Alert archive / Ohio / Flash Flood Warnings in 1998

Flash Flood Warning 36, NWS Northern Indiana

August 24, 1998Fulton County, Henry County, Williams County, Ohio

NWS Northern Indiana issued this flash flood warning at Aug 24, 1998, 7:50 AM EDT for Fulton County, Henry County, Williams County, Ohio. It was in force for 3 hr. 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 24, 1998, 7:50 AM EDT (11:50 UTC)
Expired: Aug 24, 1998, 10:50 AM EDT
In force: 3 hr
Issued by: NWS Northern Indiana
Area: Whole counties

Counties Fulton County, OH, Henry County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 121 km from the middle of the area, began a volume at 11:53 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 00:00Z, 11.8 hours before the alert went out and 152 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: 812 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1734 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFWA 241152
FFWFWA
OHC051-069-171-241450-

BULLETIN- EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
650 AM EST MON AUG 24 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* FLASH FLOOD WARNING FOR PEOPLE IN THE FOLLOWING LOCATIONS...
  EASTERN WILLIAMS COUNTY IN NORTHWESTERN OHIO
  SOUTHERN FULTON COUNTY IN NORTHWESTERN OHIO
  NORTHERN HENRY COUNTY IN NORTHWESTERN OHIO

* UNTIL 1050 AM EDT (950 AM EST)

* AT 745 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN FROM WEST JEFFERSON
  TO ARCHBOLD TO NAPOLEON....MOVING SOUTHEAST AT 20 MPH.

* DOPPLER RADAR INDICATED BETWEEN 2 AND 4 INCHES OF RAIN HAD FALLEN
  OVER THE LAST TWO HOURS FROM EASTERN WILLIAMS TO SOUTHERN FULTON
  AND NORTHERN HENRY COUNTY.  REDEVELOPMENT CONTINUED TO OCCUR ALONG
  THE WESTERN FLANK OF THESE STORMS AND TRACK ACROSS THESE SAME
  AREAS. A SPOTTER IN MONTPELIER REPORTED 1.93 INCHES OF RAIN IN A
  HALF HOUR WITHIN THIS LINE OF THUNDERSTORMS.

IF YOU ARE IN THESE AREAS... BE PREPARED TO MOVE TO HIGHER GROUND
IF FLASH FLOODING IS OBSERVED OR REPORTED. DO NOT DRIVE ACROSS
FLOODED ROADS!

TEH

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 24, 3:04 AM EDT, 4 hours 46 minutes earlier.

Area forecast discussion, Aug 24, 3:04 AM EDT, 4 hours 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
204 AM EST MON AUG 24 1998

06Z SFC ANALYSIS SHOWING FRONT DRAPED FROM E NE INTO N MI.  NOTHING
TO SPEAK OF FOR CONVECTION THIS AM IN WARM SECTOR.  WEAK TROF FROM
SE WI INTO SE IA HAD GENERATED A FEW SHOWERS LAST HR ACRS SOUTH END
OF LM BUT SO FAR UNIMPRESSIVE.  THIS AREA OF SHOWERS ON SOUTHERN
EDGE OF ONTARIO UPR TROF AXIS AND ALONG EDGE OF MID LVL CAP WHICH
SEEMS TO BE HOLDING THINGS IN CHECK EVEN THOUGHT FAIRLY IMPRESSIVE
LOW LVL CONVERGENCE SEEN IN THE 950-850 MB LVL THIS AM. TWO SW/S OF
NOTE...MOST ACTIVE BY FAR HAS BEEN THE ONE CROSSING ONTARIO THIS AM
WITH STRONGER SYS SEEN IN WATER VAPOR IN MT.

QUESTIONS THIS AM ARE MANY.

6Z ADAS CONT TO SHOW IMPRESSIVE INSTABILITY THIS AM ESP AHD OF WEAK
TROF AXIS IN IL WHERE MID 70 DEWPOINTS HAD POOLED.  ADAS SHOWING
BEST SFC CONV VCNTY OF W MI BACK INTO SE IA.  SEEMS EVEN WITH LOW LVL
JET IN PLACE JUST NOT ENOUGH CONV TO GET THINGS GOING IN FACE OF SUCH
WARM MID LVL TEMPS.  NGM DOES TRY TO DEVELOP SOMETHING ACRS S WI
INTO N IL THIS AM BUT FEEL MID LVL CAP WILL LIKELY HOLD UNTIL MT SW
AND COOLING ALOFT APPROACH THE FA LATER TONIGHT. ONLY FLY IN THIS
SCENARIO IS THE FACT THAT ETA HAS NO SFC CONVECTIVE INHIBITION
PROGGED BY 00Z TUE. BUT LYR MEAN 850-700MB OMEGA SHOWS DVM
ACRS THE FA BEHIND DEPARTING ONT SW AND PRIMARY FORCING BACK
WEST IN IA INVOF SFC LOW AND UPR TROF.  THIS ALL TRACK EASTWARD
OVERNIGHT WITH LIKELY POPS IN CURRENT ZONES SUPPORTED.

FRONT PROGGED TO DROP THRU FA ON TUE WITH ADDITIONAL CONVECTION
LIKELY DEPENDENT ON AMT OF INSOLATION.  WOULD STILL CARRY SMALL
CHC POP WITH FRONT AROUND AND SOME QUESTION ON BONNIE'S INFLUENCE
THEN.

TEMP,S NR PERSISTENCE XPC TODAY AND TONIGHT.  FAN LOOKS TOO COOL TUE
WITH MOS BETTER AND CLOSE TO ETA 2M TEMPS.

SBN 088/068 083/061 080 66263
FWA 090/069 086/061 081 66263
AOH 090/069 087/062 081 66255

.IWX...NONE.

TEH

In the hours before

Special weather statement, Aug 24, 6:46 AM EDT, 1 hour 4 minutes before

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-251100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTHERN INDIANA
546 AM EST MON AUG 24 1998

...SEVERE WEATHER POTENTIAL STATEMENT FOR EXTREME SOUTHWEST LOWER
MICHIGAN...NORTHWEST OHIO...AND MOST OF NORTHERN INDIANA.

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR NORTHEAST INDIANA...
SOUTH CENTRAL LOWER MICHIGAN AND NORTHWEST OHIO UNTIL 1100 AM
EST/NOON EDT...

SOME CITIES INCLUDED IN THIS WATCH INCLUDE FORT WAYNE...ANGOLA
...KENDALLVILLE...AUBURN...DEFIANCE...LIMA...COLDWATER AND STURGIS.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THESE STORMS THIS
MORNING.

THERE IS A SLIGHT RISK FOR SEVERE WEATHER ONCE AGAIN BY LATE
AFTERNOON ACROSS THE ENTIRE AREA. THIS SEVERE THREAT WILL LIKELY
INCREASE TONIGHT.

MAIN BELT OF WESTERLIES IS FORECAST TO SHIFT SOUTHWARD TODAY INTO
THE AREA AS AN UPPER RIDGE ACROSS THE SOUTHERN PLAINS RETROGRADES
INTO THE SOUTHWEST US. AN APPROACHING COLD FRONT FROM MICHIGAN
TO IOWA IGNITE SEVERE THUNDERSTORMS BY LATE AFTERNOON FROM
SOUTHERN WISCONSIN INTO CENTRAL IOWA. THESE STORMS WILL LIKELY
ORGANIZE INTO A SQUALL LINE AND MOVE FROM NORTHERN ILLINOIS INTO
NORTHWEST OHIO OVERNIGHT.

UNIDIRECTIONAL SPEED SHEAR...A VERY UNSTABLE AIRMASS AND COLD AIR
ALOFT ASSOCIATED WITH A POTENT UPPER LEVEL DISTURBANCE FAVORS
PRIMARILY DAMAGING WINDS AND LARGE HAIL WITH THESE STORMS.  AN
ISOLATED SUPERCELL CAPABLE OF PRODUCING TORNADOES IS POSSIBLE LATE
THIS AFTERNOON INTO THE EVENING.

STORM SPOTTER ACTIVATION MAY BE NEEDED BY LATE AFTERNOON BUT IS MORE
LIKELY THIS EVENING AND TONIGHT.

STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE COMMERCIAL
MEDIA OUTLET FOR THE LATEST INFORMATION CONCERNING THIS DEVELOPING
SEVERE WEATHER THREAT.

TEH

Special weather statement, Aug 24, 6:46 AM EDT, 1 hour 4 minutes before

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-251100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTHERN INDIANA
546 AM EST MON AUG 24 1998

...SEVERE WEATHER POTENTIAL STATEMENT FOR EXTREME SOUTHWEST LOWER
MICHIGAN...NORTHWEST OHIO...AND MOST OF NORTHERN INDIANA.

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR NORTHEAST INDIANA...
SOUTH CENTRAL LOWER MICHIGAN AND NORTHWEST OHIO UNTIL 1100 AM
EST/NOON EDT...

SOME CITIES INCLUDED IN THIS WATCH INCLUDE FORT WAYNE...ANGOLA
...KENDALLVILLE...AUBURN...DEFIANCE...LIMA...COLDWATER AND STURGIS.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THESE STORMS THIS
MORNING.

THERE IS A SLIGHT RISK FOR SEVERE WEATHER ONCE AGAIN BY LATE
AFTERNOON ACROSS THE ENTIRE AREA. THIS SEVERE THREAT WILL LIKELY
INCREASE TONIGHT.

MAIN BELT OF WESTERLIES IS FORECAST TO SHIFT SOUTHWARD TODAY INTO
THE AREA AS AN UPPER RIDGE ACROSS THE SOUTHERN PLAINS RETROGRADES
INTO THE SOUTHWEST US. AN APPROACHING COLD FRONT FROM MICHIGAN
TO IOWA IGNITE SEVERE THUNDERSTORMS BY LATE AFTERNOON FROM
SOUTHERN WISCONSIN INTO CENTRAL IOWA. THESE STORMS WILL LIKELY
ORGANIZE INTO A SQUALL LINE AND MOVE FROM NORTHERN ILLINOIS INTO
NORTHWEST OHIO OVERNIGHT.

UNIDIRECTIONAL SPEED SHEAR...A VERY UNSTABLE AIRMASS AND COLD AIR
ALOFT ASSOCIATED WITH A POTENT UPPER LEVEL DISTURBANCE FAVORS
PRIMARILY DAMAGING WINDS AND LARGE HAIL WITH THESE STORMS.  AN
ISOLATED SUPERCELL CAPABLE OF PRODUCING TORNADOES IS POSSIBLE LATE
THIS AFTERNOON INTO THE EVENING.

STORM SPOTTER ACTIVATION MAY BE NEEDED BY LATE AFTERNOON BUT IS MORE
LIKELY THIS EVENING AND TONIGHT.

STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE COMMERCIAL
MEDIA OUTLET FOR THE LATEST INFORMATION CONCERNING THIS DEVELOPING
SEVERE WEATHER THREAT.

TEH

Local storm report, Aug 24, 7:11 AM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
611 AM EST MON AUG 24 1998

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

0550 AM    MONTPELIER                OH    1 INCH HAIL
08/24/98   WILLIAMS

Local storm report, Aug 24, 7:11 AM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
611 AM EST MON AUG 24 1998

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

0550 AM    MONTPELIER                OH    1 INCH HAIL
08/24/98   WILLIAMS

Local storm report, Aug 24, 7:27 AM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
627 AM EST MON AUG 24 1998

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

0614 AM    ARCHBOLD                  OH    4.5 INCH HAIL
08/24/98   FULTON

Local storm report, Aug 24, 7:27 AM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
627 AM EST MON AUG 24 1998

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

0614 AM    ARCHBOLD                  OH    4.5 INCH HAIL
08/24/98   FULTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 5:27 AM EDT	Tornado Warning	IWX	Williams	48 min
Aug 24, 5:57 AM EDT	Severe Thunderstorm Warning	IWX	Fulton	63 min
Aug 24, 6:15 AM EDT	Severe Thunderstorm Warning	IWX	Williams	50 min
Aug 24, 6:48 AM EDT	Severe Thunderstorm Warning	IWX	Henry	62 min
Aug 24, 6:55 AM EDT	Severe Thunderstorm Warning	IWX	Williams	50 min
Aug 24, 7:15 AM EDT	Severe Thunderstorm Warning	IWX	Fulton	50 min
Aug 24, 7:45 AM EDT	Severe Thunderstorm Warning	IWX	Henry	45 min
Aug 24, 8:01 AM EDT	Severe Thunderstorm Warning	IWX	Putnam	49 min
Aug 24, 8:31 AM EDT	Severe Thunderstorm Warning	IWX	Henry	34 min
Aug 24, 5:11 PM EDT	Severe Thunderstorm Warning	IWX	Defiance, Paulding, Williams	49 min
Aug 24, 5:29 PM EDT	Severe Thunderstorm Warning	IWX	Van Wert	46 min
Aug 24, 5:46 PM EDT	Severe Thunderstorm Warning	IWX	Henry, Putnam	49 min
Aug 24, 5:46 PM EDT	Severe Thunderstorm Warning	IWX	Fulton	49 min
Aug 24, 6:09 PM EDT	Severe Thunderstorm Warning	IWX	Allen	51 min

Nearby

Flash Flood Warnings in Ohio, 1998 Every flash flood 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.