Overview
Thunderstorms developed along and north of a warm front and along with an upper disturbance during the evening of May 19 and early morning of May 20. The initial round of storms brought large hail, while the later storms brought damaging winds and a tornado that moved into Knox County from Illinois.Tornado
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Tornado - Near Monroe City
Track Map
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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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Radar
Early Evening Storms
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| Radar Loop of May 19 Evening |
Late Evening and Early Morning Storms
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| Radar at 11 PM EDT May 19 | Radar at 2:20 AM EDT May 20 |
Storm Reports
Below are reports received by NWS Indianapolis.
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM Hail 1 N Sandborn 38.90N 87.19W
05/19/2022 E2.00 inch Knox IN Public
Report with a picture showing around 2 inch
hail just north of Sandborn, IN.
0540 PM Hail Vincennes 38.68N 87.51W
05/19/2022 E1.00 inch Knox IN Emergency Mngr
0545 PM Hail 1 WSW Vincennes 38.67N 87.52W
05/19/2022 E1.50 inch Knox IN Public
0552 PM Hail 4 E Vincennes 38.69N 87.37W
05/19/2022 E1.00 inch Knox IN Trained Spotter
0615 PM Hail 2 NNE Washington 38.68N 87.17W
05/19/2022 M1.25 inch Daviess IN Broadcast Media
1.27 inch hail found along the road after a
bit of melting.
0641 PM Hail 1 ENE West Boggs Lake 38.73N 86.92W
05/19/2022 E2.00 inch Martin IN Public
0641 PM Hail 1 E West Boggs Lake 38.73N 86.91W
05/19/2022 E2.75 inch Martin IN Public
0726 PM Hail Mitchell 38.73N 86.47W
05/19/2022 E2.00 inch Lawrence IN Broadcast Media
Picture received via social media of 2 inch
hail. Time estimated from radar.
0726 PM Hail Mitchell 38.73N 86.47W
05/19/2022 E1.75 inch Lawrence IN Public
1054 PM TORNADO DECKER 38.52N 87.53W
05/19/2022 KNOX IN NWS STORM SURVEY
DELAYED REPORT. NWS SURVEY FOUND EF2 TORNADO
DAMAGE ALONG A 26 MILE PATH FROM ILLINOIS
INTO INDIANA. MAX ESTIMATED WIND SPEEDS WITH
THE TORNADO WERE 115 MPH. DAMAGE IN KNOX
COUNTY INDIANA WAS ONLY EF1 WITH THE MOST
SEVERE DAMAGE IN DECKER.
1100 PM Tstm Wnd Dmg Decker 38.52N 87.53W
05/19/2022 Knox IN Emergency Mngr
Trees and utility lines down in and around
the Decker area.
1100 PM Tstm Wnd Dmg 3 NNW Decker 38.56N 87.54W
05/19/2022 Knox IN Emergency Mngr
Semi truck blown over on US 41.
1100 PM Tstm Wnd Dmg 3 NNW Decker 38.56N 87.54W
05/19/2022 Knox IN Emergency Mngr
Semi truck blown over on US 41 near Firemen
Rd.
1140 PM Tstm Wnd Dmg 4 SSW Clayton 39.63N 86.54W
05/19/2022 Hendricks IN Public
15-20 Trees Blown Down. 9173 South County Rd
100 West. Time estimated.
0220 AM Tstm Wnd Dmg 1 SW Seymour 38.95N 85.90W
05/20/2022 Jackson IN Emergency Mngr
Baseball dugout had significant damage with
roof lifted off and cinder block wall
knocked down. Aluminum bleachers were blown
into fence of baseball field. Building
onsite only had minor siding damage. Damage
all laid out to north and northeast along
storm track path.
0239 AM Tstm Wnd Dmg 1 NE North Vernon 39.02N 85.62W
05/20/2022 Jennings IN Emergency Mngr
Numerous trees and utility lines down on
northeast side of North Vernon. Tree fall
direction mainly to the north and northeast.
0310 AM Tstm Wnd Dmg 3 ESE Milford 39.34N 85.57W
05/20/2022 Decatur IN Emergency Mngr
Late report of a pole snapped about half way
up at West Base Road and North County Road
500 West. Time estimated from radar.
&&
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Environment
Thunderstorms developed along a surface warm front..
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| Figure 1: MSLP at 5 PM EDT | Figure 2: Mixed Layer CAPE at 5 PM EDT | Figure 3: Significant Hail Parameter at 6 PM EDT |
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