Alert archive / Tennessee / Mesoscale Discussions in 2008

Mesoscale Discussion 155

February 5, 20085 states

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2008, 9:47 AM CST for 5 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Feb 5, 2008, 9:47 AM CST (15:47 UTC)
Expired
Feb 5, 2008, 11:15 AM CST
In force
88 min
Issued by
the Storm Prediction Center
All 67 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg 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, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 102 km from the middle of the area, began a volume at 15:48 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

Little Rock, AR (KLZK), launched 12:00Z, 3.8 hours before the alert went out and 169 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 12:00Z on 2008-02-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 654 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 12:00Z on 2008-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 250 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
654 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
250 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.8
Supercell composite
3.3

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
Feb 4, 9:21 PM CSTMesoscale DiscussionSPCClay, Fulton, Greene, Randolph, Sharp84 min
Feb 5, 6:39 AM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 32 more3 hr
Feb 5, 10:18 AM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more87 min
Feb 5, 11:16 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Bradley, Calhoun, Clark and 53 more89 min
Feb 5, 11:56 AM CSTTornado WatchSPCHoward, Little River, Miller, Sevier7 hr
Feb 5, 12:11 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Crittenden, Cross, Desha and 7 more94 min
Feb 5, 12:39 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 14 more7 hr
Feb 5, 2:08 PM CSTTornado Watch PDSSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more10 hr
Feb 5, 3:09 PM CSTTornado Watch PDSSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more9 hr
Feb 5, 3:17 PM CSTMesoscale DiscussionSPCBaxter, Boone, Carroll, Crawford, Franklin, Johnson and 9 more88 min
Feb 5, 3:36 PM CSTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleburne, Cleveland and 19 more84 min
Feb 5, 5:39 PM CSTMesoscale DiscussionSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more96 min
Feb 4, 6:20 PM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Clinton and 13 more85 min
Feb 4, 7:14 PM CSTSevere Thunderstorm WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 33 more6 hr
Feb 4, 9:44 PM CSTMesoscale DiscussionSPCCalhoun, Champaign, Christian, DeWitt, Douglas, Ford and 13 more91 min
Feb 5, 6:45 AM CSTMesoscale DiscussionSPCMassac2 hr
Feb 5, 4:46 PM CSTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Clinton, Coles and 17 more119 min
Feb 5, 7:07 AM CSTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 6 more6 hr
Feb 5, 5:26 PM CSTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 8 more5 hr
Feb 5, 5:15 PM CSTMesoscale DiscussionSPCBenton, Carroll, Chester, Crockett, Decatur, Dyer and 14 more2 hr

Nearby

Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Arkansas, 2008Every mesoscale discussion in 2008

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.