| Issued for | Warning | % Correct |
|---|---|---|
| Strong rotation in a thunderstorm has been indicated by radaror tornado has been sighted by people | Tornado warning | 97%
|
| Hurricane conditions are expected within the specified coastal or inland area within 24 to 36 hours | Hurricane warning | 79%
|
| Flooding of streams or rivers is occurring, imminent, or highly likely | River flood warning | 71%
|
| 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 | Blizzard warning | 68%
|
| Earthquake warning is ongoing or imminent | Earthquake warning | 66%
|
| Flash flooding is occurring, imminent, or highly likely in the short term | Flash flood warning | 66%
|
| High-end tornado warning issued for when a potentially violentand destructive tornado is expected to impact a heavily populated area | Tornado emergency | 63%
|
| A tsunami with the potential of causing widespread coastal flooding by power currents and likely to cause significant damage to property | Tsunami warning | 63%
|
| A severe thunderstorm is indicated by radar or sighted by people | Severe thunderstorm warning | 61%
|
| 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) | Extreme heat warning | 58%
|
| Volcanic activity that is ongoing or imminent | Volcano warning | 58%
|
| Dust reducing visibilities to near zero, caused sustained winds over 25 mph (40 kph) | Blowing dust warning | 55%
|
| Widespread or localized blowing dust reducing visibilities to 1/4 miles or less | Dust storm warning | 55%
|
| Tropical storm conditions are expected to specified coastal or inland area with 24 to 36 hours | Tropical storm warning | 55%
|
| Avalanche activity is ongoing or imminent and likely to affect activities and threaten life/property | Avalanche warning | 53%
|
| Major, uncontrolled fire currently burning in a populated area or near major roadways with evacuation recommended | Fire warning | 53%
|
| Dangerous cold air air temperatures and/or wind chills, capable of causing frostbite, hypothermia, or death | Extreme cold warning | 50%
|
| Widespread flooding is occurring, multiple water rescues have been reported, or if highly populated regions are undergoing significant flooding | Flash flood emergency | 50%
|
| 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 | Red flag warning | 47%
|
| Minimum shelter temperatures forecasted to be 32 °F (0 °C) or below within 12 to 36 hours | Freeze warning | 45%
|
| Heavy ice accumulations that rage from 1/4 to 1/2 inch (6.4 to 12.7 mm) | Ice storm warning | 42%
|
| Large tornado has been confirmed to be producing damage andis moving into and through the warning area | PDS tornado warning | 42%
|
| Widespread, life-threatening flash flooding | PDS flash flood warning | 39%
|
| A significant severe thunderstorm has been detected by radar and/or observed by weather spotters or other people | PDS severe thunderstorm warning | 39%
|
| Hazardous winter weather conditions that pose a threat occurring, imminent,or highly likely with 12 to 48 hours | Winter storm warning | 39%
|
| Sustained wind events over 100 knots (120 mph; 190 kph) | Extreme wind warning | 37%
|
| 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 | Special marine warning | 37%
|
| Hurricane conditions are expected within the specified coastal or inland area with 24 hours (used by NWS Guam) | Typhoon warning | 37%
|
| 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) | Gale warning | 34%
|
| A intense period of moderate to heavy snowfall reducing visibility to less than 1/4 mile; possibly lightning, flash freezes, and blowing snow | Snow squall warning | 34%
|
| Localized heavy flooding with a tropical cyclone from storm surge waves moving inland occurring or imminent within 36 hours | Storm surge warning | 34%
|
| Coastal flooding from ocean water being forced from the nearby body is occurring, imminent, or highly likely within 12 to 24 hours | Coastal flood warning | 32%
|
| When a specified hazard is approaching advisory criteria or to highlight significant weather events | Special weather statement | 32%
|
| 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 | Areal flood warning | 26%
|
| Destructive, pound surf posing an heightened danger to life to property in or near the surf zone | High surf warning | 26%
|
| Lakeshore flooding that poses a threat to life/property occurring or imminent in the next 12 to 24 hours | Lakeshore flood warning | 24%
|
| The release of non-radioactive hazardous material that may require a evacuation or shelter-in-place | Hazardous materials warning | 11%
|
| 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 | Seiche warning | 11%
|
| Sustained winds or frequent gusts over 64 knots (74 mph; 119 kph) not related to a cyclone | Hurricane force wind warning | 8%
|