Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 649

April 25, 200618 counties in Arkansas; 4 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2006, 4:57 AM CDT for 18 counties in Arkansas; 4 counties in Oklahoma; 5 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 25, 2006, 4:57 AM CDT (09:57 UTC)
Expired
Apr 25, 2006, 7:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 27 counties

Clark County, AR, Cleveland 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, Lonoke County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pulaski County, AR, Saline County, AR, Sevier County, AR, Bryan County, OK, Choctaw County, OK, McCurtain County, OK, Pushmataha County, OK, Bowie County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 110 km from the middle of the area, began a volume at 10:00 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.0 hours before the alert went out and 279 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 2006-04-25Temperature 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 2006-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 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
2449 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
75 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
Apr 25, 1:03 AM CDTMesoscale DiscussionSPCBaxter, Cleburne, Conway, Faulkner, Independence, Izard and 15 more117 min
Apr 25, 1:11 AM CDTMesoscale DiscussionSPCPolk, Scott, Sebastian, Sevier64 min
Apr 25, 3:11 PM CDTMesoscale DiscussionSPCClay, Craighead, Fulton, Greene, Izard, Lawrence and 2 more64 min
Apr 25, 4:44 PM CDTSevere Thunderstorm WatchSPCBaxter, Clay, Cleburne, Craighead, Crittenden, Cross and 15 more6 hr
Apr 24, 8:27 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 21 more33 min
Apr 24, 8:43 PM CDTTornado WatchSPCAdair, Atoka, Carter, Cherokee, Cleveland, Coal and 33 more5 hr
Apr 24, 10:30 PM CDTMesoscale DiscussionSPCAdair, Atoka, Carter, Cherokee, Cleveland, Coal and 27 more90 min
Apr 25, 1:35 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Haskell and 13 more5 hr
Apr 25, 11:07 AM CDTMesoscale DiscussionSPCAngelina, Brazos, Cherokee, Grimes, Hardin, Houston and 19 more83 min
Apr 25, 1:35 PM CDTMesoscale DiscussionSPCAransas, Atascosa, Austin, Bandera, Bastrop, Bee and 41 more115 min
Apr 25, 3:05 PM CDTSevere Thunderstorm WatchSPCAransas, Atascosa, Austin, Bee, Brazoria, Calhoun and 37 more7 hr
Apr 25, 3:52 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Collin, Comanche and 35 more113 min

Nearby

Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Texas, 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.