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 67% 34% 10% 58% 28% 8% 123 46 12
Alabama Baldwin 49% 22% 8% 41% 18% 6% 75 28 9
Alabama Mobile 45% 22% 7% 38% 18% 6% 67 28 8
Connecticut 27% 9% 2% 22% 8% 1% 35 11 2
Connecticut Fairfield 22% 8% 2% 17% 6% 1% 27 9 2
Connecticut Middlesex 19% 9% 2% 16% 7% 1% 24 10 2
Connecticut New Haven 25% 9% 2% 20% 8% 1% 32 11 2
Connecticut New London 22% 9% 2% 17% 7% 1% 27 10 2
Delaware 28% 8% 1% 23% 6% 1% 36 9 1
Delaware Kent 19% 4% <1% 15% 3% <1% 23 4 0
Delaware New Castle 15% 1% <1% 12% 1% <1% 18 1 0
Delaware Sussex 25% 8% 1% 20% 6% 1% 32 9 1
Florida 92% 65% 35% 86% 56% 29% 274 115 48
Florida Bay 41% 21% 6% 34% 17% 5% 58 26 7
Florida Brevard 51% 21% 7% 42% 17% 6% 78 26 8
Florida Broward 50% 28% 13% 42% 23% 11% 77 36 16
Florida Charlotte 45% 21% 13% 38% 17% 10% 67 26 15
Florida Citrus 41% 21% 4% 34% 17% 3% 59 26 4
Florida Collier 50% 26% 16% 42% 21% 13% 77 34 19
Florida Dixie 42% 16% 2% 35% 13% 1% 61 19 2
Florida Duval 45% 18% 4% 38% 14% 3% 67 22 5
Florida Escambia 46% 22% 9% 39% 17% 7% 69 27 10
Florida Flagler 41% 18% 3% 34% 14% 2% 59 22 3
Florida Franklin 42% 17% 4% 35% 14% 3% 60 21 4
Florida Gulf 41% 19% 4% 34% 15% 3% 59 23 4
Florida Hernando 41% 21% 5% 34% 17% 4% 58 26 6
Florida Hillsborough 43% 22% 9% 36% 17% 7% 63 27 10
Florida Indian River 44% 21% 8% 37% 17% 6% 65 26 9
Florida Jefferson 40% 12% 1% 33% 9% 1% 56 14 1
Florida Lee 47% 22% 14% 40% 18% 11% 71 28 17
Florida Levy 43% 18% 4% 36% 14% 3% 62 22 4
Florida Manatee 44% 22% 9% 37% 18% 8% 65 28 11
Florida Martin 45% 22% 9% 38% 17% 7% 67 27 10
Florida Miami-Dade 51% 28% 17% 43% 23% 14% 79 37 21
Florida Monroe 61% 36% 21% 52% 30% 17% 103 50 26
Florida Nassau 46% 17% 4% 39% 13% 3% 69 20 5
Florida Okaloosa 43% 19% 7% 36% 16% 6% 62 24 8
Florida Palm Beach 50% 26% 11% 42% 21% 9% 77 34 13
Florida Pasco 43% 21% 6% 36% 17% 5% 63 26 7
Florida Pinellas 44% 21% 9% 36% 17% 7% 64 26 10
Florida Santa Rosa 42% 20% 7% 35% 16% 6% 61 25 8
Florida Sarasota 43% 21% 10% 36% 17% 8% 63 26 12
Florida St. Johns 46% 19% 4% 38% 15% 3% 68 23 5
Florida St. Lucie 43% 19% 7% 36% 15% 6% 63 23 8
Florida Taylor 43% 13% 1% 36% 11% 1% 62 16 1
Florida Volusia 46% 21% 3% 39% 17% 2% 69 26 3
Florida Wakulla 39% 15% 2% 32% 12% 1% 54 18 2
Florida Walton 42% 21% 7% 35% 17% 6% 60 26 8
Georgia 72% 37% 8% 63% 30% 6% 140 51 9
Georgia Bryan 46% 17% 3% 39% 14% 2% 69 21 3
Georgia Camden 48% 15% 4% 40% 12% 3% 72 18 5
Georgia Chatham 48% 18% 4% 40% 14% 3% 72 22 4
Georgia Glynn 44% 13% 4% 36% 10% 3% 64 15 5
Georgia Liberty 48% 18% 4% 40% 14% 3% 72 22 4
Georgia McIntosh 46% 17% 4% 39% 14% 3% 69 21 4
Louisiana 74% 46% 18% 66% 38% 14% 151 68 22
Louisiana Cameron 38% 19% 6% 31% 15% 5% 53 23 7
Louisiana Iberia 41% 20% 6% 34% 16% 5% 59 25 7
Louisiana Jefferson 45% 24% 7% 38% 19% 6% 67 30 8
Louisiana Lafourche 47% 26% 7% 40% 21% 6% 71 33 8
Louisiana Orleans 39% 19% 5% 32% 15% 4% 54 23 6
Louisiana Plaquemines 51% 27% 9% 43% 22% 7% 80 35 10
Louisiana St. Bernard 49% 26% 9% 41% 21% 8% 74 33 11
Louisiana St. Mary 42% 22% 5% 35% 17% 4% 61 27 6
Louisiana St. Tammany 41% 19% 5% 34% 16% 4% 58 24 6
Louisiana Terrebonne 51% 26% 8% 43% 21% 6% 79 34 9
Louisiana Vermilion 37% 19% 6% 31% 16% 5% 52 24 7
Maine 26% 9% 2% 21% 7% 1% 34 10 2
Maine Cumberland 15% 3% <1% 12% 2% <1% 18 3 0
Maine Hancock 13% 5% 1% 11% 4% 1% 16 6 1
Maine Knox 17% 5% 1% 13% 4% 1% 20 6 1
Maine Lincoln 13% 3% <1% 11% 2% <1% 16 3 0
Maine Sagadahoc 14% 3% <1% 11% 2% <1% 17 3 0
Maine Waldo 13% 3% <1% 10% 2% <1% 15 3 0
Maine Washington 15% 5% 1% 12% 4% 1% 18 6 1
Maine York 18% 4% 1% 14% 3% 1% 22 5 1
Maryland 37% 13% 1% 31% 11% 1% 52 16 1
Maryland Anne Arundel 15% 1% <1% 12% 1% <1% 18 1 0
Maryland Baltimore 13% 1% <1% 10% 1% <1% 15 1 0
Maryland Baltimore City 10% 1% <1% 8% 1% <1% 12 1 0
Maryland Calvert 17% 2% <1% 14% 1% <1% 21 2 0
Maryland Cecil 15% 1% <1% 12% 1% <1% 18 1 0
Maryland Dorchester 21% 4% <1% 17% 3% <1% 26 5 0
Maryland Harford 13% 0% <1% 10% 0% <1% 15 0 0
Maryland Kent 15% 0% <1% 12% 0% <1% 18 0 0
Maryland Queen Anne's 16% 1% <1% 13% 1% <1% 19 1 0
Maryland Somerset 26% 8% <1% 21% 6% <1% 33 9 0
Maryland St. Mary's 22% 3% <1% 17% 2% <1% 27 3 0
Maryland Talbot 17% 1% <1% 13% 1% <1% 20 1 0
Maryland Wicomico 22% 5% <1% 18% 4% <1% 28 6 0
Maryland Worcester 29% 11% 1% 24% 9% 1% 38 13 1
Massachusetts 40% 18% 4% 33% 14% 3% 56 22 4
Massachusetts Barnstable 21% 11% 2% 17% 9% 1% 26 13 2
Massachusetts Dukes 24% 9% 2% 20% 8% 1% 31 11 2
Massachusetts Essex 18% 6% 1% 14% 5% 1% 22 7 1
Massachusetts Nantucket 24% 12% 2% 19% 9% 1% 30 14 2
Massachusetts Norfolk 19% 6% 1% 15% 5% 1% 23 7 1
Massachusetts Plymouth 20% 9% 2% 16% 7% 1% 25 10 2
Massachusetts Suffolk 18% 6% 1% 14% 5% 1% 22 7 1
Mississippi 62% 35% 9% 53% 28% 8% 106 47 11
Mississippi Hancock 39% 18% 5% 32% 14% 4% 54 22 6
Mississippi Harrison 41% 21% 5% 34% 17% 4% 59 26 6
Mississippi Jackson 39% 19% 7% 32% 16% 6% 55 24 8
New Hampshire 22% 7% 2% 18% 6% 1% 28 8 2
New Hampshire Rockingham 18% 4% 1% 14% 3% 1% 22 5 1
New Jersey 28% 9% 1% 23% 7% 1% 36 10 1
New Jersey Atlantic 22% 9% 1% 17% 7% 1% 27 10 1
New Jersey Burlington 20% 7% <1% 16% 6% <1% 25 8 0
New Jersey Cape May 22% 9% 1% 18% 7% 1% 28 10 1
New Jersey Essex 17% 4% <1% 13% 3% <1% 20 4 0
New Jersey Hudson 17% 4% <1% 13% 3% <1% 20 4 0
New Jersey Middlesex 17% 4% <1% 14% 3% <1% 21 5 0
New Jersey Monmouth 20% 8% 1% 16% 6% 1% 25 9 1
New Jersey Ocean 22% 9% 1% 18% 7% 1% 28 10 1
New Jersey Salem 15% 2% <1% 12% 1% <1% 18 2 0
New Jersey Union 17% 4% <1% 13% 3% <1% 20 4 0
New York 32% 12% 3% 26% 9% 2% 43 14 3
New York Bronx 19% 6% 1% 15% 5% 1% 23 7 1
New York Kings 17% 5% <1% 14% 4% <1% 21 6 0
New York Nassau 19% 7% 2% 16% 6% 1% 24 8 2
New York New York 21% 8% 1% 17% 6% 1% 26 9 1
New York Queens 19% 7% 1% 16% 6% 1% 24 8 1
New York Richmond 19% 6% <1% 15% 5% <1% 23 7 0
New York Suffolk 26% 10% 3% 21% 8% 2% 33 12 3
New York Westchester 19% 6% 1% 16% 5% 1% 24 7 1
North Carolina 76% 46% 9% 68% 38% 8% 159 68 11
North Carolina Beaufort 45% 18% 1% 37% 14% 1% 66 22 1
North Carolina Bertie 40% 13% 1% 33% 10% 1% 57 15 1
North Carolina Brunswick 49% 25% 5% 41% 20% 4% 74 32 6
North Carolina Camden 42% 17% 1% 35% 13% 1% 61 20 1
North Carolina Carteret 56% 34% 5% 48% 28% 4% 92 46 6
North Carolina Chowan 36% 14% 1% 29% 11% 1% 49 17 1
North Carolina Craven 50% 24% 1% 42% 20% 1% 76 31 1
North Carolina Currituck 43% 18% 2% 36% 14% 1% 63 22 2
North Carolina Dare 57% 33% 5% 49% 27% 4% 94 45 6
North Carolina Gates 31% 10% <1% 25% 8% <1% 41 12 0
North Carolina Hertford 34% 9% <1% 28% 8% <1% 46 11 0
North Carolina Hyde 58% 33% 4% 50% 27% 3% 97 45 5
North Carolina New Hanover 47% 25% 5% 40% 20% 4% 71 32 6
North Carolina Onslow 49% 27% 4% 41% 22% 3% 74 35 5
North Carolina Pamlico 48% 24% 2% 40% 20% 1% 73 31 2
North Carolina Pasquotank 39% 16% 1% 32% 13% 1% 55 19 1
North Carolina Pender 50% 27% 5% 42% 22% 4% 76 35 6
North Carolina Perquimans 37% 15% 1% 31% 12% 1% 52 18 1
North Carolina Tyrrell 44% 21% 2% 36% 17% 1% 64 26 2
North Carolina Washington 41% 16% 1% 34% 13% 1% 58 19 1
Rhode Island 25% 9% 2% 20% 8% 1% 32 11 2
Rhode Island Bristol 17% 7% 2% 14% 6% 1% 21 8 2
Rhode Island Kent 19% 7% 1% 15% 6% 1% 23 8 1
Rhode Island Newport 20% 9% 2% 16% 7% 1% 25 10 2
Rhode Island Providence 20% 8% 1% 16% 6% 1% 25 9 1
Rhode Island Washington/South 22% 8% 2% 18% 6% 1% 28 9 2
South Carolina 66% 35% 10% 57% 29% 8% 118 48 12
South Carolina Beaufort 45% 18% 4% 38% 14% 3% 67 22 5
South Carolina Charleston 51% 26% 6% 43% 21% 5% 80 33 7
South Carolina Colleton 47% 21% 5% 40% 17% 4% 71 26 6
South Carolina Georgetown 44% 22% 5% 36% 17% 4% 64 27 6
South Carolina Horry 46% 25% 5% 39% 20% 4% 69 32 6
South Carolina Jasper 46% 17% 4% 39% 14% 3% 69 21 4
Texas 70% 44% 19% 61% 36% 16% 133 64 24
Texas Aransas 24% 13% 6% 19% 11% 5% 30 16 7
Texas Brazoria 37% 20% 6% 30% 16% 5% 51 25 7
Texas Calhoun 31% 17% 6% 25% 13% 5% 41 20 7
Texas Cameron 30% 17% 6% 24% 13% 5% 39 20 7
Texas Chambers 37% 19% 6% 30% 16% 5% 51 24 7
Texas Galveston 41% 23% 7% 34% 19% 6% 58 29 8
Texas Harris 36% 19% 5% 29% 16% 4% 49 24 6
Texas Jefferson 36% 20% 5% 29% 16% 4% 49 25 6
Texas Kenedy 30% 17% 9% 24% 14% 7% 39 21 10
Texas Kleberg 28% 16% 7% 23% 13% 6% 36 19 8
Texas Matagorda 39% 22% 9% 32% 17% 8% 54 27 11
Texas Nueces 30% 17% 8% 24% 14% 6% 39 21 9
Texas Refugio 26% 12% 5% 21% 9% 4% 34 14 6
Texas San Patricio 26% 14% 6% 21% 11% 5% 34 17 7
Texas Willacy 27% 16% 7% 22% 13% 6% 35 19 8
Virginia 54% 24% 2% 46% 20% 1% 86 31 2
Virginia Accomack 33% 11% <1% 27% 9% <1% 44 13 0
Virginia Gloucester 26% 6% <1% 21% 5% <1% 34 7 0
Virginia Hampton 33% 10% <1% 27% 8% <1% 44 12 0
Virginia Lancaster 24% 4% <1% 20% 3% <1% 31 5 0
Virginia Mathews 26% 6% <1% 21% 5% <1% 34 7 0
Virginia Middlesex 26% 4% <1% 21% 3% <1% 33 5 0
Virginia Newport News 27% 7% <1% 22% 6% <1% 35 8 0
Virginia Norfolk 32% 10% <1% 26% 8% <1% 42 12 0
Virginia Northampton 33% 11% <1% 27% 9% <1% 44 13 0
Virginia Northumberland 24% 4% <1% 19% 3% <1% 30 5 0
Virginia Poquoson 29% 8% <1% 24% 6% <1% 38 9 0
Virginia Portsmouth 29% 9% <1% 24% 7% <1% 38 10 0
Virginia Suffolk 31% 9% <1% 25% 8% <1% 41 11 0
Virginia Virginia Beach 36% 15% <1% 30% 12% <1% 50 18 0
Virginia York 30% 8% <1% 25% 6% <1% 40 9 0
Canada 59% 35% 2% 51% 29% 1% 100 48 2
New Brunswick 40% 9% 1% 33% 8% 1% 57 11 1
Newfoundland and Labrador 32% 19% 1% 26% 16% 1% 43 24 1
Nova Scotia 50% 33% 1% 42% 27% 1% 77 44 1
Prince Edward Island 12% 8% <1% 9% 6% <1% 14 9 0
Mexico 84% 53% 23% 76% 44% 19% 204 83 29
Campeche 55% 26% 6% 47% 21% 5% 89 33 7
Quintana Roo 72% 40% 19% 63% 33% 15% 139 57 23
Tabasco 30% 7% <1% 25% 6% <1% 40 8 0
Tamaulipas 55% 32% 12% 47% 26% 9% 89 43 14
Veracruz 53% 25% 4% 44% 20% 3% 83 32 4
Yucatan 62% 32% 15% 53% 26% 12% 107 43 18
Anguilla 42% 22% 10% 35% 18% 8% 61 28 12
Antigua and Barbuda 34% 19% 9% 28% 15% 7% 46 23 10
Aruba 13% 6% <1% 10% 5% <1% 15 7 0
Bahamas, The 88% 62% 36% 81% 53% 30% 237 106 50
Barbados 35% 8% 2% 28% 6% 1% 47 9 2
Belize 50% 24% 8% 42% 19% 6% 76 30 9
Bermuda 47% 32% 14% 40% 26% 11% 71 42 17
Bonaire 9% 4% <1% 8% 3% <1% 11 5 0
Cabo Verde 20% 4% <1% 16% 3% <1% 25 4 0
Cayman Islands 47% 28% 9% 40% 23% 8% 71 37 11
Costa Rica 7% 3% 1% 6% 2% 1% 8 3 1
Cuba 84% 60% 31% 76% 51% 25% 204 102 41
Curacao 11% 5% <1% 9% 4% <1% 13 6 0
Dominica 40% 17% 9% 33% 14% 7% 57 21 10
Dominican Republic 67% 42% 21% 58% 35% 17% 123 61 26
Grenada 34% 9% 1% 28% 7% 1% 46 10 1
Guadeloupe 41% 22% 9% 34% 18% 7% 59 28 10
Guatemala 46% 19% 4% 38% 15% 3% 68 23 4
Haiti 52% 32% 12% 44% 26% 9% 82 42 14
Honduras 73% 34% 13% 64% 28% 11% 146 46 16
Jamaica 55% 28% 10% 46% 23% 8% 88 36 12
Martinique 41% 14% 5% 34% 11% 4% 59 17 6
Montserrat 32% 18% 7% 26% 14% 6% 43 22 8
Nicaragua 43% 20% 9% 36% 16% 8% 62 25 11
Panama 2% 1% <1% 1% 1% <1% 2 1 0
Puerto Rico 48% 29% 12% 40% 24% 9% 73 38 14
Saba 30% 19% 8% 24% 15% 6% 39 23 9
Saint Kitts and Nevis 41% 25% 11% 34% 20% 9% 59 32 13
Saint Lucia 48% 13% 4% 40% 10% 3% 73 15 5
Saint Martin 32% 19% 9% 26% 15% 8% 43 23 11
Saint Vincent and the Grenadines 49% 11% 2% 41% 9% 1% 74 13 2
Sint Eustatius 30% 19% 9% 25% 15% 8% 40 23 11
Sint Maarten 32% 19% 9% 26% 15% 8% 43 23 11
Trinidad and Tobago 9% 3% <1% 8% 2% <1% 11 3 0
Turks and Caicos 48% 25% 13% 40% 20% 11% 73 32 16
UK Virgin Islands 46% 27% 13% 39% 22% 10% 69 35 15
US Virgin Islands 40% 24% 10% 33% 19% 8% 57 30 12