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Louisiana winter weather risk

64 counties scored 0 rated Very High

Caddo Parish has the highest winter weather risk in Louisiana, scoring 89.9 out of 100 — rated "Relatively High" by FEMA's National Risk Index.

# County NRI score Rating NOAA events
2016–2026
1 Caddo Parish 89.9 Relatively High 0
2 Jefferson Parish 85.6 Relatively High 0
3 Orleans Parish 84.5 Relatively Moderate 0
4 St. Tammany Parish 79 Relatively Moderate 0
5 Rapides Parish 72.1 Relatively Moderate 0
6 East Baton Rouge Parish 67.6 Relatively Moderate 0
7 Webster Parish 57.7 Relatively Low 0
8 Terrebonne Parish 56.8 Relatively Low 0
9 Lafourche Parish 54.7 Relatively Low 0
10 Ouachita Parish 54 Relatively Low 0
11 Bossier Parish 51.4 Relatively Low 0
12 St. Landry Parish 50.3 Relatively Low 0
13 Natchitoches Parish 49.1 Relatively Low 0
14 Washington Parish 48.1 Relatively Low 0
15 Vernon Parish 47.9 Relatively Low 0
16 Iberia Parish 45.6 Relatively Low 0
17 Sabine Parish 44 Relatively Low 0
18 St. Martin Parish 44 Relatively Low 0
19 Lafayette Parish 42.7 Relatively Low 0
20 Beauregard Parish 39.9 Relatively Low 0
21 De Soto Parish 39.5 Relatively Low 0
22 St. Mary Parish 35.6 Relatively Low 0
23 Evangeline Parish 35.4 Relatively Low 0
24 Acadia Parish 35.2 Relatively Low 0
25 Calcasieu Parish 32 Relatively Low 0
26 St. Charles Parish 31 Relatively Low 0
27 Livingston Parish 30.4 Relatively Low 0
28 Tangipahoa Parish 29.1 Relatively Low 0
29 Ascension Parish 28.7 Relatively Low 0
30 St. John the Baptist Parish 28.7 Relatively Low 0
31 Avoyelles Parish 28.4 Relatively Low 0
32 Jackson Parish 25.7 Relatively Low 0
33 Bienville Parish 25.2 Relatively Low 0
34 Lincoln Parish 25.1 Relatively Low 0
35 St. Bernard Parish 24.7 Relatively Low 0
36 Allen Parish 24.2 Very Low 0
37 Jefferson Davis Parish 24.1 Very Low 0
38 Winn Parish 22.9 Very Low 0
39 Assumption Parish 20.6 Very Low 0
40 Grant Parish 19.4 Very Low 0
41 Plaquemines Parish 16.8 Very Low 0
42 Red River Parish 16.6 Very Low 0
43 Morehouse Parish 15.8 Very Low 0
44 Union Parish 14.5 Very Low 0
45 LaSalle Parish 12.4 Very Low 0
46 Iberville Parish 11.7 Very Low 0
47 Vermilion Parish 11.7 Very Low 0
48 Claiborne Parish 11.4 Very Low 0
49 Pointe Coupee Parish 10.8 Very Low 0
50 Concordia Parish 10.1 Very Low 0
51 East Feliciana Parish 10 Very Low 0
52 Richland Parish 9.5 Very Low 0
53 Franklin Parish 8 Very Low 0
54 Catahoula Parish 7.7 Very Low 0
55 St. James Parish 7.2 Very Low 0
56 West Baton Rouge Parish 6.4 Very Low 0
57 Madison Parish 5.7 Very Low 0
58 St. Helena Parish 5.6 Very Low 0
59 Caldwell Parish 5.3 Very Low 0
60 East Carroll Parish 5 Very Low 0
61 West Carroll Parish 4.9 Very Low 0
62 West Feliciana Parish 4.7 Very Low 0
63 Tensas Parish 4.3 Very Low 0
64 Cameron Parish 3.9 Very Low 0

Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.

Winter Weather risk nationally:

Top 50 US counties

Other hazard risks in Louisiana:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneHailStrong WindIce StormCold WaveLightningDroughtLandslideAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest winter weather risk county in Louisiana?

Caddo Parish, LA has the highest winter weather risk in Louisiana, with a FEMA National Risk Index score of 89.9 out of 100 (rated "Relatively High").

What causes winter weather risk in Louisiana?

Winter weather risk captures expected losses from heavy snow, blizzards, and mixed precipitation. Highest scores appear in the Great Lakes snowbelt, northern Rockies, and interior Northeast, where lake-effect and orographic snowfall is frequent. Winter weather impacts transportation networks, utilities, agriculture, and population health.