Alert archive / Mississippi / Mesoscale Discussions in 2005

Mesoscale Discussion 693

April 26, 200510 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2005, 11:05 AM CDT for 10 counties in Mississippi. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Apr 26, 2005, 11:05 AM CDT (16:05 UTC)
Expired: Apr 26, 2005, 1:00 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

Counties Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 16:04 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 76 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: 702 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

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
Apr 26, 6:37 AM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Covington, Forrest and 20 more	83 min
Apr 26, 7:40 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Amite, Claiborne, Clarke, Copiah, Covington and 28 more	8 hr
Apr 26, 1:54 PM CDT	Mesoscale Discussion	SPC	George, Greene, Hancock, Harrison, Jackson, Pearl River and 2 more	66 min

Nearby

Mesoscale Discussions in Mississippi, 2005 Every mesoscale discussion in 2005

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.