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MapMaster 3

Days with Heavy Fog

North AmericaPhysical Environment

Average annual number of days in North America with heavy fog, where fog has made driving conditions dangerous

nature

A map illustrates the distribution of days with heavy fog across North America using a color-coded scheme.

Areas with 80 days or more of heavy fog are shaded in dark blue, prominently seen in some parts of northern Canada and the western coast of the United States. Regions with 60 days of heavy fog are shaded in purple, visible in some areas of northern Alaska and northeastern Canada, including regions of Victoria Islands, Parry Islands, and Naujaat. Areas experiencing 40 days of heavy fog are shaded in pink, found in parts of extreme eastern Canada, including Ellesmere, the Canadian Arctic Archipelago, Nunavut, and some coastal regions of the northern United States. Regions with 20 days of heavy fog are shaded in orange, noticeable in parts of the western and northeastern United States, and most of the eastern coast, as well as in northern Canada. Areas with 10 days of heavy fog are shaded in yellow, observed in many parts of the United States and Canada including South Dakota, North Dakota, Iowa, Illinois, Kentucky, Tennessee, Dallas, Montana, New York, Calgary, Newfoundland and Labrador, Manitoba, Yellowknife, Northern Territories, Yukon, Fairbanks, Alaska, Nome, Whitehorse, Juneau, New Mexico.

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Days with Heavy Fog

Oil Refineries

80 and over

60–79

40–59

20–39

10–19

Under 10

BP Amoco Cherry Point Refinery

BP Texas City Refinery

BP Toledo Refinery

BP West Coast Products Refinery

BP Whiting Refinery

Chalmette Refining LLC Refinery

Chevron El Segundo Refinery

Citgo Corpus Christi Refinery

Citgo Petroleum Corp Lake Charles Refinery

Coffeyville Resources Refinery

ConocoPhillips Alliance (Belle Chasse) Oil Refinery LA USA

ConocoPhillips Borger Refinery

ConocoPhillips Linden Refinery

ConocoPhillips Ponca City Refinery

ConocoPhillips Sweeny Refinery

ConocoPhillips Westlake Refinery

ConocoPhillips Wilmington Refinery

ConocoPhillips Wood River Refinery

Crown Central Petroleum Corp Refinery

Deer Park Refining LTD Ptnrshp Refinery

ExxonMobil Baytown Refinery USA

ExxonMobil Beaumont Refinery

ExxonMobil Joliet Refinery

ExxonMobil Torrance Refinery

Flint Hills Resources LP Refinery

Flint Hills Resources LP Saint Paul Refinery

Flint Hills Resources North Pole Refinery

Frontier Refining and Marketing Inc El Dorado Refinery

Imperial Oil Nanticoke Refinery

Imperial Oil Sarnia Refinery

Imperial Oil Strathcona Refinery

Irving Oil Limited Refinery

Lyondell Citgo Refining Houston Refinery

Marathon Ashland Petroleum LLC Catlettsburg Refinery

Marathon Ashland Petroleum LLC Garyville Refinery

Marathon Ashland Petroleum LLC Robinson Refinery

Motiva Enterprises LLC Convent Refinery

Motiva Enterprises LLC Norco Refinery

Motiva Enterprises LLC Port Arthur Refinery

Murphy Oil U.S.A. Inc Meraux Refinery

North Atlantic Refining Come by Chance Refinery

PBF Paulsboro Refinery NJ USA

PDV Midwest Refining LLC Lemont Refinery

Petro Canada Edmonton Refinery

Petro Canada Montreal Refinery

Premcor Refining Group Inc Lima Refinery

Premcor Refining Group Inc Memphis Refinery

Premcor Refining Group Inc Port Arthur Refinery

Premcore Refining Group Inc Delaware Refinery

Shell Anacortes Refinery

Shell Montreal East Refinery

Shell Oil Martinez Refinery

Shell Scotford Refinery

Sunoco Philadelphia Refinery

Sunoco Toledo Refinery

Tesoro Golden Eagle Martinez Refinery

Total Petrochemicals Inc Port Arthur Refinery

Ultramar(Valero) Jean-Gaulin Refinery

Valero Energy Corp Sunray Refinery

Valero Refining Co Corpus Christi West Refinery

Valero Refining Co Texas City Refinery

Valero Refining Corpus Christi East Plant

Valero Refining Port Arthur Refinery

Valero Saint Charles Oil Refinery LA USA

Valero Wilmington Refinery

Western Refining Co El Paso Refinery

Arizona
2.54%96.8%
Utah
1.95%15.8%45.3%
Yukon
3.45%13.9%65.1%
Northwest Territories
3.09%1.14%3.45%47.1%
District of Columbia
100%
Florida
8.74%57.3%9.83%7.67%
Idaho
9.77%63.1%27.1%
New Hampshire
28.4%64.3%7.25%
Rhode Island
3.92%
Vermont
1.65%12.1%42.6%43.7%
Wyoming
2.07%11.7%45.2%
Nunavut
1.04%4.62%1.22%8.60%
Montana
1.56%17.8%43.0%4.26%
Maine
3.20%27.6%26.2%34.9%
North Dakota
14.3%63.3%22.4%
Nova Scotia
40.0%23.3%11.3%
Virginia
1.87%19.6%15.2%57.7%
Prince Edward Island
98.5%
Saskatchewan
21.2%57.2%2.16%
Mississippi
47.6%47.1%5.25%
West Virginia
22.5%34.5%28.5%7.08%2.75%
Nebraska
96.2%2.94%
Missouri
1.28%85.3%13.4%
North Carolina
5.96%9.63%5.85%77.5%
Oregon
15.6%12.0%7.32%33.9%13.8%
Alabama
49.9%33.2%16.7%
New Mexico
4.55%9.09%66.0%
Wisconsin
13.3%86.2%
British Columbia
1.13%3.58%2.65%43.4%
South Carolina
2.79%2.88%93.3%
Michigan
2.85%57.7%12.0%
Connecticut
99.9%
Colorado
26.0%31.5%18.2%
Nevada
23.7%75.4%
Massachusetts
1.97%34.1%56.1%
Georgia
2.98%18.3%1.23%1.85%
New York
18.3%2.90%24.6%
Maryland
1.39%5.84%3.51%88.4%
Manitoba
7.19%44.3%
Arkansas
13.3%86.7%
South Dakota
99.1%
Iowa
29.7%70.3%
Alaska
6.62%7.64%17.8%57.5%1
Washington
20.4%5.93%1.84%17.3%5.92%11
Kentucky
2.26%32.1%60.8%2.77%1
Delaware
99.2%1
Texas
16.5%58.3%13.3%1111111111111111111
Louisiana
35.0%4.64%13.3%111111111
New Brunswick
5.70%12.5%20.7%57.3%1
Kansas
30.5%69.5%11
Newfoundland and Labrador
1.73%3.63%6.73%4.58%35.7%1
New Jersey
99.7%11
Alberta
74.4%24.2%111
Pennsylvania
2.54%1.92%2.00%14.5%1
Québec
5.65%14.9%18.6%28.5%111
Oklahoma
10.5%89.5%1
Tennessee
1.87%4.65%8.06%27.0%56.0%2.41%1
Ontario
3.62%1.52%32.9%7.70%11
California
6.15%4.08%11.9%8.83%18.7%1111111
Ohio
2.15%35.4%56.5%111
Indiana
4.86%88.4%1
Minnesota
8.70%33.6%57.6%1
Illinois
12.2%77.2%10.6%1111
0.16.0