Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 63, NWS Green Bay, WI

July 3, 2012Forest County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 3, 2012, 12:02 AM CDT for Forest County, Wisconsin. It was in force for 31 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 3, 2012, 12:02 AM CDT (05:02 UTC)
Expired
Jul 3, 2012, 12:33 AM CDT
In force
31 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Forest County, WI

The radar

The Marquette radar (KMQT), 126 km from the middle of the area, began a volume at 05:06 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 3, 12:10 AM CDTHAIL 1.75Crandon, WIDELAYED PUBLIC REPORT VIA WJFW-TV.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 2, 10:13 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.0 hours before the alert went out and 163 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 2012-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3426 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 00:00Z on 2012-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939Sfc1 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
3426 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1137 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
-0.2
Supercell composite
-1.1

Open this sounding in Storm Lab

The text

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

261 
WUUS53 KGRB 030502
SVRGRB
WIC041-030600-
/O.NEW.KGRB.SV.W.0063.120703T0502Z-120703T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
1202 AM CDT TUE JUL 3 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FOREST COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 100 AM CDT

* AT MIDNIGHT CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THESE STORMS WERE LOCATED NEAR CRANDON...AND MOVING
  NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  POPPLE RIVER...ARGONNE...FRANKLIN LAKE CAMPGROUND...WINDSOR DAM
  CAMPGROUND...LAONA...BLACKWELL...NEWALD AND CAVOUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND DEADLY
LIGHTNING. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4603 8882 4604 8878 4602 8877 4603 8873
      4602 8868 4572 8868 4553 8848 4542 8893
      4546 8892 4546 8902 4565 8905 4598 8905
      4598 8894 4607 8893 4607 8891
TIME...MOT...LOC 0502Z 247DEG 24KT 4555 8884 4552 8885
WIND...HAIL <50MPH 1.00IN

$$

TH
2 follow-up statements
647 
WWUS53 KGRB 030520
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1220 AM CDT TUE JUL 3 2012

WIC041-030600-
/O.CON.KGRB.SV.W.0063.000000T0000Z-120703T0600Z/
FOREST WI-
1220 AM CDT TUE JUL 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FOREST COUNTY
UNTIL 100 AM CDT...

AT 1216 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. 
THESE STORMS WERE LOCATED 9 MILES EAST OF CRANDON...MOVING NORTHEAST
AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  BLACKWELL...NEWALD...CAVOUR AND ALVIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. IF INDOORS...STAY AWAY FROM WINDOWS. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY 
LEAD TO FLASH FLOODING. A FLASH FLOOD WARNING REMAINS IN EFFECT FOR 
SOUTHERN FOREST COUNTY UNTIL 430 AM CDT. DO NOT DRIVE YOUR VEHICLE 
THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4603 8882 4604 8879 4602 8877 4603 8873
      4602 8871 4602 8868 4572 8868 4553 8848
      4546 8875 4570 8905 4598 8905 4598 8894
      4607 8893
TIME...MOT...LOC 0517Z 247DEG 24KT 4559 8871 4560 8871
WIND...HAIL <50MPH 1.00IN

$$

KALLAS
111 
WWUS53 KGRB 030533
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1233 AM CDT TUE JUL 3 2012

WIC041-030542-
/O.CAN.KGRB.SV.W.0063.000000T0000Z-120703T0600Z/
FOREST WI-
1233 AM CDT TUE JUL 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR FOREST COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY.  HOWEVER...SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE 
STILL POSSIBLE WITH THESE THUNDERSTORMS.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT.

LAT...LON 4603 8882 4604 8879 4602 8877 4603 8873
      4602 8871 4602 8868 4572 8868 4553 8848
      4546 8875 4570 8905 4598 8905 4598 8894
      4607 8893
TIME...MOT...LOC 0532Z 247DEG 24KT 4563 8858 4564 8858

$$

KALLAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 7:01 PM CDTFlash Flood WarningGRBWinnebago91 min
Jul 2, 7:18 PM CDTSevere Thunderstorm WarningGRBWinnebago27 min
Jul 2, 7:33 PM CDTSevere Thunderstorm WarningGRBFlorence, Forest, Langlade, Marinette, Oconto57 min
Jul 2, 8:24 PM CDTFlash Flood WarningGRBForest, Langlade, Oconto8 hr
Jul 2, 11:09 PM CDTSevere Thunderstorm WarningGRBOneida, Vilas66 min
Jul 3, 12:47 AM CDTSevere Thunderstorm WarningGRBFlorence, Forest, Langlade, Marinette, Oconto58 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.