Issued or Partial Issued States: IA, IL, MO – Map inside shows affected state areas.
Site: National Weather Force has issued a Tornado Watch effective now through 4am Central Time 9-19-2022
Date: 9/18/22 at 3:20pm Central Time
Forecast: A surface low will move across the region this evening and tonight and evening starting in the Iowa areas of the watch first and moving eastward with time. …and this will bring a corridor of surface instability to the watch area. This, with developing low-level shear will make tornadoes possible.
Given the instability/shear values, notable tornado dynamics will be in the area, enough for a low to medium-grade watch for up to EF1-2 tornadoes, but, I do see on my model a small area of moderate, thus we could have an isolated strong tornado in this watch.
In addition to the tornado risk, large hail and damaging winds will be likely …
A NWF Tornado Watch is issued when notable tornado dynamics exist within the NWF in-house Tornado Risk Model below …
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