Widespread life-threatening flash and urban flooding continues in south-central Texas, with considerable flooding impacts possible across central Texas. Wildfire smoke is impacting air quality across much of the Great Lakes region into southern New England and the Mid-Atlantic. Monsoonal thunderstorms may produce isolated to scattered flash flooding across the Southwest into the Great Basin. Read More >
Overview
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A fast moving line of showers and thunderstorms tracked east over eastern Iowa late Thursday evening. A brief, weak tornado touched down just northwest of Olin, IA damaging a metal shed and displacing a fire hydrant.
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 Radar Image (11:15 P.M.) (IEM) (Click to zoom) (Click here for Animation) |
Tornadoes:
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Tornado - Olin, IA
Track Map  
Downloadable KMZ File |
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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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Photos & Video:
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| Olin, IA (NWS Survey) |
Olin, IA (NWS Survey) |
Environment
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| Figure 1: SPC Day 1 Outlook (20:00 UTC) | Figure 2: SPC Day 1 Tornado Outlook (20:00 UTC) | Figure 3: SPC Day 1 Hail Outlook (20:00 UTC) |
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| Figure 4: SPC Day 1 Wind Outlook (20:00 UTC) | Figure 5: DVN Sounding: 5/3/18 19z | Figure 6: DVN Sounding: 5/4/18 00z |
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