Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 706

April 29, 200518 counties in Arkansas; Tunica County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2005, 9:34 AM CDT for 18 counties in Arkansas; Tunica County, Mississippi. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Apr 29, 2005, 9:34 AM CDT (14:34 UTC)
Expired: Apr 29, 2005, 11:30 AM CDT
In force: 116 min
Issued by: the Storm Prediction Center

Counties Conway County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Lee County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Tunica County, MS

The radar

The Little Rock radar (KLZK), 33 km from the middle of the area, began a volume at 14:35 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 210Apr 29, 12:50 PM CDT

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 2.6 hours before the alert went out and 211 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1155 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 28, 7:39 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more	96 min
Apr 28, 9:51 PM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Cleburne, Craighead, Fulton, Greene and 11 more	84 min
Apr 29, 4:36 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Crawford and 15 more	114 min
Apr 29, 6:20 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Clay, Cleburne and 30 more	7 hr
Apr 29, 12:25 PM CDT	Mesoscale Discussion	SPC	Cleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 19 more	35 min
Apr 29, 12:50 PM CDT	Severe Thunderstorm Watch	SPC	Cleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 23 more	6 hr
Apr 29, 2:28 PM CDT	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 13 more	107 min
Apr 29, 3:35 PM CDT	Tornado Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more	7 hr
Apr 29, 3:40 PM CDT	Mesoscale Discussion	SPC	Cleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 11 more	2 hr
Apr 29, 6:04 PM CDT	Mesoscale Discussion	SPC	Craighead, Crittenden, Cross, Lee, Mississippi, Poinsett and 1 more	56 min
Apr 29, 6:29 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 16 more	91 min
Apr 29, 6:55 PM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Marshall	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2005 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.