Alert archive / Illinois / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 17

March 9, 200239 counties in Illinois; Lake County, Indiana; 9 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Mar 9, 2002, 4:00 AM CST for 39 counties in Illinois; Lake County, Indiana; 9 counties in Wisconsin. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Mar 9, 2002, 4:00 AM CST (10:00 UTC)
Expired
Mar 9, 2002, 8:00 AM CST
In force
4 hr
Issued by
the Storm Prediction Center
All 49 counties

Boone County, IL, Bureau County, IL, Champaign 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, Mason County, IL, McHenry County, IL, McLean County, IL, Menard County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Sangamon County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Vermilion County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Lake County, IN, 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

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 9, 4:58 AM CSTSevere Thunderstorm WarningLOTDeKalb, LaSalle32 min

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.0 hours before the alert went out and 97 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 2002-03-09Temperature 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 2002-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 297 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1502 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
297 m²/s²
0-3 km storm-relative helicity
386 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
Mar 8, 11:30 PM CSTSevere Thunderstorm WatchSPCAdams, Brown, Bureau, Carroll, Fulton, Hancock and 14 more5 hr
Mar 8, 11:45 PM CSTSevere Thunderstorm WatchSPCMonroe, Randolph4 hr

Nearby

Severe Thunderstorm Watches in Illinois, 2002Severe Thunderstorm Watches in Wisconsin, 2002Severe Thunderstorm Watches in Indiana, 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.