Pennsylvania Storm History: Every Flood, Storm and Heat Wave Since 1950

The worst in Pennsylvania on the map

The deadliest and costliest episodes on record here, colored by kind of event.

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

The record

Events: 54,502
Deaths: 901
Injuries: 3,825
Damage: $5.9 billion

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.

Every year

Tap a year for every episode in it.

From 1996 the record holds 48 kinds of event with each office’s narrative; before that, tornadoes, hail and thunderstorm wind only, and before 1955 tornadoes alone.

Deaths each year

By kind of event

Kind of event	Events	Deaths	Injuries	Damage
Thunderstorm Wind	23,711	51	501	$293 million
Hail	5,524	0	1	$12 million
Flash Flood	4,743	77	59	$2.0 billion
Winter Weather	3,470	56	671	$2.6 million
Heavy Snow	2,452	15	113	$32 million
Winter Storm	2,447	44	217	$80 million
Flood	2,203	33	107	$841 million
High Wind	1,628	26	43	$109 million
Strong Wind	1,259	14	22	$8.4 million
Tornado	1,091	83	1,309	$1.9 billion
Drought	807	0	0	$521 million
Heat	700	318	344
Ice Storm	568	0	66	$1.4 million
Heavy Rain	567	2	4	$2,000
Extreme Cold/Wind Chill	561	6	0	$960,000
Lightning	554	27	230	$18 million
Cold/Wind Chill	495	30	1	$51 million
Dense Fog	466	0	14
Excessive Heat	349	102	105	$35,000
Lake-Effect Snow	255	0	3	$47 million
Funnel Cloud	119	0	0
Coastal Flood	107	0	0	$300,000
Wildfire	85	1	13	$5.3 million
Blizzard	59	15	0	$20 million
Astronomical Low Tide	58	0	0
Tropical Storm	55	1	0	$3.7 million
Sleet	48	0	0
Storm Surge/Tide	39	0	1	$120,000
Frost/Freeze	34	0	0	$56 million
Freezing Fog	17	0	0
Waterspout	16	0	0
Debris Flow	8	0	0	$80,000
Lakeshore Flood	4	0	0	$8.4 million
Dust Devil	2	0	1
Marine High Wind	1	0	0

The deadliest

The costliest

Counties

Every storm event filed in each county, including the zone-filed ones that covered it.

Counties and zones as filed

The places filed most often, as the offices named them.

County or zone	Events	Deaths	Injuries	Damage
Allegheny	2,372	10	224	$424 million
Westmoreland	1,736	8	78	$295 million
Berks	1,377	3	30	$58 million
Chester	1,298	12	55	$80 million
Montgomery	1,135	20	63	$232 million
Washington	1,036	1	9	$20 million
Lancaster	1,000	10	55	$43 million
York	935	7	59	$34 million
Butler	929	7	91	$57 million
Bucks	923	13	76	$145 million
Beaver	843	5	49	$62 million
Mercer	812	9	95	$38 million
Fayette	810	1	25	$27 million
Crawford	803	14	105	$370 million
Monroe zone	800	7	51	$88 million
Carbon zone	774	9	28	$12 million
Philadelphia zone	734	384	404	$15 million
Erie	717	15	155	$76 million
Northampton	701	2	19	$98 million
Lehigh	697	1	10	$73 million
Delaware	687	4	42	$78 million
Delaware zone	680	21	67	$13 million
Philadelphia	663	8	59	$137 million
Northampton zone	658	8	52	$51 million
Lehigh zone	645	27	67	$11 million
Berks zone	644	15	165	$24 million
Lycoming	642	10	26	$71 million
Indiana	628	1	6	$9.9 million
Bradford	622	3	22	$125 million
Venango	613	9	62	$106 million
Luzerne	603	5	63	$305 million
Lawrence	602	0	14	$8.7 million
Jefferson	598	1	8	$111 million
Centre	573	2	6	$36 million
Dauphin	564	6	25	$161 million
Monroe	531	5	27	$29 million
Susquehanna	518	2	0	$129 million
Armstrong	510	1	128	$260 million
Clearfield	501	0	0	$38 million
Bucks zone	495	15	45	$88 million
Cambria	483	2	13	$4.7 million
Franklin	480	0	5	$3.4 million
Montgomery zone	468	46	37	$24 million
Clarion	456	2	26	$78 million
Chester zone	455	12	27	$33 million
Lackawanna	447	3	14	$117 million
Lebanon	436	3	33	$28 million
Cumberland	434	3	11	$3.5 million
Somerset	433	4	27	$6.5 million
Warren	414	2	14	$4.3 million
Adams	398	3	0	$12 million
Schuylkill	372	2	6	$8.1 million
Greene	369	1	3	$5.7 million
Clinton	357	3	3	$54 million
McKean	356	5	41	$73 million
Carbon	341	3	34	$3.3 million
Tioga	341	0	15	$7.3 million
Huntingdon	338	2	40	$1.8 million
Northumberland	335	2	26	$27 million
Columbia	321	0	11	$18 million
Wayne	312	2	3	$97 million
Blair	310	1	0	$3.6 million
Southern Erie zone	299	1	6	$41 million
Perry	294	1	2	$1.2 million
Bedford	275	2	3	$1.7 million
Potter	252	1	7	$1.7 million
Crawford zone	250	1	5	$27 million
Northern Erie zone	248	0	8	$68 million
Elk	241	0	36	$5.8 million
Pike	225	0	2	$48 million
Allegheny zone	222	4	137	$31 million
Somerset zone	219	3	1	$476,000
Lower Bucks zone	218	5	57	$30,000
Western Chester zone	207	0	16	$21,000
Wyoming	206	2	16	$149 million
Westmoreland zone	206	1	0	$12 million
Mifflin	203	1	4	$1.4 million
Cambria zone	200	2	6	$266,000
Upper Bucks zone	199	2	0	$17,000
Snyder	198	1	8	$1.4 million
Venango zone	192	4	6	$1.6 million
Eastern Montgomery zone	189	6	40	$51,000
Union	187	3	22	$52 million
Fayette zone	185	1	1	$7.8 million
Western Montgomery zone	181	2	3	$40,000
Sullivan	178	1	2	$12 million
Lancaster zone	177	4	8	$1.2 million
Jefferson zone	177	0	20	$1.5 million
Eastern Chester zone	173	0	22	$84,000
Forest	169	8	38	$26 million
York zone	167	4	2	$25 million
Clearfield zone	167	0	20	$142,000
Warren zone	161	1	2	$50 million
McKean zone	159	0	0	$41,000
Cumberland zone	158	5	15	$2.2 million
Tioga zone	158	0	5	$65,000
Butler zone	157	2	2	$8.7 million
Juniata	156	4	0	$1.4 million
Clarion zone	154	2	10	$3.9 million
Sullivan zone	151	0	1	$82,000
Blair zone	148	3	4	$2.3 million
Mercer zone	148	0	124	$2.4 million
Schuylkill zone	147	9	26	$112,000
Forest zone	147	0	0	$385,000
Northern Centre zone	146	0	0	$1.1 million
Potter zone	146	0	2	$500 million
Lebanon zone	145	5	71	$92,000
Dauphin zone	142	2	1	$226,000
Washington zone	140	0	7	$9.7 million
Southern Centre zone	139	2	0	$162,000
Susquehanna zone	137	2	1	$9.7 million
Bedford zone	135	1	3	$232,000
Lackawanna zone	135	0	1	$11 million
Luzerne zone	135	2	47	$16 million
Beaver zone	135	2	2	$27 million
Northern Lycoming zone	134	0	0	$68,000
Bradford zone	134	0	0	$32 million
Fulton	132	1	1	$287,000
Southern Lycoming zone	132	1	0	$162,000
Pike zone	131	0	1	$17 million
Adams zone	130	0	1	$70,000
Armstrong zone	129	0	1	$8.6 million
Indiana zone	129	0	0	$2.2 million
Northern Clinton zone	127	0	3	$40,000
Southern Clinton zone	123	6	17	$1.6 million
Huntingdon zone	120	0	0	$77,000
Franklin zone	117	1	0	$132,000
Wyoming zone	115	1	1	$12 million
Northumberland zone	114	0	0	$43,000
Columbia zone	114	0	1	$99,000
Montour	113	0	5	$1.4 million
Perry zone	113	4	0	$77,000
Lawrence zone	112	0	2	$1.6 million
Elk zone	111	0	1	$29,000
Cameron zone	111	0	0	$24,000
Union zone	109	0	0	$32,000
Mifflin zone	106	1	2	$95,000
Fayette Ridges zone	105	0	1	$345,000
Fulton zone	104	0	2	$64,000
Snyder zone	104	0	0	$18,000
Cameron	99	0	0	$432,000
Juniata zone	98	0	8	$97,000
Montour zone	97	2	2	$19,000
Westmoreland Ridges zone	97	0	0	$466,000
Greene zone	96	0	0	$6.8 million
Northern Wayne zone	87	0	0	$6.5 million
Southern Wayne zone	75	0	0	$6.2 million
Wayne zone	57	0	0	$1.8 million
	29	0	0
Indiana County zone	26	0	0	$350,000

Every year

More

Every tornado in Pennsylvania Every warning in Pennsylvania since 1986 River gauges in Pennsylvania Every state

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.