Alert archive / Arkansas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 382, NWS Jackson, MS

June 11, 2009Morehouse Parish, Louisiana; Ashley County, Chicot County, Arkansas

NWS Jackson, MS issued this severe thunderstorm warning at Jun 11, 2009, 1:05 AM CDT for Morehouse Parish, Louisiana; Ashley County, Chicot County, Arkansas. It was in force for 55 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: Jun 11, 2009, 1:05 AM CDT (06:05 UTC)
Expired: Jun 11, 2009, 2:00 AM CDT
In force: 55 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Ashley County, AR, Chicot County, AR, Morehouse Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 178 km from the middle of the area, began a volume at 06:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 10, 11:49 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.1 hours before the alert went out and 210 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: 1677 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.7

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 Jun 10, 10:31 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jun 10, 10:31 PM CDT, 2 hours 34 minutes before

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Hazardous weather outlook, Jun 10, 10:45 PM CDT, 2 hours 20 minutes before

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In the hours before

Special weather statement, Jun 11, 12:53 AM CDT, 12 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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Nearby

Severe Thunderstorm Warnings in Arkansas, 2009 Severe Thunderstorm Warnings in Louisiana, 2009 Every severe thunderstorm warning in 2009

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; radar from the NEXRAD Level II archive.