Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 77, NWS Green Bay, WI

July 30, 2002Waushara County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2002, 8:29 PM CDT for Waushara County, Wisconsin. It was in force for 46 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
Jul 30, 2002, 8:29 PM CDT (01:29 UTC)
Expired
Jul 30, 2002, 9:15 PM CDT
In force
46 min
Issued by
NWS Green Bay, WI
Area
Counties, with a storm outline in the text

County Waushara County, WI

The radar

The Green Bay radar (KGRB), 98 km from the middle of the area, began a volume at 01:33 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
Jul 30, 8:45 PM CDTThunderstorm Wind 52 MSaxeville, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 30, 5:35 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 98 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 2002-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3877 joules per kilogram.LCLEL10008507005003002001001 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 2002-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
3877 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1398 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.0

Open this sounding in Storm Lab

The text

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

983 
WUUS53 KGRB 310129
SVRGRB
WIC137-310215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
829 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WAUSHARA COUNTY IN WISCONSIN

* UNTIL 915 PM CDT

* AT 829 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS WITH STRONG WINDS AND HAIL. THE LINE
  WAS LOCATED FROM 11 MILES NORTH OF WAUTOMA TO WAUTOMA. THE LINE WAS
  MOVING EAST AT 45 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
  WAUTOMA BY 830 PM CDT.
  WILD ROSE BY 830 PM CDT.
  SILVER LAKE BY 835 PM CDT.
  MOUNT MORRIS BY 835 PM CDT.

IF YOU ARE IN THE WARNED AREA...PREPARE FOR WINDS IN EXCESS OF 60
MPH...HAIL...AND DEADLY LIGHTNING. SEEK SHELTER IMMEDIATELY.

FREQUENT CLOUD-TO-GROUND LIGHTNING IS LIKELY. IF OUTDOORS...STAY AWAY
FROM ISOLATED HIGH OBJECTS SUCH AS TREES. ALSO AVOID METAL OBJECTS.

LAT...LON 4424 8944 4399 8946 4400 8893 4423 8892

KURIMSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:12 PM CDTSevere Thunderstorm WarningGRBPortage, Wood63 min
Jul 30, 7:16 PM CDTSevere Thunderstorm WarningGRBLanglade59 min
Jul 30, 7:28 PM CDTTornado WarningGRBLanglade, Lincoln32 min
Jul 30, 7:44 PM CDTTornado WarningGRBShawano46 min
Jul 30, 7:55 PM CDTSevere Thunderstorm WarningGRBLincoln35 min
Jul 30, 8:03 PM CDTSevere Thunderstorm WarningGRBMenominee42 min
Jul 30, 8:11 PM CDTSevere Thunderstorm WarningGRBOconto49 min
Jul 30, 8:15 PM CDTSpecial Marine WarningGRB2 hr
Jul 30, 8:15 PM CDTSpecial Marine WarningGRB2 hr
Jul 30, 8:15 PM CDTSpecial Marine WarningGRB2 hr
Jul 30, 8:26 PM CDTSevere Thunderstorm WarningGRBShawano49 min
Jul 30, 8:46 PM CDTSevere Thunderstorm WarningGRBBrown, Vilas44 min
Jul 30, 8:51 PM CDTSevere Thunderstorm WarningGRBWinnebago39 min
Jul 30, 8:56 PM CDTSevere Thunderstorm WarningGRBOutagamie34 min
Jul 30, 9:17 PM CDTSevere Thunderstorm WarningGRBCalumet43 min
Jul 30, 9:25 PM CDTSpecial Marine WarningGRB95 min
Jul 30, 9:25 PM CDTSpecial Marine WarningGRB95 min
Jul 30, 9:29 PM CDTSevere Thunderstorm WarningGRBBrown, Manitowoc46 min
Jul 30, 9:43 PM CDTSevere Thunderstorm WarningGRBDoor32 min
Jul 31, 1:02 PM CDTSevere Thunderstorm WarningGRBOneida, Vilas58 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.