Alert archive / Mississippi / Flash Flood Warnings in 1997

Flash Flood Warning 42, NWS Memphis, TN

June 21, 1997Calhoun County, Mississippi

NWS Memphis, TN issued this flash flood warning at Jun 21, 1997, 12:51 AM CDT for Calhoun County, Mississippi. 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
Jun 21, 1997, 12:51 AM CDT (05:51 UTC)
Expired
Jun 21, 1997, 4:00 AM CDT
In force
3 hr
Issued by
NWS Memphis, TN
Area
Whole counties

County Calhoun County, MS

The radar

The Columbus AFB radar (KGWX), 93 km from the middle of the area, began a volume at 05:50 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 00:00Z, 5.9 hours before the alert went out and 114 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 00:00Z on 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3038 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, Little Rock, AR at 00:00Z on 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
3038 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1079 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMEM 210554
FFWMEM
MSC013-210900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
1251 AM CDT SAT JUN 21 1997

THE NATIONAL WEATHER SERVICE IN MEMPHIS TN HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEASTERN MISSISSIPPI

   ...SOUTHERN CALHOUN COUNTY
 
AT 1250 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS
WITH VERY HEAVY RAIN OVER SOUTHERN CALHOUN COUNTY..ESPECIALLY IN
THE CALHOUN CITY AREA. RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN
HAVE FALLEN SINCE 10 PM CDT. THE STORMS ARE NEARLY STATIONARY..AND
THE AREA COULD EASILY RECEIVE ANOTHER 1 TO 2 INCHES OF RAIN BEFORE
4 AM. THIS WOULD LIKELY PRODUCE FLOODING IN THE CALHOUN CITY AREA.

.DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY0.
MOVE TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 6:34 PM CDTFlash Flood WarningMEGAlcorn86 min

Nearby

Flash Flood Warnings in Mississippi, 1997Every flash flood warning in 1997

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.