Overview
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An area of low pressure tracked from southeastern Nebraska during the morning of April 2nd to western Wisconsin by evening, triggering two rounds of convection across central Illinois. Round 1 occurred during the morning, when a line of thunderstorms along the trailing cold front pushed into the Illinois River Valley. These storms were generally sub-severe, but one storm produced a downburst with estimated winds in excess of 70 mph across parts of Logan County, downing a few trees, tearing the roof off a business, and flipping 3 semis in and near Lincoln. Round 2 materialized by early afternoon as storms redeveloped along an outflow boundary from the morning convection along the I-55 corridor. These storms tapped into a moderately unstable and highly sheared environment and quickly became severe. Numerous reports of wind damage and hail were received as they congealed into a line and pushed eastward across I-57 by early evening. |
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Tornadoes
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NOTE: times shown below are local to your device's time zone. |
The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
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| Tornadoes that fail to impact any ratable structures on the EF-Scale are rated EF-Unknown (EF-U) | |||||
Photos & Video
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Environment
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Near-storm environment summary.
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Radar
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Additional Information
The Forecast
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| SPC Day 1 Categorical Outlook | SPC Day 1 Tornado Outlook | SPC Day 1 Hail Outlook | SPC Day 1 Wind Outlook |
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