Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 779, NWS Jackson, MS

October 7, 2008Catahoula Parish, Concordia Parish, Franklin Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Oct 7, 2008, 12:06 PM CDT for Catahoula Parish, Concordia Parish, Franklin Parish, Louisiana. It was in force for 39 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: Oct 7, 2008, 12:06 PM CDT (17:06 UTC)
Expired: Oct 7, 2008, 12:45 PM CDT
In force: 39 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Catahoula Parish, LA, Concordia Parish, LA, Franklin Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.1 hours before the alert went out and 230 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2713 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 474 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.2

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 7, 10:45 AM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Oct 7, 10:45 AM CDT, 1 hour 21 minutes before

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Hazardous weather outlook, Oct 7, 9:20 AM CDT, 2 hours 46 minutes before

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In the hours before

Local storm report, Oct 7, 9:02 AM CDT, 3 hours 4 minutes before

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Special weather statement, Oct 7, 11:28 AM CDT, 38 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 2:05 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	25 min
Oct 7, 2:16 AM CDT	Severe Thunderstorm Warning	JAN	Lowndes	59 min
Oct 7, 5:40 PM CDT	Severe Thunderstorm Warning	JAN	Grenada	50 min
Oct 7, 5:51 PM CDT	Tornado Warning	JAN	Grenada	24 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2008 Every severe thunderstorm warning in 2008

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.