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 73% 39% 12% 58% 28% 8% 123 46 12
Alabama Baldwin 55% 26% 9% 41% 18% 6% 75 28 9
Alabama Mobile 51% 26% 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 23% 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 32% 9% 1% 23% 6% 1% 36 9 1
Delaware Kent 22% 4% <1% 15% 3% <1% 23 4 0
Delaware New Castle 18% 1% <1% 12% 1% <1% 18 1 0
Delaware Sussex 29% 9% 1% 20% 6% 1% 32 9 1
Florida 95% 71% 40% 86% 56% 29% 274 115 48
Florida Bay 46% 24% 7% 34% 17% 5% 58 26 7
Florida Brevard 57% 24% 8% 42% 17% 6% 78 26 8
Florida Broward 56% 32% 16% 42% 23% 11% 77 36 16
Florida Charlotte 51% 24% 15% 38% 17% 10% 67 26 15
Florida Citrus 47% 24% 4% 34% 17% 3% 59 26 4
Florida Collier 56% 31% 19% 42% 21% 13% 77 34 19
Florida Dixie 48% 19% 2% 35% 13% 1% 61 19 2
Florida Duval 51% 21% 5% 38% 14% 3% 67 22 5
Florida Escambia 52% 25% 10% 39% 17% 7% 69 27 10
Florida Flagler 47% 21% 3% 34% 14% 2% 59 22 3
Florida Franklin 48% 20% 4% 35% 14% 3% 60 21 4
Florida Gulf 47% 22% 4% 34% 15% 3% 59 23 4
Florida Hernando 46% 24% 6% 34% 17% 4% 58 26 6
Florida Hillsborough 49% 25% 10% 36% 17% 7% 63 27 10
Florida Indian River 50% 24% 9% 37% 17% 6% 65 26 9
Florida Jefferson 45% 14% 1% 33% 9% 1% 56 14 1
Florida Lee 53% 26% 17% 40% 18% 11% 71 28 17
Florida Levy 49% 21% 4% 36% 14% 3% 62 22 4
Florida Manatee 50% 26% 11% 37% 18% 8% 65 28 11
Florida Martin 51% 25% 10% 38% 17% 7% 67 27 10
Florida Miami-Dade 57% 33% 20% 43% 23% 14% 79 37 21
Florida Monroe 67% 42% 24% 52% 30% 17% 103 50 26
Florida Nassau 52% 19% 5% 39% 13% 3% 69 20 5
Florida Okaloosa 49% 23% 8% 36% 16% 6% 62 24 8
Florida Palm Beach 56% 31% 13% 42% 21% 9% 77 34 13
Florida Pasco 49% 24% 7% 36% 17% 5% 63 26 7
Florida Pinellas 50% 24% 10% 36% 17% 7% 64 26 10
Florida Santa Rosa 48% 24% 8% 35% 16% 6% 61 25 8
Florida Sarasota 49% 24% 12% 36% 17% 8% 63 26 12
Florida St. Johns 52% 22% 5% 38% 15% 3% 68 23 5
Florida St. Lucie 49% 22% 8% 36% 15% 6% 63 23 8
Florida Taylor 49% 16% 1% 36% 11% 1% 62 16 1
Florida Volusia 52% 24% 3% 39% 17% 2% 69 26 3
Florida Wakulla 44% 18% 2% 32% 12% 1% 54 18 2
Florida Walton 48% 24% 8% 35% 17% 6% 60 26 8
Georgia 78% 42% 9% 63% 30% 6% 140 51 9
Georgia Bryan 52% 20% 3% 39% 14% 2% 69 21 3
Georgia Camden 54% 18% 5% 40% 12% 3% 72 18 5
Georgia Chatham 54% 21% 4% 40% 14% 3% 72 22 4
Georgia Glynn 50% 15% 5% 36% 10% 3% 64 15 5
Georgia Liberty 54% 21% 4% 40% 14% 3% 72 22 4
Georgia McIntosh 52% 20% 4% 39% 14% 3% 69 21 4
Louisiana 80% 52% 21% 66% 38% 14% 151 68 22
Louisiana Cameron 44% 22% 7% 31% 15% 5% 53 23 7
Louisiana Iberia 47% 24% 7% 34% 16% 5% 59 25 7
Louisiana Jefferson 51% 28% 8% 38% 19% 6% 67 30 8
Louisiana Lafourche 53% 30% 8% 40% 21% 6% 71 33 8
Louisiana Orleans 44% 22% 6% 32% 15% 4% 54 23 6
Louisiana Plaquemines 58% 31% 10% 43% 22% 7% 80 35 10
Louisiana St. Bernard 55% 30% 11% 41% 21% 8% 74 33 11
Louisiana St. Mary 48% 25% 6% 35% 17% 4% 61 27 6
Louisiana St. Tammany 46% 23% 6% 34% 16% 4% 58 24 6
Louisiana Terrebonne 57% 31% 9% 43% 21% 6% 79 34 9
Louisiana Vermilion 43% 23% 7% 31% 16% 5% 52 24 7
Maine 31% 10% 2% 21% 7% 1% 34 10 2
Maine Cumberland 18% 3% <1% 12% 2% <1% 18 3 0
Maine Hancock 16% 6% 1% 11% 4% 1% 16 6 1
Maine Knox 19% 6% 1% 13% 4% 1% 20 6 1
Maine Lincoln 16% 3% <1% 11% 2% <1% 16 3 0
Maine Sagadahoc 17% 3% <1% 11% 2% <1% 17 3 0
Maine Waldo 15% 3% <1% 10% 2% <1% 15 3 0
Maine Washington 18% 6% 1% 12% 4% 1% 18 6 1
Maine York 21% 5% 1% 14% 3% 1% 22 5 1
Maryland 43% 16% 1% 31% 11% 1% 52 16 1
Maryland Anne Arundel 18% 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 18% 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 18% 0% <1% 12% 0% <1% 18 0 0
Maryland Queen Anne's 19% 1% <1% 13% 1% <1% 19 1 0
Maryland Somerset 30% 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 26% 6% <1% 18% 4% <1% 28 6 0
Maryland Worcester 34% 13% 1% 24% 9% 1% 38 13 1
Massachusetts 45% 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 28% 14% 2% 19% 9% 1% 30 14 2
Massachusetts Norfolk 22% 7% 1% 15% 5% 1% 23 7 1
Massachusetts Plymouth 24% 10% 2% 16% 7% 1% 25 10 2
Massachusetts Suffolk 21% 7% 1% 14% 5% 1% 22 7 1
Mississippi 68% 40% 11% 53% 28% 8% 106 47 11
Mississippi Hancock 44% 21% 6% 32% 14% 4% 54 22 6
Mississippi Harrison 47% 24% 6% 34% 17% 4% 59 26 6
Mississippi Jackson 45% 23% 8% 32% 16% 6% 55 24 8
New Hampshire 26% 8% 2% 18% 6% 1% 28 8 2
New Hampshire Rockingham 21% 5% 1% 14% 3% 1% 22 5 1
New Jersey 32% 10% 1% 23% 7% 1% 36 10 1
New Jersey Atlantic 25% 10% 1% 17% 7% 1% 27 10 1
New Jersey Burlington 24% 8% <1% 16% 6% <1% 25 8 0
New Jersey Cape May 26% 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 24% 9% 1% 16% 6% 1% 25 9 1
New Jersey Ocean 26% 10% 1% 18% 7% 1% 28 10 1
New Jersey Salem 18% 2% <1% 12% 1% <1% 18 2 0
New Jersey Union 19% 4% <1% 13% 3% <1% 20 4 0
New York 37% 14% 3% 26% 9% 2% 43 14 3
New York Bronx 22% 7% 1% 15% 5% 1% 23 7 1
New York Kings 20% 6% <1% 14% 4% <1% 21 6 0
New York Nassau 23% 8% 2% 16% 6% 1% 24 8 2
New York New York 24% 9% 1% 17% 6% 1% 26 9 1
New York Queens 23% 8% 1% 16% 6% 1% 24 8 1
New York Richmond 22% 7% <1% 15% 5% <1% 23 7 0
New York Suffolk 30% 12% 3% 21% 8% 2% 33 12 3
New York Westchester 23% 7% 1% 16% 5% 1% 24 7 1
North Carolina 82% 52% 11% 68% 38% 8% 159 68 11
North Carolina Beaufort 51% 21% 1% 37% 14% 1% 66 22 1
North Carolina Bertie 46% 15% 1% 33% 10% 1% 57 15 1
North Carolina Brunswick 55% 29% 6% 41% 20% 4% 74 32 6
North Carolina Camden 48% 19% 1% 35% 13% 1% 61 20 1
North Carolina Carteret 63% 39% 6% 48% 28% 4% 92 46 6
North Carolina Chowan 41% 17% 1% 29% 11% 1% 49 17 1
North Carolina Craven 56% 28% 1% 42% 20% 1% 76 31 1
North Carolina Currituck 49% 21% 2% 36% 14% 1% 63 22 2
North Carolina Dare 64% 38% 6% 49% 27% 4% 94 45 6
North Carolina Gates 36% 12% <1% 25% 8% <1% 41 12 0
North Carolina Hertford 39% 11% <1% 28% 8% <1% 46 11 0
North Carolina Hyde 65% 38% 5% 50% 27% 3% 97 45 5
North Carolina New Hanover 53% 29% 6% 40% 20% 4% 71 32 6
North Carolina Onslow 55% 31% 5% 41% 22% 3% 74 35 5
North Carolina Pamlico 54% 28% 2% 40% 20% 1% 73 31 2
North Carolina Pasquotank 45% 19% 1% 32% 13% 1% 55 19 1
North Carolina Pender 56% 31% 6% 42% 22% 4% 76 35 6
North Carolina Perquimans 43% 18% 1% 31% 12% 1% 52 18 1
North Carolina Tyrrell 50% 24% 2% 36% 17% 1% 64 26 2
North Carolina Washington 46% 19% 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 22% 8% 1% 15% 6% 1% 23 8 1
Rhode Island Newport 24% 10% 2% 16% 7% 1% 25 10 2
Rhode Island Providence 24% 9% 1% 16% 6% 1% 25 9 1
Rhode Island Washington/South 26% 9% 2% 18% 6% 1% 28 9 2
South Carolina 72% 40% 12% 57% 29% 8% 118 48 12
South Carolina Beaufort 51% 21% 5% 38% 14% 3% 67 22 5
South Carolina Charleston 58% 30% 7% 43% 21% 5% 80 33 7
South Carolina Colleton 53% 24% 6% 40% 17% 4% 71 26 6
South Carolina Georgetown 50% 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 76% 50% 23% 61% 36% 16% 133 64 24
Texas Aransas 28% 16% 7% 19% 11% 5% 30 16 7
Texas Brazoria 42% 24% 7% 30% 16% 5% 51 25 7
Texas Calhoun 36% 19% 7% 25% 13% 5% 41 20 7
Texas Cameron 34% 19% 7% 24% 13% 5% 39 20 7
Texas Chambers 42% 23% 7% 30% 16% 5% 51 24 7
Texas Galveston 46% 27% 8% 34% 19% 6% 58 29 8
Texas Harris 41% 23% 6% 29% 16% 4% 49 24 6
Texas Jefferson 41% 24% 6% 29% 16% 4% 49 25 6
Texas Kenedy 34% 20% 10% 24% 14% 7% 39 21 10
Texas Kleberg 32% 19% 8% 23% 13% 6% 36 19 8
Texas Matagorda 44% 25% 11% 32% 17% 8% 54 27 11
Texas Nueces 34% 20% 9% 24% 14% 6% 39 21 9
Texas Refugio 31% 14% 6% 21% 9% 4% 34 14 6
Texas San Patricio 31% 17% 7% 21% 11% 5% 34 17 7
Texas Willacy 31% 19% 8% 22% 13% 6% 35 19 8
Virginia 60% 28% 2% 46% 20% 1% 86 31 2
Virginia Accomack 38% 13% <1% 27% 9% <1% 44 13 0
Virginia Gloucester 31% 7% <1% 21% 5% <1% 34 7 0
Virginia Hampton 38% 12% <1% 27% 8% <1% 44 12 0
Virginia Lancaster 28% 5% <1% 20% 3% <1% 31 5 0
Virginia Mathews 31% 7% <1% 21% 5% <1% 34 7 0
Virginia Middlesex 30% 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 38% 13% <1% 27% 9% <1% 44 13 0
Virginia Northumberland 28% 5% <1% 19% 3% <1% 30 5 0
Virginia Poquoson 34% 9% <1% 24% 6% <1% 38 9 0
Virginia Portsmouth 34% 10% <1% 24% 7% <1% 38 10 0
Virginia Suffolk 36% 11% <1% 25% 8% <1% 41 11 0
Virginia Virginia Beach 42% 18% <1% 30% 12% <1% 50 18 0
Virginia York 35% 9% <1% 25% 6% <1% 40 9 0
Canada 66% 40% 2% 51% 29% 1% 100 48 2
New Brunswick 46% 11% 1% 33% 8% 1% 57 11 1
Newfoundland and Labrador 37% 23% 1% 26% 16% 1% 43 24 1
Nova Scotia 56% 38% 1% 42% 27% 1% 77 44 1
Prince Edward Island 14% 9% <1% 9% 6% <1% 14 9 0
Mexico 89% 59% 27% 76% 44% 19% 204 83 29
Campeche 62% 30% 7% 47% 21% 5% 89 33 7
Quintana Roo 78% 46% 22% 63% 33% 15% 139 57 23
Tabasco 35% 8% <1% 25% 6% <1% 40 8 0
Tamaulipas 62% 37% 14% 47% 26% 9% 89 43 14
Veracruz 59% 29% 4% 44% 20% 3% 83 32 4
Yucatan 68% 37% 18% 53% 26% 12% 107 43 18
Anguilla 48% 26% 12% 35% 18% 8% 61 28 12
Antigua and Barbuda 39% 22% 10% 28% 15% 7% 46 23 10
Aruba 15% 7% <1% 10% 5% <1% 15 7 0
Bahamas, The 92% 68% 42% 81% 53% 30% 237 106 50
Barbados 40% 9% 2% 28% 6% 1% 47 9 2
Belize 56% 28% 9% 42% 19% 6% 76 30 9
Bermuda 53% 36% 17% 40% 26% 11% 71 42 17
Bonaire 11% 5% <1% 8% 3% <1% 11 5 0
Cabo Verde 24% 4% <1% 16% 3% <1% 25 4 0
Cayman Islands 53% 33% 11% 40% 23% 8% 71 37 11
Costa Rica 8% 3% 1% 6% 2% 1% 8 3 1
Cuba 89% 67% 36% 76% 51% 25% 204 102 41
Curacao 13% 6% <1% 9% 4% <1% 13 6 0
Dominica 46% 20% 10% 33% 14% 7% 57 21 10
Dominican Republic 73% 48% 24% 58% 35% 17% 123 61 26
Grenada 39% 10% 1% 28% 7% 1% 46 10 1
Guadeloupe 47% 26% 10% 34% 18% 7% 59 28 10
Guatemala 52% 22% 4% 38% 15% 3% 68 23 4
Haiti 59% 36% 14% 44% 26% 9% 82 42 14
Honduras 79% 39% 16% 64% 28% 11% 146 46 16
Jamaica 61% 32% 12% 46% 23% 8% 88 36 12
Martinique 47% 17% 6% 34% 11% 4% 59 17 6
Montserrat 37% 21% 8% 26% 14% 6% 43 22 8
Nicaragua 49% 24% 11% 36% 16% 8% 62 25 11
Panama 2% 1% <1% 1% 1% <1% 2 1 0
Puerto Rico 54% 34% 14% 40% 24% 9% 73 38 14
Saba 34% 22% 9% 24% 15% 6% 39 23 9
Saint Kitts and Nevis 47% 29% 13% 34% 20% 9% 59 32 13
Saint Lucia 54% 15% 5% 40% 10% 3% 73 15 5
Saint Martin 37% 22% 11% 26% 15% 8% 43 23 11
Saint Vincent and the Grenadines 55% 13% 2% 41% 9% 1% 74 13 2
Sint Eustatius 35% 22% 11% 25% 15% 8% 40 23 11
Sint Maarten 37% 22% 11% 26% 15% 8% 43 23 11
Trinidad and Tobago 11% 3% <1% 8% 2% <1% 11 3 0
Turks and Caicos 54% 29% 16% 40% 20% 11% 73 32 16
UK Virgin Islands 52% 31% 15% 39% 22% 10% 69 35 15
US Virgin Islands 46% 28% 12% 33% 19% 8% 57 30 12