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Issued for
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Warning
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Strong rotation in a thunderstorm has been indicated by radar or tornado has been sighted by people |
Tornado warning
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Large tornado has been confirmed to be producing damage and is moving into and through the warning area |
PDS tornado warning
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High-end tornado warning issued for when a potentially violent and destructive tornado is expected to impact a heavily populated area |
Tornado emergency
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A severe thunderstorm is indicated by radar or sighted by people
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Severe thunderstorm warning
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A significant severe thunderstorm has been detected by radar and/or observed by weather spotters or other people |
PDS severe thunderstorm warning
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Flash flooding is occurring, imminent, or highly likely in the short term
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Flash flood warning
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Widespread, life-threatening flash flooding
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PDS flash flood warning
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Widespread flooding is occurring, multiple water rescues have been reported, or if highly populated regions are undergoing significant flooding |
Flash flood emergency
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Hazardous winter weather conditions that pose a threat occurring, imminent, or highly likely with 12 to 48 hours |
Winter storm warning
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Sustained winds or frequent gusts of 35 mph (56 kph) or greater, heavy snowfall, and visibility less than 1/4 mile (0.4 km) forecasted to occur for over three hours
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Blizzard warning
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Heavy ice accumulations that rage from 1/4 to 1/2 inch (6.4 to 12.7 mm)
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Ice storm warning
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A intense period of moderate to heavy snowfall reducing visibility to less than 1/4 mile; possibly lightning, flash freezes, and blowing snow
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Snow squall warning
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Major, uncontrolled fire currently burning in a populated area or near major roadways with evacuation recommended
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Fire warning
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Extreme burning conditions favor for combustion and rapid growth of wildifires within 12 to 24 hours that have not seen much precipitation or is in a drought
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Red flag warning
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General or areal flooding of streets, low-lying areas, storm drains, creeks, or small streams with a serious threat to life/property occurring, imminent, or highly likely
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Areal flood warning
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Flooding of streams or rivers is occurring, imminent, or highly likely
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River flood warning
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Coastal flooding from ocean water being forced from the nearby body is occurring, imminent, or highly likely within 12 to 24 hours
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Coastal flood warning
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Localized heavy flooding with a tropical cyclone from storm surge waves moving inland occurring or imminent within 36 hours
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Storm surge warning
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Lakeshore flooding that poses a threat to life/property occurring or imminent in the next 12 to 24 hours
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Lakeshore flood warning
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Rapid, large fluctuation s in water levels in the Great Lakes caused by storms or high winds resulting in lakeshore flooding and critically low water levels at different times
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Seiche warning
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Destructive, pound surf posing an heightened danger to life to property in or near the surf zone
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High surf warning
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A warning to mariners of short-duration hazardous conditions including thunderstorms or squalls with wind gusts of 34 knots (39 mph; 63 kph), 1 inch hail, or waterspouts
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Special marine warning
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Maximum Heat Index values forcasted to meet or exceed 105 °F (41 °C) or up to 3 hours a day with minimum nighttime temperatures above 75 °F (24 °C)
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Extreme heat warning
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Dangerous cold air air temperatures and/or wind chills, capable of causing frostbite, hypothermia, or death
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Extreme cold warning
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Minimum shelter temperatures forecasted to be 32 °F (0 °C) or below within 12 to 36 hours
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Freeze warning
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Tropical storm conditions are expected to specified coastal or inland area with 24 to 36 hours
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Tropical storm warning
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Hurricane conditions are expected within the specified coastal or inland area within 24 to 36 hours
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Hurricane warning
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Hurricane conditions are expected within the specified coastal or inland area with 24 hours (used by NWS Guam)
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Typhoon warning
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Sustained wind events over 100 knots (120 mph; 190 kph)
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Extreme wind warning
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Dust reducing visibilities to near zero, caused sustained winds over 25 mph (40 kph)
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Blowing dust warning
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Widespread or localized blowing dust reducing visibilities to 1/4 miles or less
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Dust storm warning
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Sustained surface winds or frequent gusts of 34 to 47 knots (39 to 54 mph) occurring or forecasted to occur within 24 to 48 hours (not related to tropical cyclones)
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Gale warning
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Sustained winds or frequent gusts over 64 knots (74 mph; 119 kph) not related to a cyclone
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Hurricane force wind warning
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When a specified hazard is approaching advisory criteria or to highlight significant weather events
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Special weather statement
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Avalanche activity is ongoing or imminent and likely to affect activities and threaten life/property
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Avalanche warning
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Earthquake warning is ongoing or imminent
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Earthquake warning
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The release of non-radioactive hazardous material that may require a evacuation or shelter-in-place
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Hazardous materials warning
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A tsunami with the potential of causing widespread coastal flooding by power currents and likely to cause significant damage to property
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Tsunami warning
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Volcanic activity that is ongoing or imminent
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Volcano warning
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