Event Summary: October 9th, 2018

Overview

Scattered showers and thunderstorms developed across much of eastern IA, northwest IL and northeast MO on the afternoon and evening of October 9th. This was due to a strong cold front and associated low pressure system advancing eastward across west central IA. Several supercells developed, with one producing a confirmed tornado near Blairstown, IA in Benton county. Other storms produced hail up to penny size, locally heavy rainfall, and brief funnel clouds.

Radar Image: Tuesday 10/9 5:00 pm

Tornado
Radar
Storm Reports
Rainfall
Environment

Tornado:

1 SE Blairstown, Iowa
Benton County

Date	10/09/2018
Time (Local)	3:48 PM CDT
EF Rating	EF0
Est. Peak Winds	70 MPH
Path Length	0.01 Miles
Max Width	10 Yards
Injuries/Deaths	0
Summary: A brief tornado was observed by a broadcast meteorologist less than a mile southeast of Blairstown, Iowa. The tornado touched down in a field and was on the ground for less than 30 seconds. No damage was observed.

Track Map

EF-Scale

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

Radar:

Radar Loop - Courtesy Iowa Environmental Mesonet

Storm Reports

Interactive Storm Report Map	SPC Storm Reports

Rain Reports

Local Rainfall Map

Radar Image

Regional Estimated Rainfall

Radar Image

Environment


Figure 1: SPC Day 1 Outlook (200z)	Figure 2: SPC Day 1 Tornado Outlook (200z)	Figure 3: SPC Day 1 Wind Outlook (2000z)	Figure 4: SPC Day 1 Hail Outlook (2000z)


Figure 5: DVN Sounding 10/9/18 12z	Figure 6: DVN Sounding 10/10/18 00z


Figure 7: SPC Mesoscale Discussion #1550 (see link for details)	Figure 8: SPC Mesoscale Discussion #1553 (see link for details)	Figure 9: SPC Mesoscale Discussion #1555 (see link for details)

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