Alert archive / Missouri / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 245

May 7, 200215 counties in Illinois; 37 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2002, 12:45 AM CDT for 15 counties in Illinois; 37 counties in Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 7, 2002, 12:45 AM CDT (05:45 UTC)
Expired
May 7, 2002, 6:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 52 counties

Bond County, IL, Calhoun County, IL, Christian County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Saint Clair County, IL, Sangamon County, IL, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Jefferson County, MO, Laclede County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 138 km from the middle of the area, began a volume at 05:48 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.

Warnings issued inside it

26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 7, 12:52 AM CDTSevere Thunderstorm WarningSGFSt. Clair53 min
May 7, 12:53 AM CDTFlash Flood WarningLSXAudrain, Boone, Callaway6 hr
May 7, 12:57 AM CDTSevere Thunderstorm WarningEAXPettis63 min
May 7, 1:02 AM CDTSevere Thunderstorm WarningILXSangamon43 min
May 7, 1:04 AM CDTSevere Thunderstorm WarningSGFBenton56 min
May 7, 1:13 AM CDTSevere Thunderstorm WarningEAXCooper62 min
May 7, 1:16 AM CDTFlash Flood WarningEAXCooper4 hr
May 7, 1:16 AM CDTSevere Thunderstorm WarningSGFMorgan59 min
May 7, 1:28 AM CDTSevere Thunderstorm WarningILXChristian47 min
May 7, 1:43 AM CDTSevere Thunderstorm WarningSGFCamden, Cedar, Hickory, St. Clair62 min
May 7, 1:49 AM CDTSevere Thunderstorm WarningILXMacon41 min
May 7, 1:52 AM CDTSevere Thunderstorm WarningSGFPolk53 min
May 7, 1:58 AM CDTSevere Thunderstorm WarningSGFMiller47 min
May 7, 2:08 AM CDTSevere Thunderstorm WarningSGFDallas, Laclede52 min
May 7, 2:09 AM CDTTornado WarningLSXCalhoun, Jersey51 min
May 7, 2:09 AM CDTFlash Flood WarningLSXLincoln, Montgomery5 hr
May 7, 2:23 AM CDTTornado WarningLSXSaint Charles52 min
May 7, 2:25 AM CDTSevere Thunderstorm WarningSGFMaries65 min
May 7, 2:29 AM CDTSevere Thunderstorm WarningSGFPulaski61 min
May 7, 2:41 AM CDTFlash Flood WarningILXCass, Christian, Logan, Macon, Menard, Morgan and 3 more6 hr
May 7, 2:41 AM CDTTornado WarningLSXMadison49 min
May 7, 2:56 AM CDTSevere Thunderstorm WarningSGFPhelps49 min
May 7, 3:00 AM CDTTornado WarningLSXMacoupin, Montgomery45 min
May 7, 3:01 AM CDTSevere Thunderstorm WarningSGFDallas, Laclede44 min
May 7, 3:58 AM CDTFlash Flood WarningLSXCalhoun, Greene, Jersey, Macoupin, Montgomery6 hr
May 7, 5:31 AM CDTFlash Flood WarningSGFMaries, Miller, Phelps, Pulaski6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.8 hours before the alert went out and 221 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, Springfield, MO at 00:00Z on 2002-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2395 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, Springfield, MO at 00:00Z on 2002-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 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
2395 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
1.5
Supercell composite
5.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 3:00 AM CDTSevere Thunderstorm WatchSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more5 hr
May 7, 3:45 AM CDTSevere Thunderstorm WatchSPCClark, Clay, Coles, Crawford, Cumberland, Edwards and 12 more5 hr
May 6, 10:00 PM CDTSevere Thunderstorm WatchSPCAudrain, Bates, Benton, Boone, Buchanan, Caldwell and 26 more6 hr
May 7, 3:00 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 16 more6 hr
May 7, 3:30 PM CDTSevere Thunderstorm WatchSPCAtchison5 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2002Severe Thunderstorm Watches in Illinois, 2002Every severe thunderstorm watch in 2002

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.