Alert archive / Louisiana / Flash Flood Warnings in 1993

Flash Flood Warning 20, NWS New Orleans, LA

January 20, 1993Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jan 20, 1993, 11:14 PM CST for Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jan 20, 1993, 11:14 PM CST (05:14 UTC)
Expired
Jan 21, 1993, 3:15 AM CST
In force
4 hr
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Tangipahoa Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.2 hours before the alert went out and 74 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 00:00Z on 1993-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 00:00Z on 1993-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 431 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
334 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
518 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
431 m²/s²
0-3 km storm-relative helicity
463 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

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.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 20, 6:36 PM CSTFlash Flood WarningLIXSaint Martin4 hr
Jan 20, 6:36 PM CSTFlash Flood WarningLIXTangipahoa, Washington4 hr
Jan 20, 9:44 PM CSTFlash Flood WarningLIXSaint Tammany3 hr
Jan 20, 10:54 PM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington66 min
Jan 21, 12:43 AM CSTFlash Flood WarningLIXSaint Tammany3 hr

Nearby

Flash Flood Warnings in Louisiana, 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.