Alert archive / Mississippi / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 190, NWS Jackson, MS

April 13, 2009Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 13, 2009, 7:23 PM CDT for Lamar County, Marion County, Mississippi. 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: Apr 13, 2009, 7:23 PM CDT (00:23 UTC)
Expired: Apr 13, 2009, 7:49 PM CDT
In force: 26 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Lamar County, MS, Marion County, MS

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 13, 4:16 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.4 hours before the alert went out and 108 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: 1479 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1178 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.7

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 Apr 13, 3:03 PM CDT, 4 hours 20 minutes earlier.

Area forecast discussion, Apr 13, 3:03 PM CDT, 4 hours 20 minutes before

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Hazardous weather outlook, Apr 13, 1:21 PM CDT, 6 hours 2 minutes before

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In the hours before

Special weather statement, Apr 13, 5:58 PM CDT, 1 hour 25 minutes before

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Special weather statement, Apr 13, 6:01 PM CDT, 1 hour 22 minutes before

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Local storm report, Apr 13, 6:28 PM CDT, 55 minutes before

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Special weather statement, Apr 13, 6:35 PM CDT, 48 minutes before

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Local storm report, Apr 13, 6:53 PM CDT, 30 minutes before

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Special weather statement, Apr 13, 6:57 PM CDT, 26 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
Apr 13, 7:34 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Lamar	29 min
Apr 13, 7:41 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	34 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.