Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 2290

September 28, 200526 counties in Arkansas; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 28, 2005, 4:51 PM CDT for 26 counties in Arkansas; 19 counties in Missouri. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Sep 28, 2005, 4:51 PM CDT (21:51 UTC)
Expired: Sep 28, 2005, 6:15 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 45 counties

Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Lonoke County, AR, Mississippi County, AR, Perry County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Madison County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO

The radar

The Memphis radar (KNQA), 160 km from the middle of the area, began a volume at 21:52 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 823Sep 28, 5:30 PM CDT

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 9.9 hours before the alert went out and 202 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: 40 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 143 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
Sep 28, 2:59 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 12 more	61 min
Sep 28, 3:15 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 13 more	6 hr
Sep 28, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Clay, Cleburne, Conway, Craighead, Faulkner and 23 more	6 hr
Sep 28, 5:45 PM CDT	Mesoscale Discussion	SPC	Little River	2 hr
Sep 28, 6:09 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Cass, Cedar, Henry, Jackson and 6 more	2 hr
Sep 28, 11:56 AM CDT	Mesoscale Discussion	SPC	Audrain, Benton, Boone, Callaway, Camden, Clark and 23 more	94 min

Nearby

Mesoscale Discussions in Arkansas, 2005 Mesoscale Discussions in Missouri, 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.