Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 2013

September 22, 200644 counties in Arkansas; 6 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Sep 22, 2006, 5:58 PM CDT for 44 counties in Arkansas; 6 counties in Oklahoma. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Sep 22, 2006, 5:58 PM CDT (22:58 UTC)
Expired
Sep 22, 2006, 7:30 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 50 counties

Clark County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Monroe County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Sequoyah County, OK

The radar

The Little Rock radar (KLZK), 95 km from the middle of the area, began a volume at 23:01 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.0 hours before the alert went out and 216 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 2006-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 409 joules per kilogram.LCLLFCEL10008507005003002001001 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 2006-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 311 square meters per square second.1939587897Sfc1 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
409 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
642 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
311 m²/s²
0-3 km storm-relative helicity
363 m²/s²
Significant tornado parameter
0.8
Supercell composite
8.7

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
Sep 21, 7:50 PM CDTMesoscale DiscussionSPCClark, Franklin, Garland, Hot Spring, Howard, Logan and 7 more115 min
Sep 21, 7:58 PM CDTMesoscale DiscussionSPCBenton, Madison, Washington2 hr
Sep 21, 9:30 PM CDTTornado WatchSPCArkansas, Clark, Conway, Crawford, Faulkner, Franklin and 24 more8 hr
Sep 21, 11:25 PM CDTMesoscale DiscussionSPCClark, Conway, Crawford, Franklin, Garland, Hot Spring and 16 more2 hr
Sep 22, 4:08 AM CDTMesoscale DiscussionSPCArkansas, Clay, Cleburne, Conway, Craighead, Crittenden and 23 more67 min
Sep 22, 4:39 AM CDTTornado WatchSPCClay, Cleburne, Craighead, Crittenden, Cross, Fulton and 17 more5 hr
Sep 22, 8:35 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 53 more85 min
Sep 22, 9:10 AM CDTTornado Watch PDSSPCArkansas, Baxter, Boone, Clark, Clay, Cleburne and 46 more9 hr
Sep 22, 11:10 AM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Madison, Sebastian, Washington95 min
Sep 22, 12:06 PM CDTTornado Watch PDSSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more9 hr
Sep 22, 12:15 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Bradley, Calhoun, Carroll and 64 more90 min
Sep 22, 3:00 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Benton, Boone, Carroll, Clark and 58 more90 min
Sep 22, 6:29 PM CDTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Craighead, Fulton and 16 more7 hr

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.