issued within 36 hours before a time in which there is an 80% or greater chance of where the wind chil could be -10F or below. | ||
| ===== GSP Greenville Spartanburg ===== | ===== GSP Greenville Spartanburg ===== | ||
| ===== HUN Huntsville ===== | ===== HUN Huntsville ===== | ||
