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43 Tornadoes Reported in 5 States

Posted by feww on June 21, 2011

Tornadoes move across North Dakota, Nebraska, Kansas, Iowa and Texas

The strongest tornadoes touched down in Graham and Norton counties (about 10 miles north of Hill City), Kansas, the National Weather Service (NWS) reported.

NWS conducted a storm damage survey and has preliminarily rated one of the tornadoes as an EF3 on the Enhanced Fujita Scale.

Probability of Tornadoes in June

The Maximum Threat: June Tornado Alley Maps Based on 15-Year Data


This map shows the time for maximum probability of tornadoes for the month of June.


This map shows the time for maximum probability of SIGNIFICANT tornadoes (F2 to F5 or EF-2 to EF-5) for the month of June.


This map shows the time for maximum probability of VIOLENT tornadoes (F4 and F5 or EF-4  and EF-5) for the month of June.

The Enhanced Fujita Tornado Scale – Quick Chart

EF0: 65 TO 85 MPH
EF1: 86 TO 110 MPH
EF2: 111 TO 135 MPH
EF3: 136 TO 165 MPH
EF4: 166 TO 200 MPH
EF5: Wind speeds greater than 200 MPH

Related Links

2011 Disasters

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