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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.
Its main usage is to determine the probabilities of a tornado inside a Tornadic Vortex Signature on the rear flank of a storm, to better alert potential high-risk areas for tornadoes and to easily track them. With the help of NEXRAD weather radar data, mesoscale models and algorithms, the index is measured on a scale of 0 to 10. The higher the ...
This is a list of mesoscale discussions concerning specific ongoing tornadoes. Convective mesoscale discussions are issued by the National Oceanic and Atmospheric Administration’s Storm Prediction Center based on the National Weather Center in Norman, Oklahoma.
TORCON uses a 0-10 scale to indicate how likely a tornado is within 50 miles of a given location, according to Weather Station Advisor. A TORCON level of 2 would mean a 20% risk of a tornado ...
The end of April 2021 marks an entire decade since a severe weather event that the National Weather Service called "one of the most active, destructive, and deadly" in U.S. history for tornadoes ...
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 ...
10 1 1986: 765 0 354 271 116 21 3 0 1987: 656 0 340 239 62 12 3 0 1988: 702 0 283 311 81 24 3 0 1989: 856 0 369 364 102 10 11 0 1990: 1,133 0 537 385 155 41 12 3 1991: 1,132 0 688 295 103 39 6 1 1992: 1,313 0 699 427 129 44 13 1 1993: 1,173 0 733 324 80 30 6 0 1994: 1,082 0 694 272 81 30 5 0 1995: 1,185 0 822 234 98 20 11 0 1996: 1,173 0 743 ...
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 ...