Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 643

April 24, 200623 counties in Arkansas; LeFlore County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2006, 6:08 PM CDT for 23 counties in Arkansas; LeFlore County, Oklahoma. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Apr 24, 2006, 6:08 PM CDT (23:08 UTC)
Expired
Apr 24, 2006, 7:15 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 24 counties

Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Lonoke County, AR, Montgomery County, AR, Perry County, AR, Polk County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Yell County, AR, LeFlore County, OK

The radar

The Little Rock radar (KLZK), 72 km from the middle of the area, began a volume at 23:11 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

Springfield, MO (KSGF), launched 12:00Z, 11.1 hours before the alert went out and 208 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2006-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2006-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 204 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1281 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
204 m²/s²
0-3 km storm-relative helicity
374 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Apr 24, 12:32 PM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Madison, Washington5 hr
Apr 24, 2:14 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 24 more61 min
Apr 24, 2:29 PM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Cleburne, Conway, Crawford, Faulkner and 27 more5 hr
Apr 24, 1:27 AM CDTMesoscale DiscussionSPCAlfalfa, Craig, Garfield, Grant, Kay, Major and 5 more2 hr
Apr 24, 7:32 AM CDTMesoscale DiscussionSPCCreek, Kay, Kingfisher, Lincoln, Logan, Noble and 5 more88 min
Apr 24, 7:49 AM CDTSevere Thunderstorm WatchSPCCraig, Creek, Kay, Mayes, Noble, Nowata and 7 more5 hr
Apr 24, 11:08 AM CDTMesoscale DiscussionSPCCreek, Kay, Mayes, Noble, Nowata, Osage and 5 more97 min
Apr 24, 1:13 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 11 more2 hr
Apr 24, 1:36 PM CDTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 27 more7 hr
Apr 24, 3:09 PM CDTMesoscale DiscussionSPCAlfalfa, Garfield66 min
Apr 24, 5:30 PM CDTSevere Thunderstorm WatchSPCAdair, Cherokee, Craig, Creek, Delaware, McIntosh and 11 more7 hr
Apr 24, 6:17 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 19 more88 min

Nearby

Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Oklahoma, 2006Every mesoscale discussion in 2006

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.