Alert archive / Michigan / Flash Flood Warnings in 1998

Flash Flood Warning 3, NWS Detroit, MI

July 7, 1998Wayne County, Michigan

NWS Detroit, MI issued this flash flood warning at Jul 7, 1998, 11:55 PM EDT for Wayne County, Michigan. 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
Jul 7, 1998, 11:55 PM EDT (03:55 UTC)
Expired
Jul 8, 1998, 3:00 AM EDT
In force
3 hr
Issued by
NWS Detroit, MI
Area
Whole counties

County Wayne County, MI

The radar

The Detroit radar (KDTX), 49 km from the middle of the area, began a volume at 03:59 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, 3.9 hours before the alert went out and 50 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, Detroit, MI at 00:00Z on 1998-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2166 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, Detroit, MI at 00:00Z on 1998-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939587897117Sfc1 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
2166 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.8
Supercell composite
3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDTX 080355
FFWDTX
MIC163-080700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1155 PM EDT TUE JUL 7 1998

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WAYNE COUNTY IN SOUTHEASTERN LOWER MICHIGAN

* UNTIL 300 AM EDT

* AT 1150 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SHOWERS AND THUNDERSTORMS... SOME WITH HEAVY RAIN... IN SOUTHERN
  AND EASTERN WAYNE COUNTY... MOVING SLOWLY NORTHEAST.

* THE FLASH FLOOD WARNING FOR WAYNE COUNTY HAS BEEN EXTENDED UNTIL 3
  AM EDT. SHOWERS AND THUNDERSTORMS... SOME WITH HEAVY RAIN...
  CONTINUE TO MOVE THROUGH WAYNE COUNTY. THE DETROIT/PONTIAC DOPPLER
  RBADAR IS ESTIMATING OVER 4 INCHES OF RAIN IN THE VICINITY OF
  DETROIT METRO  AIRPORT AND MANY UNDERPASSES NEAR METRO AIRPORT ARE
  REPORTED CLOSED DUE TO STANDING WATER.

  DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

KEYES


&

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 9:07 PM EDTFlash Flood WarningDTXWayne3 hr
Jul 8, 2:57 AM EDTFlash Flood WarningDTXWayne3 hr

Nearby

Flash Flood Warnings in Michigan, 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; radar from the NEXRAD Level II archive.