Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic 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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