Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 647

April 22, 20056 states

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2005, 3:09 AM CDT for 6 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2005, 3:09 AM CDT (08:09 UTC)
Expired
Apr 22, 2005, 4:15 AM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 74 counties

Clark County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lonoke County, AR, Mississippi County, AR, Montgomery County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Posey County, IN, Vanderburgh County, IN, Ballard County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, McCracken County, KY, Union County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Dyer County, TN, Lake County, TN, Obion County, TN

The radar

The Memphis radar (KNQA), 120 km from the middle of the area, began a volume at 08:10 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, 8.2 hours before the alert went out and 161 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 2005-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1345 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 2005-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
1345 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1563 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

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 21, 8:19 PM CDTMesoscale DiscussionSPCClay, Greene, Lawrence, Randolph86 min
Apr 21, 10:16 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more119 min
Apr 21, 11:50 PM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Crawford and 25 more6 hr
Apr 21, 8:03 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Franklin, Hamilton, Jefferson and 10 more87 min
Apr 21, 10:25 PM CDTMesoscale DiscussionSPCCalhoun, Jersey, Madison, Monroe, Randolph, Saint Clair65 min
Apr 22, 10:56 AM CDTMesoscale DiscussionSPCChristian, Clark, Clay, Coles, Crawford, Cumberland and 15 more94 min
Apr 22, 1:30 PM CDTSevere Thunderstorm WatchSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 19 more8 hr
Apr 22, 3:17 PM CDTMesoscale DiscussionSPCDearborn, Fayette, Franklin, Jay, Ohio, Randolph and 3 more88 min
Apr 22, 3:50 PM CDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Henry, Ohio, Ripley and 4 more7 hr
Apr 22, 5:11 PM CDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clark, Clay, Crawford and 36 more94 min
Apr 22, 5:36 AM CDTMesoscale DiscussionSPCAllen, Logan, Simpson, Todd84 min
Apr 21, 7:47 PM CDTMesoscale DiscussionSPCBarry, Barton, Camden, Cedar, Christian, Dade and 22 more88 min
Apr 21, 9:50 PM CDTMesoscale DiscussionSPCCaldwell, Carroll, Cass, Clay, Clinton, Daviess and 8 more55 min
Apr 21, 9:23 PM CDTMesoscale DiscussionSPCBedford, Benton, Cheatham, Davidson, Decatur, Dickson and 18 more97 min
Apr 22, 11:18 AM CDTMesoscale DiscussionSPCBlount, Sevier117 min
Apr 22, 2:49 PM CDTMesoscale DiscussionSPCBedford, Benton, Cannon, Carroll, Cheatham, Coffee and 27 more86 min
Apr 22, 3:35 PM CDTSevere Thunderstorm WatchSPCBedford, Benton, Cannon, Cheatham, Coffee, Davidson and 23 more5 hr
Apr 22, 5:17 PM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 23 more58 min
Apr 22, 5:40 PM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Clay and 24 more5 hr
Apr 22, 6:40 PM CDTMesoscale DiscussionSPCAnderson, Bedford, Bledsoe, Bradley, Campbell, Cannon and 30 more95 min

Nearby

Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Missouri, 2005Every mesoscale discussion in 2005

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.