Alert archive / Illinois / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 435

May 28, 200336 counties in Illinois; 9 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2003, 2:10 PM CDT for 36 counties in Illinois; 9 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 28, 2003, 2:10 PM CDT (19:10 UTC)
Expired
May 28, 2003, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 45 counties

Boone County, IL, Bureau County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, McHenry County, IL, McLean County, IL, Moultrie County, IL, Ogle County, IL, Piatt County, IL, Putnam County, IL, Stephenson County, IL, Tazewell County, IL, Vermilion County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Dane County, WI, Green County, WI, Jefferson County, WI, Kenosha County, WI, Milwaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Chicago radar (KLOT), 25 km from the middle of the area, began a volume at 19:10 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

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

IssuedProductOfficeCountiesLasted
May 28, 2:15 PM CDTSevere Thunderstorm WarningILXPeoria, Woodford60 min
May 28, 2:41 PM CDTTornado WarningILXTazewell, Woodford49 min
May 28, 2:42 PM CDTTornado WarningLOTKankakee18 min
May 28, 2:51 PM CDTSevere Thunderstorm WarningLOTBoone, DeKalb, Kane, McHenry24 min
May 28, 3:06 PM CDTSevere Thunderstorm WarningLOTIroquois, Kankakee39 min
May 28, 3:20 PM CDTTornado WarningILXMcLean, Tazewell40 min
May 28, 3:25 PM CDTSevere Thunderstorm WarningILXLogan50 min
May 28, 3:34 PM CDTSevere Thunderstorm WarningLOTCook, DuPage, Kane, Kendall, Will41 min
May 28, 3:45 PM CDTSevere Thunderstorm WarningLOTIroquois60 min
May 28, 3:47 PM CDTTornado WarningILXLogan28 min
May 28, 3:55 PM CDTTornado WarningLOTWill20 min
May 28, 3:58 PM CDTTornado WarningILXDeWitt62 min
May 28, 4:08 PM CDTSevere Thunderstorm WarningILXMacon67 min
May 28, 4:10 PM CDTSevere Thunderstorm WarningLOTFord, Livingston50 min
May 28, 4:20 PM CDTSevere Thunderstorm WarningLOTCook, Will40 min
May 28, 4:34 PM CDTTornado WarningLOTWill26 min
May 28, 4:38 PM CDTSevere Thunderstorm WarningILXMoultrie, Piatt, Shelby52 min
May 28, 4:41 PM CDTSevere Thunderstorm WarningLOTGrundy, Kankakee49 min
May 28, 4:45 PM CDTTornado WarningILXChristian, Shelby45 min
May 28, 5:08 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston37 min
May 28, 5:39 PM CDTTornado WarningLOTFord21 min
May 28, 6:08 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion82 min
May 28, 6:14 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion76 min
May 28, 6:25 PM CDTTornado WarningILXChampaign, Vermilion65 min
May 28, 7:10 PM CDTTornado WarningILXEdgar50 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

Lincoln, IL (KILX), launched 12:00Z, 7.2 hours before the alert went out and 170 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 12:00Z on 2003-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Lincoln, IL at 12:00Z on 2003-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 square meters per square second.19395878Sfc1 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
2202 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
124 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
May 28, 12:56 PM CDTMesoscale DiscussionSPCBoone, Bureau, Champaign, DeKalb, DeWitt, Douglas and 21 more2 hr
May 28, 3:36 PM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Coles and 21 more114 min
May 28, 6:41 PM CDTMesoscale DiscussionSPCBoone, Bureau, Champaign, Christian, Coles, Cook and 30 more94 min

Nearby

Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Wisconsin, 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.