Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 2016

November 17, 20136 states

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2013, 11:57 AM CST for 6 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Nov 17, 2013, 11:57 AM CST (17:57 UTC)
Expired
Nov 17, 2013, 1:30 PM CST
In force
93 min
Issued by
the Storm Prediction Center
All 60 counties

Clay County, AR, Greene County, AR, Lawrence County, AR, Randolph County, AR, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Posey County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO, Carroll County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Obion County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 91 km from the middle of the area, began a volume at 17:58 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 (KBYH), launched 12:00Z, 6.0 hours before the alert went out and 272 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 2013-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 874 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 2013-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 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
874 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
461 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
1.7
Supercell composite
7.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

753 
ACUS11 KWNS 171757
SWOMCD
SPC MCD 171757 
INZ000-ILZ000-171930-

MESOSCALE DISCUSSION 2015
NWS STORM PREDICTION CENTER NORMAN OK
1157 AM CST SUN NOV 17 2013

AREAS AFFECTED...ERN IL...WRN IND

CONCERNING...TORNADO WATCH 561...562...

VALID 171757Z - 171930Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 561...562...CONTINUES.

SUMMARY...GREATEST NEAR-TERM SIGNIFICANT TORNADO RISK IS APPROACHING
THE I-55 AND I-57 CORRIDORS BETWEEN JOLIET AND KANKAKEE AND PERHAPS
THE SRN PORTIONS OF THE CHICAGOLAND METRO AREA.

DISCUSSION...AN INTENSE SUPERCELL OVER NWRN LIVINGSTON COUNTY IL HAS
HAD A TORNADO CYCLONE EVIDENT IN RADAR IMAGERY FOR NEARLY 50 MILES.
DOWNSTREAM ENVIRONMENT REMAINS SUPPORTIVE FOR A LONG-TRACK
SIGNIFICANT TORNADO GIVEN A SICKLE-CELL ENLARGED HODOGRAPH STRUCTURE
SAMPLED IN ILX VWP DATA AND SURFACE TEMPERATURES WARMING INTO THE
LOWER 70S IMMEDIATELY AHEAD OF THE BROKEN BAND OF SUPERCELLS.
ADDITIONAL LONG-TRACK/SIGNIFICANT TORNADOES MAY EVOLVE E/NEWD OUT OF
PERSISTENT SUPERCELLS CURRENTLY IN MCLEAN AND CHRISTIAN COUNTIES IN
CNTRL IL.

..GRAMS.. 11/17/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...IWX...IND...LOT...ILX...

LAT...LON   42158783 41638684 40918652 39768683 39518758 39408852
            39488899 39988899 41478854 41868812 42158783

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 16, 11:29 PM CSTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Fulton, Greene, Independence and 9 more61 min
Nov 17, 2:06 AM CSTMesoscale DiscussionSPCClay, Cleburne, Craighead, Crittenden, Cross, Greene and 15 more84 min
Nov 17, 10:17 AM CSTMesoscale DiscussionSPCClay, Fulton, Greene, Lawrence, Randolph, Sharp118 min
Nov 17, 10:43 AM CSTTornado WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more8 hr
Nov 17, 2:43 PM CSTMesoscale DiscussionSPCClay, Craighead, Greene62 min
Nov 17, 3:46 PM CSTMesoscale DiscussionSPCCraighead, Mississippi89 min
Nov 17, 7:47 AM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Carroll and 55 more88 min
Nov 17, 8:40 AM CSTTornado Watch PDSSPCAdams, Bond, Boone, Brown, Bureau, Calhoun and 77 more7 hr
Nov 17, 10:49 AM CSTMesoscale DiscussionSPCBond, Boone, Bureau, Calhoun, Cass, Champaign and 56 more86 min
Nov 17, 11:57 AM CSTMesoscale DiscussionSPCChampaign, Coles, Cook, DeWitt, Douglas, DuPage and 11 more93 min
Nov 17, 1:05 PM CSTMesoscale DiscussionSPCAlexander, Hamilton, Johnson, Massac, Pope, Pulaski and 4 more55 min
Nov 17, 1:13 PM CSTMesoscale DiscussionSPCClark, Crawford, Edgar, Edwards, Jasper, Lawrence and 3 more77 min
Nov 17, 10:01 AM CSTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Benton, Blackford, Boone and 56 more119 min
Nov 17, 10:20 AM CSTTornado Watch PDSSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 65 more9 hr
Nov 17, 1:34 PM CSTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Perry, Washington56 min
Nov 17, 1:58 PM CSTTornado WatchSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more6 hr
Nov 17, 2:51 PM CSTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Brown, Clay and 34 more84 min
Nov 17, 3:25 PM CSTTornado WatchSPCGreenup, Lewis, Mason, Robertson5 hr
Nov 17, 5:06 PM CSTMesoscale DiscussionSPCBracken, Campbell, Kenton, Mason54 min
Nov 17, 5:16 PM CSTMesoscale DiscussionSPCAdair, Bath, Boyd, Breathitt, Carter, Casey and 40 more59 min
Nov 16, 7:53 PM CSTMesoscale DiscussionSPCAdair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 16 more67 min
Nov 17, 4:30 PM CSTTornado WatchSPCBenton, Cheatham, Davidson, Dickson, Houston, Humphreys and 5 more4 hr

Nearby

Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Illinois, 2013Mesoscale Discussions in Kentucky, 2013Every mesoscale discussion in 2013

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.