States › Pennsylvania › Montgomery County
Montgomery County, Pennsylvania
Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. NCEI storm records through 30 Jun 2026; OpenFEMA declarations refreshed 1 Oct 2026; NFIP claims as of 8 Sep 2026.
Montgomery County, Pennsylvania, has 1,603 weather events in the NCEI Storm Events record since 1950, most of them damaging wind.
That is 331.9 events per 100 square miles, above the Pennsylvania figure of 121.6, and 18.6 per 10,000 residents against 42.0 statewide.
49 events fall in the 12 months to 30 Jun 2026. NCEI attributes 66 deaths and 100 injuries to events in the county, with property damage estimated at $255M and crop damage at $2.0M.
FEMA has designated the county in 29 federal disaster declarations since 1953; the most recent is Remnants Of Hurricane Ida (major disaster, 10 Sep 2021).
National Flood Insurance Program policyholders in the county filed 6,200 claims since 1978, of which 5,081 were paid, totalling $185M (about $36K per paid claim). FEMA counts 2,284 residential flood policies in force.
FEMA's National Risk Index rates the county's overall risk as "Relatively High" and its expected annual loss as "Relatively High" ($297M a year across 18 hazards).
37 tropical storm or hurricane tracks in the HURDAT2 record passed within 100 miles of the county's centre at tropical-storm strength or more, 0 of them within 50 miles at hurricane strength.
Compared with Pennsylvania and the United States
| Measure | Montgomery County | Pennsylvania | US |
|---|---|---|---|
| Recorded events since 1950 | 1,603 | 54,427 | 1,977,440 |
| Events per 100 square miles | 331.9 | 121.6 | 56.0 |
| Events per 10,000 residents | 18.6 | 42.0 | 59.6 |
| Events in the last 12 months | 49 | 2,028 | 62,008 |
| Deaths recorded by NCEI | 66 | 901 | 26,435 |
| Property damage (NCEI estimates) | $255M | $5.3B | $575B |
| NFIP claims per 1,000 residents | 7.2 | 5.9 | 8.1 |
| Average paid NFIP claim | $36K | $23K | $43K |
| Claims per 100 policies in force, last 10 years | 49.5 | 25.9 | 16.1 |
County-recorded events plus zone-recorded events whose forecast zone is named for the county. State and US rows include events recorded only by forecast zone. Rates use 2021 Census population and land area.
Events by decade
Trend: 994 events in the 20 years to 2025 against 531 in the 20 years before. Reporting practice changed in 1996 and again with automated reports in the 2000s, so decade totals measure the record as much as the weather.
Events by type
Hazard pages exist for hail, tornado, flood, wind and winter where the county has at least 10 recorded events. "Other" covers heavy rain, debris flow, dust, funnel clouds and similar reports.
Largest recorded events
| Date | Event type | Group | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|---|
| 27 Jul 1994 | Tornado | Tornado | F3 | $50M | — | 3 | 25 | County |
| 16 Sep 1999 | Flash Flood | Flood | — | $12M | — | 3 | 8 | County |
| 19 Jan 1996 | Flood | Flood | — | $3.2M | — | 3 | — | Forecast zone |
| 21 Jul 1998 | Heat | Heat | — | — | — | 3 | — | Forecast zone |
| 1 Aug 2002 | Heat | Heat | — | — | — | 3 | — | Forecast zone |
| 5 Jul 2010 | Excessive Heat | Heat | — | — | — | 3 | — | Forecast zone |
| 1 Sep 2021 | Flash Flood | Flood | — | $20M | $1.0M | 2 | — | County |
| 8 Sep 1996 | Flash Flood | Flood | — | $20M | — | 2 | — | County |
| 7 Jun 1999 | Heat | Heat | — | — | — | 2 | 1 | Forecast zone |
| 6 Aug 2001 | Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 28 Jul 2002 | Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 25 Jul 2005 | Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 1 Aug 2006 | Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 21 Jul 2011 | Excessive Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 1 Jul 2012 | Heat | Heat | — | — | — | 2 | — | Forecast zone |
| 4 Jul 1999 | Heat | Heat | — | — | — | 1 | 5 | Forecast zone |
| 12 Feb 2008 | Winter Storm | Winter | — | — | — | 1 | 4 | Forecast zone |
| 16 Jun 2001 | Flash Flood | Flood | — | $34M | — | 1 | — | County |
| 1 Sep 2021 | Tornado | Tornado | EF2 | $5.0M | — | 1 | 2 | County |
| 29 Oct 2012 | High Wind | Wind | 59 mph | $3.0M | — | 1 | — | Forecast zone |
Ranked by deaths, then injuries, then NCEI's damage estimate. Deaths and injuries are NCEI counts (direct plus indirect); no personal details are recorded here.
Federal disaster declarations
| Declared | Number | Type | Incident | Title | Programs |
|---|---|---|---|---|---|
| 10 Sep 2021 | DR-4618 | Major disaster | Hurricane | Remnants Of Hurricane Ida | Individual assistance, Public assistance |
| 30 Mar 2020 | DR-4506 | Major disaster | Biological | Covid-19 Pandemic | Individual assistance, Public assistance |
| 13 Mar 2020 | EM-3441 | Emergency | Biological | Covid-19 | Public assistance |
| 23 Mar 2016 | DR-4267 | Major disaster | Snowstorm | Severe Winter Storm And Snowstorm | Public assistance |
| 6 Feb 2014 | EM-3367 | Emergency | Severe Ice Storm | Severe Winter Storm | Public assistance |
| 10 Jan 2013 | DR-4099 | Major disaster | Hurricane | Hurricane Sandy | Public assistance |
| 29 Oct 2012 | EM-3356 | Emergency | Hurricane | Hurricane Sandy | Public assistance |
| 12 Sep 2011 | DR-4030 | Major disaster | Flood | Tropical Storm Lee | Individual assistance, Public assistance |
| 8 Sep 2011 | EM-3340 | Emergency | Flood | Remnants Of Tropical Storm Lee | Public assistance |
| 3 Sep 2011 | DR-4025 | Major disaster | Hurricane | Hurricane Irene | Individual assistance, Public assistance |
| 29 Aug 2011 | EM-3339 | Emergency | Hurricane | Hurricane Irene | Public assistance |
| 16 Apr 2010 | DR-1898 | Major disaster | Snowstorm | Severe Winter Storms And Snowstorms | Public assistance |
| 30 Jun 2006 | DR-1649 | Major disaster | Severe Storm | Severe Storms, Flooding, And Mudslides | Individual assistance |
| 10 Sep 2005 | EM-3235 | Emergency | Hurricane | Hurricane Katrina | Public assistance |
| 19 Sep 2004 | DR-1557 | Major disaster | Hurricane | Tropical Depression Ivan | Individual assistance |
| 19 Sep 2004 | DR-1555 | Major disaster | Severe Storm | Severe Storms And Flooding Associated With Tropical Depression Frances | — |
| 6 Aug 2004 | DR-1538 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance |
| 14 Mar 2003 | EM-3180 | Emergency | Severe Storm | Snow | Public assistance |
| 21 Jun 2001 | DR-1383 | Major disaster | Severe Storm | Tropical Storm Allison | Individual assistance, Public assistance |
| 18 Sep 1999 | DR-1294 | Major disaster | Hurricane | Hurricane Floyd Major Disaster Declarations | Individual assistance, Public assistance |
| 13 Sep 1996 | DR-1138 | Major disaster | Flood | Flooding Associated With Tropical Depression Fran | Individual assistance, Public assistance |
| 21 Jan 1996 | DR-1093 | Major disaster | Flood | Severe Storms And Flooding | Individual assistance |
| 13 Jan 1996 | DR-1085 | Major disaster | Snowstorm | Blizzard Of 96 | Public assistance |
| 10 Mar 1994 | DR-1015 | Major disaster | Severe Storm | Severe Winter Storms | Public assistance |
| 16 Mar 1993 | EM-3105 | Emergency | Snowstorm | Severe Snowfall & Winter Storm | Public assistance |
| 17 Jul 1973 | DR-400 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 23 Jun 1972 | DR-340 | Major disaster | Flood | Tropical Storm Agnes | Individual assistance, Public assistance |
| 18 Sep 1971 | DR-312 | Major disaster | Flood | Floods | Individual assistance, Public assistance |
| 18 Aug 1965 | DR-206 | Major disaster | Drought | Water Shortage | Individual assistance, Public assistance |
Declarations in which FEMA designated this county, from the OpenFEMA Disaster Declarations Summaries (v2). DR: major disaster; EM: emergency; FM: fire management assistance. Programs show whether individual or public assistance was made available.
Flood insurance claims
| Year of loss | Claims | Paid claims | Amount paid | Average paid |
|---|---|---|---|---|
| 2026 | 13 | 3 | $38,978 | $12,993 |
| 2025 | 4 | 2 | $97,985 | $48,992 |
| 2024 | 18 | 13 | $194,668 | $14,974 |
| 2023 | 27 | 16 | $346,978 | $21,686 |
| 2022 | 6 | 2 | $16,923 | $8,462 |
| 2021 | 634 | 564 | $52,551,392 | $93,176 |
| 2020 | 258 | 226 | $9,794,539 | $43,339 |
| 2019 | 93 | 72 | $2,766,433 | $38,423 |
| 2018 | 66 | 44 | $2,060,765 | $46,836 |
| 2017 | 11 | 2 | $25,819 | $12,909 |
| 2016 | 7 | 4 | $8,343 | $2,086 |
| 2015 | 12 | 6 | $334,524 | $55,754 |
| 2014 | 169 | 138 | $3,444,669 | $24,961 |
| 2013 | 17 | 12 | $146,782 | $12,232 |
| 2012 | 25 | 10 | $64,739 | $6,474 |
| 2011 | 811 | 668 | $25,392,363 | $38,013 |
| 2010 | 150 | 122 | $2,210,266 | $18,117 |
| 2009 | 232 | 203 | $6,462,870 | $31,837 |
| 2008 | 11 | 8 | $40,297 | $5,037 |
| 2007 | 58 | 43 | $646,769 | $15,041 |
| 2006 | 243 | 216 | $6,296,703 | $29,151 |
| 2005 | 132 | 106 | $2,062,902 | $19,461 |
| 2004 | 335 | 268 | $6,969,613 | $26,006 |
| 2003 | 73 | 53 | $435,116 | $8,210 |
| 2002 | 8 | 4 | $6,840 | $1,710 |
OpenFEMA NFIP claims (v3, as of 8 Sep 2026), aggregated by year of loss; amounts are building, contents and increased-cost-of-compliance payments as recorded. Repetitive-loss counts from the NFIP Multiple Loss Properties file (2 Aug 2026); policies in force from the NFIP Residential Penetration Rates file (3 Aug 2026).
National Risk Index
| Hazard (NRI) | Risk rating | Expected annual loss |
|---|---|---|
| Inland flooding | $192,585,796 | |
| Cold wave | $29,892,706 | |
| Heat wave | $20,291,085 | |
| Tornado | $15,464,912 | |
| Earthquake | $14,452,215 | |
| Strong wind | $9,616,153 | |
| Hurricane | $8,942,212 | |
| Winter weather | $3,487,982 | |
| Lightning | $756,056 | |
| Ice storm | $529,818 | |
| Drought | $366,932 | |
| Hail | $234,147 | |
| Wildfire | $25,891 | |
| Landslide | $5,914 |
FEMA National Risk Index, December 2025 release. Ratings are FEMA's relative comparison of counties; expected annual loss is FEMA's modelled estimate of average yearly building, population and agriculture loss. See how to read the NRI.
Hurricane and tropical storm passes
| Storm | Year | Closest approach | Max wind while within 100 mi |
|---|---|---|---|
| Ida | 2021 | 31 mi | 40 mph |
| Fay | 2020 | 56 mi | 52 mph |
| Isaias | 2020 | 50 mi | 63 mph |
| Andrea | 2013 | 96 mi | 46 mph |
| Sandy | 2012 | 49 mi | 81 mph |
| Irene | 2011 | 67 mi | 69 mph |
| Hanna | 2008 | 48 mi | 52 mph |
| Ernesto | 2006 | 74 mi | 40 mph |
| Bertha | 1996 | 46 mi | 69 mph |
| Danielle | 1992 | 51 mi | 40 mph |
| Brenda | 1960 | 85 mi | 58 mph |
| Diane | 1955 | 17 mi | 46 mph |
| Hazel | 1954 | 97 mi | 81 mph |
| Able | 1952 | 45 mi | 58 mph |
| Unnamed Atlantic storm | 1949 | 76 mi | 58 mph |
| Unnamed Atlantic storm | 1944 | 84 mi | 40 mph |
| Unnamed Atlantic storm | 1943 | 90 mi | 40 mph |
| Unnamed Atlantic storm | 1934 | 28 mi | 46 mph |
| Unnamed Atlantic storm | 1933 | 90 mi | 52 mph |
| Unnamed Atlantic storm | 1929 | 54 mi | 58 mph |
| Unnamed Atlantic storm | 1916 | 96 mi | 52 mph |
| Unnamed Atlantic storm | 1915 | 24 mi | 58 mph |
| Unnamed Atlantic storm | 1904 | 79 mi | 75 mph |
| Unnamed Atlantic storm | 1903 | 20 mi | 81 mph |
| Unnamed Atlantic storm | 1900 | 88 mi | 40 mph |
HURDAT2 best-track positions at tropical-storm strength (34 kt) or more, measured from the county's Census centre point; through the 2025 season. Distance from a track is not the same as the extent of the storm's wind, rain or surge.
ZIP codes with flood claims
- 19403 812
- 19002 389
- 19040 356
- 19460 346
- 19426 330
- 19006 298
- 19034 285
- 19464 265
- 19428 237
- 19473 193
- 19401 187
- 19405 187
- 19038 183
- 19001 174
- 19027 174
- 19453 160
- 19046 144
- 19031 125
- 19035 111
- 19096 111
- 19095 88
- 19406 82
- 19440 78
- 19010 74
- 19044 73
- 19090 49
- 19438 47
- 19525 47
- 18915 46
- 19075 46
- 19420 41
- 19446 41
- 19072 40
- 18054 39
- 18074 37
- 19444 35
- 19456 35
- 19462 32
- 18084 27
- 19012 27
- 19468 27
- 19004 26
- 19454 25
- 19422 24
- 19025 22
- 19478 20
- 19066 16
- 19474 14
- 19041 13
- 18073 12
- 19117 10
- 19477 10
- 19009 9
- 19437 6
ZIP codes whose NFIP claims carry this county's code, with the number of claims. Five or more claims are needed for a ZIP page to be indexed.
Questions and answers
How often does it hail in Montgomery County, PA?
NCEI records 132 hail events in Montgomery County since 1950, in 37 different years; that is about 1.7 recorded events a year. 10 reports were golf-ball size (1.75 in) or larger.
Has Montgomery County had a tornado?
Yes. NCEI records 19 tornadoes in Montgomery County since 1950, 5 of them rated (E)F2 or stronger. Tornado deaths recorded: 4.
When was the last federal disaster declaration for Montgomery County?
10 Sep 2021: Remnants Of Hurricane Ida, a major disaster declaration for hurricane. The county appears in 29 declarations since 1953.
How many flood insurance claims have been filed in Montgomery County, and how much was paid?
6,200 NFIP claims since 1978, 5,081 of them paid, for $185M in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is Montgomery County in the National Risk Index's high-risk band?
FEMA's National Risk Index (December 2025) rates the county "Relatively High" for overall risk, "Relatively High" for expected annual loss, "Very Low" for social vulnerability and "Very High" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does Montgomery County compare with the rest of Pennsylvania?
331.9 recorded events per 100 square miles against 121.6 statewide, and 7.2 NFIP claims per 1,000 residents against 5.9. The comparison table on this page shows each measure beside the state and national figures.
Provenance
Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026 (public domain). Declarations: OpenFEMA DisasterDeclarationsSummaries v2, refreshed 1 Oct 2026. Flood claims: OpenFEMA NfipClaims v3 as of 8 Sep 2026; NfipMultipleLossProperties v1 (2 Aug 2026); NfipResidentialPenetrationRates v1 (3 Aug 2026). Risk index: FEMA National Risk Index, December 2025. Hurricane tracks: NHC HURDAT2 through 2025. Population and area: US Census Bureau, 2021 vintage. Built 1 Oct 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.