Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 34

January 25, 20044 counties in Alabama; Jefferson Parish, Orleans Parish, Saint Bernard Parish, Louisiana; 8 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jan 25, 2004, 10:08 AM CST for 4 counties in Alabama; Jefferson Parish, Orleans Parish, Saint Bernard Parish, Louisiana; 8 counties in Mississippi. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jan 25, 2004, 10:08 AM CST (16:08 UTC)
Expired: Jan 25, 2004, 12:45 PM CST
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Baldwin County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Jefferson Parish, LA, Orleans Parish, LA, Saint Bernard Parish, LA, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 88 km from the middle of the area, began a volume at 16:08 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.1 hours before the alert went out and 60 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: 60 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 906 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jan 24, 10:46 PM CST	Mesoscale Discussion	SPC	Sabine	89 min
Jan 25, 1:11 AM CST	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Avoyelles, Beauregard, Calcasieu and 15 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2004 Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Louisiana, 2004 Every mesoscale discussion in 2004

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.