Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 65, NWS Green Bay, WI

May 31, 1998Brown County, Calumet County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 31, 1998, 1:26 AM CDT for Brown County, Calumet County, Wisconsin. It was in force for 64 min. 5 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 31, 1998, 1:26 AM CDT (06:26 UTC)
Expired: May 31, 1998, 2:30 AM CDT
In force: 64 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Brown County, WI, Calumet County, WI

The radar

The Green Bay radar (KGRB), 25 km from the middle of the area, began a volume at 06:28 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

Time	Report	Where
May 31, 1:52 AM CDT	Hail 0.88	Wrightstown, WI
May 31, 2:20 AM CDT	Tornado F1	Stockbridge, WI
May 31, 2:25 AM CDT	Thunderstorm Wind 75	Sherwood, WI
May 31, 2:30 AM CDT	Thunderstorm Wind 60	Chilton, WI
May 31, 2:40 AM CDT	Thunderstorm Wind 55	New Holstein, 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.

Issued	Product	Office	Lasted
May 31, 1:00 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.4 hours before the alert went out and 22 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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

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

481 
WUUS1 KGRB 310628 RRA
SVRGRB
WIC009-015-310730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
126 AM CDT SUN MAY 31 1998

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN NORTHEASTERN WISCONSIN
  CALUMET COUNTY IN EAST CENTRAL WISCONSIN

* UNTIL 230 AM CDT

* AT 123 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  CLUSTER OF SEVERE THUNDERSTORMS FROM APPLETON TO NEAR GREEN BAY.
  THESE STORMS WERE MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREEN BAY BY 150 AM AND
  BRILLION BY 130 AM

THIS STORM CONTAINS HAIL UP TO ONE INCH IN DIAMETER.  MOVE TO A
STURDY SHELTER AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE WARNING.
STAY TUNED TO NOAA WEATHER RADIO FOR ADDITIONAL WEATHER INFORMATION.

DI/JS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Green Bay, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 3:15 PM CDT, 10 hours 11 minutes earlier.

Area forecast discussion, May 30, 3:15 PM CDT, 10 hours 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
315 PM CDT SAT MAY 30 1998

FSCT CONCRN THIS EVENING WILL BE THREAT FOR SEVERE WEATHER

SFC ANALYSIS SHOWS STRONG WARM FRONT OVR SOUTHWEST WISCONSIN INTO
SOUTHERN MINNESOTA.  LATEST VIS PIX AND WSR-88D DATA SHOWS ELEVATED
CONVECTION TRYING TO GET ORGANIZED NORTH OF THE WARM FRONT OVR WESTERN
WISCONSIN AS SOUTHERLY 30-40 KNOTS WIND FEEDING UNSTABLE AIR INTO THIS
REGION. THIS ACTIVITY WILL NEED TO WATCHED CLOSELY NEXT HOUR OR TWO AS
AIRMASS TO SOUTH CONTINUES TO DESTABILIZE AND UPPER-LEVEL WINDS INCREASE
OVER THE AREA.

FURTHER SOUTH...STRONG BAROCLINIC ZONE OVR SOUTHWEST WILL BE FOCUS OF
MAIN SVR THREAT LATER THIS EVENING AS UPPER DYNAMICS ARRIVE. SEVERE
CONVECTION IS EXPECTED TO REFIRE OVR NORTHERN IOWA AND SOUTHERN MN EARLY
THIS EVENING...THEN MOVE EASTWARD ACROSS CENTRAL AND SOUTHERN WI
TONIGHT. CONDITIONS SHOULD IMPROVE BY 12Z SUNDAY AS BOTH MODELS BRINGING
COOLER AND DRIER AIR INTO THE REGION.

COORD WITH KMKX.

In the hours before

Local storm report, May 31, 12:13 AM CDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
1213 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1028 PM    MARSHFIELD                WI   1 INCH HAIL
05/30/98   WOOD

1030 PM    1 S SPENCER               WI   1.75 INCH HAIL
05/30/98   MARATHON

1042 PM    ROZELLVILLE               WI   .75 INCH HAIL
05/30/98   MARATHON

1150 PM    SPLIT ROCK                WI   1 INCH HAIL
05/30/98   SHAWANO

1200 AM    MARION                    WI   .75 INCH HAIL
05/31/98   WAUPACA                                           D

KIECKBUSCH

Local storm report, May 31, 12:25 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
1225 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1217 AM    5 W SHAWANO               WI   1.75 INCH HAIL
05/31/98   SHAWANO

1225 AM    ATHENS                    WI   1 INCH HAIL
05/31/98   MARATHON

PLH

Local storm report, May 31, 12:25 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
1225 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1217 AM    5 W SHAWANO               WI   1.75 INCH HAIL
05/31/98   SHAWANO

1225 AM    ATHENS                    WI   1 INCH HAIL
05/31/98   MARATHON

PLH

Local storm report, May 31, 12:52 AM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
1252 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1243 AM    ADVANCE                   WI   1 INCH HAIL
05/31/98   SHAWANO

1248 AM    SPENCER                   WI   1 INCH HAIL
05/31/9V8   MARATHON

PLH

Local storm report, May 31, 1:19 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
119 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0102 AM    SW WAUSAU                 WI   .88 INCH HAIL
05/31/98   MARATHON

0105 AM    STRATFORD                 WI   1 INCH HAIL
05/31/98   MARATHON

0107 AM    GILLETT                   WI   .75 INCH HAIL
05/31/98   OCONTO

PLH

Local storm report, May 31, 1:19 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
119 AM CDT SUN MAY 31 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0102 AM    SW WAUSAU                 WI   .88 INCH HAIL
05/31/98   MARATHON

0105 AM    STRATFORD                 WI   1 INCH HAIL
05/31/98   MARATHON

0107 AM    GILLETT                   WI   .75 INCH HAIL
05/31/98   OCONTO

PLH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 10:16 PM CDT	Severe Thunderstorm Warning	GRB	Wood	44 min
May 30, 10:25 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	60 min
May 30, 10:53 PM CDT	Severe Thunderstorm Warning	GRB	Portage	62 min
May 30, 11:17 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	63 min
May 30, 11:37 PM CDT	Severe Thunderstorm Warning	GRB	Shawano, Waupaca	63 min
May 31, 12:18 AM CDT	Tornado Warning	GRB	Marathon	47 min
May 31, 12:36 AM CDT	Severe Thunderstorm Warning	GRB	Shawano	34 min
May 31, 12:46 AM CDT	Severe Thunderstorm Warning	GRB	Oconto	59 min
May 31, 12:56 AM CDT	Severe Thunderstorm Warning	GRB	Waupaca, Waushara, Winnebago	64 min
May 31, 12:56 AM CDT	Severe Thunderstorm Warning	GRB	Outagamie	64 min
May 31, 1:04 AM CDT	Tornado Warning	GRB	Marathon	61 min
May 31, 1:07 AM CDT	Severe Thunderstorm Warning	GRB	Menominee, Shawano	63 min
May 31, 1:17 AM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	78 min
May 31, 1:24 AM CDT	Severe Thunderstorm Warning	GRB	Waupaca, Waushara	61 min
May 31, 1:43 AM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	62 min
May 31, 2:01 AM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Winnebago	34 min
May 31, 2:20 AM CDT	Severe Thunderstorm Warning	GRB	Kewaunee, Manitowoc	75 min
May 31, 2:20 AM CDT	Severe Thunderstorm Warning	GRB	Door	75 min
May 31, 2:27 AM CDT	Severe Thunderstorm Warning	GRB	Brown, Calumet	33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.