Alert archive / Indiana / Flash Flood Warnings in 1998

Flash Flood Warning 1, NWS Northern Indiana

April 9, 1998Allen County, Indiana

NWS Northern Indiana issued this flash flood warning at Apr 9, 1998, 11:32 AM EST for Allen County, Indiana. It was in force for 118 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
Apr 9, 1998, 11:32 AM EST (16:32 UTC)
Expired
Apr 9, 1998, 1:30 PM EST
In force
118 min
Issued by
NWS Northern Indiana
Area
Whole counties

County Allen County, IN

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.5 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 1998-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 228 joules per kilogram.LCLEL10008507005003002001001 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, Cncnati-Daytn, OH at 12:00Z on 1998-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -77 square meters per square second.19395878Sfc1 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
228 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
513 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-77 m²/s²
0-3 km storm-relative helicity
-87 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFWA 091649 COR
FFWFWA
INC003-091830-

BULLETIN- EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA...RESENT FOR WARNING POINT...
1132 AM EST THU APR 9 1998

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* FLASH FLOOD WARNING FOR PEOPLE IN THE FOLLOWING LOCATION...
  ALLEN COUNTY IN NORTHEASTERN INDIANA

* UNTIL 130 PM EST

* AT 1120 AM EST... NATIONAL WEATHER SERVICE DOPPLER RADAR
  CONTINUES TO SHOW A LARGE AREA OF HEAVY RAIN FROM OVER ALL OF
  ALLEN COUNTY... MOVING SLOWLY.

* DOPPLER RADAR CONTINUES TO INDICATE MODERATE TO HEAVY RAIN OVER
  MUCH OF NORTHEAST INDIANA AND NORTHWEST OHIO. RAINFALL ESTIMATES
  OVER ALLEN COUNTY HAVE BEEN UP TO 1.0 INCHES PER HOUR. THIS WILL
  CONTINUE TO CAUSE WIDESPREAD FLOODING ESPECIALLY IN AND AROUND THE
  FORT WAYNE AREA. PERSONS LIVING IN FLOOD PRONE AREAS OF THE MAUMEE
  AND ST MARYS RIVERS SHOULD WATCH FOR RAPIDLY RISING WATERS.

IF YOU ARE IN THESE AREAJS... BE PREPARED TO MOVE TO HIGHER GROUND.
DO NOT DRIVE ACROSS FLOODED ROADS!

JAL

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.

In the hours before

Special weather statement, Apr 9, 9:51 AM EST, 1 hour 41 minutes before
INZ009-017-018-025>027-032>034-OHZ004-015-016-024-025-091735-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
951 AM EST THU APR 9 1998

...AN URBAN AND SMALL STREAM ADVISORY REMAINS IN EFFECT FOR MUCH OF
NORTHWEST OHIO AND NORTHEAST INDIANA...

AN URBAN AND SMALL STREAM ADVISORY REMAINS IN EFFECT UNTIL 1205 PM
EST OR 105 PM EDT FOR THE FOLLOWING COUNTIES...

IN NORTHEAST INDIANA... DEKALB... WHITLEY... ALLEN... HUNTINGTON...
WELLS... ADAMS... GRANT... BLACKFORD... AND JAY.

IN NORTHWEST OHIO... DEFIANCE... PAULDING... PUTNAM... VAN WERT...
AND ALLEN.

HEAVY RAINFALL OVERNIGHT HAS RESULTED IN WIDESPREAD FLOODING OF
ROADWAYS AND REPORTS OF STREAMS RISING TO BANKFULL ACROSS MUCH OF
NORTHEAST INDIANA AND NORTHWEST OHIO.

RAINFALL AMOUNTS OF 1 INCH TO 1.75 INCHES HAVE BEEN
INDICATED BY RADAR IN DEFIANCE AND PAULDING COUNTIES IN OHIO
SINCE 600 AM EST OR 700 AM EDT... AS WELL AS IN THE INDIANA
COUNTIES OF ALLEN... DEKALB... HUNTINGTON... AND WABASH.

PERIODS OF HEAVY RAIN WILL CONTINUE THROUGH EARLY AFTERNOON
ACROSS PORTIONS OF NORTHEAST INDIANA AND NORTHWEST OHIO.
SOME LOCATIONS WILL RECEIVE ANOTHER 1 TO 2 INCHES OF RAIN.

PEOPLE IN THE ADVISORY AREA SHOULD BE PREPARED FOR FLOODING OF
ROADS AND RAPID RISES IN CREEK LEVELS.  BE PREPARED TO MOVE TO
HIGHER GROUND... SHOULD FLOODWATERS THREATEN.

JAH

Nearby

Flash Flood Warnings in Indiana, 1998Every 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.