Resources Created by the CSU Tropical Group

Forecasting and Research Resources

CSU Tropical Cyclone Impact Probabilities

We are using a new methodology for calculating 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 78% 43% 14% 58% 28% 8% 123 46 12
Alabama Baldwin 60% 29% 10% 41% 18% 6% 75 28 9
Alabama Mobile 56% 29% 9% 38% 18% 6% 67 28 8
Connecticut 35% 13% 2% 22% 8% 1% 35 11 2
Connecticut Fairfield 28% 10% 2% 17% 6% 1% 27 9 2
Connecticut Middlesex 25% 11% 2% 16% 7% 1% 24 10 2
Connecticut New Haven 32% 13% 2% 20% 8% 1% 32 11 2
Connecticut New London 28% 11% 2% 17% 7% 1% 27 10 2
Delaware 35% 10% 1% 23% 6% 1% 36 9 1
Delaware Kent 24% 5% <1% 15% 3% <1% 23 4 0
Delaware New Castle 20% 1% <1% 12% 1% <1% 18 1 0
Delaware Sussex 32% 10% 1% 20% 6% 1% 32 9 1
Florida 96% 75% 44% 86% 56% 29% 274 115 48
Florida Bay 51% 27% 8% 34% 17% 5% 58 26 7
Florida Brevard 61% 27% 9% 42% 17% 6% 78 26 8
Florida Broward 61% 35% 18% 42% 23% 11% 77 36 16
Florida Charlotte 56% 27% 17% 38% 17% 10% 67 26 15
Florida Citrus 51% 27% 5% 34% 17% 3% 59 26 4
Florida Collier 61% 34% 21% 42% 21% 13% 77 34 19
Florida Dixie 52% 21% 2% 35% 13% 1% 61 19 2
Florida Duval 56% 23% 6% 38% 14% 3% 67 22 5
Florida Escambia 57% 28% 11% 39% 17% 7% 69 27 10
Florida Flagler 51% 23% 4% 34% 14% 2% 59 22 3
Florida Franklin 52% 23% 5% 35% 14% 3% 60 21 4
Florida Gulf 51% 24% 5% 34% 15% 3% 59 23 4
Florida Hernando 51% 27% 7% 34% 17% 4% 58 26 6
Florida Hillsborough 53% 28% 11% 36% 17% 7% 63 27 10
Florida Indian River 55% 27% 10% 37% 17% 6% 65 26 9
Florida Jefferson 49% 16% 1% 33% 9% 1% 56 14 1
Florida Lee 58% 29% 19% 40% 18% 11% 71 28 17
Florida Levy 53% 23% 5% 36% 14% 3% 62 22 4
Florida Manatee 55% 29% 13% 37% 18% 8% 65 28 11
Florida Martin 56% 28% 11% 38% 17% 7% 67 27 10
Florida Miami-Dade 62% 36% 23% 43% 23% 14% 79 37 21
Florida Monroe 71% 46% 27% 52% 30% 17% 103 50 26
Florida Nassau 57% 22% 6% 39% 13% 3% 69 20 5
Florida Okaloosa 53% 25% 9% 36% 16% 6% 62 24 8
Florida Palm Beach 61% 34% 15% 42% 21% 9% 77 34 13
Florida Pasco 53% 27% 8% 36% 17% 5% 63 26 7
Florida Pinellas 54% 27% 11% 36% 17% 7% 64 26 10
Florida Santa Rosa 52% 26% 9% 35% 16% 6% 61 25 8
Florida Sarasota 53% 27% 14% 36% 17% 8% 63 26 12
Florida St. Johns 56% 24% 6% 38% 15% 3% 68 23 5
Florida St. Lucie 53% 24% 9% 36% 15% 6% 63 23 8
Florida Taylor 53% 18% 1% 36% 11% 1% 62 16 1
Florida Volusia 57% 27% 4% 39% 17% 2% 69 26 3
Florida Wakulla 48% 20% 2% 32% 12% 1% 54 18 2
Florida Walton 52% 27% 9% 35% 17% 6% 60 26 8
Georgia 82% 46% 10% 63% 30% 6% 140 51 9
Georgia Bryan 57% 23% 4% 39% 14% 2% 69 21 3
Georgia Camden 58% 20% 6% 40% 12% 3% 72 18 5
Georgia Chatham 58% 23% 5% 40% 14% 3% 72 22 4
Georgia Glynn 54% 17% 6% 36% 10% 3% 64 15 5
Georgia Liberty 58% 23% 5% 40% 14% 3% 72 22 4
Georgia McIntosh 57% 23% 5% 39% 14% 3% 69 21 4
Louisiana 84% 56% 23% 66% 38% 14% 151 68 22
Louisiana Cameron 47% 24% 8% 31% 15% 5% 53 23 7
Louisiana Iberia 51% 26% 8% 34% 16% 5% 59 25 7
Louisiana Jefferson 56% 31% 9% 38% 19% 6% 67 30 8
Louisiana Lafourche 58% 33% 9% 40% 21% 6% 71 33 8
Louisiana Orleans 48% 24% 7% 32% 15% 4% 54 23 6
Louisiana Plaquemines 62% 35% 11% 43% 22% 7% 80 35 10
Louisiana St. Bernard 59% 33% 13% 41% 21% 8% 74 33 11
Louisiana St. Mary 52% 28% 7% 35% 17% 4% 61 27 6
Louisiana St. Tammany 51% 25% 7% 34% 16% 4% 58 24 6
Louisiana Terrebonne 62% 34% 10% 43% 21% 6% 79 34 9
Louisiana Vermilion 47% 25% 8% 31% 16% 5% 52 24 7
Maine 34% 11% 2% 21% 7% 1% 34 10 2
Maine Cumberland 20% 4% <1% 12% 2% <1% 18 3 0
Maine Hancock 18% 7% 1% 11% 4% 1% 16 6 1
Maine Knox 22% 7% 1% 13% 4% 1% 20 6 1
Maine Lincoln 18% 4% <1% 11% 2% <1% 16 3 0
Maine Sagadahoc 19% 4% <1% 11% 2% <1% 17 3 0
Maine Waldo 17% 4% <1% 10% 2% <1% 15 3 0
Maine Washington 20% 7% 1% 12% 4% 1% 18 6 1
Maine York 23% 6% 1% 14% 3% 1% 22 5 1
Maryland 47% 18% 1% 31% 11% 1% 52 16 1
Maryland Anne Arundel 20% 1% <1% 12% 1% <1% 18 1 0
Maryland Baltimore 17% 1% <1% 10% 1% <1% 15 1 0
Maryland Baltimore City 14% 1% <1% 8% 1% <1% 12 1 0
Maryland Calvert 23% 2% <1% 14% 1% <1% 21 2 0
Maryland Cecil 20% 1% <1% 12% 1% <1% 18 1 0
Maryland Dorchester 27% 6% <1% 17% 3% <1% 26 5 0
Maryland Harford 17% 0% <1% 10% 0% <1% 15 0 0
Maryland Kent 20% 0% <1% 12% 0% <1% 18 0 0
Maryland Queen Anne's 21% 1% <1% 13% 1% <1% 19 1 0
Maryland Somerset 33% 10% <1% 21% 6% <1% 33 9 0
Maryland St. Mary's 28% 4% <1% 17% 2% <1% 27 3 0
Maryland Talbot 22% 1% <1% 13% 1% <1% 20 1 0
Maryland Wicomico 29% 7% <1% 18% 4% <1% 28 6 0
Maryland Worcester 37% 15% 1% 24% 9% 1% 38 13 1
Massachusetts 49% 23% 5% 33% 14% 3% 56 22 4
Massachusetts Barnstable 27% 15% 2% 17% 9% 1% 26 13 2
Massachusetts Dukes 31% 13% 2% 20% 8% 1% 31 11 2
Massachusetts Essex 23% 8% 1% 14% 5% 1% 22 7 1
Massachusetts Nantucket 31% 16% 2% 19% 9% 1% 30 14 2
Massachusetts Norfolk 24% 8% 1% 15% 5% 1% 23 7 1
Massachusetts Plymouth 26% 11% 2% 16% 7% 1% 25 10 2
Massachusetts Suffolk 23% 8% 1% 14% 5% 1% 22 7 1
Mississippi 72% 43% 13% 53% 28% 8% 106 47 11
Mississippi Hancock 48% 23% 7% 32% 14% 4% 54 22 6
Mississippi Harrison 51% 27% 7% 34% 17% 4% 59 26 6
Mississippi Jackson 49% 25% 9% 32% 16% 6% 55 24 8
New Hampshire 29% 9% 2% 18% 6% 1% 28 8 2
New Hampshire Rockingham 23% 6% 1% 14% 3% 1% 22 5 1
New Jersey 35% 11% 1% 23% 7% 1% 36 10 1
New Jersey Atlantic 28% 11% 1% 17% 7% 1% 27 10 1
New Jersey Burlington 26% 9% <1% 16% 6% <1% 25 8 0
New Jersey Cape May 29% 11% 1% 18% 7% 1% 28 10 1
New Jersey Essex 22% 5% <1% 13% 3% <1% 20 4 0
New Jersey Hudson 22% 5% <1% 13% 3% <1% 20 4 0
New Jersey Middlesex 23% 6% <1% 14% 3% <1% 21 5 0
New Jersey Monmouth 26% 10% 1% 16% 6% 1% 25 9 1
New Jersey Ocean 29% 11% 1% 18% 7% 1% 28 10 1
New Jersey Salem 20% 2% <1% 12% 1% <1% 18 2 0
New Jersey Union 22% 5% <1% 13% 3% <1% 20 4 0
New York 41% 16% 4% 26% 9% 2% 43 14 3
New York Bronx 24% 8% 1% 15% 5% 1% 23 7 1
New York Kings 23% 7% <1% 14% 4% <1% 21 6 0
New York Nassau 25% 9% 2% 16% 6% 1% 24 8 2
New York New York 27% 10% 1% 17% 6% 1% 26 9 1
New York Queens 25% 9% 1% 16% 6% 1% 24 8 1
New York Richmond 24% 8% <1% 15% 5% <1% 23 7 0
New York Suffolk 33% 14% 4% 21% 8% 2% 33 12 3
New York Westchester 25% 8% 1% 16% 5% 1% 24 7 1
North Carolina 85% 56% 13% 68% 38% 8% 159 68 11
North Carolina Beaufort 55% 23% 1% 37% 14% 1% 66 22 1
North Carolina Bertie 50% 17% 1% 33% 10% 1% 57 15 1
North Carolina Brunswick 59% 32% 7% 41% 20% 4% 74 32 6
North Carolina Camden 52% 22% 1% 35% 13% 1% 61 20 1
North Carolina Carteret 67% 43% 7% 48% 28% 4% 92 46 6
North Carolina Chowan 45% 19% 1% 29% 11% 1% 49 17 1
North Carolina Craven 60% 31% 1% 42% 20% 1% 76 31 1
North Carolina Currituck 53% 23% 2% 36% 14% 1% 63 22 2
North Carolina Dare 68% 42% 7% 49% 27% 4% 94 45 6
North Carolina Gates 39% 14% <1% 25% 8% <1% 41 12 0
North Carolina Hertford 43% 13% <1% 28% 8% <1% 46 11 0
North Carolina Hyde 69% 42% 6% 50% 27% 3% 97 45 5
North Carolina New Hanover 58% 32% 7% 40% 20% 4% 71 32 6
North Carolina Onslow 59% 35% 6% 41% 22% 3% 74 35 5
North Carolina Pamlico 59% 31% 2% 40% 20% 1% 73 31 2
North Carolina Pasquotank 49% 21% 1% 32% 13% 1% 55 19 1
North Carolina Pender 60% 35% 7% 42% 22% 4% 76 35 6
North Carolina Perquimans 47% 20% 1% 31% 12% 1% 52 18 1
North Carolina Tyrrell 54% 27% 2% 36% 17% 1% 64 26 2
North Carolina Washington 51% 21% 1% 34% 13% 1% 58 19 1
Rhode Island 32% 13% 2% 20% 8% 1% 32 11 2
Rhode Island Bristol 23% 9% 2% 14% 6% 1% 21 8 2
Rhode Island Kent 24% 9% 1% 15% 6% 1% 23 8 1
Rhode Island Newport 26% 11% 2% 16% 7% 1% 25 10 2
Rhode Island Providence 26% 10% 1% 16% 6% 1% 25 9 1
Rhode Island Washington/South 29% 10% 2% 18% 6% 1% 28 9 2
South Carolina 76% 44% 14% 57% 29% 8% 118 48 12
South Carolina Beaufort 56% 23% 6% 38% 14% 3% 67 22 5
South Carolina Charleston 62% 33% 8% 43% 21% 5% 80 33 7
South Carolina Colleton 58% 27% 7% 40% 17% 4% 71 26 6
South Carolina Georgetown 54% 28% 7% 36% 17% 4% 64 27 6
South Carolina Horry 57% 32% 7% 39% 20% 4% 69 32 6
South Carolina Jasper 57% 23% 5% 39% 14% 3% 69 21 4
Texas 80% 54% 25% 61% 36% 16% 133 64 24
Texas Aransas 31% 18% 8% 19% 11% 5% 30 16 7
Texas Brazoria 46% 26% 8% 30% 16% 5% 51 25 7
Texas Calhoun 39% 22% 8% 25% 13% 5% 41 20 7
Texas Cameron 38% 22% 8% 24% 13% 5% 39 20 7
Texas Chambers 46% 25% 8% 30% 16% 5% 51 24 7
Texas Galveston 51% 30% 9% 34% 19% 6% 58 29 8
Texas Harris 45% 25% 7% 29% 16% 4% 49 24 6
Texas Jefferson 45% 26% 7% 29% 16% 4% 49 25 6
Texas Kenedy 38% 23% 11% 24% 14% 7% 39 21 10
Texas Kleberg 35% 21% 9% 23% 13% 6% 36 19 8
Texas Matagorda 48% 28% 13% 32% 17% 8% 54 27 11
Texas Nueces 38% 23% 10% 24% 14% 6% 39 21 9
Texas Refugio 34% 16% 7% 21% 9% 4% 34 14 6
Texas San Patricio 34% 19% 8% 21% 11% 5% 34 17 7
Texas Willacy 35% 21% 9% 22% 13% 6% 35 19 8
Virginia 65% 31% 2% 46% 20% 1% 86 31 2
Virginia Accomack 41% 15% <1% 27% 9% <1% 44 13 0
Virginia Gloucester 34% 8% <1% 21% 5% <1% 34 7 0
Virginia Hampton 41% 14% <1% 27% 8% <1% 44 12 0
Virginia Lancaster 31% 6% <1% 20% 3% <1% 31 5 0
Virginia Mathews 34% 8% <1% 21% 5% <1% 34 7 0
Virginia Middlesex 33% 6% <1% 21% 3% <1% 33 5 0
Virginia Newport News 35% 9% <1% 22% 6% <1% 35 8 0
Virginia Norfolk 40% 14% <1% 26% 8% <1% 42 12 0
Virginia Northampton 41% 15% <1% 27% 9% <1% 44 13 0
Virginia Northumberland 31% 6% <1% 19% 3% <1% 30 5 0
Virginia Poquoson 37% 10% <1% 24% 6% <1% 38 9 0
Virginia Portsmouth 37% 11% <1% 24% 7% <1% 38 10 0
Virginia Suffolk 39% 13% <1% 25% 8% <1% 41 11 0
Virginia Virginia Beach 46% 20% <1% 30% 12% <1% 50 18 0
Virginia York 38% 10% <1% 25% 6% <1% 40 9 0
Canada 70% 44% 2% 51% 29% 1% 100 48 2
New Brunswick 50% 13% 1% 33% 8% 1% 57 11 1
Newfoundland and Labrador 41% 25% 1% 26% 16% 1% 43 24 1
Nova Scotia 61% 41% 1% 42% 27% 1% 77 44 1
Prince Edward Island 16% 10% <1% 9% 6% <1% 14 9 0
Mexico 92% 64% 30% 76% 44% 19% 204 83 29
Campeche 66% 33% 8% 47% 21% 5% 89 33 7
Quintana Roo 82% 50% 24% 63% 33% 15% 139 57 23
Tabasco 38% 9% <1% 25% 6% <1% 40 8 0
Tamaulipas 66% 41% 16% 47% 26% 9% 89 43 14
Veracruz 64% 32% 5% 44% 20% 3% 83 32 4
Yucatan 73% 41% 20% 53% 26% 12% 107 43 18
Anguilla 52% 29% 14% 35% 18% 8% 61 28 12
Antigua and Barbuda 43% 24% 11% 28% 15% 7% 46 23 10
Aruba 17% 8% <1% 10% 5% <1% 15 7 0
Bahamas, The 94% 72% 46% 81% 53% 30% 237 106 50
Barbados 43% 10% 2% 28% 6% 1% 47 9 2
Belize 60% 31% 10% 42% 19% 6% 76 30 9
Bermuda 58% 40% 19% 40% 26% 11% 71 42 17
Bonaire 13% 6% <1% 8% 3% <1% 11 5 0
Cabo Verde 26% 5% <1% 16% 3% <1% 25 4 0
Cayman Islands 58% 36% 13% 40% 23% 8% 71 37 11
Costa Rica 9% 4% 1% 6% 2% 1% 8 3 1
Cuba 92% 71% 39% 76% 51% 25% 204 102 41
Curacao 15% 7% <1% 9% 4% <1% 13 6 0
Dominica 50% 23% 11% 33% 14% 7% 57 21 10
Dominican Republic 78% 52% 27% 58% 35% 17% 123 61 26
Grenada 43% 11% 1% 28% 7% 1% 46 10 1
Guadeloupe 51% 29% 11% 34% 18% 7% 59 28 10
Guatemala 56% 24% 5% 38% 15% 3% 68 23 4
Haiti 63% 40% 16% 44% 26% 9% 82 42 14
Honduras 83% 43% 18% 64% 28% 11% 146 46 16
Jamaica 66% 35% 14% 46% 23% 8% 88 36 12
Martinique 51% 19% 7% 34% 11% 4% 59 17 6
Montserrat 41% 23% 9% 26% 14% 6% 43 22 8
Nicaragua 53% 26% 13% 36% 16% 8% 62 25 11
Panama 2% 1% <1% 1% 1% <1% 2 1 0
Puerto Rico 59% 37% 16% 40% 24% 9% 73 38 14
Saba 38% 24% 10% 24% 15% 6% 39 23 9
Saint Kitts and Nevis 51% 32% 15% 34% 20% 9% 59 32 13
Saint Lucia 59% 17% 6% 40% 10% 3% 73 15 5
Saint Martin 41% 24% 13% 26% 15% 8% 43 23 11
Saint Vincent and the Grenadines 59% 15% 2% 41% 9% 1% 74 13 2
Sint Eustatius 38% 24% 13% 25% 15% 8% 40 23 11
Sint Maarten 41% 24% 13% 26% 15% 8% 43 23 11
Trinidad and Tobago 13% 4% <1% 8% 2% <1% 11 3 0
Turks and Caicos 59% 32% 18% 40% 20% 11% 73 32 16
UK Virgin Islands 57% 35% 17% 39% 22% 10% 69 35 15
US Virgin Islands 50% 31% 14% 33% 19% 8% 57 30 12