Alert archive / Missouri / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 175

April 28, 2003Carroll County, Arkansas; 9 counties in Illinois; 41 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Apr 28, 2003, 2:35 PM CDT for Carroll County, Arkansas; 9 counties in Illinois; 41 counties in Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 28, 2003, 2:35 PM CDT (19:35 UTC)
Expired
Apr 28, 2003, 8:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 51 counties

Carroll County, AR, Alexander County, IL, Clinton County, IL, Jackson County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Bollinger County, MO, Butler County, MO, Camden County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, Crawford County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Mississippi County, MO, Oregon County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 138 km from the middle of the area, began a volume at 19:38 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

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

IssuedProductOfficeCountiesLasted
Apr 28, 2:38 PM CDTSevere Thunderstorm WarningSGFWright52 min
Apr 28, 2:45 PM CDTSevere Thunderstorm WarningSGFWright45 min
Apr 28, 2:47 PM CDTSevere Thunderstorm WarningSGFTexas58 min
Apr 28, 3:43 PM CDTSevere Thunderstorm WarningSGFTexas62 min
Apr 28, 4:16 PM CDTFlash Flood WarningSGFTexas3 hr
Apr 28, 4:28 PM CDTSevere Thunderstorm WarningSGFWright62 min
Apr 28, 4:40 PM CDTSevere Thunderstorm WarningSGFHowell65 min
Apr 28, 4:43 PM CDTSevere Thunderstorm WarningSGFTexas62 min
Apr 28, 5:14 PM CDTSevere Thunderstorm WarningSGFShannon46 min
Apr 28, 5:24 PM CDTSevere Thunderstorm WarningSGFWright66 min
Apr 28, 5:32 PM CDTSevere Thunderstorm WarningSGFOregon58 min
Apr 28, 5:39 PM CDTSevere Thunderstorm WarningSGFHowell66 min
Apr 28, 5:43 PM CDTSevere Thunderstorm WarningSGFTexas62 min
Apr 28, 5:47 PM CDTSevere Thunderstorm WarningSGFDouglas58 min
Apr 28, 6:36 PM CDTSevere Thunderstorm WarningSGFDouglas, Howell54 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.6 hours before the alert went out and 186 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 12:00Z on 2003-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 91 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 12:00Z on 2003-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.193958Sfc1 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
91 J/kg
Mixed-layer CIN
-341 J/kg
Mixed-layer LCL
1785 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
208 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 12:09 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Madison, Marion and 1 more2 hr
Apr 28, 1:13 PM CDTMesoscale DiscussionSPCClay, Crawford, Edwards, Effingham, Fayette, Franklin and 18 more2 hr
Apr 28, 3:56 PM CDTMesoscale DiscussionSPCAlexander, Jackson, Monroe, Perry, Randolph, Saint Clair and 2 more2 hr
Apr 28, 2:12 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clinton, Daviess and 7 more93 min
Apr 28, 5:10 PM CDTMesoscale DiscussionSPCBarton, Bates, Cass, Jackson, Jasper, McDonald and 2 more65 min
Apr 28, 5:30 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Bates, Cedar, Dade, Jasper and 5 more3 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2003Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Arkansas, 2003Every severe thunderstorm watch 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.