Alert archive / Indiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 59, NWS Indianapolis, IN

June 1, 1999Vermillion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jun 1, 1999, 9:56 PM EST for Vermillion County, Indiana. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 1, 1999, 9:56 PM EST (02:56 UTC)
Expired
Jun 1, 1999, 10:30 PM EST
In force
34 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Vermillion County, IN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 1, 8:45 PM ESTTornado WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.9 hours before the alert went out and 102 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, Lincoln, IL at 00:00Z on 1999-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1323 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 1999-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 square meters per square second.19395878Sfc1 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
1323 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
945 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
1.1
Supercell composite
7.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 10:06 PM ESTSevere Thunderstorm WarningINDSullivan, Vigo39 min
Jun 1, 10:22 PM ESTSevere Thunderstorm WarningINDParke23 min
Jun 1, 10:26 PM ESTTornado WarningINDFountain49 min
Jun 1, 10:30 PM ESTSevere Thunderstorm WarningINDClay30 min
Jun 1, 10:42 PM ESTSevere Thunderstorm WarningINDOwen, Putnam48 min
Jun 1, 10:42 PM ESTSevere Thunderstorm WarningINDMontgomery48 min
Jun 1, 10:46 PM ESTSevere Thunderstorm WarningINDKnox44 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.