Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 252, NWS Northern Indiana

September 20, 1998Kosciusko County, Noble County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Sep 20, 1998, 5:23 PM EST for Kosciusko County, Noble 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
Sep 20, 1998, 5:23 PM EST (22:23 UTC)
Expired
Sep 20, 1998, 6:10 PM EST
In force
47 min
Issued by
NWS Northern Indiana
Area
Whole counties

Counties Kosciusko County, IN, Noble County, IN

The radar

The Northern Indiana radar (KIWX), 7 km from the middle of the area, began a volume at 22:25 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

Detroit, MI (KDTX), launched 12:00Z, 10.4 hours before the alert went out and 240 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, Detroit, MI at 12:00Z on 1998-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 147 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, Detroit, MI at 12:00Z on 1998-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.193958Sfc1 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
147 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1350 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFWA 202223 RRA
SVRFWA
INC085-087-113-202310-

BULLETIN- EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
523 PM EST SUN SEP 20 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KOSCIUSKO COUNTY IN NORTH CENTRAL INDIANA
  LAGRANGE COUNTY IN NORTHEASTERN INDIANA
  NOBLE COUNTY IN NORTHEASTERN INDIANA

* UNTIL 610 PM EST

* AT 519 PM EST... DOPPLER RADAR AT NORTH WEBSTER INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM MILLERSBURG TO NORTH WEBSTER.
  THE STORMS WERE MOVING NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE PATH OF THIS SEVERE THUNDERSTORM ARE...
  LIGONIER
  TOPEKA
  ALBION
  EMMA

SvEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM WINDOWS.  WINDS IN
EXCESS OF 60MPH ARE POSSIBLE!

JAH/PAVLOW

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 20, 4:52 PM ESTSevere Thunderstorm WarningIWXElkhart48 min
Sep 20, 4:56 PM ESTSevere Thunderstorm WarningIWXSaint Joseph19 min
Sep 20, 5:23 PM ESTSevere Thunderstorm WarningIWXLaGrange47 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1998Every severe thunderstorm warning in 1998

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.