Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 233, NWS Northern Indiana

August 24, 1998Grant County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Aug 24, 1998, 4:49 PM EST for Grant County, Indiana. It was in force for 51 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 24, 1998, 4:49 PM EST (21:49 UTC)
Expired: Aug 24, 1998, 5:40 PM EST
In force: 51 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Grant County, IN

The radar

The Northern Indiana radar (KIWX), 94 km from the middle of the area, began a volume at 21:52 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

Time	Report	Where	Remark
Aug 24, 5:15 PM EST	Thunderstorm Wind	Hackleman, IN	NUMEROUS TREES DOWN.
Aug 24, 5:23 PM EST	Thunderstorm Wind	Marion, IN	WIDESPREAD TREE DAMAGE IN MARION AND ACROSS GRANT COUNTY.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 24, 2:00 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.8 hours before the alert went out and 199 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: 503 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 93 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.

393 
WUUS53 KIWX 242152 RRA
SVRFWA
INC053-242240-

BULLETIN- EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
449 PM EST MON AUG 24 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRANT COUNTY IN NORTH CENTRAL INDIANA

* UNTIL 540 PM EST

* AT 448 PM EST... DOPPLER RADAR AT NORTH WEBSTER INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTHWEST OF MARION MOVING SOUTHEAST
  AT 45 MPH.

* SOME LOCATIONS IN THE PATH OF THIS SEVERE THUNDERSTORM ARE...
  MARION
  FAIRMOUNT
  GAS CITY

SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM WINDOWS.  SEVERE
THUNDERSTORMS PRODUCE DESTRUCTIVE HAIL AND DAMAGING WINDS.

MES/JM

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 Aug 24, 1:20 PM EST, 3 hours 29 minutes earlier.

Area forecast discussion, Aug 24, 1:20 PM EST, 3 hours 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
120 PM EST MON AUG 24 1998

FORECAST CONCERN OVERNIGHT IS SEVERE WEATHER/HEAVY PRECIP THREAT..

KLOT RADAR INDICATING RATHER STRONG THUNDERSTORM COMPLEX ACROSS NCNTRL
ILLINOIS WORKING QUICKLY EASTWARD.  COMPLEX SHOULD AFFECT NORTHERN HALF
OF OUR FORECAST AREA THROUGH THE LATE AFTERNOON AND EARLY EVENING
HOURS.  EVEN THOUGH CLOUD COVER HAS KEPT TEMPS AT BAY... LATEST ADAS
SHOWING CAPE VALUES OVER 3000 J/KG FOR THE ENTIRE FORECAST AREA.  VWP
INDICATING FAVORABLE WINDS FOR DAMAGING WINDS.. AND EXPECT COMPLEX TO
MAINTAIN ITS INTENSITY.

ETA/NGM BOTH SUGGESTING AT MCS DEVELOPMENT LATER TONIGHT OVER EASTERN
IOWA.. WITH THICKNESS FIELDS INDICATING MOVEMENT TOWARD NORTHERN
INDIANA.  MID LEVEL WINDS REMAIN QUITE FAVORABLE FOR STRONG WIND GUSTS
THROUGH THE NIGHT...AND WOULD REALLY LIKE TO SEE MENTION OF SEVERE ALL
NIGHT IN THE ZONES.  THICKNESS DIFFLUENCE ACROSS THE AREA COMBINED WITH
PWAT VALUES OVER 1.6 INCHES AND A STRONG THETA-E RIDGE ACROSS THE AREA
LEAD ME TO RECOMMEND MENTION OF HEAVY RAINFALL IN THE FORECAST AS WELL.

CHANCE POPS PROBABLY IN ORDER FOR WESTERN HALF OF FA TOMORROW.. SURFACE
FRONT APPROACHING AROUND MIDDAY SHOULD FINALLY BRING AN END TO PRECIP
THREAT.  SLIGHTLY HIGHER POPS IN ORDER FOR EASTERN HALF OF AREA AS
MODEL SOUNDINGS SUGGEST ENOUGH INSTABILITY FOR THUNDERSTORMS.

LATER PERIODS OF FORECAST APPEAR QUIET.

FWC/FAN TEMPS DIFFER A BIT&...ESPECIALLY IN LATER PERIODS.  BEST GUESS
AT THIS POINT IS A COMPROMISE BETWEEN THE TWO.

SBN 070/080 060/082 059 09830
FWA 071/086 062/084 060 09740
AOH 071 087 063/085 061 09741

.IWX...NONE.

MARGRAF!

In the hours before

Local storm report, Aug 24, 4:10 PM EST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
410 PM EST MON AUG 24 1998

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

0405 PM    CHURUBUSCO                IN    WIND DAMAGE
08/24/98   WHITLEY                         TREE FELL INTO A
                                           HOUSE...CAR HIT BY TREE

Local storm report, Aug 24, 4:10 PM EST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
410 PM EST MON AUG 24 1998

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

0405 PM    CHURUBUSCO                IN    WIND DAMAGE
08/24/98   WHITLEY                         TREE FELL INTO A
                                           HOUSE...CAR HIT BY TREE

Local storm report, Aug 24, 4:13 PM EST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
413 PM EST MON AUG 24 1998

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

0411 PM    HELMER                    IN    60 MPH TSTM GUST
08/24/98   STEUBEN

Local storm report, Aug 24, 4:13 PM EST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
413 PM EST MON AUG 24 1998

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

0411 PM    HELMER                    IN    60 MPH TSTM GUST
08/24/98   STEUBEN

Local storm report, Aug 24, 4:30 PM EST, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
430 PM EST MON AUG 24 1998

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

0414 PM    TOPEKA                    IN    WIND DAMAGE
08/24/98   LAGRANGE                        NUMEROUS TREES DOWN

0414 PM    WOLCOTTVILLE              IN    WIND DAMAGE
08/24/98   NOBLE                           NUMEROUS TREES DOWN

0414 PM    KENDALLVILLE              IN    WIND DAMAGE
08/24/98   NOBLE                           TREES DOWN IN
                                           KENDALLVILLE AND
                                           THROUGHOUT NOBLE COUNTY

0414 PM    FT WAYNE                  IN    WIND DAMAGE
08/24/98   ALLEN                           TREES AND POWER LINES
                                           DOWN...TREE FELL ON CAR

Local storm report, Aug 24, 4:30 PM EST, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
430 PM EST MON AUG 24 1998

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

0414 PM    TOPEKA                    IN    WIND DAMAGE
08/24/98   LAGRANGE                        NUMEROUS TREES DOWN

0414 PM    WOLCOTTVILLE              IN    WIND DAMAGE
08/24/98   NOBLE                           NUMEROUS TREES DOWN

0414 PM    KENDALLVILLE              IN    WIND DAMAGE
08/24/98   NOBLE                           TREES DOWN IN
                                           KENDALLVILLE AND
                                           THROUGHOUT NOBLE COUNTY

0414 PM    FT WAYNE                  IN    WIND DAMAGE
08/24/98   ALLEN                           TREES AND POWER LINES
                                           DOWN...TREE FELL ON CAR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 4:17 AM EST	Tornado Warning	IWX	Steuben	48 min
Aug 24, 5:04 AM EST	Severe Thunderstorm Warning	IWX	Steuben	46 min
Aug 24, 2:31 PM EST	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph, Starke	64 min
Aug 24, 3:03 PM EST	Severe Thunderstorm Warning	IWX	Elkhart, Marshall	62 min
Aug 24, 3:15 PM EST	Severe Thunderstorm Warning	IWX	Fulton, Kosciusko	50 min
Aug 24, 3:15 PM EST	Severe Thunderstorm Warning	IWX	Pulaski	50 min
Aug 24, 3:31 PM EST	Severe Thunderstorm Warning	IWX	LaGrange	49 min
Aug 24, 3:31 PM EST	Severe Thunderstorm Warning	IWX	Noble	49 min
Aug 24, 3:47 PM EST	Severe Thunderstorm Warning	IWX	Wabash, Whitley	48 min
Aug 24, 3:47 PM EST	Severe Thunderstorm Warning	IWX	Miami	48 min
Aug 24, 3:53 PM EST	Severe Thunderstorm Warning	IWX	DeKalb, Steuben	47 min
Aug 24, 3:59 PM EST	Severe Thunderstorm Warning	IWX	Allen, Huntington	46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.