Alert archive / Tennessee / Flash Flood Warnings in 2002

Flash Flood Warning 23, NWS Memphis, TN

May 25, 2002Shelby County, Tennessee

NWS Memphis, TN issued this flash flood warning at May 25, 2002, 6:42 PM CDT for Shelby County, Tennessee. It was in force for 93 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 25, 2002, 6:42 PM CDT (23:42 UTC)
Expired
May 25, 2002, 8:15 PM CDT
In force
93 min
Issued by
NWS Memphis, TN
Area
Counties, with a storm outline in the text

County Shelby County, TN

The radar

The Memphis radar (KNQA), 13 km from the middle of the area, began a volume at 23:44 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

Little Rock, AR (KLZK), launched 12:00Z, 11.7 hours before the alert went out and 53 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, Little Rock, AR at 12:00Z on 2002-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 829 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, Little Rock, AR at 12:00Z on 2002-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
829 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
63 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 
WGUS54 KMEG 252342
FFWMEM
TNC157-260115-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
639 PM CDT SAT MAY 25 2002

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLOOD WARNING FOR...
  NORTHWEST SHELBY COUNTY IN SOUTHWEST TENNESSEE

* UNTIL 815 PM CDT.

* AT 638 PM CDT...WEATHER RADAR INDICATED VERY HEAVY RAIN NEAR THE   
  SHELBY FOREST PARK. RADAR RAINFALL ETIMATES DURING THE PAST HOUR   
  WERE TWO TO TWO AND ONE-HALF INCHES.

* CITIES AFFECTED THROUGH 815 PM CDT INCLUDE...
  FRAYSER

.DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.

.STAY TUNED TO THIS NATIONAL WEATHER SERVICE BROADCAST FOR THE LATEST
UPDATES AND INFORMATION. TO REPORT FLOODING ONLY...CALL
1-800-432-0875.

LAT...LON 3540 8992 3517 8992 3516 9015 3541 9015

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 6:46 PM CDTFlash Flood WarningMEGShelby89 min
May 25, 6:57 PM CDTSevere Thunderstorm WarningMEGShelby33 min

Nearby

Flash Flood Warnings in Tennessee, 2002Every flash flood warning in 2002

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.