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Thunderstorm Occurrence

North AmericaPhysical Environment

Thunderstorm occurrence in North America

NOAA

Thunderstorms per year in North America: The highest occurrence region (light brown), includes Texas, Oklahoma, and Kansas. Western U.S.(California, Nevada), and northern Canada (Yukon, Northwest Territories), have the lowest occurrences (black).

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Thunderstorm Occurrence

Major Waterfalls and Cataracts

Manganese Mines

Oil Slicks (1990s)

100 and above

81–100

71–80

61–70

51–60

41–50

31–40

21–30

11–20

6–10

2–5

1 and below

Alexandra Falls

Athabasca Falls

Baileys Chute

Celilo Falls

Cohoes Falls

Cumberland Falls

Great Falls

Kettle Falls

Kootenai Falls

Little Falls

Louise Falls

Marcus Falls

Niagara Falls

Osprey Falls

Rearguard Falls

Sandstone Falls

Sherars Falls

Vermilion Falls

Virginia Falls

Waterloo Falls

Willamette Falls

Manganese Mines

Oil Slicks (1990s)

Yukon
7.00%59.8%26.1%7.10%
Idaho
5.95%12.1%9.81%31.7%
Nunavut
1.70%21.4%1.54%
North Dakota
95.7%4.33%
Saskatchewan
18.8%50.7%20.5%
Nebraska
38.0%62.0%
Missouri
100%
New Brunswick
31.5%64.2%2.38%
Kansas
100%
Wisconsin
19.7%79.8%
Newfoundland and Labrador
2.13%3.18%1.22%
Michigan
4.25%65.7%11.8%
Québec
9.73%2.25%18.5%22.7%14.4%
Manitoba
3.86%21.7%27.1%47.3%
Oklahoma
94.0%6.04%
South Dakota
61.9%38.1%
Minnesota
22.5%75.0%2.49%
Iowa
30.7%69.3%
Northwest Territories
5.77%26.0%42.2%3.09%111
Alberta
2.96%41.2%52.3%11
Arizona
8.64%10.8%6.36%10.3%8.92%4.76%48
Utah
6.90%15.9%5.97%15
Wyoming
5.38%5.86%13.2%1
Montana
1.73%42.7%23.7%7.99%124
Oregon
7.84%63.3%28.9%111117
New Mexico
3.65%6.22%12.8%2.01%14.3%3
South Carolina
1.10%75.7%23.2%1
Colorado
13.8%53.9%10.3%3.14%15
Nevada
13.2%33.3%53.5%2
California
46.0%7.90%27.9%202
Alaska
7.66%55.2%19.9%0.113%
District of Columbia
100%100%
Florida
9.02%56.6%20.8%3.46%0.837%
New Hampshire
94.4%5.56%57.6%
Rhode Island
3.91%95.0%
Vermont
100%5.93%
Washington
1.35%57.1%1.44%10.496%
Maine
79.8%14.7%5.13%5.06%
Kentucky
41.2%58.8%139.9%
Nova Scotia
19.0%8.02%1.05%
Virginia
5.25%53.9%38.5%2.22%162.1%
Delaware
99.2%99.3%
Prince Edward Island
98.5%0.308%
Mississippi
13.6%19.8%65.6%29.7%
West Virginia
97.0%3.04%123.63%
Texas
1.43%21.8%34.0%42.5%19.3%
Louisiana
2.08%60.9%36.6%189.8%
Hawaii
1.73%
North Carolina
16.4%81.1%2.09%16.0%
Alabama
14.4%11.5%12.9%58.4%8.82%
British Columbia
1.59%35.7%19.7%2.10%11110.210%
New Jersey
28.5%71.2%99.2%
Connecticut
99.9%99.9%
Pennsylvania
14.0%81.5%4.50%24.2%
Massachusetts
91.5%6.67%298.1%
Georgia
2.02%11.8%34.0%52.1%30.104%
New York
42.9%2.90%1226.9%
Maryland
11.3%16.7%71.1%76.4%
Tennessee
95.3%4.67%11.03%
Ontario
2.04%56.2%35.4%2.08%112.30%
Arkansas
100%30.397%
Ohio
77.5%20.4%18.7%
Indiana
1.92%97.6%44.2%
Illinois
38.2%58.7%3.07%6.79%
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