Arctic air lingers for the east, however, winds will slowly subside and a slow moderating trend starts during the week. Moisture continues to provide rainfall and higher elevation snow for the Pacific Northwest, northern California and northern Rockies through Monday. For the State of Hawaii, dangerous surf conditions with strong winds and heavy rainfall will impact the islands through Monday. 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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