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10: Tornado outbreak of April 6–8, 2006 – Only known high risk to include a 60% tornado contour, the highest level issued by the SPC. [233] It was also the first of only two known occurrences (the other being April 14, 2012) in which a Day 2 high risk outlook was issued, and the High Risk persisted for the entire Day 1 Outlook cycle.
The categorical forecast in the Day 1-3 Convective Outlooks—which estimates a severe weather event occurring within 25 miles (40 km) of a point and derives the attendant risk areas from probability forecasts of tornadoes, damaging winds, and large hail on Days 1 and 2, and a combined severe weather risk on Day 3—specifies the level of ...
The geological record of the region indicates on average, these mega earthquake and tsunami events happen every 500 years. This part of the US is at highest risk for a devastating tsunami Skip to ...
An enhanced risk day indicates that there is a greater threat for severe weather than that which would be indicated by a slight risk, but conditions are not adequate for the development of widespread significant severe weather to necessitate a moderate category, with more numerous areas of wind damage (often with wind gusts of 70 miles per hour ...
A high risk of severe weather is a level 5 on the Storm Prediction Center's 0-5 scale. Monday is the first time in over a year the Storm Prediction Center has issued a high risk warning for severe ...
A TORCON level of 2 would mean a 20% risk of a tornado, TORCON 5 would be 50%, and so on. In this video from The Weather Channel , Forbes explains the TORCON system and how it's used.
PDS tornado watches are issued when there is a significantly higher than normal risk of multiple EF2 or stronger tornadoes – especially those that are predicted to be long-track in nature, with path lengths of more than 20 miles – in the watch area (usually amounting to damage consistent with EF4 or EF5 tornadoes at maximum), in addition to ...
But they found through modeling that the earthquake did produce a 10-foot (3-meter) tsunami — one that went unnoticed because it arrived at 2 a.m. during a minus-16-foot (minus-4.9-meter) low ...