Alert archive / Indiana / Flash Flood Warnings in 1998

Flash Flood Warning 7, NWS Indianapolis, IN

April 16, 1998Martin County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Apr 16, 1998, 12:46 AM EST for Martin County, Indiana. It was in force for 4 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: Apr 16, 1998, 12:46 AM EST (05:46 UTC)
Expired: Apr 16, 1998, 5:00 AM EST
In force: 4 hr
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Martin County, IN

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.8 hours before the alert went out and 223 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: 426 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 190 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 KIND 160546
FFWIND
INC013-027-055-083-101-105-161000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1246 AM EST THU APR 16 1998

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 500 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL INDIANA

   ...BROWN COUNTY
   ...MONROE COUNTY

IN SOUTHWESTERN INDIANA

   ...DAVIESS COUNTY
   ...GREENE COUNTY
   ...KNOX COUNTY
   ...MARTIN COUNTY

STRONG THUNDERSTORMS CONTINUE TO PRODUCE VERY HEAVY RAIN WHICH
WAS CAUSING FLASH FLOODING THROUGHOUT THE WARNING AREA.  WATER
WAS COVERING MANY ROADWAYS AND MAKING THEM IMPASSIABLE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT
AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT
DRIVE THROUGH WATER OF UNKNOWN DEPTH.


CT

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 15, 7:32 PM EST	Severe Thunderstorm Warning	IND	Greene, Monroe	63 min
Apr 15, 8:55 PM EST	Tornado Warning	IND	Lawrence, Martin	50 min
Apr 15, 9:47 PM EST	Flash Flood Warning	IND	Daviess, Greene, Knox, Martin, Monroe	3 hr
Apr 15, 9:47 PM EST	Flash Flood Warning	IND	Brown	3 hr
Apr 15, 10:09 PM EST	Flash Flood Warning	IND	Bartholomew, Decatur, Jackson, Jennings	4 hr
Apr 15, 10:09 PM EST	Flash Flood Warning	IND	Lawrence	4 hr
Apr 16, 12:23 AM EST	Severe Thunderstorm Warning	IND	Lawrence	32 min
Apr 16, 12:46 AM EST	Flash Flood Warning	IND	Daviess, Greene, Knox	4 hr
Apr 16, 12:46 AM EST	Flash Flood Warning	IND	Brown, Monroe	4 hr
Apr 16, 12:51 AM EST	Severe Thunderstorm Warning	IND	Jackson	49 min
Apr 16, 12:59 AM EST	Flash Flood Warning	IND	Jackson, Lawrence	4 hr
Apr 16, 12:59 AM EST	Flash Flood Warning	IND	Bartholomew, Decatur, Jennings	4 hr
Apr 16, 1:34 AM EST	Severe Thunderstorm Warning	IND	Jennings	46 min

Nearby

Flash Flood Warnings in Indiana, 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.