Alert archive / Mississippi / Flash Flood Warnings in 1993

Flash Flood Warning 5, NWS Jackson, MS

January 20, 1993Marion County, Walthall County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 20, 1993, 4:05 PM CST for Marion County, Walthall County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jan 20, 1993, 4:05 PM CST (22:05 UTC)
Expired
Jan 20, 1993, 7:00 PM CST
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Marion County, MS, Walthall County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.1 hours before the alert went out and 107 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, Slidell Radar S, LA at 12:00Z on 1993-01-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 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, Slidell Radar S, LA at 12:00Z on 1993-01-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 392 square meters per square second.19395878Sfc1 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
21 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
392 m²/s²
0-3 km storm-relative helicity
460 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jan 20, 3:57 PM CST, 8 minutes before
MSZALL-202200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
350 PM CST WED JAN 20 1993

...DISREGARD ERRONEOUS FLASH FLOOD WARNING FOR 921 AM ISSUED
   FOR FORREST AND LAMAR COUNTIES...

A FLASH FLOOD WARNING FOR FORREST AND LAMAR COUNTIES WAS
MISTAKENLY TRANSMITTED OVER THE NATIONAL WEATHER WIRE CIRCUIT.
PLEASE DISREGARD THIS PARTICULAR MESSAGE. FLASH FLOOD WARNINGS FOR
THESE COUNTIES MAY BE NECESSARY LATER THIS EVENIN.

CONDITIONS COULD GET WORSE THROUGH THE REMAINDER OF THE PREDAWN
HOURS...DURING THE DAY WEDNESDAY...AND WEDNESDAY NIGHT.  MORE HEAVY
RAINFALL AND A FEW SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE NEXT 24
HOURS.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 20, 9:21 AM CSTFlash Flood WarningJANForrest, Lamar3 hr
Jan 20, 4:05 PM CSTFlash Flood WarningJANLamar3 hr
Jan 20, 4:24 PM CSTFlash Flood WarningJANWilkinson6 hr
Jan 20, 4:31 PM CSTFlash Flood WarningJANAmite, Pike6 hr
Jan 20, 4:51 PM CSTFlash Flood WarningJANForrest6 hr

Nearby

Flash Flood Warnings in Mississippi, 1993Every flash flood warning in 1993

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.