Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 648

April 25, 20064 counties in Arkansas; 15 counties in Oklahoma; Fannin County, Lamar County, Red River County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2006, 1:11 AM CDT for 4 counties in Arkansas; 15 counties in Oklahoma; Fannin County, Lamar County, Red River County, Texas. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Apr 25, 2006, 1:11 AM CDT (06:11 UTC)
Expired
Apr 25, 2006, 2:15 AM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 22 counties

Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Fannin County, TX, Lamar County, TX, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 117 km from the middle of the area, began a volume at 06:14 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

Norman, OK (KOUN), launched 00:00Z, 6.2 hours before the alert went out and 224 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, Norman, OK at 00:00Z on 2006-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2326 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, Norman, OK at 00:00Z on 2006-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.19395878Sfc1 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
2326 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.9

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, 4:57 AM CDTMesoscale DiscussionSPCClark, Cleveland, Dallas, Garland, Grant, Hempstead and 12 more2 hr
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 Oklahoma, 2006Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Texas, 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.