SEVERE WX : Flood Warning View Alerts

2020 Severe Weather Events: High-Based T'Storms of April 8, 2020

Here are the wind & hail reports from this High Plains-type event.

Posted: Apr 8, 2020 8:56 PM
Updated: Apr 10, 2020 6:39 PM

A band, a bow in the far south & a southern half supercell produced severe weather 7-8:30 p.m.

Temperatures reached 75-83 during the day, but dew points dropped to the 30s to 50 prior to the storms.

With steep lapse rates with the cold air aloft, strong wind fields & shear & upper trough (& very sharp height falls & sharp surface cold front), storms blossomed with high bases due to the dry, dry air near the surface.  Such a scenario is more common in the drier High Plains from western Texas & Oklahoma to eastern Montana & North Dakota than here.

Very strong to severe gusts reached the surface with the rainfall & t'storms due to the dry air.

Some minor damage to rooftops & trees occurred. 

The strongest wind gust in the area was measured near Thorntown with a measured gust of 75 mph with shingle & tree damage.  Trees & powerlines were reported down across Carroll County.  One tree fell over a drive way near Battle Ground.  A large limb fell from a tree at Otterbein.  Multiple power outages occurred in the area.

Hail covered the ground like snow in a discontinuous band from West Lebanon to north of Darlington.

Hail up to 1-1.50" occurred in this band.

The intensity of the storms & damage increased south & southeast of our area as dew points rose (along with more surface CAPE), but our dry surface & low levels wedged a few thousand feet up in those areas.  This enhanced gusts, which reached near 90 mph in places.  Shear & higher CAPE near/at the surface also produced one tornado (EF1 southwest of Indianapolis).

W = wind damage or measured gust 58 mph or greater

H = hail 1" in diameter or larger

T = Tornado

Measured t'Storm gusts that reached or exceeded 45 mph (I did include 60 mph Purdue Airport gust & our 54 mph gust as it occurred during rain & thunder.  I think the 60 mph gust in NWS LSR was labeled "Non-T'Storm Wind Gust":

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CountyConfirmedDeaths
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Steuben762
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West Lafayette
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Frankfort
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Delphi
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