Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 3, NWS Milwaukee, WI

April 18, 2002Fond du Lac County, Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 18, 2002, 7:17 AM CDT for Fond du Lac County, Sheboygan County, Wisconsin. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 18, 2002, 7:17 AM CDT (12:17 UTC)
Expired
Apr 18, 2002, 8:15 AM CDT
In force
58 min
Issued by
NWS Milwaukee, WI
Area
Counties, with a storm outline in the text

Counties Fond du Lac County, WI, Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 73 km from the middle of the area, began a volume at 12:19 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.

What was reported inside it

TimeReportWhereRemark
Apr 18, 7:36 AM CDTHail 0.75Plymouth, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 0.3 hours before the alert went out and 71 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 12:00Z on 2002-04-18Temperature 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, Green Bay/Straub, WI at 12:00Z on 2002-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 460 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
1774 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
460 m²/s²
0-3 km storm-relative helicity
766 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KMKX 181217
SVRMKE
WIC039-117-181315-


BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
716 AM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN FOND DU LAC COUNTY IN EAST CENTRAL WISCONSIN
  SHEBOYGAN COUNTY IN EAST CENTRAL WISCONSIN

* UNTIL 815 AM CDT

* AT 716 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 6 MILES NORTHWEST OF MOUNT
  CALVARY TO EDEN...OR FROM 11 MILES WEST OF NEW HOLSTEIN TO 9 MILES
  SOUTH OF FOND DU LAC...MOVING NORTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ST CLOUD AT 745 AM CDT.
  WALDO AT 755 AM CDT.
  PLYMOUTH AT 800 AM CDT.
  SHEBOYGAN FALLS AT 810 AM CDT.

IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD PREPARE FOR WIND 
GUSTS IN EXCESS OF 40 MPH...LARGE HAIL...AND DEADLY LIGHTNING. SEEK 
SHELTER IMMEDIATELY

LAT...LON 4391 8832 4359 8841 4357 8782 4411 8786
          4391 8785 4390 8815

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 7:25 AM CDTSpecial Marine WarningMKX65 min
Apr 18, 7:25 AM CDTSpecial Marine WarningMKX65 min
Apr 18, 2:48 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette, Sauk57 min
Apr 18, 3:07 PM CDTTornado WarningMKXLafayette23 min
Apr 18, 3:21 PM CDTSpecial Marine WarningMKX24 min
Apr 18, 3:21 PM CDTSpecial Marine WarningMKX24 min
Apr 18, 3:29 PM CDTTornado WarningMKXLafayette31 min
Apr 18, 3:31 PM CDTTornado WarningMKXLafayette29 min
Apr 18, 3:44 PM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Iowa, Sauk61 min
Apr 18, 3:57 PM CDTTornado WarningMKXGreen, Lafayette33 min
Apr 18, 4:03 PM CDTTornado WarningMKXColumbia, Sauk27 min
Apr 18, 4:31 PM CDTTornado WarningMKXColumbia, Sauk29 min
Apr 18, 4:45 PM CDTSevere Thunderstorm WarningMKXGreen, Rock60 min
Apr 18, 4:56 PM CDTTornado WarningMKXRock49 min
Apr 18, 4:59 PM CDTSevere Thunderstorm WarningMKXMarquette31 min
Apr 18, 5:30 PM CDTSevere Thunderstorm WarningMKXJefferson, Rock, Walworth60 min
Apr 18, 5:32 PM CDTSevere Thunderstorm WarningMKXDane43 min
Apr 18, 5:34 PM CDTSpecial Marine WarningMKX56 min
Apr 18, 5:34 PM CDTSpecial Marine WarningMKX56 min
Apr 18, 5:34 PM CDTSpecial Marine WarningMKX56 min
Apr 18, 6:10 PM CDTSevere Thunderstorm WarningMKXDane, Jefferson35 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min
Apr 18, 6:33 PM CDTSpecial Marine WarningMKX57 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2002Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.