Alert archive / Indiana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 19, NWS Wilmington, OH

April 20, 1996Franklin County, Indiana

NWS Wilmington, OH issued this severe thunderstorm warning at Apr 20, 1996, 1:13 AM EST for Franklin County, Indiana. It was in force for 47 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
Apr 20, 1996, 1:13 AM EST (06:13 UTC)
Expired
Apr 20, 1996, 2:00 AM EST
In force
47 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Franklin County, IN

The radar

The Cincinnati radar (KILN), 106 km from the middle of the area, began a volume at 06:13 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.2 hours before the alert went out and 108 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 00:00Z on 1996-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1144 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 00:00Z on 1996-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.1939587897117Sfc1 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
1144 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.8

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 19, 7:31 PM EST, 5 hours 42 minutes earlier.

Area forecast discussion, Apr 19, 7:31 PM EST, 5 hours 42 minutes before
FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
830 PM EDT FRI APR 19 1996

SUPERCELL NR IND ATTM MOVG E AT 40 MPH.  CELL IS STILL IMPRESSIVE BUT
NOT QUITE AS IMPRESSIVE AS EARLIER (TORNADO SIGNATURE).  LDS IS GIVING
50-59 STRIKES IN PAST 5 MINUTES WITH THIS STORM.  CURRENT MOVEMENT
WOULD TAKE CENTER OF STORM NR WAYNE-FAYETTE-UNION IN COUNTIES THEN INTO
PREBLE CO.  OUR PROFILER IS SHOWG SAME OMINOUS TREND AS KIND AS LOW LVL
WINDS BACK FM SW TO S TO SE ALLOWING FOR GOOD STORM INFLOW.  00Z ILN
SOUNDG HAS A SWEAT INDEX OF 554!  IMAGINE THAT THIS # IS EVEN HIGHER
WHEN LWST LVL WINDS OF SE DIRECTION TAKEN INTO ACCOUNT AS WELL AS
STRENGTHENING WINDS ALOFT.  HELICITY VALUES BETWEEN 200 AND 250 WITH
SHOWALTER OF -4.

OTHER THAN THE ISOLATED SUPERCELL...A LINE OF TSTMS XTNDS ACROSS
C IL AND THIS IS WHAT WL MOVE IN AND GIVE MUCH OF THE FA THE THREAT
OF SVR WX.  IT SHOULD BE ENTERING W FA SHORTLY AFT MIDNGT.  WL
CONTINUE FCST FOR RW/TRW TNGT...POSS SEVERE. WL BE VERY BUSY
SHORTLY.
SANDLER

In the hours before

Special weather statement, Apr 19, 9:29 PM EST, 3 hours 44 minutes before
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Local storm report, Apr 19, 9:58 PM EST, 3 hours 15 minutes before
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Local storm report, Apr 19, 10:05 PM EST, 3 hours 8 minutes before
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Local storm report, Apr 19, 10:12 PM EST, 3 hours 1 minute before
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Special weather statement, Apr 19, 11:30 PM EST, 1 hour 43 minutes before
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Special weather statement, Apr 19, 11:37 PM EST, 1 hour 36 minutes before
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The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 8:58 PM ESTSevere Thunderstorm WarningILNDarke, Preble62 min
Apr 19, 9:23 PM ESTSevere Thunderstorm WarningILNMontgomery37 min
Apr 19, 9:35 PM ESTSevere Thunderstorm WarningILNMiami40 min
Apr 19, 9:53 PM ESTSevere Thunderstorm WarningILNChampaign, Clark, Greene52 min
Apr 20, 2:01 AM ESTSevere Thunderstorm WarningILNBoone29 min
Apr 19, 7:54 PM ESTTornado WarningILNFayette, Union, Wayne66 min
Apr 19, 8:59 PM ESTSevere Thunderstorm WarningILNUnion, Wayne31 min
Apr 20, 1:17 AM ESTSevere Thunderstorm WarningILNSwitzerland43 min
Apr 20, 1:24 AM ESTSevere Thunderstorm WarningILNFayette, Union36 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1996Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.