Alert archive / Arkansas / Mesoscale Discussions in 2012

Mesoscale Discussion 1030

June 3, 201231 counties in Arkansas; Adair County, Cherokee County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2012, 2:27 PM CDT for 31 counties in Arkansas; Adair County, Cherokee County, Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 3, 2012, 2:27 PM CDT (19:27 UTC)
Expired
Jun 3, 2012, 4:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 33 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Lee County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Monroe County, AR, Newton County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Searcy 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, Adair County, OK, Cherokee County, OK

The radar

The Little Rock radar (KLZK), 77 km from the middle of the area, began a volume at 19:29 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, 7.5 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 2012-06-03Temperature 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 2012-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939Sfc1 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
1767 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
162 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
Jun 3, 3:28 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 18 more6 hr
Jun 3, 5:02 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Carroll, Cleburne, Conway and 38 more88 min
Jun 2, 8:12 PM CDTMesoscale DiscussionSPCBeaver, Ellis, Harper, Roger Mills, Texas2 hr
Jun 2, 10:59 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 11 more4 hr
Jun 3, 1:23 AM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Garfield, Grant, Kay and 4 more67 min
Jun 3, 2:57 AM CDTMesoscale DiscussionSPCCleveland, Creek, Lincoln, McClain, Pawnee, Payne and 1 more33 min
Jun 3, 3:25 PM CDTMesoscale DiscussionSPCBeaver, Ellis, Harper, Roger Mills95 min
Jun 3, 6:40 PM CDTTornado WatchSPCAlfalfa, Beaver, Blaine, Canadian, Creek, Custer and 19 more3 hr

Nearby

Mesoscale Discussions in Arkansas, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion in 2012

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.