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 2024 Forecast Probability of Named Storm impact 2024 Forecast Probability of Hurricane impact 2024 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 72% 38% 12% 58% 28% 8% 123 46 12
Alabama Baldwin 54% 25% 9% 41% 18% 6% 75 28 9
Alabama Mobile 50% 25% 8% 38% 18% 6% 67 28 8
Connecticut 31% 11% 2% 22% 8% 1% 35 11 2
Connecticut Fairfield 25% 9% 2% 17% 6% 1% 27 9 2
Connecticut Middlesex 22% 10% 2% 16% 7% 1% 24 10 2
Connecticut New Haven 29% 11% 2% 20% 8% 1% 32 11 2
Connecticut New London 25% 10% 2% 17% 7% 1% 27 10 2
Delaware 31% 9% 1% 23% 6% 1% 36 9 1
Delaware Kent 21% 4% <1% 15% 3% <1% 23 4 0
Delaware New Castle 17% 1% <1% 12% 1% <1% 18 1 0
Delaware Sussex 29% 9% 1% 20% 6% 1% 32 9 1
Florida 94% 70% 40% 86% 56% 29% 274 115 48
Florida Bay 46% 24% 7% 34% 17% 5% 58 26 7
Florida Brevard 56% 24% 8% 42% 17% 6% 78 26 8
Florida Broward 55% 31% 15% 42% 23% 11% 77 36 16
Florida Charlotte 50% 24% 15% 38% 17% 10% 67 26 15
Florida Citrus 46% 24% 4% 34% 17% 3% 59 26 4
Florida Collier 55% 30% 18% 42% 21% 13% 77 34 19
Florida Dixie 47% 18% 2% 35% 13% 1% 61 19 2
Florida Duval 50% 21% 5% 38% 14% 3% 67 22 5
Florida Escambia 52% 25% 10% 39% 17% 7% 69 27 10
Florida Flagler 46% 21% 3% 34% 14% 2% 59 22 3
Florida Franklin 47% 20% 4% 35% 14% 3% 60 21 4
Florida Gulf 46% 21% 4% 34% 15% 3% 59 23 4
Florida Hernando 46% 24% 6% 34% 17% 4% 58 26 6
Florida Hillsborough 48% 25% 10% 36% 17% 7% 63 27 10
Florida Indian River 49% 24% 9% 37% 17% 6% 65 26 9
Florida Jefferson 44% 14% 1% 33% 9% 1% 56 14 1
Florida Lee 53% 25% 16% 40% 18% 11% 71 28 17
Florida Levy 48% 21% 4% 36% 14% 3% 62 22 4
Florida Manatee 49% 25% 11% 37% 18% 8% 65 28 11
Florida Martin 50% 25% 10% 38% 17% 7% 67 27 10
Florida Miami-Dade 56% 32% 20% 43% 23% 14% 79 37 21
Florida Monroe 66% 41% 24% 52% 30% 17% 103 50 26
Florida Nassau 52% 19% 5% 39% 13% 3% 69 20 5
Florida Okaloosa 48% 22% 8% 36% 16% 6% 62 24 8
Florida Palm Beach 55% 30% 13% 42% 21% 9% 77 34 13
Florida Pasco 48% 24% 7% 36% 17% 5% 63 26 7
Florida Pinellas 49% 24% 10% 36% 17% 7% 64 26 10
Florida Santa Rosa 47% 23% 8% 35% 16% 6% 61 25 8
Florida Sarasota 48% 24% 12% 36% 17% 8% 63 26 12
Florida St. Johns 51% 21% 5% 38% 15% 3% 68 23 5
Florida St. Lucie 48% 21% 8% 36% 15% 6% 63 23 8
Florida Taylor 48% 15% 1% 36% 11% 1% 62 16 1
Florida Volusia 52% 24% 3% 39% 17% 2% 69 26 3
Florida Wakulla 43% 17% 2% 32% 12% 1% 54 18 2
Florida Walton 47% 24% 8% 35% 17% 6% 60 26 8
Georgia 77% 41% 9% 63% 30% 6% 140 51 9
Georgia Bryan 52% 20% 3% 39% 14% 2% 69 21 3
Georgia Camden 53% 17% 5% 40% 12% 3% 72 18 5
Georgia Chatham 53% 21% 4% 40% 14% 3% 72 22 4
Georgia Glynn 49% 15% 5% 36% 10% 3% 64 15 5
Georgia Liberty 53% 21% 4% 40% 14% 3% 72 22 4
Georgia McIntosh 52% 20% 4% 39% 14% 3% 69 21 4
Louisiana 79% 51% 21% 66% 38% 14% 151 68 22
Louisiana Cameron 43% 21% 7% 31% 15% 5% 53 23 7
Louisiana Iberia 46% 23% 7% 34% 16% 5% 59 25 7
Louisiana Jefferson 50% 27% 8% 38% 19% 6% 67 30 8
Louisiana Lafourche 53% 29% 8% 40% 21% 6% 71 33 8
Louisiana Orleans 43% 21% 6% 32% 15% 4% 54 23 6
Louisiana Plaquemines 57% 31% 10% 43% 22% 7% 80 35 10
Louisiana St. Bernard 54% 29% 11% 41% 21% 8% 74 33 11
Louisiana St. Mary 47% 25% 6% 35% 17% 4% 61 27 6
Louisiana St. Tammany 46% 22% 6% 34% 16% 4% 58 24 6
Louisiana Terrebonne 56% 30% 9% 43% 21% 6% 79 34 9
Louisiana Vermilion 42% 22% 7% 31% 16% 5% 52 24 7
Maine 30% 10% 2% 21% 7% 1% 34 10 2
Maine Cumberland 17% 3% <1% 12% 2% <1% 18 3 0
Maine Hancock 15% 6% 1% 11% 4% 1% 16 6 1
Maine Knox 19% 6% 1% 13% 4% 1% 20 6 1
Maine Lincoln 15% 3% <1% 11% 2% <1% 16 3 0
Maine Sagadahoc 16% 3% <1% 11% 2% <1% 17 3 0
Maine Waldo 15% 3% <1% 10% 2% <1% 15 3 0
Maine Washington 17% 6% 1% 12% 4% 1% 18 6 1
Maine York 21% 5% 1% 14% 3% 1% 22 5 1
Maryland 42% 15% 1% 31% 11% 1% 52 16 1
Maryland Anne Arundel 17% 1% <1% 12% 1% <1% 18 1 0
Maryland Baltimore 15% 1% <1% 10% 1% <1% 15 1 0
Maryland Baltimore City 12% 1% <1% 8% 1% <1% 12 1 0
Maryland Calvert 20% 2% <1% 14% 1% <1% 21 2 0
Maryland Cecil 17% 1% <1% 12% 1% <1% 18 1 0
Maryland Dorchester 24% 5% <1% 17% 3% <1% 26 5 0
Maryland Harford 15% 0% <1% 10% 0% <1% 15 0 0
Maryland Kent 17% 0% <1% 12% 0% <1% 18 0 0
Maryland Queen Anne's 18% 1% <1% 13% 1% <1% 19 1 0
Maryland Somerset 29% 9% <1% 21% 6% <1% 33 9 0
Maryland St. Mary's 25% 3% <1% 17% 2% <1% 27 3 0
Maryland Talbot 19% 1% <1% 13% 1% <1% 20 1 0
Maryland Wicomico 25% 6% <1% 18% 4% <1% 28 6 0
Maryland Worcester 33% 13% 1% 24% 9% 1% 38 13 1
Massachusetts 44% 21% 4% 33% 14% 3% 56 22 4
Massachusetts Barnstable 24% 13% 2% 17% 9% 1% 26 13 2
Massachusetts Dukes 28% 11% 2% 20% 8% 1% 31 11 2
Massachusetts Essex 21% 7% 1% 14% 5% 1% 22 7 1
Massachusetts Nantucket 27% 14% 2% 19% 9% 1% 30 14 2
Massachusetts Norfolk 21% 7% 1% 15% 5% 1% 23 7 1
Massachusetts Plymouth 23% 10% 2% 16% 7% 1% 25 10 2
Massachusetts Suffolk 21% 7% 1% 14% 5% 1% 22 7 1
Mississippi 67% 39% 11% 53% 28% 8% 106 47 11
Mississippi Hancock 43% 21% 6% 32% 14% 4% 54 22 6
Mississippi Harrison 46% 24% 6% 34% 17% 4% 59 26 6
Mississippi Jackson 44% 22% 8% 32% 16% 6% 55 24 8
New Hampshire 25% 8% 2% 18% 6% 1% 28 8 2
New Hampshire Rockingham 21% 5% 1% 14% 3% 1% 22 5 1
New Jersey 31% 10% 1% 23% 7% 1% 36 10 1
New Jersey Atlantic 25% 10% 1% 17% 7% 1% 27 10 1
New Jersey Burlington 23% 8% <1% 16% 6% <1% 25 8 0
New Jersey Cape May 25% 10% 1% 18% 7% 1% 28 10 1
New Jersey Essex 19% 4% <1% 13% 3% <1% 20 4 0
New Jersey Hudson 19% 4% <1% 13% 3% <1% 20 4 0
New Jersey Middlesex 20% 5% <1% 14% 3% <1% 21 5 0
New Jersey Monmouth 23% 9% 1% 16% 6% 1% 25 9 1
New Jersey Ocean 25% 10% 1% 18% 7% 1% 28 10 1
New Jersey Salem 17% 2% <1% 12% 1% <1% 18 2 0
New Jersey Union 19% 4% <1% 13% 3% <1% 20 4 0
New York 36% 14% 3% 26% 9% 2% 43 14 3
New York Bronx 21% 7% 1% 15% 5% 1% 23 7 1
New York Kings 20% 6% <1% 14% 4% <1% 21 6 0
New York Nassau 22% 8% 2% 16% 6% 1% 24 8 2
New York New York 24% 9% 1% 17% 6% 1% 26 9 1
New York Queens 22% 8% 1% 16% 6% 1% 24 8 1
New York Richmond 21% 7% <1% 15% 5% <1% 23 7 0
New York Suffolk 29% 12% 3% 21% 8% 2% 33 12 3
New York Westchester 22% 7% 1% 16% 5% 1% 24 7 1
North Carolina 81% 51% 11% 68% 38% 8% 159 68 11
North Carolina Beaufort 50% 21% 1% 37% 14% 1% 66 22 1
North Carolina Bertie 45% 15% 1% 33% 10% 1% 57 15 1
North Carolina Brunswick 54% 29% 6% 41% 20% 4% 74 32 6
North Carolina Camden 47% 19% 1% 35% 13% 1% 61 20 1
North Carolina Carteret 62% 38% 6% 48% 28% 4% 92 46 6
North Carolina Chowan 40% 16% 1% 29% 11% 1% 49 17 1
North Carolina Craven 55% 28% 1% 42% 20% 1% 76 31 1
North Carolina Currituck 48% 21% 2% 36% 14% 1% 63 22 2
North Carolina Dare 63% 38% 6% 49% 27% 4% 94 45 6
North Carolina Gates 35% 12% <1% 25% 8% <1% 41 12 0
North Carolina Hertford 38% 11% <1% 28% 8% <1% 46 11 0
North Carolina Hyde 64% 38% 5% 50% 27% 3% 97 45 5
North Carolina New Hanover 53% 29% 6% 40% 20% 4% 71 32 6
North Carolina Onslow 54% 31% 5% 41% 22% 3% 74 35 5
North Carolina Pamlico 54% 28% 2% 40% 20% 1% 73 31 2
North Carolina Pasquotank 44% 18% 1% 32% 13% 1% 55 19 1
North Carolina Pender 55% 31% 6% 42% 22% 4% 76 35 6
North Carolina Perquimans 42% 17% 1% 31% 12% 1% 52 18 1
North Carolina Tyrrell 49% 24% 2% 36% 17% 1% 64 26 2
North Carolina Washington 46% 18% 1% 34% 13% 1% 58 19 1
Rhode Island 29% 11% 2% 20% 8% 1% 32 11 2
Rhode Island Bristol 20% 8% 2% 14% 6% 1% 21 8 2
Rhode Island Kent 21% 8% 1% 15% 6% 1% 23 8 1
Rhode Island Newport 23% 10% 2% 16% 7% 1% 25 10 2
Rhode Island Providence 23% 9% 1% 16% 6% 1% 25 9 1
Rhode Island Washington/South 25% 9% 2% 18% 6% 1% 28 9 2
South Carolina 71% 40% 12% 57% 29% 8% 118 48 12
South Carolina Beaufort 50% 21% 5% 38% 14% 3% 67 22 5
South Carolina Charleston 57% 29% 7% 43% 21% 5% 80 33 7
South Carolina Colleton 53% 24% 6% 40% 17% 4% 71 26 6
South Carolina Georgetown 49% 25% 6% 36% 17% 4% 64 27 6
South Carolina Horry 52% 29% 6% 39% 20% 4% 69 32 6
South Carolina Jasper 52% 20% 4% 39% 14% 3% 69 21 4
Texas 75% 49% 22% 61% 36% 16% 133 64 24
Texas Aransas 27% 15% 7% 19% 11% 5% 30 16 7
Texas Brazoria 41% 23% 7% 30% 16% 5% 51 25 7
Texas Calhoun 35% 19% 7% 25% 13% 5% 41 20 7
Texas Cameron 34% 19% 7% 24% 13% 5% 39 20 7
Texas Chambers 41% 22% 7% 30% 16% 5% 51 24 7
Texas Galveston 46% 26% 8% 34% 19% 6% 58 29 8
Texas Harris 40% 22% 6% 29% 16% 4% 49 24 6
Texas Jefferson 40% 23% 6% 29% 16% 4% 49 25 6
Texas Kenedy 34% 20% 10% 24% 14% 7% 39 21 10
Texas Kleberg 31% 18% 8% 23% 13% 6% 36 19 8
Texas Matagorda 43% 25% 11% 32% 17% 8% 54 27 11
Texas Nueces 34% 20% 9% 24% 14% 6% 39 21 9
Texas Refugio 30% 14% 6% 21% 9% 4% 34 14 6
Texas San Patricio 30% 16% 7% 21% 11% 5% 34 17 7
Texas Willacy 31% 18% 8% 22% 13% 6% 35 19 8
Virginia 59% 28% 2% 46% 20% 1% 86 31 2
Virginia Accomack 37% 13% <1% 27% 9% <1% 44 13 0
Virginia Gloucester 30% 7% <1% 21% 5% <1% 34 7 0
Virginia Hampton 37% 12% <1% 27% 8% <1% 44 12 0
Virginia Lancaster 28% 5% <1% 20% 3% <1% 31 5 0
Virginia Mathews 30% 7% <1% 21% 5% <1% 34 7 0
Virginia Middlesex 29% 5% <1% 21% 3% <1% 33 5 0
Virginia Newport News 31% 8% <1% 22% 6% <1% 35 8 0
Virginia Norfolk 36% 12% <1% 26% 8% <1% 42 12 0
Virginia Northampton 37% 13% <1% 27% 9% <1% 44 13 0
Virginia Northumberland 27% 5% <1% 19% 3% <1% 30 5 0
Virginia Poquoson 33% 9% <1% 24% 6% <1% 38 9 0
Virginia Portsmouth 33% 10% <1% 24% 7% <1% 38 10 0
Virginia Suffolk 35% 11% <1% 25% 8% <1% 41 11 0
Virginia Virginia Beach 41% 17% <1% 30% 12% <1% 50 18 0
Virginia York 34% 9% <1% 25% 6% <1% 40 9 0
Canada 65% 40% 2% 51% 29% 1% 100 48 2
New Brunswick 45% 11% 1% 33% 8% 1% 57 11 1
Newfoundland and Labrador 36% 22% 1% 26% 16% 1% 43 24 1
Nova Scotia 55% 37% 1% 42% 27% 1% 77 44 1
Prince Edward Island 14% 9% <1% 9% 6% <1% 14 9 0
Mexico 88% 58% 26% 76% 44% 19% 204 83 29
Campeche 61% 29% 7% 47% 21% 5% 89 33 7
Quintana Roo 77% 45% 21% 63% 33% 15% 139 57 23
Tabasco 34% 8% <1% 25% 6% <1% 40 8 0
Tamaulipas 61% 36% 14% 47% 26% 9% 89 43 14
Veracruz 58% 29% 4% 44% 20% 3% 83 32 4
Yucatan 67% 36% 17% 53% 26% 12% 107 43 18
Anguilla 47% 25% 12% 35% 18% 8% 61 28 12
Antigua and Barbuda 38% 21% 10% 28% 15% 7% 46 23 10
Aruba 15% 7% <1% 10% 5% <1% 15 7 0
Bahamas, The 92% 67% 41% 81% 53% 30% 237 106 50
Barbados 39% 9% 2% 28% 6% 1% 47 9 2
Belize 55% 27% 9% 42% 19% 6% 76 30 9
Bermuda 53% 36% 16% 40% 26% 11% 71 42 17
Bonaire 11% 5% <1% 8% 3% <1% 11 5 0
Cabo Verde 23% 4% <1% 16% 3% <1% 25 4 0
Cayman Islands 53% 32% 11% 40% 23% 8% 71 37 11
Costa Rica 8% 3% 1% 6% 2% 1% 8 3 1
Cuba 88% 66% 35% 76% 51% 25% 204 102 41
Curacao 13% 6% <1% 9% 4% <1% 13 6 0
Dominica 45% 20% 10% 33% 14% 7% 57 21 10
Dominican Republic 72% 47% 24% 58% 35% 17% 123 61 26
Grenada 38% 10% 1% 28% 7% 1% 46 10 1
Guadeloupe 46% 25% 10% 34% 18% 7% 59 28 10
Guatemala 51% 21% 4% 38% 15% 3% 68 23 4
Haiti 58% 36% 14% 44% 26% 9% 82 42 14
Honduras 78% 38% 15% 64% 28% 11% 146 46 16
Jamaica 60% 31% 12% 46% 23% 8% 88 36 12
Martinique 46% 16% 6% 34% 11% 4% 59 17 6
Montserrat 36% 21% 8% 26% 14% 6% 43 22 8
Nicaragua 48% 23% 11% 36% 16% 8% 62 25 11
Panama 2% 1% <1% 1% 1% <1% 2 1 0
Puerto Rico 54% 33% 14% 40% 24% 9% 73 38 14
Saba 34% 21% 9% 24% 15% 6% 39 23 9
Saint Kitts and Nevis 46% 29% 13% 34% 20% 9% 59 32 13
Saint Lucia 54% 15% 5% 40% 10% 3% 73 15 5
Saint Martin 36% 21% 11% 26% 15% 8% 43 23 11
Saint Vincent and the Grenadines 54% 13% 2% 41% 9% 1% 74 13 2
Sint Eustatius 34% 21% 11% 25% 15% 8% 40 23 11
Sint Maarten 36% 21% 11% 26% 15% 8% 43 23 11
Trinidad and Tobago 11% 3% <1% 8% 2% <1% 11 3 0
Turks and Caicos 54% 29% 15% 40% 20% 11% 73 32 16
UK Virgin Islands 52% 31% 15% 39% 22% 10% 69 35 15
US Virgin Islands 45% 27% 12% 33% 19% 8% 57 30 12