County Hazards

Storm events on record through

Pennsylvania in 1991 Storm events, disaster declarations and flood insurance claims of the year

NCEI has 457 storm events on record for Pennsylvania in 1991.

FEMA has no disaster declaration for the state with a date in 1991.

OpenFEMA has 176 NFIP claims with a 1991 year of loss. The NFIP paid $1,402,197 on these claims.

NCEI recorded tornado events from 1950, and hail and thunderstorm wind events from 1955. It recorded all event types from 1996.

The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.

The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.

The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .

This is raw, unedited data from FEMA's National Emergency Management Information System (NEMIS) and as such is subject to a small percentage of human error.

The words of the agency. Source: FEMA, OpenFEMA Dataset "Disaster Declarations Summaries - v2", copied on . The page gives: last data refresh 2026-10-01.

It is derived from the National Flood Insurance Program system of record, staged in the program's reporting platform and redacted to protect policy holder personally identifiable information.

The words of the agency. Source: FEMA, OpenFEMA Dataset "NFIP Redacted Claims - v3", copied on . The page gives: last data refresh 2026-09-09.

Dates of the data: NCEI storm events through . OpenFEMA disaster declarations through . NFIP claims through .

Storm events of 1991 by hazard

Storm events on record for Pennsylvania in 1991, by hazard (NCEI)
HazardStorm events in 1991
Hail54
Tornado22
Wind381
All storm events457

The counts have the events that NCEI records for a forecast zone.

Counties with a storm event in 1991

Counties of Pennsylvania with a storm event on record in 1991, in name order
CountyStorm events in 1991
Adams County7
Allegheny County15
Armstrong County5
Beaver County9
Bedford County15
Berks County10
Blair County8
Bradford County2
Bucks County2
Butler County14
Cambria County17
Cameron County2
Carbon County2
Centre County11
Chester County14
Clarion County7
Clearfield County8
Clinton County9
Columbia County5
Crawford County20
Cumberland County4
Dauphin County6
Delaware County8
Elk County2
Erie County21
Fayette County9
Forest County3
Franklin County12
Fulton County4
Greene County3
Huntingdon County10
Indiana County11
Jefferson County6
Juniata County2
Lackawanna County1
Lancaster County9
Lawrence County6
Lebanon County10
Lehigh County3
Luzerne County3
Lycoming County13
McKean County10
Mercer County7
Mifflin County2
Montgomery County10
Northampton County4
Northumberland County8
Perry County6
Philadelphia County6
Potter County3
Schuylkill County6
Snyder County1
Somerset County9
Susquehanna County2
Tioga County2
Union County5
Venango County7
Warren County4
Washington County11
Wayne County3
Westmoreland County14
York County9

Events of 1991 with a tornado rating, damage, injuries or deaths

Storm events of 1991 in Pennsylvania with a tornado rating, a damage estimate of $50,000 or more, an injury or a death in the NCEI record, in date order (40 events at most)
DateCountyEvent typeMagnitudeDamage estimateDeathsInjuriesOn record for
WestmorelandTornadoF1$25 thousand04County
CumberlandTornadoF1$250 thousand03County
FultonThunderstorm Wind0 mphnone01County
LebanonThunderstorm Wind0 mphnone01County
CambriaTornadoF1$250 thousand00County
FayetteTornadoF1$250 thousand00County
BedfordTornadoF1$250 thousand00County
CambriaTornadoF1$250 thousand00County
CumberlandTornadoF0$250 thousand00County
BedfordTornadoF1$25 thousand00County
CentreTornadoF0$25 thousand00County
BedfordTornadoF1$25 thousand00County
CambriaTornadoF1$3 thousand00County
NorthamptonThunderstorm Wind0 mphnone10County
LancasterTornadoF2$250 thousand03County
WestmorelandThunderstorm Wind0 mphnone01County
SchuylkillThunderstorm Wind0 mphnone01County
YorkTornadoF0$3 thousand00County
LebanonTornadoF0$3 thousand00County
MontgomeryThunderstorm Wind0 mphnone03County
DelawareThunderstorm Wind0 mphnone01County
ChesterThunderstorm Wind75 mphnone01County
LancasterThunderstorm Wind0 mphnone01County
PhiladelphiaThunderstorm Wind0 mphnone012County
LebanonThunderstorm Wind0 mphnone03County
LawrenceTornadoF0$250 thousand00County
LackawannaTornadoF1$3 thousand00County
ButlerTornadoF0$25000County
MontgomeryTornadoF1$2.5 million00County
PhiladelphiaTornadoF1$2.5 million00County
HuntingdonTornadoF2$250 thousand03County
SusquehannaTornadoF2$25 thousand00County
WayneTornadoF2$25 thousand00County

A damage figure is an estimate in the NCEI record. Deaths and injuries are the direct and indirect counts of NCEI.

FEMA disaster declarations in 1991

FEMA has no disaster declaration for Pennsylvania with a date in 1991.

NCEI storm events through 30 Jun 2026. OpenFEMA disaster declarations through 1 Oct 2026. NFIP claims through 8 Sep 2026. All years of Pennsylvania