Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 245, NWS Northern Indiana

August 25, 1998Defiance County, Ohio

NWS Northern Indiana issued this severe thunderstorm warning at Aug 25, 1998, 3:33 AM EDT for Defiance County, Ohio. 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: Aug 25, 1998, 3:33 AM EDT (07:33 UTC)
Expired: Aug 25, 1998, 4:20 AM EDT
In force: 47 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Defiance County, OH

The radar

The Northern Indiana radar (KIWX), 101 km from the middle of the area, began a volume at 07:34 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
Aug 25, 1:00 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 7.6 hours before the alert went out and 178 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: 1480 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1317 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

350 
WUUS53 KIWX 250736 RRA
SVRFWA
OHC039-250820-

BULLETIN- EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
233 AM EST TUE AUG 25 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DEFIANCE COUNTY IN NORTHWESTERN OHIO

* UNTIL 420 AM EDT (320 AM EST)

* AT 332 AM EDT... DOPPLER RADAR AT NORTH WEBSTER INDICATED A
  SEVERE THUNDERSTORM 16 MILES NORTHWEST OF DEFIANCE OR 6 MILES
  WEST OF NEY MOVING EAST AT 45 MPH.

* SOME LOCATIONS IN THE PATH OF THIS SEVERE THUNDERSTORM ARE...
  SHERWOOD
  NEY
  DEFIANCE

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

TEH/JAL

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 25, 3:12 AM EDT, 21 minutes earlier.

Area forecast discussion, Aug 25, 3:12 AM EDT, 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
212 AM EST TUE AUG 25 1998

06Z SFC ANALYSIS SHOWING WAVE HAD DEVELOPED ALONG FRONT ACRS SE IA.
FEEL THIS WILL SLOW UP SOUTHWARD PUSH OF FRONT LATER TODAY ACRS FA.
CURRENT CONVECTIVE OUTFLOW MAKING SOME PROGRESS SOUTHWARD AND WILL
NEED TO BE WATCHED FOR DEVELOPMENTS LATER TODAY.

ADDITIONAL SVR ACRS PARTICULARLY SOUTHERN THIRD FA DEPENDENT
SOMEWHAT ON INSOLATION THIS AM.  WILL NEED TO WATCH SATELLITE TRENDS
UPSTREAM BUT FEEL FAIR CHANCE ALONG AND SOUTH OF A WINAMAC TO LIMA
LINE. AFTER FROPA THINGS MUCH QUIETER WITH HIGH PRESSURE BUILDING IN.
WILL NEED TO LOOK AT FOG THREAT TONIGHT WITH GOOD RADIATIONAL
COOLING SETUP AND WET GROUND.

GUIDANCE TEMPS LOOK PRETTY GOOD.

SBN 083/061 084/060 082 66400
FWA 087/061 084/059 083 66500
AOH 088/063 085/060 083 66600

.IWX...NONE.

TEH

In the hours before

Local storm report, Aug 25, 2:37 AM EDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
137 AM EST TUE AUG 25 1998

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

0136 AM    STURGIS                   MI    60 MPH TSTM GUST
08/25/98   ST.JOSEPH                       SPOTTER REPORT

Local storm report, Aug 25, 2:37 AM EDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
137 AM EST TUE AUG 25 1998

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

0136 AM    STURGIS                   MI    60 MPH TSTM GUST
08/25/98   ST.JOSEPH                       SPOTTER REPORT

Local storm report, Aug 25, 2:47 AM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
147 AM EST TUE AUG 25 1998

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

0135 AM    SOUTH BEND                IN    WIND DAMAGE
08/25/98   ST.JOSEPH                       TREES AND POWER LINES
                                           DOWN

0135 AM                              IN    WIND DAMAGE
08/25/98   ELKHART                         TREES AND POWER LINES
                                           DOWN THROUGHOUT COUNTY

Local storm report, Aug 25, 2:47 AM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
147 AM EST TUE AUG 25 1998

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

0135 AM    SOUTH BEND                IN    WIND DAMAGE
08/25/98   ST.JOSEPH                       TREES AND POWER LINES
                                           DOWN

0135 AM                              IN    WIND DAMAGE
08/25/98   ELKHART                         TREES AND POWER LINES
                                           DOWN THROUGHOUT COUNTY

Local storm report, Aug 25, 3:09 AM EDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
209 AM EST TUE AUG 25 1998

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

0205 AM                              MI    FLOOD
08/25/98   BRANCH                          WIDESPREAD MINOR
                                           FLOODING THROUGHOUT
                                           BRANCH COUNTY

Local storm report, Aug 25, 3:09 AM EDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
209 AM EST TUE AUG 25 1998

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

0205 AM                              MI    FLOOD
08/25/98   BRANCH                          WIDESPREAD MINOR
                                           FLOODING THROUGHOUT
                                           BRANCH COUNTY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 3:05 AM EDT	Severe Thunderstorm Warning	IWX	Williams	50 min
Aug 25, 3:24 AM EDT	Severe Thunderstorm Warning	IWX	Fulton	51 min
Aug 25, 3:43 AM EDT	Severe Thunderstorm Warning	IWX	Henry	47 min

Nearby

Severe Thunderstorm Warnings in Ohio, 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.