Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 58, NWS Green Bay, WI

August 6, 2003Marathon County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Aug 6, 2003, 5:34 PM CDT for Marathon County, Wisconsin. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 6, 2003, 5:34 PM CDT (22:34 UTC)
Expired: Aug 6, 2003, 6:30 PM CDT
In force: 56 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Marathon County, WI

The radar

The Green Bay radar (KGRB), 123 km from the middle of the area, began a volume at 22:34 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.6 hours before the alert went out and 124 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: 200 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

307 
WUUS53 KGRB 062234
SVRGRB
WIC073-062330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
532 PM CDT WED AUG 6 2003

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 630 PM CDT

* AT 532 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS WITH HAIL UP TO 1 INCH IN DIAMETER. 
  THE LINE WAS LOCATED FROM 12 MILES NORTHWEST OF WAUSAU TO 10 
  MILES NORTHEAST OF WAUSAU. THE LINE WAS MOVING SOUTH AT 20 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BROKAW AROUND 540 PM
  WAUSAU AROUND 550 PM
  NUTTERVILLE AROUND 550 PM
  SUNSET AROUND 555 PM

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

LAT...LON 4511 8946 4512 8971 4471 8966 4470 8936

$$

HELMAN

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 Aug 6, 3:15 PM CDT, 2 hours 19 minutes earlier.

Area forecast discussion, Aug 6, 3:15 PM CDT, 2 hours 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
315 PM CDT WED AUG 6 2003

UPPER AIR PATTERN CONTINUED TO SHOW A CLOSED SYSTEM AND TROUGH OVER THE
EASTERN PART OF THE COUNTRY TODAY. MID RANGE FORECAST MODELS DO NOT SHOW
THIS MOVING OFF TO THE EAST UNTIL AT LEAST EARLY NEXT WEEK.

LATE AFTERNOON GREEN BAY RADAR LOOP SHOWED A LINE OF THUNDERSTORM CELLS
FROM THE CENTRAL BAY OF GREEN BAY TO CENTRAL WISCONSIN. THERE WERE A FEW
CELLS SOUTH OF THIS LINE AND A LARGER AREA OF SHOWERS AND SOME
THUNDERSTORMS NORTH OF THE LINE. 12Z SOUNDING AT GRB THIS MORNING WAS
RATHER MOIST WITH PW OF 1.41 IN. UPSTREAM SOUNDINGS HAD PW VALUES OF AT
LEAST 1.20 IN. 850-700 MB MEAN RH PROGS KEEP AT LEAST 70 PERCENT RH
THROUGH THURSDAY NIGHT. WOULD EXPECT SOME THUNDERSTORMS TO DEVELOP AGAIN
TOMORROW WITH DAYTIME HEATING SO HAVE INCLUDED POPS IN THE FORECAST FOR
THURSDAY.

12Z GFS CONTINUES TO SHOW AN INTENSE MID LEVEL VORT AT 12Z SATURDAY THAT
IS FORECAST TO MOVE INTO NORTHEAST IA BY 12Z SUNDAY. IT WILL BE
INTERESTING TO SEE WHETHER THIS SHOWS UP AGAIN ON THE 00Z THURS RUN.

.GRB...NONE.

MG
WWW.CRH.NOAA.GOV/GRB

Hazardous weather outlook, Aug 6, 6:15 AM CDT, 11 hours 19 minutes before

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-071115-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
615 AM CDT WED AUG 6 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH-CENTRAL AND NORTHEAST
WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

SEVERE THUNDERSTORMS ARE NOT EXPECTED TODAY OR TONIGHT. AN UPPER LEVEL
DISTURBANCE WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS MAINLY
DURING THE AFTERNOON AND EARLY EVENING HOURS...BUT THEY SHOULD NOT BE
SEVERE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE SUNDAY AND TUESDAY NEXT WEEK...BUT
THEY ARE NOT EXPECTED TO BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION SHOULD NOT BE NECESSARY TODAY OR TONIGHT.

RDM
WWW.CRH.NOAA.GOV/GRB

In the hours before

Local storm report, Aug 6, 1:53 PM CDT, 3 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
153 PM CDT WED AUG 6 2003

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

0150 PM    3 E MOUNTAIN              WI   .50 INCH HAIL
08/06/03   OCONTO                         HAIL ACCUMULATING ON
                                          GROUND.  VERY HEAVY RAIN.
                                          WIND GUST ESTIMATED TO 45
                                          MPH.  REPORT FROM SPOTTER.

JKL

Local storm report, Aug 6, 3:16 PM CDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
316 PM CDT WED AUG 6 2003

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

0316 PM    8 NE GREEN BAY            WI   58 MPH WIND GUST
08/06/03   BROWN                          MEASURED WIND ON GREEN BAY
                                          LIGHT HOUSE IN BAY OF GREEN
                                          BAY. (80 FT ELEVATION)

JKL

Local storm report, Aug 6, 3:49 PM CDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
349 PM CDT WED AUG 6 2003

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

0330 PM    GREEN BAY                 WI   WIND DAMAGE
08/06/03   BROWN                          POWER LINES DOWN ON EAST
                                          SIDE OF GREEN BAY.  REPORT
                                          FROM SHERIFF.

JKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 2:23 PM CDT	Special Marine Warning	GRB		67 min
Aug 6, 3:28 PM CDT	Severe Thunderstorm Warning	GRB	Brown	47 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2003 Every severe thunderstorm warning in 2003

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; radar from the NEXRAD Level II archive.