Alert archive / Indiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 89, NWS Indianapolis, IN

August 23, 2002Johnson County, Shelby County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 23, 2002, 6:22 PM EST for Johnson County, Shelby County, Indiana. It was in force for 38 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 23, 2002, 6:22 PM EST (23:22 UTC)
Expired
Aug 23, 2002, 7:00 PM EST
In force
38 min
Issued by
NWS Indianapolis, IN
Area
Counties, with a storm outline in the text

Counties Johnson County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 36 km from the middle of the area, began a volume at 23:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Aug 23, 6:27 PM ESTThunderstorm Wind 50 EGreenwood, INTrees down
Aug 23, 6:55 PM ESTThunderstorm Wind 50 EShelbyville, INTrees down

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.4 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2002-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1100 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2002-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1100 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
821 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 22, 9:03 PM ESTFlash Flood WarningINDFountain, Montgomery, Tippecanoe, Vermillion, Warren3 hr
Aug 22, 9:07 PM ESTFlash Flood WarningINDFountain, Montgomery, Tippecanoe, Vermillion, Warren4 hr
Aug 22, 10:20 PM ESTFlash Flood WarningINDBoone, Clinton3 hr
Aug 22, 10:22 PM ESTFlash Flood WarningINDBoone, Clinton4 hr
Aug 23, 12:57 AM ESTFlash Flood WarningINDFountain, Montgomery, Tippecanoe, Vermillion, Warren3 hr
Aug 23, 1:05 AM ESTFlash Flood WarningINDFountain, Montgomery, Tippecanoe, Vermillion, Warren4 hr
Aug 23, 1:09 AM ESTFlash Flood WarningINDFountain, Montgomery, Tippecanoe, Vermillion, Warren4 hr
Aug 23, 6:43 PM ESTSevere Thunderstorm WarningINDDecatur, Rush47 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.