Severe Weather
Boundary that separates moist and dry air
What is a dry line?
This type of precipitation starts as snow aloft, melts into rain, then refreezes into little ice pellets before hitting the ground.
What is Sleet?
What category would a hurricane with sustained winds of 135kts be?
What is a Category 4 Hurricane
In July 1913, this California desert location recorded a temperature of 134°F, one of the hottest ever measured on Earth.
What is Death Valley?
This layer of the atmosphere, just above the troposphere, is where the ozone layer resides and absorbs most UV radiation.
What is the stratosphere?
How many ratings exist on the Enhanced Fujita Scale
What is 6 (EF0-EF5)?
A storm which contains large amounts of snow OR blowing snow, with winds in excess of 35 mph and visibilities of less than 1/4 mile for at least 3 hours.
What is a Blizzard?
What is the minimum surface SST that supports hurricane formation?
What is 26.5 C (80F)
Strongest Tornado Ever Recorded
Bridge Creek-Moore F5 (1999)
This large-scale, persistent low-pressure system over the polar regions strengthens in winter and can send frigid Arctic air southward when it weakens or shifts.
What is the Polar Vortex?
Minimum wind gust speed within a thunderstorm that warrants a Severe Thunderstorm Warning
What is 58mph (50kts)?
This form of precipitation occurs when snow melts aloft, falls, and then refreezes at the surface.
What is freezing rain?
What is the name of the strongest Tropical Cyclone ever by pressure (In any basin)?
What is Typhoon Tip (Super Typhoon Warling)
Costliest Hurricane in U.S
What is Hurricane Katrina?
A belt of low pressure near the equator where two trade wind patterns converge, driving heavy tropical rainfall.
What is The Intertropical Convergence Zone (ITCZ)?
To qualify as this type of storm, a line of thunderstorms must produce wind damage over at least 240 miles, with wind gusts of 58 mph or greater along most of its path.
What is a Derecho?
This process, whose name literally means “front creation,” occurs when temperature gradients strengthen, often enhancing lift and producing bands of heavy snow.
What is frontogenesis?
How many named storms were there in the Atlantic Ocean in 2020?
What is 30 Named Storms?
Region of heavy rainfall that occurs when deep tropical moisture streaming from an approaching tropical cyclone encounters a "focusing mechanism" like a stalled front or a mountainous region, enhancing rainfall.
What is a Predecessor Rain Event (PRE)?
This type of front forms when a cold front overtakes a warm front, forcing warm air aloft and often producing widespread precipitation.
What is an occluded front?
The most recent EF5 tornado
Moore, OK in 2013
A blizzard that dropped 20+ inches of snow in Baltimore and New York City (2 possible answers)
What is Blizzard of 2016 (Winter Storm Jonas), Blizzard of 1996
How many major landfalling hurricanes made landfall in the U.S since 2017?
9 (Harvey, Irma, Michael, Laura, Zeta, Ida, Ian, Idalia, Helene)
State where snowiest day occurred
What is Colorado (76 inches in Silver Lake, CO 1921)
These strong, dry winds descend from the mountains into Southern California, often fanning wildfires and bringing unusually warm temperatures in the fall and winter.
What are Santa Ana winds?