Pennsylvania, 1991

Tornadoes and Hail in Pennsylvania, April 9, 1991

April 9, 1991 · NWS PIT · 76 events in 34 counties and zones

58 thunderstorm wind, 11 tornado, 7 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
9
Property damage
$1.6 million
Crop damage
None recorded
Events
76

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Event by event

58 thunderstorm wind, 11 tornado, 7 hail. Local standard time, as filed.

Thunderstorm Wind, Northampton

When
April 9, 1:36 PM CST
Where
Northampton County
Measured
53 kt (61 mph)
Coordinates
40.650, -75.430

Thunderstorm Wind, Washington

When
April 9, 5:30 PM CST
Where
Washington County
Coordinates
40.400, -80.250

Hail, Beaver

When
April 9, 5:35 PM CST
Where
Beaver County
Measured
0.75 in hail
Coordinates
40.680, -80.500

Thunderstorm Wind, Allegheny

When
April 9, 5:39 PM CST
Where
Allegheny County
Coordinates
40.480, -80.230

Thunderstorm Wind, Beaver

When
April 9, 5:45 PM CST
Where
Beaver County
Coordinates
40.550, -80.330

Thunderstorm Wind, Erie

When
April 9, 5:50 PM CST
Where
Erie County
Coordinates
41.970, -80.150

Thunderstorm Wind, Crawford

When
April 9, 5:55 PM CST
Where
Crawford County
Coordinates
41.820, -80.380

Thunderstorm Wind, Washington

When
April 9, 6:00 PM CST
Where
Washington County
Coordinates
40.180, -79.980

Thunderstorm Wind, Lawrence

When
April 9, 6:00 PM CST
Where
Lawrence County
Coordinates
41.020, -80.450

Hail, Allegheny

When
April 9, 6:00 PM CST
Where
Allegheny County
Measured
0.75 in hail
Coordinates
40.520, -79.980

Thunderstorm Wind, Crawford

When
April 9, 6:05 PM CST
Where
Crawford County
Coordinates
41.750, -80.150

Thunderstorm Wind, Fayette

When
April 9, 6:07 PM CST
Where
Fayette County
Coordinates
40.020, -79.830

Thunderstorm Wind, Washington

When
April 9, 6:10 PM CST
Where
Washington County
Coordinates
40.220, -80.200

Thunderstorm Wind, Greene

When
April 9, 6:15 PM CST
Where
Greene County
Coordinates
39.770, -80.280

Thunderstorm Wind, Erie

When
April 9, 6:15 PM CST
Where
Erie County
Coordinates
41.950, -79.980

Hail, Butler

When
April 9, 6:18 PM CST
Where
Butler County
Measured
0.75 in hail
Coordinates
40.870, -79.920

Thunderstorm Wind, Erie

When
April 9, 6:20 PM CST
Where
Erie County
Coordinates
42.120, -80.080

Thunderstorm Wind, Fayette

When
April 9, 6:28 PM CST
Where
Fayette County
Coordinates
40.100, -79.600

Tornado, Westmoreland

When
April 9, 6:30 PM CST
Where
Westmoreland County
Rating
F1
Path length
0.2 mi
Path width
50 yd
Injuries
4 direct, 0 indirect
Property damage
$25,000
Coordinates
40.100, -79.600

Hail, Allegheny

When
April 9, 6:30 PM CST
Where
Allegheny County
Measured
1 in hail
Coordinates
40.430, -80.070

Hail, Butler

When
April 9, 6:30 PM CST
Where
Butler County
Measured
0.75 in hail
Coordinates
40.770, -80.070

Thunderstorm Wind, Fayette

When
April 9, 6:30 PM CST
Where
Fayette County
Coordinates
40.020, -79.900

Thunderstorm Wind, Greene

When
April 9, 6:30 PM CST
Where
Greene County
Coordinates
39.750, -80.000

Tornado, Bedford

When
April 9, 7:40 PM EST
Where
Bedford County
Rating
F1
Path length
0.5 mi
Path width
100 yd
Property damage
$25,000
Coordinates
40.170, -78.520

Tornado, Bedford

When
April 9, 7:40 PM EST
Where
Bedford County
Rating
F1
Path length
1 mi
Path width
100 yd
Property damage
$250,000
Coordinates
40.020, -78.500

Thunderstorm Wind, Westmoreland

When
April 9, 6:45 PM CST
Where
Westmoreland County
Coordinates
40.150, -79.550

Thunderstorm Wind, Indiana

When
April 9, 6:45 PM CST
Where
Indiana County
Coordinates
40.630, -79.130

Thunderstorm Wind, Somerset

When
April 9, 6:47 PM CST
Where
Somerset County
Coordinates
39.930, -79.250

Thunderstorm Wind, Fayette

When
April 9, 6:50 PM CST
Where
Fayette County
Coordinates
39.800, -79.580

Thunderstorm Wind, Somerset

When
April 9, 6:52 PM CST
Where
Somerset County
Coordinates
40.020, -79.080

Thunderstorm Wind, Somerset

When
April 9, 7:00 PM CST
Where
Somerset County
Coordinates
40.230, -78.980

Tornado, Cambria

When
April 9, 8:00 PM EST
Where
Cambria County
Rating
F1
Path length
1 mi
Path width
100 yd
Property damage
$250,000
Coordinates
40.620, -78.720

Thunderstorm Wind, Somerset

When
April 9, 7:05 PM CST
Where
Somerset County
Coordinates
39.750, -79.080

Thunderstorm Wind, Westmoreland

When
April 9, 7:08 PM CST
Where
Westmoreland County
Coordinates
40.250, -79.230

Thunderstorm Wind, Cambria

When
April 9, 7:10 PM CST
Where
Cambria County
Coordinates
40.620, -78.720

Thunderstorm Wind, Bedford

When
April 9, 7:10 PM CST
Where
Bedford County
Coordinates
40.020, -78.430

Tornado, Cambria

When
April 9, 7:18 PM CST
Where
Cambria County
Rating
F1
Path length
2 mi
Path width
100 yd
Property damage
$250,000
Coordinates
40.330, -78.920

Tornado, Fayette

When
April 9, 7:20 PM CST
Where
Fayette County
Rating
F1
Path length
0.5 mi
Path width
50 yd
Property damage
$250,000
Coordinates
39.950, -79.880

Thunderstorm Wind, Blair

When
April 9, 7:25 PM CST
Where
Blair County
Coordinates
40.370, -78.430

Tornado, Cambria

When
April 9, 7:30 PM CST
Where
Cambria County
Rating
F1
Path length
0.5 mi
Path width
50 yd
Property damage
$3,000
Coordinates
40.280, -78.850

Thunderstorm Wind, Clearfield

When
April 9, 7:30 PM CST
Where
Clearfield County
Coordinates
41.120, -78.770

Thunderstorm Wind, Fulton

When
April 9, 7:30 PM CST
Where
Fulton County
Injuries
1 direct, 0 indirect
Coordinates
39.850, -78.170

Thunderstorm Wind, Huntingdon

When
April 9, 7:30 PM CST
Where
Huntingdon County
Coordinates
40.130, -77.950

Thunderstorm Wind, Somerset

When
April 9, 7:30 PM CST
Where
Somerset County
Coordinates
39.950, -78.920

Thunderstorm Wind, Fulton

When
April 9, 7:30 PM CST
Where
Fulton County
Coordinates
40.050, -78.030

Thunderstorm Wind, Bedford

When
April 9, 7:30 PM CST
Where
Bedford County
Coordinates
40.020, -78.700

Thunderstorm Wind, Bedford

When
April 9, 7:35 PM CST
Where
Bedford County
Coordinates
39.820, -78.730

Thunderstorm Wind, Fulton

When
April 9, 7:45 PM CST
Where
Fulton County
Coordinates
39.930, -78.000

Tornado, Centre

When
April 9, 7:50 PM CST
Where
Centre County
Rating
F0
Path length
0.5 mi
Path width
60 yd
Property damage
$25,000
Coordinates
40.700, -77.970

Thunderstorm Wind, Clearfield

When
April 9, 7:54 PM CST
Where
Clearfield County
Coordinates
41.000, -78.450

Tornado, Bedford

When
April 9, 8:00 PM CST
Where
Bedford County
Rating
F1
Path length
0.5 mi
Path width
50 yd
Property damage
$25,000
Coordinates
40.220, -78.250

Thunderstorm Wind, Juniata

When
April 9, 8:00 PM CST
Where
Juniata County
Coordinates
40.400, -77.380

Thunderstorm Wind, Franklin

When
April 9, 8:03 PM CST
Where
Franklin County
Coordinates
39.930, -77.670

Thunderstorm Wind, Franklin

When
April 9, 8:03 PM CST
Where
Franklin County
Coordinates
39.820, -77.900

Thunderstorm Wind, Centre

When
April 9, 8:15 PM CST
Where
Centre County
Measured
52 kt (60 mph)
Coordinates
40.780, -77.850

Thunderstorm Wind, Jefferson

When
April 9, 8:20 PM CST
Where
Jefferson County
Coordinates
41.170, -79.080

Thunderstorm Wind, Adams

When
April 9, 8:28 PM CST
Where
Adams County
Coordinates
39.780, -77.370

Tornado, Cumberland

When
April 9, 8:30 PM CST
Where
Cumberland County
Rating
F0
Path length
3 mi
Path width
20 yd
Property damage
$250,000
Coordinates
40.220, -77.150

Tornado, Cumberland

When
April 9, 8:30 PM CST
Where
Cumberland County
Rating
F1
Path length
0.4 mi
Path width
20 yd
Injuries
3 direct, 0 indirect
Property damage
$250,000
Coordinates
40.250, -77.120

Thunderstorm Wind, Union

When
April 9, 8:30 PM CST
Where
Union County
Coordinates
40.950, -76.880

Thunderstorm Wind, Perry

When
April 9, 8:30 PM CST
Where
Perry County
Coordinates
40.470, -77.130

Thunderstorm Wind, Adams

When
April 9, 8:30 PM CST
Where
Adams County
Measured
61 kt (70 mph)
Coordinates
39.880, -76.980

Thunderstorm Wind, York

When
April 9, 8:40 PM CST
Where
York County
Coordinates
40.120, -77.030

Hail, Perry

When
April 9, 8:45 PM CST
Where
Perry County
Measured
1 in hail
Coordinates
40.350, -77.050

Thunderstorm Wind, Lancaster

When
April 9, 8:45 PM CST
Where
Lancaster County
Coordinates
40.150, -76.600

Thunderstorm Wind, Dauphin

When
April 9, 8:50 PM CST
Where
Dauphin County
Measured
50 kt (58 mph)
Coordinates
40.200, -76.720

Thunderstorm Wind, York

When
April 9, 9:00 PM CST
Where
York County
Coordinates
39.950, -76.720

Thunderstorm Wind, Dauphin

When
April 9, 9:00 PM CST
Where
Dauphin County
Coordinates
40.420, -77.020

Thunderstorm Wind, Lebanon

When
April 9, 9:00 PM CST
Where
Lebanon County
Injuries
1 direct, 0 indirect
Coordinates
40.330, -76.500

Hail, Northumberland

When
April 9, 9:03 PM CST
Where
Northumberland County
Measured
0.75 in hail
Coordinates
40.700, -76.830

Thunderstorm Wind, Centre

When
April 9, 9:05 PM CST
Where
Centre County
Coordinates
40.730, -77.930

Thunderstorm Wind, Dauphin

When
April 9, 9:05 PM CST
Where
Dauphin County
Coordinates
40.570, -76.680

Thunderstorm Wind, Schuylkill

When
April 9, 9:20 PM CST
Where
Schuylkill County
Coordinates
40.650, -76.530

Thunderstorm Wind, Berks

When
April 9, 9:45 PM CST
Where
Berks County
Measured
50 kt (58 mph)
Coordinates
40.380, -75.970

Thunderstorm Wind, Berks

When
April 9, 9:45 PM CST
Where
Berks County
Coordinates
40.480, -75.820

Thunderstorm Wind, Schuylkill

When
April 9, 9:50 PM CST
Where
Schuylkill County
Coordinates
40.670, -76.180

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 1991Every state in 1991This day in weather historyThe tornado archive for Pennsylvania, 1991Warnings in Pennsylvania, April 1991

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10118375, 10118376, 10118377, 10118378, 10118379, 10118380, 10118381, 10114158, 10114159, 10118382, 10114160, 10114161, 10114162, 10114163, 10114164, 10114165, 10114166, 10114167, 10114168, 10114169, 10114170, 10114171, 10114172, 10114194, 10114195, 10114173, 10114174, 10114175, 10114176, 10114177, 10114178, 10114199, 10114179, 10114180, 10114181, 10114182, 10114183, 10114184, 10114185, 10114186, and more.