Alert archive / Wisconsin / Tornado Watches in 1998

Tornado Watch 473

May 31, 199813 counties in Illinois; 33 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at May 31, 1998, 1:00 AM CDT for 13 counties in Illinois; 33 counties in Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 31, 1998, 1:00 AM CDT (06:00 UTC)
Expired
May 31, 1998, 6:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 46 counties

Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Kane County, IL, Lake County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 31, 1:01 AM CDTSevere Thunderstorm WarningARXCrawford, Richland74 min
May 31, 1:01 AM CDTSevere Thunderstorm WarningMKXSauk89 min
May 31, 1:10 AM CDTSevere Thunderstorm WarningMKXColumbia, Green Lake, Marquette80 min
May 31, 1:15 AM CDTSevere Thunderstorm WarningMKXIowa90 min
May 31, 1:17 AM CDTSevere Thunderstorm WarningGRBPortage, Wood78 min
May 31, 1:24 AM CDTSevere Thunderstorm WarningGRBWaupaca, Waushara61 min
May 31, 1:26 AM CDTSevere Thunderstorm WarningGRBBrown, Calumet64 min
May 31, 1:28 AM CDTSevere Thunderstorm WarningMKXDane92 min
May 31, 1:28 AM CDTSevere Thunderstorm WarningMKXLafayette92 min
May 31, 1:46 AM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac89 min
May 31, 1:50 AM CDTSevere Thunderstorm WarningMKXGreen70 min
May 31, 1:57 AM CDTSevere Thunderstorm WarningMKXJefferson, Rock78 min
May 31, 2:01 AM CDTSevere Thunderstorm WarningGRBOutagamie, Winnebago34 min
May 31, 2:15 AM CDTSevere Thunderstorm WarningMKXSheboygan, Washington75 min
May 31, 2:15 AM CDTSevere Thunderstorm WarningMKXWaukesha75 min
May 31, 2:27 AM CDTSevere Thunderstorm WarningGRBBrown, Calumet33 min
May 31, 2:27 AM CDTSevere Thunderstorm WarningMKXMilwaukee, Ozaukee78 min
May 31, 2:27 AM CDTSevere Thunderstorm WarningMKXWalworth78 min
May 31, 2:42 AM CDTSevere Thunderstorm WarningMKXKenosha, Racine93 min

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.0 hours before the alert went out and 137 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, Green Bay/Straub, WI at 00:00Z on 1998-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 450 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, Green Bay/Straub, WI at 00:00Z on 1998-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 358 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
450 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
891 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
358 m²/s²
0-3 km storm-relative helicity
509 m²/s²
Significant tornado parameter
0.9
Supercell composite
9.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 3:00 PM CDTSevere Thunderstorm WatchSPCAlexander, Clay, Crawford, Edwards, Effingham, Franklin and 21 more6 hr
May 30, 10:00 PM CDTTornado WatchSPCBarron, Burnett, Chippewa, Dunn, Pepin, Pierce and 6 more6 hr
May 30, 11:30 PM CDTSevere Thunderstorm WatchSPCAdams, Buffalo, Chippewa, Clark, Eau Claire, Jackson and 20 more6 hr
May 31, 12:00 AM CDTTornado WatchSPCCrawford, Grant5 hr

Nearby

Tornado Watches in Wisconsin, 1998Tornado Watches in Illinois, 1998Every tornado watch in 1998

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.