Alert archive / Illinois / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 365

May 31, 200217 counties in Illinois; 14 counties in Iowa; 5 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 31, 2002, 11:00 PM CDT for 17 counties in Illinois; 14 counties in Iowa; 5 counties in Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 31, 2002, 11:00 PM CDT (04:00 UTC)
Expired
Jun 1, 2002, 4:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 36 counties

Appanoose County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Van Buren County, IA, Wapello County, IA, Wayne County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Christian County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Morgan County, IL, Sangamon County, IL, Schuyler County, IL, Tazewell County, IL, Warren County, IL, Clark County, MO, Lewis County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 132 km from the middle of the area, began a volume at 03:59 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

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

IssuedProductOfficeCountiesLasted
May 31, 11:04 PM CDTSevere Thunderstorm WarningDMXDavis56 min
Jun 1, 12:15 AM CDTSevere Thunderstorm WarningDVNHenderson45 min
Jun 1, 12:56 AM CDTSevere Thunderstorm WarningDVNJefferson49 min
Jun 1, 2:18 AM CDTSevere Thunderstorm WarningDVNJefferson42 min
Jun 1, 2:38 AM CDTSevere Thunderstorm WarningDVNVan Buren67 min
Jun 1, 3:00 AM CDTSevere Thunderstorm WarningDVNLee45 min
Jun 1, 3:31 AM CDTSevere Thunderstorm WarningDVNHenry44 min

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.0 hours before the alert went out and 263 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 00:00Z on 2002-06-01Temperature 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, Lincoln, IL at 00:00Z on 2002-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3066 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
244 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

Nearby

Severe Thunderstorm Watches in Illinois, 2002Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in Missouri, 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.