Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 2486

November 28, 20056 states

The Storm Prediction Center issued this mesoscale discussion at Nov 28, 2005, 12:43 AM CST for 6 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Nov 28, 2005, 12:43 AM CST (06:43 UTC)
Expired
Nov 28, 2005, 1:45 AM CST
In force
62 min
Issued by
the Storm Prediction Center
All 32 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Alexander County, IL, Fulton County, KY, Hickman County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Stoddard County, MO, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Dyer County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 31 km from the middle of the area, began a volume at 06:43 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, 6.7 hours before the alert went out and 79 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 2005-11-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 345 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 2005-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 377 square meters per square second.1939587897117Sfc1 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
345 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
89 kt
0-1 km storm-relative helicity
377 m²/s²
0-3 km storm-relative helicity
418 m²/s²
Significant tornado parameter
1.0
Supercell composite
3.2

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
Nov 27, 6:19 PM CSTTornado WatchSPCArkansas, Bradley, Clay, Cleveland, Craighead, Crittenden and 21 more8 hr
Nov 27, 11:44 PM CSTTornado WatchSPCAshley, Chicot6 hr
Nov 27, 8:09 PM CSTMesoscale DiscussionSPCAdams, Calhoun, Greene, Jersey, Madison, Monroe and 2 more2 hr
Nov 27, 8:28 PM CSTTornado WatchSPCCalhoun, Greene, Jersey, Madison, Monroe, Randolph and 1 more5 hr
Nov 27, 11:21 PM CSTMesoscale DiscussionSPCBond, Calhoun, Christian, Clinton, Fayette, Greene and 16 more84 min
Nov 27, 11:26 PM CSTTornado WatchSPCAlexander, Bond, Christian, Clark, Clay, Clinton and 37 more7 hr
Nov 28, 3:28 AM CSTMesoscale DiscussionSPCAlexander, Clark, Clay, Coles, Crawford, Cumberland and 29 more62 min
Nov 27, 8:44 PM CSTMesoscale DiscussionSPCCalloway, Carlisle, Fulton, Graves, Hickman91 min
Nov 28, 10:52 AM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 38 more113 min
Nov 28, 11:13 AM CSTTornado WatchSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 32 more7 hr
Nov 28, 2:17 PM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 56 more88 min
Nov 28, 2:40 AM CSTMesoscale DiscussionSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 25 more95 min
Nov 28, 4:42 AM CSTMesoscale DiscussionSPCAmite, Marion, Pike, Walthall, Wilkinson93 min
Nov 28, 9:29 AM CSTMesoscale DiscussionSPCClarke, Forrest, George, Greene, Harrison, Jackson and 11 more2 hr

Nearby

Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Mississippi, 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.