Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 84, NWS Green Bay, WI

July 30, 2012Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2012, 7:21 PM CDT for Manitowoc County, Wisconsin. It was in force for 54 min. 4 reports 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 30, 2012, 7:21 PM CDT (00:21 UTC)
Expired
Jul 30, 2012, 8:15 PM CDT
In force
54 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 44 km from the middle of the area, began a volume at 00:22 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 30, 7:57 PM CDTHAIL 0.75Maribel, WI
Jul 30, 8:00 PM CDTHAIL 2Maribel, WIHAIL AT LEAST 2 INCHES IN DIAMETER.
Jul 30, 8:03 PM CDTHAIL 1Maribel, WIHAIL A LITTLE LARGER THAN QUARTERS.
Jul 30, 8:22 PM CDTHAIL 0.5Mishicot, WIAND 42 MPH WIND GUST

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 30, 1:28 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 365 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, Davenport, at 00:00Z on 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 693 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, Davenport, at 00:00Z on 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
693 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1937 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

207 
WUUS53 KGRB 310021
SVRGRB
WIC071-310115-
/O.NEW.KGRB.SV.W.0084.120731T0021Z-120731T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
721 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 717 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM TWO
  CREEKS TO BRILLION...AND MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TWO CREEKS AROUND 730 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
MELNIK...MAPLE GROVE...LARRABEE...KELLNERSVILLE...GRIMMS...POINT
BEACH NUCLEAR PLANT...FISHERVILLE...TAUS...CATO AND WHITELAW.

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 4418 8805 4424 8804 4424 8789 4432 8789
      4433 8785 4433 8754 4429 8753 4423 8750
      4417 8752 4414 8756 4412 8761 4410 8764
      4408 8765
TIME...MOT...LOC 0021Z 289DEG 27KT 4435 8753 4423 8798
WIND...HAIL <50MPH 1.00IN

$$

TH
2 follow-up statements
418 
WWUS53 KGRB 310044
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
744 PM CDT MON JUL 30 2012

WIC071-310115-
/O.CON.KGRB.SV.W.0084.000000T0000Z-120731T0115Z/
MANITOWOC WI-
744 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MANITOWOC COUNTY UNTIL 815 PM CDT...

AT 740 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 6 MILES WEST OF TWO CREEKS...OR 14 MILES SOUTHWEST
OF KEWAUNEE...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAPLE GROVE AROUND 750 PM CDT. 
  MARIBEL AND TWO CREEKS AROUND 755 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE POINT
BEACH NUCLEAR PLANT AND POINT BEACH STATE FOREST.

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 4418 8805 4424 8804 4424 8789 4432 8789
      4433 8785 4433 8754 4429 8753 4423 8750
      4417 8752 4414 8756 4412 8761 4410 8764
      4408 8765
TIME...MOT...LOC 0042Z 285DEG 34KT 4429 8765
WIND...HAIL <50MPH 1.00IN

$$

ECKBERG
905 
WWUS53 KGRB 310059
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
759 PM CDT MON JUL 30 2012

WIC071-310115-
/O.CON.KGRB.SV.W.0084.000000T0000Z-120731T0115Z/
MANITOWOC WI-
759 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MANITOWOC COUNTY UNTIL 815 PM CDT...

AT 754 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH BALL SIZE HAIL. 
THIS STORM WAS LOCATED 5 MILES SOUTH OF DENMARK...OR 14 MILES 
NORTHWEST OF MANITOWOC...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FISHERVILLE AND LARRABEE BY 8 PM CDT. 
  MISHICOT BY 805 PM CDT. 
  TWO CREEKS AROUND 810 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE FRANCIS 
CREEK...FISHERVILLE...SHOTO...POINT BEACH NUCLEAR PLANT...POINT 
BEACH STATE FOREST AND TWO RIVERS.

AT 758 PM...THREE QUARTER INCH HAIL WAS REPORTED AT MARIBEL. 

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 4418 8805 4424 8804 4424 8789 4432 8789
      4433 8785 4433 8754 4429 8753 4423 8750
      4417 8752 4414 8756 4412 8761 4410 8764
      4408 8765
TIME...MOT...LOC 0056Z 287DEG 33KT 4426 8777
WIND...HAIL <50MPH 1.50IN

$$

ECKBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:11 PM CDTSevere Thunderstorm WarningGRBBrown49 min
Jul 30, 7:30 PM CDTSevere Thunderstorm WarningGRBKewaunee30 min
Jul 30, 7:44 PM CDTSevere Thunderstorm WarningGRBDoor61 min
Jul 30, 8:14 PM CDTSevere Thunderstorm WarningGRBManitowoc46 min
Jul 30, 8:38 PM CDTSpecial Marine WarningGRB2 hr

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.