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A Slight Risk of Severe Thunderstorms is Forecast for Sun (08/09)

Scattered damaging winds may occur Sunday from eastern Iowa across northern Illinois and Indiana. A concentrated area of damaging wind and hail is also expected over much of South Dakota.
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For additional details, see the latest Day 2 Convective Outlook.

SPC Products Overview

Hazard	Sat (08/08)	Sun (08/09)	Mon (08/10)	Tue (08/11)	Wed (08/12)	Thu (08/13)	Fri (08/14)	Sat (08/15)
Severe	Marginal	Slight	Slight	No Area	No Area	No Area	No Area	No Area
Fire	Elevated	Elevated	No Area	No Area	No Area	No Area	No Area	No Area

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Severe Weather Climatology (1994-2024)

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Any Severe Probabilities: 09 Aug

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Sig Severe Probabilities: 09 Aug

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Tornado Probabilities: 09 Aug

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Damaging Wind Probabilities: 09 Aug

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Severe Hail Probabilities: 09 Aug

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Significant Tornado Probabilities: 09 Aug

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Significant Wind Probabilities: 09 Aug

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Significant Hail Probabilities: 09 Aug

More climatology data here.

2026 Tornado Watch Summary

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Page last modified: August 08 2026 12:27 UTC

Did You Know?

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What's My Risk?

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La tormenta factor de riesgo.

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What's a Watch?

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Tornado Safety Tips

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Forecast Tools

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HREF

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Mesoanalysis

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Observed Soundings

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Tornado Environment Browser

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Upper-Air Maps

2026 Severe Thunderstorm Watch Summary

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Page last modified: August 08 2026 12:28 UTC

Wildfire Climatology (1992-2020)

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100 Acres Wildfire Probabilities: 09 Aug

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300 Acres Wildfire Probabilities: 09 Aug

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1000 Acres Wildfire Probabilities: 09 Aug

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5000 Acres Wildfire Probabilities: 09 Aug

More climatology data here.

Latest SPC Publications

Squitieri, B.J., A.R. Wade, and I.L. Jirak, 2026: On a Comprehensive Archive for Derechos across the Contiguous United States. Published in Bull. Amer. Meteor. Soc.. [6300K PDF]
Chalmers, Z. A., M. D. Parker, 2026: Variability in High-Shear, Low-CAPE QLCS Environments in the Southeastern United States. Published in Wea. Forecasting. [21500K PDF]
Lyons, A. D., R. L. Thompson, B. T. Smith, H. G. Weinman, and A. R. Dean, 2026: Convective Mode Classification and Distribution of Contiguous U.S. Tornado Events from 2003 to 2023. Published in Wea. Forecasting. [19600K PDF]
Harrison, D.R., A. McGovern, C.D. Karstens, A. Bostrom, I.L. Jirak, and P.T. Marsh, 2025: Leveraging Coproduction to Bridge Research and Operations in Operational Meteorology. Published in Wea. Forecasting. [6601K PDF]
Harrison, D.R., A. McGovern, C.D. Karstens, A. Bostrom, I.L. Jirak, and P.T. Marsh, 2025: An Assessment of How Domain Experts Evaluate Machine Learning in Operational Meteorology. Published in Wea. Forecasting. [16916K PDF]
Squitieri, B.J., A.R. Wade, and I.L. Jirak, 2025: On a Modified Definition of a Derecho. Part II: An Updated Spatial Climatology of Derechos across the Contiguous United States. Published in Bull. Amer. Meteor. Soc.. [3250K PDF]
Squitieri, B.J., A.R. Wade, and I.L. Jirak, 2025: On a Modified Definition of a Derecho. Part I: Construction of the Definition and Quantitative Criteria for Identifying Future Derechos over the Contiguous United States. Published in Bull. Amer. Meteor. Soc.. [5585K PDF]
Moore, A., 2024: Investigating the Near-Surface Wind Fields of Downbursts Using a Series of High-Resolution Idealized Simulations. Published in Wea. Forecasting. [6768K PDF]
Find more research articles at the SPC publication archive.

Latest SPC Case Archive

Aug 07, 2026	Tornado: 1	Wind: 261	Hail: 39

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