Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 759

May 5, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 9:19 AM CDT for 4 states. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 9:19 AM CDT (14:19 UTC)
Expired
May 5, 2003, 10:15 AM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 51 counties

Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, Washington County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 75 km from the middle of the area, began a volume at 14:23 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

Nashville Metro, TN (KBNA), launched 12:00Z, 2.3 hours before the alert went out and 290 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, Nashville Metro, TN at 12:00Z on 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 616 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, Nashville Metro, TN at 12:00Z on 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 575 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
616 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
575 m²/s²
0-3 km storm-relative helicity
604 m²/s²
Significant tornado parameter
2.0
Supercell composite
12.6

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
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, 1:46 AM CDTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Clinton, Coles and 25 more89 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, 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 5, 4:18 AM CDTMesoscale DiscussionSPCAllen, Ballard, Barren, Butler, Caldwell, Calloway and 19 more57 min
May 5, 4:55 AM CDTTornado WatchSPCFulton6 hr
May 5, 9:35 AM CDTTornado WatchSPCCalloway, Fulton5 hr
May 5, 11:06 AM CDTMesoscale DiscussionSPCFulton114 min
May 5, 2:13 PM CDTMesoscale DiscussionSPCFulton62 min
May 5, 2:35 PM CDTTornado WatchSPCFulton7 hr
May 5, 5:15 PM CDTTornado WatchSPCBracken, Campbell, Grant, Greenup, Kenton, Lewis and 4 more5 hr
May 5, 6:47 PM CDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Campbell, Carter and 15 more88 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, 1:05 PM CDTTornado WatchSPCDunklin3 hr
May 5, 3:25 PM CDTTornado WatchSPCDunklin, Pemiscot7 hr
May 5, 5:18 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot117 min

Nearby

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