Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 55, NWS Northern Indiana

May 31, 1998Allen County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at May 31, 1998, 1:35 PM EST for Allen County, Indiana. It was in force for 50 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: May 31, 1998, 1:35 PM EST (18:35 UTC)
Expired: May 31, 1998, 2:25 PM EST
In force: 50 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Allen County, IN

The radar

The Northern Indiana radar (KIWX), 61 km from the middle of the area, began a volume at 18:35 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 31, 12:15 PM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.6 hours before the alert went out and 214 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1259 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 874 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFWA 311834 RRA
SVRFWA
INC003-311920-

BULLETIN- EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
135 PM EST SUN MAY 31 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEN COUNTY IN NORTHEASTERN INDIANA

* UNTIL 225 PM EST

* AT 131 PM EST... DOPPLER RADAR AT NORTH WEBSTER INDICATED A
  SEVERE THUNDERSTORM 9 MILES NORTHEAST OF MOVING SOUTHEAST AT
  40 MPH.

* SOME LOCATIONS IN THE PATH OF THIS TORNADO ARE...
  WOODBURN
  EDGERTON
  GRABILL
  NORTHEAST FORT WAYNE
  NEW HAVEN
  HARLAN

REPORTS OF LARGE HAIL AND WIND DAMAGE HAVE BEEN RECEIVED FROM
THESE STORMS AS THEY MOVED THROUGH SOUTHERN DEKALB CxOUNTY.

JAH/TL

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 Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 10:14 AM EST, 3 hours 21 minutes earlier.

Area forecast discussion, May 31, 10:14 AM EST, 3 hours 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1014 AM EST SUN MAY 31 1998

THUNDERSTORMS THE MAIN CONCERN THIS UPDATE. BEST CHANCE OF CONVECTION
OVER SE ZONES INTO EARLY AFTERNOON BUT WOULD NOT BE SURPRISED IF A
FEW SHOWERS OR THUNDERSTORMS POPPED UP ELSEWHERE AS SECONDARY FRONT
SWEEPS ACROSS THE AREA. ADAP FIELDS INDICATING THE MOST UNSTABLE AIR
FROM NORTHERN INDIANA INTO EAST CENTRAL MISSOURI WHERE ENHANCED
CLOUDINESS IS CURRENTLY DEVELOPING PER SATELLITE LOOP. ETA
INDICATING CAPES APPROACHING 3000 J/KG OVER SE ZONES BY 18Z. SEVERAL
PARAMETERS STILL FAVORABLE INTO EARLY AFTERNOON OVER SE HALF OF CWA
FOR STRONG/SEVERE THUNDERSTORMS. WOULD LOWER POPS IN INDIANA ZONES
TO CHANCE AND ADD CHANCE POPS TO MI ZONES ST. JOSEPH TO HILLSDALE
THROUGH EARLY AFTERNOON.

1 KM VIS INDICATING A FAIR AMOUNT OF BREAKS IN THE CLOUDS THIS
MORNING WHICH SHOULD KEEP TEMPS ON TRACK TO NEAR CURRENT FORECAST
VALUES IN OH ZONES. TEMPERATURES WILL NEED TO BE ADJUSTED IN
INDIANA ZONES...PROBABLY INTO THE MID 80S. MICHIGAN ZONES WILL LIKELY
NEED TO BE TWEAKED ALSO AS TEMPERATURES HAVE CLIMBED INTO THE LOW 80S
IN SOME LOCATIONS. CAA SHOULD BRING TEMPS DOWN BEFORE MICHIGAN
ZONES CLIMB AJNY HIGHER THAN 85.

.IWX...NONE.

TAL

In the hours before

Special weather statement, May 31, 12:41 PM EST, 54 minutes before

INZ006>009-012>018-020-022>027-032>034-OHZ001-002-004-005-015-016-
024-025-312300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1241 PM EST SUN MAY 31 1998

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 600 PM EST/700 PM
EDT FOR A LARGE PART OF NORTHERN AND NORTHEASTERN INDIANA AND
NORTHWEST OHIO...

SOME COUNTIES INCLUDED IN THIS WATCH INCLUDE THE FOLLOWING:

IN INDIANA...STARKE...PULASKI...WHITE...MARSHALL...FULTON...CASS...
KOSCIUSKO...MIAMI...WABASH...LAGRANGE...NOBLE...WHITLEY...HUNTINGTON
...GRANT...STEUBEN...DEKALB...ALLEN...WELLS...ADAMS...BLACKFORD...
AND JAY.

IN OHIO...WILLIAMS...HENRY...DEFIANCE...HENRY...PAULDING...PUTNAM
...VAN WERT AND ALLEN.

LARGE HAIL...DAMAGING WIND ARE POSSIBLE FOR THE REST OF THIS
AFTERNOON IN AND CLOSE TO THE WATCH AREA.  REMEMBER...SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING SO BE
PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES.

PERSONS SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS
AND STAY TUNED TO NOAA WEATHER RADIO..LOCAL RADIO OR TELEVISION FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

TEH

Local storm report, May 31, 1:28 PM EST, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH WEBSTER INDIANA
128 PM EST SUN MAY 31 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0116 PM    HICKSVILLE                OH   1 INCH HAIL
05/31/98   DEFIANCE

Local storm report, May 31, 1:30 PM EST, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH WEBSTER INDIANA
130 PM EST SUN MAY 31 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0116 PM    HICKSVILLE                OH   1 INCH HAIL
05/31/98   DEFIANCE

0129 PM    HICKSVILLE                OH   1.75 INCH HAIL
05/31/98   DEFIANCE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 11:54 AM EST	Tornado Warning	IWX	LaGrange, Steuben	36 min
May 31, 12:14 PM EST	Tornado Warning	IWX	DeKalb	51 min
May 31, 12:17 PM EST	Severe Thunderstorm Warning	IWX	Noble	48 min
May 31, 12:35 PM EST	Tornado Warning	IWX	Noble	50 min
May 31, 12:49 PM EST	Tornado Warning	IWX	Allen	46 min
May 31, 1:05 PM EST	Tornado Warning	IWX	DeKalb	30 min
May 31, 1:07 PM EST	Severe Thunderstorm Warning	IWX	Whitley	48 min
May 31, 1:39 PM EST	Severe Thunderstorm Warning	IWX	Allen	46 min
May 31, 1:48 PM EST	Severe Thunderstorm Warning	IWX	Grant	62 min
May 31, 1:59 PM EST	Severe Thunderstorm Warning	IWX	Blackford	46 min
May 31, 2:05 PM EST	Tornado Warning	IWX	Blackford, Grant	50 min
May 31, 2:09 PM EST	Severe Thunderstorm Warning	IWX	Jay	51 min
May 31, 2:31 PM EST	Severe Thunderstorm Warning	IWX	Adams, Wells	49 min
May 31, 3:38 PM EST	Severe Thunderstorm Warning	IWX	Grant	47 min
May 31, 4:15 PM EST	Tornado Warning	IWX	Blackford	35 min
May 31, 4:23 PM EST	Severe Thunderstorm Warning	IWX	Jay	32 min
May 31, 4:29 PM EST	Tornado Warning	IWX	Jay	31 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1998 Every 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.