SEVERE STORMS II

Chapter 19Test 5 material

End

TORNADOES

• ARE RAPIDLY ROTATING WINDS THAT BLOW AROUND A SMALL AREA OF INTENSE LOW PRESSURE

• DIAMETERS ARE BETWEEN 300-1800 FEET BUT SOME ARE ONLY A FEW FEET WIDE TO MORE THAN ONE MILE WIDE

• 90% OF THE TIME THEY MOVE FROM SOUTHWEST TO NORTHEAST BUT THEY CAN COME FROM ANY DIRECTION

• GROUND SPEEDS CAN BE OVER 80 MPH BUT OFTEN ARE VERY UNPREDICTABLE

• LAST ONLY A FEW MINUTES• HAVE PATH LENGTH OF ABOUT 4

MILES• DEADLIEST TORNADOES OCCUR IN

FAMILIES

SUPER OUTBREAK

• 1974 XENIA, OHIO• 148 TORNADOES• LASTED 16 HOURS• 13 STATES• 307 DEATHS

TRI-STATE TORNADO

• MISSOURI-ILLINOIS-INDIANA• OCCURRED IN 1925 WITH 7

TORNADOES• 695 PEOPLE WERE KILLED• SOME TOWNS WERE WIPED OFF

THE MAP

TORNADO ALLEY IN CENTRAL PLAINS

• TEXAS• OKLAHOMA• KANSAS• NEBRASKA• MISSOURI

WHEN DO THEY OCCUR?

• 3/4 OCCUR FROM MARCH TO JULY• 4PM TO 6PM IS PRIME TIME WHEN

SURFACE AIR IS MOST UNSTABLE• CAN OCCUR ANY DAY OF THE YEAR

AND AT ANY TIME

TORNADO WINDS CAN:

• DESTROY BUILDINGS• UPROOT TREES• PICK UP OBJECTS• DRIVE OBJECTS THROUGH METAL

OR TREES• CAUSE CHICKENS TO LOSE THEIR

FEATHERS

MYTH OR FACT?

• OPEN WINDOWS• CLOSE WINDOWS• LEAVE WINDOWS ALONE

MYTH OR FACT?

• GO TO SOUTHWEST CORNER OF BASEMENT

• GO TO ANY CORNER OF THE BASEMENT

• GO TO THE CENTER OF THE BASEMENT

MYTH OR FACT?

• DRIVE YOUR CAR AT A RIGHT ANGLE TO THE STORM TO ESCAPE A TORNADO

• DRIVE STRAIGHT TOWARD THE TORNADO

• GET OUT OF YOUR CAR AND GET INTO THE NEAREST DITCH

SHOULD I STAY OR SHOULD I GO?

• MOBILE HOME? (BYE, BYE, MISS AMERICAN PIE)

• MALL?• GYM?

FUJITA SCALE

• F0 = 40 -72 MPH• F1 = 73-112 MPH• F2 = 113-157 MPH• F3 = 158-206 MPH• F4 = 207-260 MPH• F5 261-318 MPH

INTERACTIVE TORNADO

• CAN YOU GUESS THE FUJITA NUMBER & WHEN WILL THE COW FLY THROUGH THE AIR?

• http://whyfiles.org/013tornado/3.html

CLOUDS ASSOCIATED WITH TORNADOES

• WALL CLOUD• MAMMATUS• FUNNEL CLOUD - ELEPHANT

TRUNK, WEDGE, CONE, CYLINDER, AMORPHOUS

• SUCTION VORTICES

SEVERE STORM WATCH

• ISSUED BY STORM PREDICTION CENTER IN KANSAS CITY MEANING CONDITIONS ARE POSSIBLE

SEVERE STORM WARNING

• MEAN THUNDERSTORMS HAVE BEEN VISUALLY SPOTTED BY OBSERVER OR BY RADAR

TORNADO WATCH

• ISSUED BY STORM PREDICTION CENTER MEANING CONDITIONS ARE FAVORABLE

TORNADO WARNING

• ISSUED BY LOCAL WEATHER SERVICE MEANING ONE HAS BEEN SPOTTED VISUALLY OR BY RADAR

TORNADO PROJECT

• http://www.tornadoproject.com/

HURRICANES

• INTENSE WARM CORE CYCLONE THAT DEVELOPS OVER TROPICAL WATERS

• ALSO KNOWN AS CYCLONES OR TYPHOONS

STORM SURGE

• WALL OF WATER THAT LIFTS UP IN FRONT OF HURRICANE AS STORM APPROACHES SHALLOWER WATER

• MOST DEVASTATING ASPECT OF THE HURRICANE

WIND CLASSIFICATION

• WINDS LESS THAN 39 MPH = TROPICAL DEPRESSION

• WINDS BETWEEN 39 AND 73 MPH = TROPICAL STORM

• WINDS GREATER THAN 74 MPH = HURRICANE

HURRICANE CATEGORY WITH STORM SURGE

• 1 = 74-95 MPH 4-5 FEET• 2 = 96-110 MPH 6-8 FEET• 3 = 111-130 MPH 9-12 FEET• 4 = 131-155 MPH 13-18 FEET• 5 = 155+ MPH 18+ FEET

HURRICANE CAMILLE

• AUGUST 17TH, 1969 HIT MISSISSIPPI COAST

• 200 MPH WINDS• 24.2 STORM SURGE ABOVE M.S.L.• 258 DEATHS WITH 68 MISSING

AND PRESUMED DEAD• RICHELIEU APARTMENTS – 24

PEOPLE AT HURRICANE PARTY

HURRICANE ISABEL OFF COAST

Hopefully your finals go better than they did for Kellie Pickler

• http://www.youtube.com/watch?v=uEP7uti0PDw&feature=related