Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 271

March 12, 200610 counties in Arkansas; 7 counties in Missouri; 17 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 12, 2006, 9:13 PM CST for 10 counties in Arkansas; 7 counties in Missouri; 17 counties in Oklahoma. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Mar 12, 2006, 9:13 PM CST (03:13 UTC)
Expired
Mar 12, 2006, 10:15 PM CST
In force
62 min
Issued by
the Storm Prediction Center
All 34 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Washington County, AR, Barry County, MO, Howell County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 110 km from the middle of the area, began a volume at 03:16 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, 3.2 hours before the alert went out and 78 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 2006-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1549 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 00:00Z on 2006-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 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
1549 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
1450 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
1.5
Supercell composite
13.0

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
Mar 12, 9:34 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Conway, Crawford and 17 more7 hr
Mar 12, 11:30 PM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 8 more2 hr
Mar 12, 11:53 PM CSTTornado WatchSPCHoward, Little River, Miller, Montgomery, Pike, Polk and 1 more6 hr
Mar 13, 2:44 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clay, Cleburne and 35 more91 min
Mar 13, 3:13 AM CSTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 37 more7 hr
Mar 13, 6:08 AM CSTMesoscale DiscussionSPCCrittenden, Mississippi, Poinsett97 min
Mar 13, 9:02 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Crittenden, Cross, Desha and 8 more58 min
Mar 12, 6:28 PM CSTMesoscale DiscussionSPCAdair, Audrain, Barton, Bates, Benton, Boone and 65 more92 min
Mar 12, 8:00 PM CSTMesoscale DiscussionSPCAdair, Audrain, Barton, Bates, Benton, Boone and 59 more90 min
Mar 12, 8:42 PM CSTTornado WatchSPCAdair, Audrain, Barry, Barton, Bates, Benton and 72 more7 hr
Mar 13, 12:35 AM CSTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Iron, Madison and 9 more85 min
Mar 13, 1:06 AM CSTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Madison, Mississippi and 8 more6 hr
Mar 12, 6:21 PM CSTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, McIntosh, Mayes and 8 more114 min
Mar 12, 8:45 PM CSTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Jefferson and 5 more3 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Arkansas, 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.