Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 848

May 8, 200314 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 11:59 AM CDT for 14 counties in Arkansas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 8, 2003, 11:59 AM CDT (16:59 UTC)
Expired: May 8, 2003, 2:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Clay County, AR, Cleburne County, AR, Craighead County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR

The radar

The Little Rock radar (KLZK), 131 km from the middle of the area, began a volume at 16:58 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 12:00Z, 5.0 hours before the alert went out and 200 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: 2233 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.4

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
May 8, 1:18 AM CDT	Mesoscale Discussion	SPC	Benton, Garland, Grant, Hot Spring, Lincoln, Montgomery and 2 more	3 hr
May 8, 1:55 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll	5 hr
May 8, 5:02 AM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Howard, Johnson, Logan, Madison and 8 more	2 hr
May 8, 6:20 AM CDT	Tornado Watch	SPC	Crawford, Franklin, Logan, Montgomery, Scott, Sebastian and 1 more	3 hr
May 8, 7:33 AM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Johnson, Logan, Montgomery, Scott and 2 more	87 min
May 8, 8:25 AM CDT	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Craighead, Crittenden and 18 more	5 hr
May 8, 9:55 AM CDT	Mesoscale Discussion	SPC	Mississippi	3 hr
May 8, 10:21 AM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Craighead, Greene, Independence, Izard and 8 more	84 min
May 8, 10:25 AM CDT	Tornado Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 3 more	6 hr
May 8, 12:24 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 2 more	2 hr
May 8, 5:31 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Johnson, Logan and 4 more	59 min
May 8, 5:45 PM CDT	Tornado Watch	SPC	Benton, Crawford, Sebastian, Washington	5 hr
May 8, 6:38 PM CDT	Mesoscale Discussion	SPC	Benton, Crawford, Washington	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2003 Every mesoscale discussion in 2003

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.