Storm risk in Cobb County, Georgia
FEMA rates Cobb County Relatively High for natural-hazard risk overall, 178th of 3,144 rated counties. For a roof the three that matter are hail (Relatively High), strong wind (Relatively Moderate) and tornado (Relatively High). NOAA logged 26 hail reports here from 2014 to June 2026.
FEMA National Risk Index, version December 2025, retrieved October 8, 2026. Planning-level county ratings.
Each dot is the county’s score from 0 to 100 against all rated U.S. counties; the bar colour is FEMA’s rating band.
Hazard by hazard
| Hazard | Rating | Score (0 to 100) | Rank in U.S. | Rank in GA | Expected yearly loss |
|---|---|---|---|---|---|
| Overall | Relatively High | 94.4 | 178 | 4 of 159 | $163,205,559buildings |
| Hail | Relatively High | 97.3 | 86 | 3 of 159 | $6,016,885buildings |
| Strong wind | Relatively Moderate | 83.6 | 516 | 7 of 159 | $802,431buildings |
| Tornado | Relatively High | 98.3 | 54 | 1 of 159 | $36,072,103all exposure |
Rank 1 is the highest score. Expected annual loss is a county total in dollars per year, not a figure per home; the overall, hail and wind rows count buildings only, the tornado row all exposure.
Cobb County in plain numbers
- FEMA's overall rating for Cobb County is Relatively High, score 94.4 of 100, 178th of 3,144 rated counties.
- Hail: Relatively High (score 97.3), 86th nationwide and 3rd of 159 counties in Georgia.
- Expected yearly hail loss to buildings: $6,016,885 for the whole county, about $35.00 per $1 million of building value.
- NRI's hail record averages 5.6 hail events a year in the county.
- Strong wind: Relatively Moderate (score 83.6), 516th nationwide; expected yearly loss to buildings $802,431, about $4.67 per $1 million of building value.
- Tornado: Relatively High (score 98.3), 54th nationwide; total expected yearly loss $36,072,103.
- Buildings in the county are valued at 171.9 billion dollars in the index; population 764,915.
- Social vulnerability is rated Very Low and community resilience Relatively Low.
- NOAA logged 26 hail reports in Cobb County from 2014 to June 2026; hail of 1 inch or more fell on 13 days and the largest stone was 1.75 inches.
- 2 of our cities are in the county: Marietta, Smyrna.
- 19 ZIP Code Tabulation Areas have more than half of their land area in Cobb County.
- Our guide range for a 2,000 sq ft asphalt roof in Marietta is $6,160 to $13,640.
- NOAA lists 5 tornado tracks in the county since 2014.
Where large hail was reported
FEMA scores the county as a whole. NOAA’s storm reports show where inside it the big stones fell.
Reported hail locations, Cobb County
- 211 to 1.74 in
- 11.75 to 2.74 in, golf ball to tennis ball
- 02.75 in and up, baseball
Largest plotted stone: 1.75 in. Bigger dots are bigger stones.
22 reports of 1 inch or larger have coordinates. Each dot is a reported location, not a storm path.
Sources: NOAA, Census county outlineCities and ZIP areas in Cobb County
2 cities in this county are on PickARoofer. ZIP Code Tabulation Areas are Census shapes that approximate ZIP codes; where we have a city’s ZIPs, the share is the part of each area’s land that lies in this county. 19 such areas have more than half their land here.
| City | ZIP areas (share of land in the county) | Pages |
|---|---|---|
| Marietta | 30062 (100%), 30064 (100%), 30066 (100%), 30144 (100%), 30087 (0%) | Roofers |
| Smyrna | 30082 (100%), 30078 (0%), 30149 (0%) | Roofers |
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How high is storm risk in Cobb County?
FEMA's National Risk Index rates Cobb County Relatively High overall. By peril: hail Relatively High, strong wind Relatively Moderate, tornado Relatively High. The highest-scoring of the three for this county is tornado (score 98.3).
How many hail reports has NOAA logged in Cobb County?
26 reports between 2014 and June 2026 in NOAA's Storm Events Database. A report is one entry for one storm in one county, so counts follow where people live as well as where hail fell.
What does expected annual loss mean?
It is FEMA's estimate of the average yearly loss from a hazard, in dollars, summed over the county. It is a county total, not a figure per home, and it is built for comparing counties, not for pricing one house.
Does a high rating mean my roof will be damaged?
No. The index compares counties at planning level. It cannot say what will happen on your street. After a storm, a roof inspection is the only way to know.
How does Cobb County compare with the rest of Georgia?
For hail it ranks 3rd of 159 rated counties in the state; for strong wind 7th of 159; for tornado 1st of 159.
Sources: FEMA National Risk Index, version December 2025, retrieved October 8, 2026; NOAA Storm Events Database; Census Bureau ZCTA-to-county relationship file (2020). This product uses the Federal Emergency Management Agency's National Risk Index dataset but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). Planning-level information, not an inspection and not insurance advice.