Resources Created by the CSU Tropical Group

Forecasting and Research Resources

CSU Tropical Cyclone Impact Probabilities

Since 2021, we have calculated the impacts of tropical cyclones for each state and county/parish along the Gulf and East Coasts, tropical cyclone-prone provinces of Canada, Atlantic-facing states of coastal Mexico, islands in the Caribbean and countries in Central America. We have used NOAA’s Historical Hurricane Tracks website and selected all named storms, hurricanes and major hurricanes that have tracked within 50 miles of each landmass from 1880-2020. This approach allows for tropical cyclones that may have tracked through an immediately adjacent region to be counted for all regions that were in close proximity to the location of the storm. We then fit the observed frequency of storms within 50 miles of each landmass using a Poisson distribution to calculate the climatological odds of one or more events within 50 miles. Net landfall probability is shown to be linked to the overall Atlantic basin Accumulated Cyclone Energy (ACE). A measure of a named storm’s potential for wind and storm surge destruction defined as the sum of the square of a named storm’s maximum wind speed (in 104 knots2) for each 6-hour period of its existence. Long-term statistics show that, on average, the more active the overall Atlantic basin hurricane season is, the greater the probability of U.S. hurricane landfall. Use the drop-down to obtain the climatological odds of storms tracking within 50 miles of each state along the Gulf and East Coasts along with the odds for the current season based on the latest forecast. All of the calculations are also available in a downloadable spreadsheet.

Tropical Cyclone Impact Probabilities (defined as one or more storms within 50 miles of location)

State County 2025 Forecast Probability of Named Storm impact 2025 Forecast Probability of Hurricane impact 2025 Forecast Probability of Major Hurricane impact Average Probability of Named Storm impact Average Probability of Hurricane impact Average Probability of Major Hurricane impact # Named Storms 1880-2020 # Hurricanes 1880-2020 # Major Hurricanes 1880-2020
Alabama 63% 31% 9% 58% 28% 8% 123 46 12
Alabama Baldwin 46% 20% 7% 41% 18% 6% 75 28 9
Alabama Mobile 42% 20% 6% 38% 18% 6% 67 28 8
Connecticut 25% 9% 2% 22% 8% 1% 35 11 2
Connecticut Fairfield 20% 7% 2% 17% 6% 1% 27 9 2
Connecticut Middlesex 18% 8% 2% 16% 7% 1% 24 10 2
Connecticut New Haven 23% 9% 2% 20% 8% 1% 32 11 2
Connecticut New London 20% 8% 2% 17% 7% 1% 27 10 2
Delaware 25% 7% 1% 23% 6% 1% 36 9 1
Delaware Kent 17% 3% <1% 15% 3% <1% 23 4 0
Delaware New Castle 14% 1% <1% 12% 1% <1% 18 1 0
Delaware Sussex 23% 7% 1% 20% 6% 1% 32 9 1
Florida 89% 61% 32% 86% 56% 29% 274 115 48
Florida Bay 38% 19% 6% 34% 17% 5% 58 26 7
Florida Brevard 47% 19% 6% 42% 17% 6% 78 26 8
Florida Broward 47% 25% 12% 42% 23% 11% 77 36 16
Florida Charlotte 42% 19% 12% 38% 17% 10% 67 26 15
Florida Citrus 38% 19% 3% 34% 17% 3% 59 26 4
Florida Collier 47% 24% 14% 42% 21% 13% 77 34 19
Florida Dixie 39% 14% 2% 35% 13% 1% 61 19 2
Florida Duval 42% 16% 4% 38% 14% 3% 67 22 5
Florida Escambia 43% 20% 8% 39% 17% 7% 69 27 10
Florida Flagler 38% 16% 2% 34% 14% 2% 59 22 3
Florida Franklin 39% 16% 3% 35% 14% 3% 60 21 4
Florida Gulf 38% 17% 3% 34% 15% 3% 59 23 4
Florida Hernando 38% 19% 5% 34% 17% 4% 58 26 6
Florida Hillsborough 40% 20% 8% 36% 17% 7% 63 27 10
Florida Indian River 41% 19% 7% 37% 17% 6% 65 26 9
Florida Jefferson 37% 11% 1% 33% 9% 1% 56 14 1
Florida Lee 44% 20% 13% 40% 18% 11% 71 28 17
Florida Levy 40% 16% 3% 36% 14% 3% 62 22 4
Florida Manatee 41% 20% 9% 37% 18% 8% 65 28 11
Florida Martin 42% 20% 8% 38% 17% 7% 67 27 10
Florida Miami-Dade 48% 26% 16% 43% 23% 14% 79 37 21
Florida Monroe 57% 34% 19% 52% 30% 17% 103 50 26
Florida Nassau 43% 15% 4% 39% 13% 3% 69 20 5
Florida Okaloosa 40% 18% 6% 36% 16% 6% 62 24 8
Florida Palm Beach 47% 24% 10% 42% 21% 9% 77 34 13
Florida Pasco 40% 19% 6% 36% 17% 5% 63 26 7
Florida Pinellas 41% 19% 8% 36% 17% 7% 64 26 10
Florida Santa Rosa 39% 18% 6% 35% 16% 6% 61 25 8
Florida Sarasota 40% 19% 9% 36% 17% 8% 63 26 12
Florida St. Johns 43% 17% 4% 38% 15% 3% 68 23 5
Florida St. Lucie 40% 17% 6% 36% 15% 6% 63 23 8
Florida Taylor 40% 12% 1% 36% 11% 1% 62 16 1
Florida Volusia 43% 19% 2% 39% 17% 2% 69 26 3
Florida Wakulla 36% 14% 2% 32% 12% 1% 54 18 2
Florida Walton 39% 19% 6% 35% 17% 6% 60 26 8
Georgia 68% 34% 7% 63% 30% 6% 140 51 9
Georgia Bryan 43% 16% 2% 39% 14% 2% 69 21 3
Georgia Camden 44% 14% 4% 40% 12% 3% 72 18 5
Georgia Chatham 44% 16% 3% 40% 14% 3% 72 22 4
Georgia Glynn 41% 12% 4% 36% 10% 3% 64 15 5
Georgia Liberty 44% 16% 3% 40% 14% 3% 72 22 4
Georgia McIntosh 43% 16% 3% 39% 14% 3% 69 21 4
Louisiana 71% 43% 16% 66% 38% 14% 151 68 22
Louisiana Cameron 35% 17% 6% 31% 15% 5% 53 23 7
Louisiana Iberia 38% 18% 6% 34% 16% 5% 59 25 7
Louisiana Jefferson 42% 22% 6% 38% 19% 6% 67 30 8
Louisiana Lafourche 44% 24% 6% 40% 21% 6% 71 33 8
Louisiana Orleans 36% 17% 5% 32% 15% 4% 54 23 6
Louisiana Plaquemines 48% 25% 8% 43% 22% 7% 80 35 10
Louisiana St. Bernard 45% 24% 9% 41% 21% 8% 74 33 11
Louisiana St. Mary 39% 20% 5% 35% 17% 4% 61 27 6
Louisiana St. Tammany 38% 18% 5% 34% 16% 4% 58 24 6
Louisiana Terrebonne 48% 24% 7% 43% 21% 6% 79 34 9
Louisiana Vermilion 35% 18% 6% 31% 16% 5% 52 24 7
Maine 24% 8% 2% 21% 7% 1% 34 10 2
Maine Cumberland 14% 2% <1% 12% 2% <1% 18 3 0
Maine Hancock 12% 5% 1% 11% 4% 1% 16 6 1
Maine Knox 15% 5% 1% 13% 4% 1% 20 6 1
Maine Lincoln 12% 2% <1% 11% 2% <1% 16 3 0
Maine Sagadahoc 13% 2% <1% 11% 2% <1% 17 3 0
Maine Waldo 12% 2% <1% 10% 2% <1% 15 3 0
Maine Washington 14% 5% 1% 12% 4% 1% 18 6 1
Maine York 16% 4% 1% 14% 3% 1% 22 5 1
Maryland 35% 12% 1% 31% 11% 1% 52 16 1
Maryland Anne Arundel 14% 1% <1% 12% 1% <1% 18 1 0
Maryland Baltimore 12% 1% <1% 10% 1% <1% 15 1 0
Maryland Baltimore City 9% 1% <1% 8% 1% <1% 12 1 0
Maryland Calvert 16% 2% <1% 14% 1% <1% 21 2 0
Maryland Cecil 14% 1% <1% 12% 1% <1% 18 1 0
Maryland Dorchester 19% 4% <1% 17% 3% <1% 26 5 0
Maryland Harford 12% 0% <1% 10% 0% <1% 15 0 0
Maryland Kent 14% 0% <1% 12% 0% <1% 18 0 0
Maryland Queen Anne's 14% 1% <1% 13% 1% <1% 19 1 0
Maryland Somerset 24% 7% <1% 21% 6% <1% 33 9 0
Maryland St. Mary's 20% 2% <1% 17% 2% <1% 27 3 0
Maryland Talbot 15% 1% <1% 13% 1% <1% 20 1 0
Maryland Wicomico 20% 5% <1% 18% 4% <1% 28 6 0
Maryland Worcester 27% 10% 1% 24% 9% 1% 38 13 1
Massachusetts 37% 16% 3% 33% 14% 3% 56 22 4
Massachusetts Barnstable 19% 10% 2% 17% 9% 1% 26 13 2
Massachusetts Dukes 22% 9% 2% 20% 8% 1% 31 11 2
Massachusetts Essex 16% 6% 1% 14% 5% 1% 22 7 1
Massachusetts Nantucket 22% 11% 2% 19% 9% 1% 30 14 2
Massachusetts Norfolk 17% 6% 1% 15% 5% 1% 23 7 1
Massachusetts Plymouth 18% 8% 2% 16% 7% 1% 25 10 2
Massachusetts Suffolk 16% 6% 1% 14% 5% 1% 22 7 1
Mississippi 58% 32% 9% 53% 28% 8% 106 47 11
Mississippi Hancock 36% 16% 5% 32% 14% 4% 54 22 6
Mississippi Harrison 38% 19% 5% 34% 17% 4% 59 26 6
Mississippi Jackson 36% 18% 6% 32% 16% 6% 55 24 8
New Hampshire 20% 6% 2% 18% 6% 1% 28 8 2
New Hampshire Rockingham 16% 4% 1% 14% 3% 1% 22 5 1
New Jersey 25% 8% 1% 23% 7% 1% 36 10 1
New Jersey Atlantic 20% 8% 1% 17% 7% 1% 27 10 1
New Jersey Burlington 18% 6% <1% 16% 6% <1% 25 8 0
New Jersey Cape May 20% 8% 1% 18% 7% 1% 28 10 1
New Jersey Essex 15% 3% <1% 13% 3% <1% 20 4 0
New Jersey Hudson 15% 3% <1% 13% 3% <1% 20 4 0
New Jersey Middlesex 16% 4% <1% 14% 3% <1% 21 5 0
New Jersey Monmouth 18% 7% 1% 16% 6% 1% 25 9 1
New Jersey Ocean 20% 8% 1% 18% 7% 1% 28 10 1
New Jersey Salem 14% 2% <1% 12% 1% <1% 18 2 0
New Jersey Union 15% 3% <1% 13% 3% <1% 20 4 0
New York 30% 11% 2% 26% 9% 2% 43 14 3
New York Bronx 17% 6% 1% 15% 5% 1% 23 7 1
New York Kings 16% 5% <1% 14% 4% <1% 21 6 0
New York Nassau 18% 6% 2% 16% 6% 1% 24 8 2
New York New York 19% 7% 1% 17% 6% 1% 26 9 1
New York Queens 18% 6% 1% 16% 6% 1% 24 8 1
New York Richmond 17% 6% <1% 15% 5% <1% 23 7 0
New York Suffolk 24% 9% 2% 21% 8% 2% 33 12 3
New York Westchester 18% 6% 1% 16% 5% 1% 24 7 1
North Carolina 73% 43% 9% 68% 38% 8% 159 68 11
North Carolina Beaufort 42% 16% 1% 37% 14% 1% 66 22 1
North Carolina Bertie 37% 12% 1% 33% 10% 1% 57 15 1
North Carolina Brunswick 45% 23% 5% 41% 20% 4% 74 32 6
North Carolina Camden 39% 15% 1% 35% 13% 1% 61 20 1
North Carolina Carteret 53% 31% 5% 48% 28% 4% 92 46 6
North Carolina Chowan 33% 13% 1% 29% 11% 1% 49 17 1
North Carolina Craven 46% 22% 1% 42% 20% 1% 76 31 1
North Carolina Currituck 40% 16% 2% 36% 14% 1% 63 22 2
North Carolina Dare 54% 31% 5% 49% 27% 4% 94 45 6
North Carolina Gates 28% 9% <1% 25% 8% <1% 41 12 0
North Carolina Hertford 31% 9% <1% 28% 8% <1% 46 11 0
North Carolina Hyde 55% 31% 4% 50% 27% 3% 97 45 5
North Carolina New Hanover 44% 23% 5% 40% 20% 4% 71 32 6
North Carolina Onslow 45% 25% 4% 41% 22% 3% 74 35 5
North Carolina Pamlico 45% 22% 2% 40% 20% 1% 73 31 2
North Carolina Pasquotank 36% 14% 1% 32% 13% 1% 55 19 1
North Carolina Pender 46% 25% 5% 42% 22% 4% 76 35 6
North Carolina Perquimans 35% 14% 1% 31% 12% 1% 52 18 1
North Carolina Tyrrell 41% 19% 2% 36% 17% 1% 64 26 2
North Carolina Washington 38% 14% 1% 34% 13% 1% 58 19 1
Rhode Island 23% 9% 2% 20% 8% 1% 32 11 2
Rhode Island Bristol 16% 6% 2% 14% 6% 1% 21 8 2
Rhode Island Kent 17% 6% 1% 15% 6% 1% 23 8 1
Rhode Island Newport 18% 8% 2% 16% 7% 1% 25 10 2
Rhode Island Providence 18% 7% 1% 16% 6% 1% 25 9 1
Rhode Island Washington/South 20% 7% 2% 18% 6% 1% 28 9 2
South Carolina 62% 32% 9% 57% 29% 8% 118 48 12
South Carolina Beaufort 42% 16% 4% 38% 14% 3% 67 22 5
South Carolina Charleston 48% 24% 6% 43% 21% 5% 80 33 7
South Carolina Colleton 44% 19% 5% 40% 17% 4% 71 26 6
South Carolina Georgetown 41% 20% 5% 36% 17% 4% 64 27 6
South Carolina Horry 43% 23% 5% 39% 20% 4% 69 32 6
South Carolina Jasper 43% 16% 3% 39% 14% 3% 69 21 4
Texas 66% 41% 18% 61% 36% 16% 133 64 24
Texas Aransas 22% 12% 6% 19% 11% 5% 30 16 7
Texas Brazoria 34% 18% 6% 30% 16% 5% 51 25 7
Texas Calhoun 28% 15% 6% 25% 13% 5% 41 20 7
Texas Cameron 27% 15% 6% 24% 13% 5% 39 20 7
Texas Chambers 34% 18% 6% 30% 16% 5% 51 24 7
Texas Galveston 38% 21% 6% 34% 19% 6% 58 29 8
Texas Harris 33% 18% 5% 29% 16% 4% 49 24 6
Texas Jefferson 33% 18% 5% 29% 16% 4% 49 25 6
Texas Kenedy 27% 16% 8% 24% 14% 7% 39 21 10
Texas Kleberg 25% 14% 6% 23% 13% 6% 36 19 8
Texas Matagorda 36% 20% 9% 32% 17% 8% 54 27 11
Texas Nueces 27% 16% 7% 24% 14% 6% 39 21 9
Texas Refugio 24% 11% 5% 21% 9% 4% 34 14 6
Texas San Patricio 24% 13% 6% 21% 11% 5% 34 17 7
Texas Willacy 25% 14% 6% 22% 13% 6% 35 19 8
Virginia 50% 22% 2% 46% 20% 1% 86 31 2
Virginia Accomack 30% 10% <1% 27% 9% <1% 44 13 0
Virginia Gloucester 24% 6% <1% 21% 5% <1% 34 7 0
Virginia Hampton 30% 9% <1% 27% 8% <1% 44 12 0
Virginia Lancaster 22% 4% <1% 20% 3% <1% 31 5 0
Virginia Mathews 24% 6% <1% 21% 5% <1% 34 7 0
Virginia Middlesex 24% 4% <1% 21% 3% <1% 33 5 0
Virginia Newport News 25% 6% <1% 22% 6% <1% 35 8 0
Virginia Norfolk 29% 9% <1% 26% 8% <1% 42 12 0
Virginia Northampton 30% 10% <1% 27% 9% <1% 44 13 0
Virginia Northumberland 22% 4% <1% 19% 3% <1% 30 5 0
Virginia Poquoson 27% 7% <1% 24% 6% <1% 38 9 0
Virginia Portsmouth 27% 8% <1% 24% 7% <1% 38 10 0
Virginia Suffolk 28% 9% <1% 25% 8% <1% 41 11 0
Virginia Virginia Beach 34% 14% <1% 30% 12% <1% 50 18 0
Virginia York 28% 7% <1% 25% 6% <1% 40 9 0
Canada 56% 32% 2% 51% 29% 1% 100 48 2
New Brunswick 37% 9% 1% 33% 8% 1% 57 11 1
Newfoundland and Labrador 30% 18% 1% 26% 16% 1% 43 24 1
Nova Scotia 47% 30% 1% 42% 27% 1% 77 44 1
Prince Edward Island 11% 7% <1% 9% 6% <1% 14 9 0
Mexico 81% 49% 21% 76% 44% 19% 204 83 29
Campeche 52% 24% 6% 47% 21% 5% 89 33 7
Quintana Roo 68% 37% 17% 63% 33% 15% 139 57 23
Tabasco 28% 6% <1% 25% 6% <1% 40 8 0
Tamaulipas 52% 30% 11% 47% 26% 9% 89 43 14
Veracruz 49% 23% 3% 44% 20% 3% 83 32 4
Yucatan 58% 30% 14% 53% 26% 12% 107 43 18
Anguilla 39% 20% 9% 35% 18% 8% 61 28 12
Antigua and Barbuda 31% 17% 8% 28% 15% 7% 46 23 10
Aruba 12% 6% <1% 10% 5% <1% 15 7 0
Bahamas, The 86% 58% 34% 81% 53% 30% 237 106 50
Barbados 32% 7% 2% 28% 6% 1% 47 9 2
Belize 46% 22% 7% 42% 19% 6% 76 30 9
Bermuda 44% 29% 13% 40% 26% 11% 71 42 17
Bonaire 9% 4% <1% 8% 3% <1% 11 5 0
Cabo Verde 18% 3% <1% 16% 3% <1% 25 4 0
Cayman Islands 44% 26% 9% 40% 23% 8% 71 37 11
Costa Rica 6% 2% 1% 6% 2% 1% 8 3 1
Cuba 81% 57% 28% 76% 51% 25% 204 102 41
Curacao 10% 5% <1% 9% 4% <1% 13 6 0
Dominica 37% 16% 8% 33% 14% 7% 57 21 10
Dominican Republic 63% 39% 19% 58% 35% 17% 123 61 26
Grenada 31% 8% 1% 28% 7% 1% 46 10 1
Guadeloupe 38% 20% 8% 34% 18% 7% 59 28 10
Guatemala 43% 17% 3% 38% 15% 3% 68 23 4
Haiti 49% 29% 11% 44% 26% 9% 82 42 14
Honduras 70% 31% 12% 64% 28% 11% 146 46 16
Jamaica 51% 25% 9% 46% 23% 8% 88 36 12
Martinique 38% 13% 5% 34% 11% 4% 59 17 6
Montserrat 30% 16% 6% 26% 14% 6% 43 22 8
Nicaragua 40% 18% 9% 36% 16% 8% 62 25 11
Panama 2% 1% <1% 1% 1% <1% 2 1 0
Puerto Rico 45% 27% 11% 40% 24% 9% 73 38 14
Saba 27% 17% 7% 24% 15% 6% 39 23 9
Saint Kitts and Nevis 38% 23% 10% 34% 20% 9% 59 32 13
Saint Lucia 45% 12% 4% 40% 10% 3% 73 15 5
Saint Martin 30% 17% 9% 26% 15% 8% 43 23 11
Saint Vincent and the Grenadines 45% 10% 2% 41% 9% 1% 74 13 2
Sint Eustatius 28% 17% 9% 25% 15% 8% 40 23 11
Sint Maarten 30% 17% 9% 26% 15% 8% 43 23 11
Trinidad and Tobago 9% 2% <1% 8% 2% <1% 11 3 0
Turks and Caicos 45% 23% 12% 40% 20% 11% 73 32 16
UK Virgin Islands 43% 25% 12% 39% 22% 10% 69 35 15
US Virgin Islands 37% 22% 9% 33% 19% 8% 57 30 12