Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 8, NWS Green Bay, WI

April 15, 2003Portage County, Waupaca County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 15, 2003, 4:56 PM CDT for Portage County, Waupaca County, Wisconsin. It was in force for 34 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
Apr 15, 2003, 4:56 PM CDT (21:56 UTC)
Expired
Apr 15, 2003, 5:30 PM CDT
In force
34 min
Issued by
NWS Green Bay, WI
Area
Counties, with a storm outline in the text

Counties Portage County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 92 km from the middle of the area, began a volume at 22:00 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.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.9 hours before the alert went out and 93 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 2003-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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 12:00Z on 2003-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.193958Sfc1 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
46 J/kg
Mixed-layer CIN
-629 J/kg
Mixed-layer LCL
1745 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
122 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.

623 
WUUS53 KGRB 152156
SVRGRB
WIC097-135-152230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
454 PM CDT TUE APR 15 2003

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PORTAGE COUNTY IN WISCONSIN
  WAUPACA COUNTY IN WISCONSIN

* UNTIL 530 PM CDT

* AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED    
  A CLUSTER OF SEVERE THUNDERSTORMS WITH STRONG WINDS AND HAIL. THE  
  STORM WAS LOCATED NEAR ALMOND. THAT PLACES IT 16 MILES WEST OF     
  WAUPACA. IT WAS MOVING EAST AT 35 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORM INCLUDE...
  KING BY 500 PM CDT.
  WAUPACA BY 500 PM CDT.
  WHITE LAKE IN WAUPACA COUNTY BY 505 PM CDT.
  NORTHPORT BY 510 PM CDT.
  ROYALTON BY 510 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 4458 8965 4425 8957 4427 8879 4466 8871

$$

ECKBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 14, 9:43 PM CDTSevere Thunderstorm WarningGRBVilas47 min
Apr 14, 10:23 PM CDTSevere Thunderstorm WarningGRBVilas67 min
Apr 15, 2:31 PM CDTSevere Thunderstorm WarningGRBShawano59 min
Apr 15, 2:46 PM CDTSevere Thunderstorm WarningGRBOconto59 min
Apr 15, 2:47 PM CDTSevere Thunderstorm WarningGRBDoor, Kewaunee43 min
Apr 15, 3:03 PM CDTSpecial Marine WarningGRB72 min
Apr 15, 3:03 PM CDTSpecial Marine WarningGRB72 min
Apr 15, 3:48 PM CDTSevere Thunderstorm WarningGRBDoor, Kewaunee27 min
Apr 15, 4:44 PM CDTSevere Thunderstorm WarningGRBBrown, Outagamie, Shawano61 min
Apr 15, 4:46 PM CDTSpecial Marine WarningGRB59 min
Apr 15, 5:13 PM CDTSevere Thunderstorm WarningGRBKewaunee62 min
Apr 15, 5:30 PM CDTSevere Thunderstorm WarningGRBOutagamie, Portage, Waupaca60 min
Apr 15, 5:35 PM CDTSpecial Marine WarningGRB85 min
Apr 15, 5:35 PM CDTSpecial Marine WarningGRB85 min
Apr 15, 5:35 PM CDTSpecial Marine WarningGRB85 min
Apr 15, 5:46 PM CDTSevere Thunderstorm WarningGRBOutagamie, Portage, Waupaca44 min
Apr 15, 5:57 PM CDTSevere Thunderstorm WarningGRBShawano63 min
Apr 15, 6:03 PM CDTSevere Thunderstorm WarningGRBMarathon42 min
Apr 15, 6:29 PM CDTSevere Thunderstorm WarningGRBOutagamie, Waupaca46 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2003Every 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.