Alert archive / Indiana / Flash Flood Warnings in 1990

Flash Flood Warning 48, NWS Indianapolis, IN

August 18, 1990Miami County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Aug 18, 1990, 6:30 AM EST for Miami County, Indiana. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 18, 1990, 6:30 AM EST (11:30 UTC)
Expired
Aug 18, 1990, 9:30 AM EST
In force
3 hr
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Miami County, IN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 11.5 hours before the alert went out and 184 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, Dayton/James M C, OH at 00:00Z on 1990-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 joules per kilogram.LCLLFCEL10008507005003002001001 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, Dayton/James M C, OH at 00:00Z on 1990-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 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
82 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1144 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
43 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.

000 
TTAA00 KIND 181132
FFWIND
INC103-181430-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
630 AM EST SAT AUG 18 1990
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  930 AM EST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTH CENTRAL INDIANA
          ...MIAMI
 
VERY HEAVY RAIN FELL OVER MIAMI COUNTY OVERNIGHT AND EARLY THIS
MORNING. AT 630 AM RADAR SHOWED MORE THUNDERSTORMS WITH VERY HEAVY
RAIN FROM 10 MILES NORTH OF ROCHESTER TO 10 MILES NORTH OF PERU.
THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MPH.
 
STATE POLICE REPORTED WATER COVERED SOME STATE ROADS IN MIAMI COUNTY.
DO NOT DRIVE THROUGH FLOODED AREAS.
 
ALLSOPP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 10:12 PM ESTFlash Flood WarningINDLaPorte4 hr

Nearby

Flash Flood Warnings in Indiana, 1990Every flash flood warning in 1990

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.