Alert archive / Louisiana / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 18, NWS New Orleans, LA

March 10, 2010Jefferson Parish, Lafourche Parish, Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 10, 2010, 7:34 PM CST for Jefferson Parish, Lafourche Parish, Plaquemines Parish, Louisiana. It was in force for 26 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
Mar 10, 2010, 7:34 PM CST (01:34 UTC)
Expired
Mar 10, 2010, 8:00 PM CST
In force
26 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

Counties Jefferson Parish, LA, Lafourche Parish, LA, Plaquemines Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.6 hours before the alert went out and 305 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, Jackson, MS at 00:00Z on 2010-03-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1268 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, Jackson, MS at 00:00Z on 2010-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
1268 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1282 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 6:41 PM CSTSpecial Marine WarningLIX94 min
Mar 10, 7:03 PM CSTSevere Thunderstorm WarningLIXLafourche, Terrebonne42 min
Mar 10, 7:09 PM CSTSpecial Marine WarningLIX36 min
Mar 10, 7:22 PM CSTSevere Thunderstorm WarningLIXPlaquemines53 min
Mar 10, 7:32 PM CSTSpecial Marine WarningLIX28 min
Mar 10, 7:32 PM CSTSevere Thunderstorm WarningLIXLafourche28 min
Mar 10, 7:51 PM CSTSpecial Marine WarningLIX24 min
Mar 10, 7:56 PM CSTSpecial Marine WarningLIX62 min
Mar 10, 8:02 PM CSTSpecial Marine WarningLIX58 min
Mar 10, 8:05 PM CSTSevere Thunderstorm WarningLIXAscension, Assumption, East Baton Rouge, Iberville, Saint James, West Baton Rouge40 min
Mar 10, 8:28 PM CSTSpecial Marine WarningLIX62 min
Mar 10, 8:30 PM CSTSevere Thunderstorm WarningLIXPlaquemines60 min
Mar 10, 9:23 PM CSTSpecial Marine WarningLIX82 min
Mar 11, 3:50 AM CSTMarine Dense Fog AdvisoryLIX5 hr
Mar 11, 4:12 AM CSTDense Fog AdvisoryLIXAssumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 6 more5 hr
Mar 11, 9:23 AM CSTMarine Dense Fog AdvisoryLIX97 min
Mar 11, 3:38 PM CSTMarine Dense Fog AdvisoryLIX15 hr
Mar 11, 3:43 PM CSTDense Fog AdvisoryLIXSaint Bernard, Saint John the Baptist12 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2010Every severe thunderstorm warning in 2010

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.