Severe Weather
Where most tornadoes occur in the U.S.?
Central or mid-western part of the U.S.
Where is a tornado located on a supercell?
At the base.
How are volcanic eruptions primarily measured?
Volcanic Explosivity Index (VEI)
What is the minimum threshold for a megaquake?
Magnitude 8.5
This code prompts us to go into Emergency Operations.
Code Violet
What is the primary hazard from a derecho?
Widespread straight-line wind damage
This product is used to help us determine where a tornado is in a storm.
Correlation Coefficient (CC)
What is the world's most active volcano?
Kilauea, HA
What is the IWAT earthquake threshold?
Magnitude 5.5+
This code is issued when Derechos are possible or occurring.
Code Amber
A tornado with a wind speed of 167 MPH is classified as this.
EF-4
This radar product derived from radar velocity data and helps identify areas of strong rotation within a storm.
NROT
A tectonic belt of volcanoes and earthquakes about 40,000 km long and up to about 500 km wide, and surrounds most of the Pacific Ocean
Pacific Ring of Fire
This NOAA system is used for tsunami detection.
Deep-ocean Assessment and Reporting of Tsunamis (DART®)
This is issued when destructive storms are active.
Code Purple
In the Northern Hemisphere, mesocyclones typically rotate in which direction?
Counterclockwise, anti-cyclonic.
This term is based on how bands of rain showers or thunderstorms react when the storm's strong winds reach the surface and spread horizontally.
Bow Echo
What number is the Erupting status for volcanos?
4/5
A tsunami with potential for strong currents or waves dangerous to those in or very near the water is expected or occurring is what type of tsunami alert?
Tsunami Advisory
This is issued by IWS Executives for an ENHANCED risk of severe weather.
TORDEX-3
What is the primary mechanism behind the formation of a supercell thunderstorm?
Strong vertical wind shear combined with conditional instability
A weather boundary, specifically a narrow zone separating moist and dry air masses
Dryline
What is a FL050 in an Ash advisory?
Flight level of 5,000 ft.
A 7.6 magnitude earthquake prompts this code.
Code Red Level 3 Earthquake Warning
When do we go into Code Red for Severe Weather?
Tornadic activity of 3 TORs or more, 1 or more TORR, or a PDS Tornado Watch is issued, or the threat forecasted as a 10% or greater risk or is already in progress