Alert archive / Missouri / Mesoscale Discussions in 2007

Mesoscale Discussion 576

April 25, 20075 states

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2007, 12:45 AM CDT for 5 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Apr 25, 2007, 12:45 AM CDT (05:45 UTC)
Expired
Apr 25, 2007, 2:15 AM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 26 counties

Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Alexander County, IL, Pulaski County, IL, Fulton County, KY, Bollinger County, MO, Butler County, MO, Carter County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Dyer County, TN, Lake County, TN, Lauderdale County, TN

The radar

The Memphis radar (KNQA), 128 km from the middle of the area, began a volume at 05:45 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

Little Rock, AR (KLZK), launched 00:00Z, 5.8 hours before the alert went out and 180 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, Little Rock, AR at 00:00Z on 2007-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 613 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, Little Rock, AR at 00:00Z on 2007-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 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
613 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.5

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 24, 7:33 PM CDTMesoscale DiscussionSPCBenton, Carroll, Clark, Crawford, Franklin, Hempstead and 15 more117 min
Apr 24, 9:10 PM CDTTornado WatchSPCBaxter, Boone, Clark, Cleburne, Conway, Dallas and 26 more4 hr
Apr 24, 10:05 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 4 more85 min
Apr 24, 10:07 PM CDTMesoscale DiscussionSPCLittle River, Miller, Sevier83 min
Apr 24, 10:35 PM CDTTornado WatchSPCHempstead, Howard, Lafayette, Little River, Miller, Nevada and 1 more5 hr
Apr 24, 10:53 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more3 hr
Apr 24, 11:58 PM CDTMesoscale DiscussionSPCClark, Dallas, Garland, Grant, Hempstead, Hot Spring and 15 more92 min
Apr 25, 2:10 AM CDTMesoscale DiscussionSPCColumbia, Union65 min
Apr 25, 12:30 PM CDTMesoscale DiscussionSPCBenton, Carroll, Washington60 min
Apr 25, 1:11 PM CDTSevere Thunderstorm WatchSPCBenton, Carroll8 hr
Apr 25, 2:46 PM CDTMesoscale DiscussionSPCBaxter, Boone, Conway, Crawford, Franklin, Johnson and 12 more59 min
Apr 25, 3:38 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more6 hr
Apr 25, 6:15 PM CDTMesoscale DiscussionSPCClark, Columbia, Lafayette, Nevada, Ouachita90 min
Apr 25, 6:38 PM CDTMesoscale DiscussionSPCBaxter, Boone, Cleburne, Conway, Faulkner, Fulton and 17 more97 min
Apr 24, 11:14 PM CDTMesoscale DiscussionSPCCass, Champaign, DeWitt, Douglas, Edgar, Ford and 14 more91 min
Apr 24, 7:53 PM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Boone, Caldwell, Callaway and 53 more97 min

Nearby

Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Tennessee, 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.