Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 751

May 5, 200331 counties in Illinois; 40 counties in Indiana; City of Saint Louis, Missouri

The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 1:46 AM CDT for 31 counties in Illinois; 40 counties in Indiana; City of Saint Louis, Missouri. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 1:46 AM CDT (06:46 UTC)
Expired
May 5, 2003, 3:15 AM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 72 counties

Bond County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Dubois County, IN, Fountain County, IN, Gibson County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Pike County, IN, Putnam County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Washington County, IN, City of Saint Louis, MO

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.8 hours before the alert went out and 99 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, Lincoln, IL at 00:00Z on 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 408 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
5 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
434 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
408 m²/s²
0-3 km storm-relative helicity
531 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

405 
ACUS11 KWNS 050646
SWOMCD
SPC MCD 050646 
INZ000-ILZ000-MOZ000-050815-

MESOSCALE DISCUSSION 0751
NWS STORM PREDICTION CENTER NORMAN OK
0146 AM CDT MON MAY 05 2003

AREAS AFFECTED...E CENTRAL MO / CENTRAL IL...

CONCERNING...SEVERE THUNDERSTORM WATCH 241...

VALID 050646Z - 050815Z

SEVERE THREAT CONTINUES ACROSS THE ERN HALF OF WW.

SEVERE THREAT CONTINUES AHEAD OF PRE-FRONTAL LINE OF STORMS MOVING
ACROSS SERN MO / W CENTRAL IL ATTM WHERE 500 TO 1500 J/KG ELEVATED
INSTABILITY AND STRONG DEEP-LAYER WIND FIELD IS INDICATED.  

THREAT IS EXPECTED TO DECREASE AS STORMS MOVE EWD INTO MORE STABLE
AIRMASS OVER IND WHERE PRIOR CONVECTION OCCURRED.  ALTHOUGH NEW WW
ACROSS IND IS NOT ANTICIPATED ATTM...WE WILL CONTINUE TO MONITOR THE
NWD ADVECTION OF LOW-LEVEL MOISTURE...NOW AS FAR N AS EVV.

..GOSS.. 05/05/2003

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

ATTN...WFO...ILN...LMK...IWX...IND...PAH...ILX...LSX...

39938958 40148744 40568556 40038499 38288618 38158955
38309066

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 7:34 PM CDTMesoscale DiscussionSPCAlexander116 min
May 4, 8:05 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 73 more85 min
May 4, 9:26 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 2 more2 hr
May 4, 10:40 PM CDTTornado WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 14 more5 hr
May 4, 11:05 PM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 33 more5 hr
May 5, 1:20 AM CDTTornado WatchSPCAlexander, Massac, Pulaski6 hr
May 5, 1:30 AM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 16 more90 min
May 5, 3:41 AM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more34 min
May 5, 3:50 AM CDTTornado WatchSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more6 hr
May 5, 6:32 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more88 min
May 5, 9:19 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more56 min
May 5, 12:20 PM CDTTornado WatchSPCHardin7 hr
May 4, 11:37 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 5 more23 min
May 4, 11:45 PM CDTTornado WatchSPCClark, Crawford, Floyd, Harrison, Orange, Perry and 1 more5 hr
May 5, 2:31 AM CDTMesoscale DiscussionSPCCrawford, Floyd, Harrison89 min
May 5, 7:35 AM CDTTornado WatchSPCHarrison, Perry5 hr
May 5, 10:12 AM CDTMesoscale DiscussionSPCHarrison, Perry93 min
May 5, 11:59 AM CDTMesoscale DiscussionSPCHarrison, Perry61 min
May 5, 2:47 PM CDTMesoscale DiscussionSPCCrawford, Dubois, Floyd, Gibson, Harrison, Perry and 4 more118 min
May 5, 4:27 PM CDTMesoscale DiscussionSPCSteuben3 hr
May 5, 4:42 PM CDTMesoscale DiscussionSPCOhio3 hr
May 5, 6:33 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 6 more57 min
May 4, 7:19 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 18 more86 min
May 4, 9:05 PM CDTMesoscale DiscussionSPCBates, Benton, Boone, Caldwell, Carroll, Cass and 23 more85 min
May 4, 9:42 PM CDTMesoscale DiscussionSPCBarry, Barton, Camden, Carter, Cedar, Christian and 28 more93 min
May 5, 12:50 AM CDTTornado WatchSPCBarry, Carter, Cedar, Christian, Dade, Dallas and 21 more5 hr
May 5, 4:18 AM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Pemiscot, Ripley and 1 more57 min
May 5, 4:55 AM CDTTornado WatchSPCDunklin, Pemiscot6 hr
May 5, 1:05 PM CDTTornado WatchSPCDunklin3 hr
May 5, 2:35 PM CDTTornado WatchSPCNew Madrid, Pemiscot7 hr
May 5, 3:25 PM CDTTornado WatchSPCDunklin, Pemiscot7 hr
May 5, 5:18 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot117 min

Nearby

Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Missouri, 2003Every mesoscale discussion in 2003

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.