Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 1047

May 28, 20057 parishes in Louisiana

The Storm Prediction Center issued this mesoscale discussion at May 28, 2005, 10:25 PM CDT for 7 parishes in Louisiana. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
May 28, 2005, 10:25 PM CDT (03:25 UTC)
Expired
May 29, 2005, 12:00 AM CDT
In force
95 min
Issued by
the Storm Prediction Center

Counties Grant Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Winn Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.4 hours before the alert went out and 140 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, Lake Charles Mun, LA at 00:00Z on 2005-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 636 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, Lake Charles Mun, LA at 00:00Z on 2005-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.193958Sfc1 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
636 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1383 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
66 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 7:38 AM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Cameron and 23 more2 hr
May 29, 8:00 AM CDTSevere Thunderstorm WatchSPCAcadia, Ascension, Assumption, Avoyelles, East Baton Rouge, East Feliciana and 22 more8 hr
May 29, 10:48 AM CDTMesoscale DiscussionSPCAscension, Catahoula, Concordia, East Baton Rouge, East Feliciana, Livingston and 12 more87 min
May 29, 12:40 PM CDTSevere Thunderstorm WatchSPCEast Carroll, Madison, West Carroll7 hr
May 29, 4:45 PM CDTSevere Thunderstorm WatchSPCAllen, Avoyelles, Beauregard, Catahoula, Concordia, East Baton Rouge and 17 more7 hr
May 29, 6:20 PM CDTMesoscale DiscussionSPCAllen, Avoyelles, Beauregard, Catahoula, Concordia, East Baton Rouge and 20 more85 min

Nearby

Mesoscale Discussions in Louisiana, 2005Every mesoscale discussion in 2005

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.