Alert archive / Missouri / Mesoscale Discussions in 2008

Mesoscale Discussion 340

March 4, 20085 counties in Arkansas; 15 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2008, 4:22 AM CST for 5 counties in Arkansas; 15 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Mar 4, 2008, 4:22 AM CST (10:22 UTC)
Expired: Mar 4, 2008, 8:15 AM CST
In force: 4 hr
Issued by: the Storm Prediction Center

Counties Baxter County, AR, Fulton County, AR, Lawrence County, AR, Randolph County, AR, Sharp County, AR, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Oregon County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Shannon County, MO, Wayne County, MO

The radar

The St Louis radar (KLSX), 165 km from the middle of the area, began a volume at 10:25 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

Little Rock, AR (KLZK), launched 00:00Z, 10.4 hours before the alert went out and 274 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 472 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 374 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
Mar 3, 6:15 PM CST	Mesoscale Discussion	SPC	Crawford, Polk, Scott, Sebastian, Washington	6 hr
Mar 4, 1:25 AM CST	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Cleburne, Conway, Crawford and 24 more	4 hr
Mar 3, 7:31 PM CST	Mesoscale Discussion	SPC	Perry, Sainte Genevieve	5 hr

Nearby

Mesoscale Discussions in Missouri, 2008 Mesoscale Discussions in Arkansas, 2008 Every mesoscale discussion 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.