Alert archive / Mississippi / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 68, NWS New Orleans, LA

April 4, 2008Jackson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 4, 2008, 8:11 PM CDT for Jackson County, Mississippi. 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: Apr 4, 2008, 8:11 PM CDT (01:11 UTC)
Expired: Apr 4, 2008, 8:50 PM CDT
In force: 39 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Jackson County, MS

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 01:14 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
Apr 4, 5:48 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.2 hours before the alert went out and 106 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: 1152 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.5

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 New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 4, 3:55 PM CDT, 4 hours 16 minutes earlier.

Area forecast discussion, Apr 4, 3:55 PM CDT, 4 hours 16 minutes before

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Hazardous weather outlook, Apr 4, 6:05 PM CDT, 2 hours 6 minutes before

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In the hours before

Special weather statement, Apr 4, 6:57 PM CDT, 1 hour 14 minutes before

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Special weather statement, Apr 4, 8:04 PM CDT, 7 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:35 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	24 min
Apr 5, 3:08 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Saint Charles	67 min
Apr 5, 3:23 AM CDT	Special Marine Warning	LIX		97 min
Apr 5, 3:37 AM CDT	Severe Thunderstorm Warning	LIX	Saint Bernard	38 min
Apr 5, 5:34 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	56 min
Apr 5, 6:52 AM CDT	Special Marine Warning	LIX		83 min
Apr 5, 6:59 AM CDT	Special Marine Warning	LIX		91 min
Apr 5, 7:49 AM CDT	Special Marine Warning	LIX		86 min
Apr 5, 8:57 AM CDT	Special Marine Warning	LIX		93 min
Apr 5, 9:01 AM CDT	Special Marine Warning	LIX		89 min
Apr 5, 2:18 AM CDT	Flash Flood Warning	LIX	Hancock, Harrison	6 hr
Apr 5, 2:47 AM CDT	River Flood Warning	LIX	Harrison	52 hr
Apr 5, 5:02 AM CDT	Flash Flood Warning	LIX	Jackson	4 hr
Apr 5, 7:18 AM CDT	River Flood Warning	LIX	Harrison	34 hr
Apr 5, 7:18 AM CDT	River Flood Warning	LIX	Harrison	27 hr
Apr 5, 12:16 PM CDT	River Flood Warning	LIX	Harrison	9 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 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; radar from the NEXRAD Level II archive.