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watch_warning_criteria [2017/04/17 13:55]
sd 		watch_warning_criteria [2017/04/18 14:48] (current)
pcbjr
Line 25: Line 25:
 ===== JAN Jackson ===== ===== JAN Jackson =====
 ===== JAX Jacksonville ===== ===== JAX Jacksonville =====
 +
 +The JAX main page links here - http://​www.weather.gov/​safety/​ - Apparently JAX does not publish its own criteria.
 +
 ===== LCH Lake Charles ===== ===== LCH Lake Charles =====
 +
 ===== LIX New Orleans ===== ===== LIX New Orleans =====
 ===== LZK Little Rock ===== ===== LZK Little Rock =====
Line 34: Line 38:
 ===== OHX Nashville ===== ===== OHX Nashville =====
 ===== RAH Raleigh ===== ===== RAH Raleigh =====
-WARNINGS +==== Severe Weather ====
- +
-CRITERIA +
- +
-SEVERE THUNDERSTORM WARNING +
-VTEC:  SV.W   +
-WMO: WUUS52 KRAH +
-PIL: SVRRAH+
  
 +**SEVERE THUNDERSTORM WARNING**
 Thunderstorm winds 58 mph (50 kts) and/or hail 1 inch (2.5 cm) or greater Thunderstorm winds 58 mph (50 kts) and/or hail 1 inch (2.5 cm) or greater
  
-TORNADO WARNING +**TORNADO WARNING**
-VTEC: TO.W    +
-WMO: WFUS52 KRAH +
-PIL: TORRAH +
 A tornado has been spotted or detected on radar A tornado has been spotted or detected on radar
  
-FLASH FLOOD WARNING +**FLASH FLOOD WARNING**
-VTEC:  FF.W   +
-WMO: WGUS52 KRAH +
-PIL: FFWRAH +
 Short duration (usually less than six hours), flash flooding resulting from storms with rainfall rates of 1 to 2 inches per hour or greater. Also issued when a dam has failed or when a dam failure is imminent. Short duration (usually less than six hours), flash flooding resulting from storms with rainfall rates of 1 to 2 inches per hour or greater. Also issued when a dam has failed or when a dam failure is imminent.
  
-FLOOD WARNING (AREAL/​COUNTY) +**FLOOD WARNING (AREAL/​COUNTY)**
-VTEC:  FA.W   +
-WMO: WGUS42 KRAH +
-PIL: FLWRAH +
 Long duration (slow to evolve), flooding resulting from steady stratiform rain with rates typically less than 1 inch per hour. Most common during long duration spring rains resulting in widespread flooding. Long duration (slow to evolve), flooding resulting from steady stratiform rain with rates typically less than 1 inch per hour. Most common during long duration spring rains resulting in widespread flooding.
  
-RIVER FLOOD WARNING +**RIVER FLOOD WARNING**
-VTEC: FL.W +
-WMO: WGUS42 KRAH +
-PIL: FLWRAH +
 River flooding is occurring or is forecast for a point. Normally issued when flooding is forecast within 24 hours based on accumulated rainfall, but may also be issued when there is a high confidence in a heavy rain event. River flooding is occurring or is forecast for a point. Normally issued when flooding is forecast within 24 hours based on accumulated rainfall, but may also be issued when there is a high confidence in a heavy rain event.
  
-WINTER STORM WARNING +**HIGH WIND WARNING** 
-VTEC: WS.W    +Non-convective sustained wind speeds 40 mph (35 kt) and greater and/or frequent wind gusts 50 mph (43 kt) and greater or any winds gusts 57 mph (50 kt) and greater 
-WMO: WWUS42 KRAH + 
-PIL: WSWRAH+==== Winter Weather ====
  
 +**WINTER STORM WARNING**
 Snow accumulations 3 inches or greater in 12 hours (4 inches or more in 24 hours); Freezing rain accumulations ¼ inch (6 mm) or greater; Sleet accumulations ½ inch (13 mm)or more. Issued when there is at least a 60% forecast confidence of any one of the three criteria being met. Snow accumulations 3 inches or greater in 12 hours (4 inches or more in 24 hours); Freezing rain accumulations ¼ inch (6 mm) or greater; Sleet accumulations ½ inch (13 mm)or more. Issued when there is at least a 60% forecast confidence of any one of the three criteria being met.
  
-BLIZZARD WARNING +**BLIZZARD WARNING**
-VTEC: BZ.W     +
-WMO: WWUS42 KRAH +
-PIL: WSWRAH +
 Winds 35 mph (30 kts) AND falling and/or blowing snow reducing visibility to less than ¼ mile (1.2 km) for at least three hours Winds 35 mph (30 kts) AND falling and/or blowing snow reducing visibility to less than ¼ mile (1.2 km) for at least three hours
  
-ICE STORM WARNING +**ICE STORM WARNING**
-VTEC: IS.W    +
-WMO: WWUS42 KRAH +
-PIL: WSWRAH +
 Freezing rain accumulations ¼ inch (6 mm) or greater resulting in significant,​ widespread power outages, tree damage and dangerous travel. Issued only in those rare instances where just heavy freezing rain is expected and there will be no "mixed bag" precipitation meaning no snow, sleet or rain. Freezing rain accumulations ¼ inch (6 mm) or greater resulting in significant,​ widespread power outages, tree damage and dangerous travel. Issued only in those rare instances where just heavy freezing rain is expected and there will be no "mixed bag" precipitation meaning no snow, sleet or rain.
  
-WIND CHILL WARNING +**WIND CHILL WARNING**
-VTEC:  WC.W   +
-WMO: WWUS42 KRAH +
-PIL: WSWRAH +
 Wind chill -15ºF or lower with wind speeds 10 mph (9 kt) or greater Wind chill -15ºF or lower with wind speeds 10 mph (9 kt) or greater
  
-FREEZE WARNING +**FREEZE WARNING**
-VTEC: FZ.W    +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 When temperatures will be at or below 32ºF over a large area for a significant time during the growing season When temperatures will be at or below 32ºF over a large area for a significant time during the growing season
  
-HIGH WIND WARNING 
-VTEC: HW.W    
-WMO: WWUS72 KRAH 
-PIL: NPWRAH 
  
-Non-convective sustained wind speeds 40 mph (35 kt) and greater and/or frequent wind gusts 50 mph (43 kt) and greater or any winds gusts 57 mph (50 kt) and greater 
- 
-EXCESSIVE HEAT WARNING 
-VTEC:  HT.W  ​ 
-WMO: WWUS72 KRAH 
-PIL: NPWRAH 
  
 +**EXCESSIVE HEAT WARNING**
 Heat Index of 110ºF or greater for any duration Heat Index of 110ºF or greater for any duration
  
-RED FLAG / FIRE WEATHER +**RED FLAG / FIRE WEATHER**
-VTEC: FW.W    +
-WMO: WWUS82 KRAH +
-PIL: RFWRAH +
 Dangerous fire behavior expected within 12-24 hours based on weather conditions and dry fuels. Generally wind gusts 20 mph (17 kt) or greater, minimum humidity 25% or lower and dry fuels. Coordinated with the NC Division of Forestry. Dangerous fire behavior expected within 12-24 hours based on weather conditions and dry fuels. Generally wind gusts 20 mph (17 kt) or greater, minimum humidity 25% or lower and dry fuels. Coordinated with the NC Division of Forestry.
  
-Advisories ​are issued for weather events that are expected to have a significant,​ but somewhat less overall impact. +==== **Advisories** ====
- +
-ADVISORIES +
- +
-CRITERIA +
- +
-FLOOD ADVISORY  +
-VTEC: FA.Y   +
-WMO: WGUS82 KRAH +
-PIL: FLSRAH+
  
 +**FLOOD ADVISORY** ​
 Localized flooding resulting from heavy rain. Water may start to threaten homes and businesses, and minor flooding of roads is possible Localized flooding resulting from heavy rain. Water may start to threaten homes and businesses, and minor flooding of roads is possible
  
-WINTER WEATHER ADVISORY +**WINTER WEATHER ADVISORY**
-VTEC:​WS.Y ​  +
-WMO: WWUS42 KRAH +
-PIL: WSWRAH +
 Snow accumulations 1-3 inches; Any freezing rain accumulations less than ¼ inch; Any sleet accumulations less than ½ inch. Winter Weather Advisories are issued in any one of the three criteria are forecast to be met Snow accumulations 1-3 inches; Any freezing rain accumulations less than ¼ inch; Any sleet accumulations less than ½ inch. Winter Weather Advisories are issued in any one of the three criteria are forecast to be met
  
-WIND CHILL ADVISORY +**WIND CHILL ADVISORY**
-VTEC:  WC.Y   +
-WMO: WWUS72 KRAH +
-PIL: WSWRAH +
 0ºF to -14ºF with wind speeds 10 mph (9 kt) or greater 0ºF to -14ºF with wind speeds 10 mph (9 kt) or greater
  
-FROST ADVISORY +**FROST ADVISORY**
-VTEC: FR.Y    +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 When frost is expected during the growing season When frost is expected during the growing season
  
-WIND ADVISORY +**WIND ADVISORY**
-VTEC:  HW.Y   +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 Non-convective sustained wind speeds 31-39 mph (27-34 kt); frequent wind gusts 40-45 mph (35-39 kt); any wind gusts 46-57 mph (40-50 kt) Non-convective sustained wind speeds 31-39 mph (27-34 kt); frequent wind gusts 40-45 mph (35-39 kt); any wind gusts 46-57 mph (40-50 kt)
  
-HEAT ADVISORY +**HEAT ADVISORY**
-VTEC:  HT.Y   +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 Heat Index of 105ºF to 109ºF for 3 hours or more. Can also be issued for lower values 100ºF to 104ºF for heat lasting several consecutive days Heat Index of 105ºF to 109ºF for 3 hours or more. Can also be issued for lower values 100ºF to 104ºF for heat lasting several consecutive days
  
-DENSE FOG ADVISORY +**DENSE FOG ADVISORY**
-VTEC:  FG.Y   +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 Fog reducing visibilities to a ¼ mile (0.4 km) or less Fog reducing visibilities to a ¼ mile (0.4 km) or less
  
-DENSE SMOKE ADVISORY +**DENSE SMOKE ADVISORY**
-VTEC: SM.Y    +
-WMO: WWUS72 KRAH +
-PIL: NPWRAH +
 Smoke reducing visibilities to a ¼ mile (0.4 km) or less and/or smoke expected to cause travel hazards. Could be localized or widespread Smoke reducing visibilities to a ¼ mile (0.4 km) or less and/or smoke expected to cause travel hazards. Could be localized or widespread
 ===== SHV Shreveport ===== ===== SHV Shreveport =====