Alert archive / Arkansas / Mesoscale Discussions in 2007

Mesoscale Discussion 425

April 3, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2007, 2:17 PM CDT for 4 states. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2007, 2:17 PM CDT (19:17 UTC)
Expired
Apr 3, 2007, 4:15 PM CDT
In force
118 min
Issued by
the Storm Prediction Center
All 90 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Cross County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lawrence County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dunklin County, MO, Pemiscot County, MO, Choctaw County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Gregg County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Western Arkansas radar (KSRX), 160 km from the middle of the area, began a volume at 19:17 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.3 hours before the alert went out and 285 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, Fort Worth, TX at 12:00Z on 2007-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1056 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, Fort Worth, TX at 12:00Z on 2007-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 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
1056 J/kg
Mixed-layer CIN
-363 J/kg
Mixed-layer LCL
1095 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
264 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 3, 11:04 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Craighead and 14 more26 min
Apr 3, 3:12 PM CDTTornado WatchSPCBaxter, Boone, Carroll, Clay, Cleburne, Conway and 39 more7 hr
Apr 3, 5:47 PM CDTSevere Thunderstorm WatchSPCClark, Garland, Hempstead, Hot Spring, Howard, Lafayette and 7 more7 hr
Apr 3, 6:15 PM CDTMesoscale DiscussionSPCCrittenden, Cross, Lee, Lonoke, Mississippi, Monroe and 5 more60 min
Apr 2, 8:05 PM CDTMesoscale DiscussionSPCAtchison, Harrison, Mercer, Nodaway, Putnam, Schuyler and 1 more115 min
Apr 2, 11:40 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, DeKalb, Gentry, Harrison and 3 more65 min
Apr 3, 12:03 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Clinton and 14 more7 hr
Apr 3, 2:22 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Clinton and 14 more53 min
Apr 3, 4:05 AM CDTMesoscale DiscussionSPCAdair, Clark, Knox, Lewis, Macon, Marion and 3 more55 min
Apr 3, 4:19 AM CDTSevere Thunderstorm WatchSPCClark, Knox, Lewis, Marion, Monroe, Pike and 3 more6 hr
Apr 3, 4:28 AM CDTMesoscale DiscussionSPCCarroll, Cass, Chariton, Clay, Cole, Cooper and 12 more62 min
Apr 3, 7:17 AM CDTMesoscale DiscussionSPCAudrain, Bates, Benton, Boone, Callaway, Camden and 30 more88 min
Apr 3, 7:37 AM CDTSevere Thunderstorm WatchSPCAudrain, Bates, Benton, Boone, Callaway, Camden and 30 more8 hr
Apr 3, 9:08 AM CDTMesoscale DiscussionSPCSaint Louis, City of Saint Louis67 min
Apr 3, 9:46 AM CDTMesoscale DiscussionSPCAudrain, Bates, Benton, Boone, Callaway, Camden and 37 more29 min
Apr 3, 11:51 AM CDTTornado WatchSPCBarry, Barton, Bollinger, Butler, Camden, Cape Girardeau and 50 more8 hr
Apr 3, 2:25 PM CDTMesoscale DiscussionSPCBarry, Bollinger, Butler, Cape Girardeau, Carter, Christian and 39 more65 min
Apr 3, 11:29 AM CDTMesoscale DiscussionSPCHardin, Jasper, Newton, Orange2 hr
Apr 3, 4:23 PM CDTMesoscale DiscussionSPCBosque, Brown, Comanche, Erath, Hamilton, Hood and 5 more3 hr
Apr 3, 5:10 PM CDTMesoscale DiscussionSPCBandera, Blanco, Gillespie, Kendall, Kerr, Llano and 1 more3 hr

Nearby

Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Oklahoma, 2007Every mesoscale discussion in 2007

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.