Alaska

Arizona

Utah

District of Columbia

Florida

Idaho

New Hampshire

Rhode Island

Vermont

Washington

Wyoming

Montana

Maine

North Dakota

Kentucky

Virginia

Delaware

Mississippi

West Virginia

Nebraska

Texas

Missouri

Louisiana

Hawaii

North Carolina

Oregon

Alabama

New Mexico

Kansas

Wisconsin

British Columbia

New Jersey

South Carolina

Michigan

Connecticut

Pennsylvania

Colorado

Nevada

Massachusetts

Georgia

New York

Maryland

Oklahoma

Tennessee

California

Arkansas

South Dakota

Ohio

Indiana

Minnesota

Iowa

Illinois

None

A map shows average tornado incidences per year in the U.S. The highest incidences (dark brown) are in Oklahoma, parts of Texas, Kansas, and Missouri. The lowest incidences (light yellow) are in Alaska, Washington, Oregon, and California.

Tornado prevalence in the United States per 1,000 square miles per year

Average Number of Tornado Incidences per Year (U.S.)

North America

Tornado Archive

Tornadoes per 1,000 square miles per year

Alberta

Manitoba

New Brunswick

Newfoundland and Labrador

Northwest Territories

Nova Scotia

Nunavut

Ontario

Prince Edward Island

Québec

Saskatchewan

Yukon

A map of North America shows regions based on the number of milk-producing cows. Dark blue (highest numbers) in Texas and California. Light blue is seen in the north of Canada, while moderate blue covers southern Canada and central and northern U S A.

Number of milk cows in North America by state or province

US / CA States

USDA

Milk Cows

Cows

A map illustrates high- and low-pressure zones worldwide for January, with high-pressure zones marked in red and low-pressure zones in blue.

Locations of high- and low-atmospheric pressure at mean sea level during January.

High- and Low-Pressure Zones, January

High-Pressure Zones are found in Western North America (1,022 millibars), Northwest Africa (1,024 millibars), North-central Asia (1,044 millibars), Southeast Pacific (1,018 millibars), South Atlantic (1,022 millibars), South Indian Ocean (1,022 millibars) Low-Pressure Zones are found in North Pacific near the Aleutian Islands (984 millibars), North Atlantic near Greenland and Iceland (992 millibars), along the equator in the Central Pacific Ocean, Central Africa, and Western Pacific Ocean, and around the coasts of Antarctica (three lows at 980 millibars).

Display by:	Average Number of Tornado Incidences per Year (U.S.)					Milk Cows			High- and Low-Pressure Zones, January
	Less than 1	1–5	6–10	11–15	More than 15	Class	Rank	Cows	High
District of Columbia		100%
Alabama		69.5%	16.4%	14.0%			57	2,000
Alaska	99.8%						60	200
Alberta							25	81,000
Arizona	92.2%	7.76%					16	195,000
Arkansas			87.2%	12.8%			55	4,000
British Columbia	2.52%						26	80,500
California	99.9%						1	1,725,000
Colorado	69.4%	30.6%					15	203,000
Connecticut		99.9%					41	18,500
Delaware		99.2%					56	2,600
Florida		64.2%	35.5%				23	92,000
Georgia		61.5%	38.5%				24	92,000
Hawaii	92.1%						58	600
Idaho	100%						3	661,000
Illinois		70.3%	29.6%				27	79,000
Indiana		62.9%	37.1%				17	187,000
Iowa		50.0%	50.0%				14	240,000
Kansas		68.1%	31.5%				19	175,000
Kentucky	4.42%	60.5%	35.1%				31	45,000
Louisiana		30.4%	69.5%				50	8,000
Maine	40.0%	59.8%					39	25,000
Manitoba							32	43,600
Maryland		99.3%					33	40,000
Massachusetts		99.5%					47	9,000
Michigan	34.8%	64.8%					8	432,000
Minnesota	23.4%	72.5%	4.03%				7	455,000
Mississippi		10.9%	74.0%	15.1%			51	6,000
Missouri		23.4%	62.5%	14.1%			29	65,000
Montana	100%						46	10,000
Nebraska		88.6%	11.4%				30	57,000
Nevada	100%						36	33,000
New Brunswick							42	15,900
New Hampshire	1.24%	98.7%					45	10,000
New Jersey	19.5%	80.3%					54	4,100
New Mexico	90.2%	9.71%					11	279,000
New York	61.6%	38.3%					5	630,000
Newfoundland and Labrador							52	5,100
North Carolina		99.9%					35	39,000
North Dakota	29.5%	70.5%					43	14,000
Northwest Territories							63	0
Nova Scotia							40	21,100
Nunavut							62	0
Ohio	3.97%	96.0%					13	250,000
Oklahoma		3.41%	35.1%	46.0%	15.5%		34	39,000
Ontario							10	326,800
Oregon	100%						20	123,000
Pennsylvania	6.15%	93.9%					6	465,000
Prince Edward Island							44	12,700
Québec							9	353,000
Rhode Island		99.3%					59	500
Saskatchewan							37	28,800
South Carolina		99.9%					48	9,000
South Dakota	22.1%	76.0%	1.85%				18	187,000
Tennessee		41.3%	58.7%				38	26,000
Texas	16.8%	43.9%	36.9%		2.38%		4	650,000
Vermont	77.1%	22.6%					21	118,000
Virginia	10.3%	89.6%					28	67,000
Washington	99.9%						12	254,000
West Virginia	48.2%	51.8%					53	5,000
Wisconsin	13.1%	53.1%	33.7%				2	1,270,000
Wyoming	87.7%	12.3%					49	9,000
Yukon							61	0
Utah	100%						22	92,000	1

MapMaster 3

Average Number of Tornado Incidences per Year (U.S.)