Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 892

May 9, 200324 counties in Illinois; 42 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 8:40 PM CDT for 24 counties in Illinois; 42 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 8:40 PM CDT (01:40 UTC)
Expired
May 9, 2003, 10:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 66 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clinton County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Iroquois County, IL, Jasper County, IL, Logan County, IL, Macon County, IL, McLean County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN

The radar

The Lincoln radar (KILX), 129 km from the middle of the area, began a volume at 01:42 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

Davenport, (KDVN), launched 00:00Z, 1.7 hours before the alert went out and 283 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, Davenport, at 00:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Davenport, at 00:00Z on 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1901 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

633 
ACUS11 KWNS 100141
SWOMCD
SPC MCD 100140 
OHZ000-INZ000-ILZ000-100345-

MESOSCALE DISCUSSION 0892
NWS STORM PREDICTION CENTER NORMAN OK
0840 PM CDT FRI MAY 09 2003

AREAS AFFECTED...CENTRAL IL/CENTRAL-NRN IND

CONCERNING...TORNADO WATCH 324...

VALID 100140Z - 100345Z

THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THE NEXT SEVERAL HOURS
OVER CENTRAL IL INTO NRN IND...WITH ISOLATED TORNADOES...LARGE HAIL
AND DAMAGING WINDS LIKELY.

SURFACE MESOANALYSES SHOW THE WARM FRONT LIFTING NWD AND EXTENDS
FROM JUST SOUTH OF MKC ENEWD TO UIN AND THEN INTO NRN IND...WITH
NUMEROUS SEVERE STORMS DETECTED ALONG THE EXTENT OF THIS BOUNDARY.  
 THE AIR MASS REMAINS VERY UNSTABLE ALONG AND SOUTH OF THE WARM
FRONT...WITH DEEP LAYER SHEAR SUPPORTING SUPERCELLS.  LARGE HAIL/
DAMAGING WINDS WILL BE LIKELY...AND STORMS THAT DEVIATE FROM THE
MEAN FLOW WILL HAVE A GREATER TORNADO POTENTIAL. 

..PETERS.. 05/10/2003

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

ATTN...WFO...ILN...IWX...IND...LOT...ILX...LSX...

38438966 39888968 40538935 41328678 41748483 40258479

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 7:47 PM CDTMesoscale DiscussionSPCCalhoun, Greene, Morgan, Pike, Scott88 min
May 9, 10:04 PM CDTMesoscale DiscussionSPCAdams26 min
May 9, 10:40 PM CDTSevere Thunderstorm WatchSPCBrown, Cass, Champaign, DeWitt, Ford, Fulton and 22 more5 hr
May 10, 5:43 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, Fulton and 15 more92 min
May 10, 5:50 AM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more5 hr
May 10, 8:30 AM CDTTornado WatchSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 9 more6 hr
May 10, 9:25 AM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 14 more2 hr
May 10, 10:39 AM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Douglas and 5 more2 hr
May 10, 10:54 AM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Cass and 69 more66 min
May 10, 12:38 PM CDTMesoscale DiscussionSPCClay, Crawford, Jasper, Lawrence, Richland97 min
May 10, 3:17 PM CDTMesoscale DiscussionSPCHancock, Henderson, Mercer, Rock Island58 min
May 10, 3:50 PM CDTTornado WatchSPCBureau, Carroll, Fulton, Henderson, Henry, Jo Daviess and 14 more6 hr
May 10, 4:00 PM CDTTornado WatchSPCFranklin, Jackson, Perry, Randolph, Union5 hr
May 10, 4:48 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more87 min
May 10, 5:40 PM CDTTornado WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 21 more5 hr
May 10, 6:41 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 14 more64 min
May 10, 3:33 AM CDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clark, Crawford, Daviess and 41 more87 min
May 10, 11:00 AM CDTTornado WatchSPCBlackford, Dearborn, Delaware, Fayette, Franklin, Henry and 7 more5 hr
May 10, 1:04 PM CDTMesoscale DiscussionSPCBlackford, Dearborn, Delaware, Fayette, Franklin, Henry and 7 more86 min

Nearby

Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Illinois, 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; radar from the NEXRAD Level II archive.