Alert archive / Arkansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1100

June 5, 201119 counties in Arkansas; McCurtain County, Oklahoma; Bowie County, Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2011, 12:56 PM CDT for 19 counties in Arkansas; McCurtain County, Oklahoma; Bowie County, Texas. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Jun 5, 2011, 12:56 PM CDT (17:56 UTC)
Expired
Jun 5, 2011, 2:00 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 21 counties

Clark County, AR, Dallas County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Little River County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sevier County, AR, Yell County, AR, McCurtain County, OK, Bowie County, TX

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 5.9 hours before the alert went out and 205 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, Shreveport, LA at 12:00Z on 2011-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2857 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, Shreveport, LA at 12:00Z on 2011-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
2857 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1455 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
-5 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 5, 5:35 PM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller115 min
Jun 5, 6:13 PM CDTMesoscale DiscussionSPCChicot2 hr

Nearby

Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Texas, 2011Every mesoscale discussion in 2011

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.