Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 67, NWS New Orleans, LA

February 22, 1998Saint Charles Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Feb 22, 1998, 4:51 AM CST for Saint Charles Parish, Louisiana. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 22, 1998, 4:51 AM CST (10:51 UTC)
Expired
Feb 22, 1998, 5:50 AM CST
In force
59 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Saint Charles Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 22, 3:45 AM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.9 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 1998-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1399 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
166 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 22, 3:15 AM CSTSevere Thunderstorm WarningLIXTerrebonne30 min
Feb 22, 3:54 AM CSTSevere Thunderstorm WarningLIXLafourche, Terrebonne61 min
Feb 22, 3:54 AM CSTSevere Thunderstorm WarningLIXJefferson, Saint Charles61 min
Feb 22, 4:23 AM CSTSevere Thunderstorm WarningLIXPlaquemines62 min
Feb 22, 4:51 AM CSTSevere Thunderstorm WarningLIXJefferson, Orleans, Saint Bernard59 min
Feb 22, 5:08 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa62 min
Feb 22, 3:45 AM CSTSevere Thunderstorm WarningLIXJackson45 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm 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.