# Windshear or thunderstorm - Type: NTSB defining event - NTSB code: 390 - CICTT category: Windshear/Thunderstorm - Defining event in: 119 cases - In the sequence of: 224 cases - Fatal cases: 29 - All cases: https://openairdocs.org/ntsb-events/390/cases.md - Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/390/sequence.md - Page: https://openairdocs.org/ntsb-events/390 ## Cases per year (defining / in the sequence) - 2008: 7 / 17 - 2009: 5 / 13 - 2010: 6 / 9 - 2011: 10 / 17 - 2012: 12 / 21 - 2013: 3 / 8 - 2014: 9 / 17 - 2015: 7 / 15 - 2016: 5 / 10 - 2017: 4 / 12 - 2018: 4 / 8 - 2019: 4 / 7 - 2020: 3 / 5 - 2021: 6 / 10 - 2022: 10 / 13 - 2023: 7 / 16 - 2024: 7 / 11 - 2025: 5 / 7 - 2026: 5 / 8 ## Phase of flight - Enroute-cruise: 23 cases - Initial climb: 16 cases - Approach-VFR pattern final: 12 cases - Landing: 11 cases - Takeoff: 11 cases - Enroute: 9 cases - Landing-flare/touchdown: 6 cases - Enroute-climb to cruise: 5 cases - Approach: 4 cases - Enroute-descent: 4 cases ## In the probable cause of these cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 38 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 32 cases - [Windshear](https://openairdocs.org/ntsb-findings/03034020) (Environmental issues): 26 cases - [Thunderstorm](https://openairdocs.org/ntsb-findings/03033010) (Environmental issues): 25 cases - [Weather planning](https://openairdocs.org/ntsb-findings/02061020) (Personnel issues): 12 cases - [Downdraft](https://openairdocs.org/ntsb-findings/03034035) (Environmental issues): 10 cases - [Sudden wind shift](https://openairdocs.org/ntsb-findings/03034010) (Environmental issues): 7 cases - [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 7 cases - [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 7 cases - [Climb capability](https://openairdocs.org/ntsb-findings/01061010) (Aircraft): 7 cases ## Aircraft models (registry) - [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 2 cases - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 2 cases - [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 2 cases - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 2 cases - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 2 cases - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 2 cases - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 2 cases - [Cessna 152](https://openairdocs.org/model/cessna-152): 2 cases - [Piper PA 46-350P](https://openairdocs.org/model/piper-pa-46-350p): 2 cases - [Universal GLOBE GC-1A](https://openairdocs.org/model/universal-globe-gc-1a): 1 cases ## Newest cases - [NTSB CEN26LA297](https://openairdocs.org/ntsb/CEN26LA297), Aug 17, 2026: Aeroprakt Manufacturing SP Zoo A22LS (N22FC), Searcy, AR, substantial damage. Probable cause: The flight instructor’s failure to maintain airplane control during landing in gusting wind conditions. - [NTSB WPR26FA294](https://openairdocs.org/ntsb/WPR26FA294), Aug 7, 2026: Textron 172S (N1842E), Provo, UT, substantial damage, 1 fatal, investigation ongoing - [NTSB WPR26FA254](https://openairdocs.org/ntsb/WPR26FA254), Jul 10, 2026: Beech 95-B55 (T42A) (N202DK), Waterloo, IL, destroyed, 2 fatal, investigation ongoing - [NTSB CEN26LA169](https://openairdocs.org/ntsb/CEN26LA169), Apr 19, 2026: Luscombe 8E (N1398K), Meeker, CO, substantial damage. Probable cause: The pilot’s inability to maintain climb performance and clearance from terrain due to the airplane’s encounter with windshear during takeoff. - [NTSB CEN26LA159](https://openairdocs.org/ntsb/CEN26LA159), Apr 5, 2026: Piper PA46 (N95AG), Burke, TX, substantial damage. Probable cause: The airplane’s encounter with unexpected low-level wind shear during final approach, which resulted in a hard impact with the runway. - [NTSB DCA26WA043](https://openairdocs.org/ntsb/DCA26WA043), Nov 22, 2025: Boeing 737 (JA737X), Tomakomai, Japan, substantial damage - [NTSB DCA26WA004](https://openairdocs.org/ntsb/DCA26WA004), Oct 10, 2025: Boeing 777 (G-VIIG), Nassau, Bahamas, incident - [NTSB WPR25LA235](https://openairdocs.org/ntsb/WPR25LA235), Aug 1, 2025: Cessna 180J (N52175), Kamiah, ID, substantial damage. Probable cause: The pilot’s loss of airplane control following an encounter with a microburst during takeoff. - [NTSB WPR25LA152](https://openairdocs.org/ntsb/WPR25LA152), May 6, 2025: Dehavilland DHC-6-300 (N142SA), Boulder City, NV, substantial damage, investigation ongoing - [NTSB DCA25LA197](https://openairdocs.org/ntsb/DCA25LA197), May 2, 2025: Boeing 737 (N247WN), Centerville, TN, substantial damage. Probable cause: An encounter with hail during descent. NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted. Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1). NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.