Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 1998

September 21, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Sep 21, 2006, 7:58 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 21, 2006, 7:58 PM CDT (00:58 UTC)
Expired
Sep 21, 2006, 10:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 37 counties

Benton County, AR, Madison County, AR, Washington County, AR, Allen County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barry County, MO, Barton County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 24 km from the middle of the area, began a volume at 01:00 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 00:00Z, 1.0 hours before the alert went out and 167 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 00:00Z on 2006-09-22Temperature 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 00:00Z on 2006-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 382 square meters per square second.1939587897117Sfc1 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
1135 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
382 m²/s²
0-3 km storm-relative helicity
538 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.

IssuedProductOfficeCountiesLasted
Sep 21, 7:50 PM CDTMesoscale DiscussionSPCClark, Franklin, Garland, Hot Spring, Howard, Logan and 7 more115 min
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, 5:58 PM CDTMesoscale DiscussionSPCClark, Cleburne, Conway, Craighead, Crawford, Cross and 38 more92 min
Sep 22, 6:29 PM CDTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Craighead, Fulton and 16 more7 hr
Sep 22, 12:49 PM CDTMesoscale DiscussionSPCBollinger, Callaway, Cape Girardeau, Carter, Crawford, Dent and 23 more2 hr
Sep 22, 1:16 PM CDTTornado WatchSPCAudrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 31 more8 hr
Sep 22, 5:08 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 33 more2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Kansas, 2006Mesoscale Discussions in Missouri, 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.