NOAA ThreadEx Long-term Station Extremes for America

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NOAA ThreadEx Long-term Station Extremes for America
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ThreadEx is a data set of extreme daily temperature and precipitation values for 270 locations in the United States. For each day of the year at each station, ThreadEx provides the top 3 record high and low daily maximum temperatures, the top 3 record high and low daily minimum temperatures, the top 3 daily precipitation totals, along with the years the records were set for the date. Many of the time series are available back to the 1800s AD. This archive was developed for the express purpose of conveying general climate perspectives information. It is not appropriate for climate research.

Key Strengths

Key Strengths

Stitches together data from multiple sources to create long time series of extreme temperatures and precipitation amounts for each day of the year

Key Limitations

Key Limitations

Limited online documentation (more to be added here when available)

The 'threading' of data from nearby stations along with no adjustments for changing location and instrumentation makes it unsuitable for (say) climate change research.

Please cite data sources, following the data providers' instructions
Dataset DOIs
Hosted Climate Index Files
Usage Restrictions

Cite this page

Acknowledgement of any material taken from or knowledge gained from this page is appreciated:

National Center for Atmospheric Research Staff (Eds). Last modified "The Climate Data Guide: NOAA ThreadEx Long-term Station Extremes for America.” Retrieved from on 2024-06-21.

Citation of datasets is separate and should be done according to the data providers' instructions. If known to us, data citation instructions are given in the Data Access section, above.

Acknowledgement of the Climate Data Guide project is also appreciated:

Schneider, D. P., C. Deser, J. Fasullo, and K. E. Trenberth, 2013: Climate Data Guide Spurs Discovery and Understanding. Eos Trans. AGU, 94, 121–122,

Key Figures

Climate Data Guide Image: ThreadEx

ThreadEx extreme daily temperature and precipitation values for Milton, MA for 1893-2011. (TMAXHI->Highest maximum temperature; TMAXLO->Lowest maximum temperature; TMINHI->Highest minimum temperature; TMINLO->Lowest minimum temperature; PRCPHI - Highest precipitation). (Climate Data Guide; D. Shea)

Other Information

Type of data product
Dataset collections

Years of record
Data time period extended
Yes, data set is extended
Input Data

station data

Vertical Levels:
Missing Data Flag
Missing data present
Ocean or Land
Land Only
Spatial Resolution


Model Resolution (reanalysis)
Data Assimilation Method
Model Vintage (reanalysis)

Key Publications
Not available...