NOAA/NWS Storm Prediction Center

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= NOAA/NWS Storm Prediction Center

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A Slight Risk of Severe Thunderstorms is Forecast Today and/or Tonight

Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail.

For additional details, see the latest Day 1 Convective Outlook.

SPC Products Overview

Hazard	Sun (04/20)	Mon (04/21)	Tue (04/22)	Wed (04/23)	Thu (04/24)	Fri (04/25)	Sat (04/26)	Sun (04/27)
Severe	Slight	No Severe	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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MDs

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Fire

Severe Weather Climatology (1982-2011)

Any Severe Probabilities: 21 Apr

Tornado Probabilities: 21 Apr

Damaging Wind Probabilities: 21 Apr

Severe Hail Probabilities: 21 Apr

Significant Tornado Probabilities: 21 Apr

Significant Wind Probabilities: 21 Apr

Significant Hail Probabilities: 21 Apr

More severe weather climatology data here.

Today's Storm Report Trend


report time

Full-size plot here.

Did You Know?

What's My Risk?

La tormenta factor de riesgo.

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2025 Watch Summaries

Page last modified: April 20 2025 12:28 UTC

Wildfire Climatology (1992-2015)

100 Acres Wildfire Probabilities: 21 Apr

300 Acres Wildfire Probabilities: 21 Apr

1000 Acres Wildfire Probabilities: 21 Apr

5000 Acres Wildfire Probabilities: 21 Apr

More wildfire climatology data here.

Latest SPC Publications

Edwards, R., and R.L. Thompson, 2024: Right-Moving Supercell Tornadogenesis during Interaction with a Left-Moving Supercell's Rear-Flank Outflow. Published in Wea. Forecasting. [15153K PDF] (supplemental radar loop, standard enhancements [27170K MP4]), (supplemental radar loop, colorblind enhancements [33950K MP4])
Squitieri, B.J., A.R. Wade, and I.L. Jirak, 2023: A Historical Overview on the Science of Derechos. Part II: Parent Storm Structure, Environmental Conditions, and History of Numerical Forecasts. Published in Bull. Amer. Meteor. Soc.. [10595K PDF]
Squitieri, B.J., A.R. Wade, and I.L. Jirak, 2023: A Historical Overview on the Science of Derechos. Part I: Identification, Climatology, and Societal Impacts. Published in Bull. Amer. Meteor. Soc.. [6899K PDF]
Thompson, R.L., 2023: A Comparison of Right-Moving Supercell and Quasi-Linear Convective System Tornadoes in the Contiguous United States 2003-21. Published in Wea. Forecasting. [4539K PDF]
Gallo, B.T., K.A. Wilson, J.J. Choate, K. Knopfmeier, P. Skinner, B. Roberts^*, P.L. Heinselman, I.L. Jirak, and A.J. Clark, 2022: Exploring the Watch-to-Warning Space: Experimental Outlook Performance during the 2019 Spring Forecasting Experiment in NOAA's Hazardous Weather Testbed. Published in Wea. Forecasting. [4328K PDF]
Squitieri, B.J., and W.A. Gallus Jr., 2022: On the Changes in Convection-Allowing WRF Forecasts of MCS Evolution due to Decreases in Model Horizontal and Vertical Grid Spacing. Part II: Impacts on QPFs. Published in Wea. Forecasting. [5607K PDF]
Squitieri, B.J., and W.A. Gallus Jr., 2022: On the Changes in Convection-Allowing WRF Forecasts of MCS Evolution due to Decreases in Model Horizontal and Vertical Grid Spacing. Part I: Changes in Cold Pool Evolution. Published in Wea. Forecasting. [3655K PDF]
Harrison, D.R., M.S. Elliott, I.L. Jirak, and P.T. Marsh, 2022: Utilizing the High-Resolution Ensemble Forecast System to Produce Calibrated Probabilistic Thunderstorm Guidance. Published in Wea. Forecasting. [2549K PDF]
Find more research articles at the SPC publication archive.

Latest SPC Case Archive

Apr 19, 2025	Tornado: 17	Wind: 151	Hail: 27

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