Warren County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Warren County: 0.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Mapped landslides

Mapped by USGS Conterminous (3).

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

More event types since 1996

Costliest events since 1996

1. Sep 17, 2004Flood, Warren$50.0 million
   National Weather Service narrative

   The remnants of Hurricane Ivan moved north along the Appalachians during Friday, September 17th, and interacted with an approaching cold front, leading to a large swath of excessive rainfall across central Pennsylvania as the system weakened to a tropical depression. The rain began during Friday morning, and then became very heavy from Friday afternoon into Friday evening. Rainfall amounts of 3 to 6 inches were common, with some localized amounts exceeding 8 inches within a 12 hour period. The heavy rainfall finally tapered off from west to east across central Pennsylvania late Friday night.As a result of this excessive rainfall, and antecedent heavy rainfall from the remnants of…

2. Apr 14, 2019Tornado$1.0 million
   National Weather Service narrative

   A National Weather Service storm survey has confirmed an EF-2 tornado near Starbrick in Warren County Pennsylvania on April 14, 2019.||The tornado initially touched down on Thompsons Island, about 4 miles southwest of Starbrick and strengthened as it tracked northeast through Starbrick. The tornado reached peak intensity and produced the most significant damage (and strongest winds) in Starbrick. The Carter Lumber company sustained extensive damage along with several other nearby buildings.||The tornado continued northeast with fluctuating intensity through North Warren (Conewango Township) resulting in downed trees and damage to residential homes. Damage continued northeast…

3. Jul 4, 2019Flash Flood$1.0 million
   National Weather Service narrative

   State Route 62 Flooded North of Tidioute.

4. Jul 21, 2003Flash Flood$500,000
   National Weather Service narrative

   Heavy rains caused flash flooding in Warren County. An initial batch of rain began across the county during the mid afternoon. Later in the evening, another batch of heavy rain caused rapid flooding across the county. Most of the damage was in the towns of Tidioute and Tiona. Over 200 homes sustained water damage, with several sustaining damage to the foundation. Four personal bridges were destroyed. Water rose quickly along Tidioute Creek and McGuire Run, forcing the evacuation of 20 people.

5. Jul 9, 1999Tornado$150,000
   National Weather Service narrative

   A small tornado touched down on State Route 3005 just across the Allegheny River south of Tidioute. The storm tracked east paralleling the road for about three miles crossing Red House Hill Road near McKean Corners. Damage was mostly to trees with one home having a chimney damaged. A broad area of downburst damage associated with the storm extended south from Red House Hill Road all the way to the Pennsylvania border along Route 3005 (Kelly Hill Road). Hundreds of trees were down, power poles were snapped off, and many hunting and recreational cabins in the area had some structural damage due to falling trees. This was a low F1 event with winds probably best estimated on the order…

6. Jul 9, 1999Thunderstorm Wind$150,000
   National Weather Service narrative

   Downburst winds blew down dozens of trees. A tree fell on a car on route 27 just south of Garland, fatally injuring the 21 year old female driver, critically injuring the second female passenger, and seriously injuring the third. Close by another tree fell and completely smashed an unoccupied auto. Just to the east of Garland, a barn was partially unroofed and a silo was damaged.

7. Jul 21, 2003Thunderstorm Wind$100,000
   National Weather Service narrative

   Thunderstorms downed over 600 trees in the town of Cherry Grove. Sporadic tree damage occurred for about 5 miles to the east of Cherry Grove, to the town of Sheffield, where the same strong thunderstorm winds caused structural damage to a nursing home, the Ruth M. Smith Center. This forced the evacuation of the nursing home residents. A disaster declaration was made for Warren County.On August 6th, Governor Edward G. Rendell signed a Proclamation of Disaster Emergency to support recovery efforts in several northwestern Pennsylvania counties including Warren. Also, a request was made for a Presidential Declaration for a Major Disaster for the Commonwealth of Pennsylvania,…

8. Sep 29, 1999High Wind, Warren$100,000
   National Weather Service narrative

   A fast moving cold frong raced east across the area taking down trees, blocking roads, and interrupting power in many locations. Much of the damage was related to strong winds with the front, although in several locations thunder was also heard. In Cambria County, a tree was down on a police car in Belsamo. An entire stand of trees were cleared south of Lewistown. A tree was down on a car in Sunbury. A couple in Springettsburg Township near York thought a tornado had crossed their backyard when all of the trees were blown down. Many counties reported damage to trees in many locations, and highway crews were out overnight removing trees and debris in each of the counties.

9. May 21, 2004Flash Flood$100,000
   National Weather Service narrative

   Thunderstorms with heavy rain caused Flash Flooding in Warren county during the early morning hours of May 21. Hard hit were the towns of Chandlers Valley and Sugar Grove. In Sugar Grove, a business was flooded, ruining most of the inventory. Numerous water rescues were performed, and several vehicles were washed off Route 957. A community church was flooded in Chandlers Valley. A total of four families (9 people) were rescued by boat in the county. The Red Cross was activated and supplied food and blankets. Jones Hill road required a bridge replacement. Route 957 was closed to remove debris and washouts.

10. Jun 5, 2016Tornado$100,000
    National Weather Service narrative

    The National Weather Service in State College PA has confirmed a tornado near North Warren in Warren County Pennsylvania on June 5, 2016.||The tornado developed in woods west of Route 62 before coming down a hillside into North Warren. It crossed Route 62 and strengthened to an EF-1 tornado moving through a heavily wooded area at a cemetery and between homes. All the trees were felled, many in a criss-cross pattern. Healthy hardwoods were uprooted. Other trees and softwoods were snapped. Minor damage occurred to homes protected by the much taller trees with just some shingles, flashing, and windows impacted by the wind. One guest house near Conewango Creek was destroyed when a…

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

102°FJul 23, 2011

All-time low

−34°FFeb 11, 1979

Warmest night

77°FJul 23, 2011

Coldest day

−4°F2 times, most recently Feb 9, 1934

Wettest day

4.66 inOct 16, 1954

Snowiest day

17.0 inJan 1, 1949

Hottest year

1921mean 51.3°F

Coldest year

1917mean 43.8°F

Wettest year

200660.14 in

Driest year

194127.74 in

Snowiest season

128.5 in1977-78

Station Warren (USC00369298), 1,210 ft elevation, 4.3 miles from the population centre. Daily records from 1896 to October 23, 2026; 99.5% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00369298.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.