Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS Green Bay, WI

June 18, 2012Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 18, 2012, 7:31 PM CDT for Manitowoc County, Wisconsin. It was in force for 21 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
Jun 18, 2012, 7:31 PM CDT (00:31 UTC)
Expired
Jun 18, 2012, 7:52 PM CDT
In force
21 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

County Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 65 km from the middle of the area, began a volume at 00:31 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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 18, 12:24 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.5 hours before the alert went out and 62 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 2012-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1546 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 2012-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 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
1546 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
158 m²/s²
Significant tornado parameter
1.7
Supercell composite
8.5

Open this sounding in Storm Lab

The text

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

472 
WUUS53 KGRB 190031
SVRGRB
WIC071-190100-
/O.NEW.KGRB.SV.W.0046.120619T0031Z-120619T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
731 PM CDT MON JUN 18 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL MANITOWOC COUNTY IN EAST CENTRAL WISCONSIN...

* UNTIL 800 PM CDT

* AT 726 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 6 MILES WEST OF CLEVELAND...OR 8 MILES NORTH
  OF HOWARDS GROVE...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CLEVELAND AROUND 740 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4403 8791 4406 8764 4405 8764 4404 8766
      4400 8767 4399 8769 4396 8769 4393 8771
      4390 8772 4389 8773 4389 8791
TIME...MOT...LOC 0031Z 273DEG 26KT 4394 8782
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG
2 follow-up statements
310 
WWUS53 KGRB 190039
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
739 PM CDT MON JUN 18 2012

WIC071-190100-
/O.CON.KGRB.SV.W.0046.000000T0000Z-120619T0100Z/
MANITOWOC WI-
739 PM CDT MON JUN 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MANITOWOC COUNTY UNTIL 800 PM CDT...

AT 735 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS 
STORM WAS LOCATED NEAR CLEVELAND...MOVING EAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT CLEVELAND AND RURAL AREAS OF 
SOUTH CENTRAL MANITOWOC COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4403 8791 4406 8764 4405 8764 4404 8766
      4400 8767 4399 8769 4396 8769 4393 8771
      4390 8772 4389 8773 4389 8791
TIME...MOT...LOC 0038Z 273DEG 26KT 4394 8775
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG
445 
WWUS53 KGRB 190052
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
752 PM CDT MON JUN 18 2012

WIC071-190102-
/O.CAN.KGRB.SV.W.0046.000000T0000Z-120619T0100Z/
MANITOWOC WI-
752 PM CDT MON JUN 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MANITOWOC COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.  HOWEVER...SCATTERED THUNDERSTORMS WILL MOVE ACROSS MANITOWOC
COUNTY THROUGH 815 PM CDT. SOME OF THESE STORMS COULD PRODUCE SMALL 
HAIL...GUSTY WINDS AND HEAVY RAIN.

LAT...LON 4403 8791 4406 8764 4405 8764 4404 8766
      4400 8767 4399 8769 4396 8769 4393 8771
      4390 8772 4389 8773 4389 8791
TIME...MOT...LOC 0052Z 273DEG 26KT 4393 8761

$$

ECKBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:03 PM CDTSevere Thunderstorm WarningGRBManitowoc15 min
Jun 18, 7:14 PM CDTSpecial Marine WarningGRB61 min
Jun 19, 5:34 AM CDTSevere Thunderstorm WarningGRBLincoln, Marathon41 min
Jun 19, 6:14 AM CDTSevere Thunderstorm WarningGRBLanglade, Lincoln, Marathon, Menominee, Shawano46 min
Jun 19, 6:51 AM CDTSevere Thunderstorm WarningGRBForest, Langlade, Marathon, Marinette, Menominee, Oconto and 1 more39 min
Jun 19, 7:09 AM CDTSpecial Marine WarningGRB111 min
Jun 19, 7:24 AM CDTSevere Thunderstorm WarningGRBMarinette, Menominee, Oconto, Shawano51 min
Jun 19, 8:28 AM CDTSevere Thunderstorm WarningGRBDoor32 min
Jun 19, 8:52 AM CDTSpecial Marine WarningGRB48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.