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Note, I am not attempting to criticize the NWS at all. I simply enjoy analyzing tornado damage surveys in detail and sharing my personal observations and opinions! Also note, the revised EF scale is unreleased and the DIs shown here are still in draft, and could be adjusted in the finalized version.

The Rivers Edge Apartments' damage appears overrated. Misapplication of DoDs likely inflated the EF4 rating. Based on observed structural and tree damage, I believe the area’s rating should be EF3 (145 mph) overall.

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Trees: DI-28 (Multiple Trees) with DoD-6 [Greater than 75% of large trees snapped or uprooted; numerous trees may be stubbed, with only stubs of large limbs remaining]. Applying "EXP," this results in a low-end EF3 rating (145 mph).

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With the updated EF scale:

Apartments: DI-5 and DoD-7 [Most exterior walls collapsed on top stories with most interior walls remaining and/or almost all the roof structure are removed (>75%)]. With "EXP," this damage is better rated as high-end EF2 (135 mph).

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using upper-bound criteria, leading to an EF4 rating.

I suggest using DoD-5 [Trees debarked with only stubs of large branches remaining] with the "EXP" classification. This adjustment would yield a low-end EF3 rating (145 mph) for the tree damage.

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a low-end EF3 rating (140 mph) for the apartment damage.

The tornado also flattened a 1,200-ft-wide swath of trees along the Stillwater River. Many were denuded and debarked, but these trees are not particularly strong. NWS classified this area under DI-27 (Hardwood Trees)

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Based on my analysis, neither DoD-5 nor DoD-6 matches the observed damage. Instead, DoD-4 [Uplift or collapse of roof structure, leaving most walls standing] is more appropriate. Considering the apartments were well-constructed, the "EXP" designation applies. This results in—

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of top two stories (EF4/180 mph).

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