Norristown, PA
Local storm history & FEMA National Risk Index data
Norristown is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Montgomery County, PA. The county's highest-rated hazards are winter weather, strong wind, and cold wave.
Storm events near Norristown
NOAA-recorded tornado, hail, and flood events within 25 miles of Norristown's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Norristown itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Montgomery County's FEMA National Risk Index scores, covering Norristown along with the rest of the county, not a Norristown-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 37.3 | Very Low |
| Inland Flooding | 98.2 | Relatively High |
| Coastal Flooding | 0 | No Rating |
| Earthquake | 94.2 | Relatively Moderate |
| Heat Wave | 98.3 | Relatively High |
| Tornado | 95.6 | Relatively High |
| Avalanche | — | Not Applicable |
| Cold Wave | 98.4 | Relatively High |
| Drought | 61.4 | Relatively Low |
| Hail | 42.7 | Relatively Low |
| Hurricane | 89.9 | Relatively Moderate |
| Ice Storm | 81 | Relatively Moderate |
| Landslide | 68.3 | Relatively Low |
| Lightning | 76.7 | Relatively Moderate |
| Strong Wind | 99 | Very High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 99.8 | Very High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Montgomery County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Montgomery County:
More on Montgomery County:
Frequently asked questions
What natural hazards is Norristown, PA at risk of?
Norristown is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Montgomery County, where Norristown is located, are winter weather, strong wind, and cold wave.
What is Norristown's biggest natural hazard risk?
Winter Weather is the highest-rated hazard for Montgomery County, where Norristown is located, scoring 99.8 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Norristown a high-risk area for natural disasters?
Yes — Norristown carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Montgomery County.
Has Norristown had tornadoes, hail, or flooding?
NOAA has recorded 23 tornado, 180 hail, 593 inland flooding events within 25 miles of Norristown since 2016.