Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 71, NWS Green Bay, WI

July 25, 2012Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 25, 2012, 7:51 PM CDT for Manitowoc County, Wisconsin. It was in force for 39 min. 8 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 25, 2012, 7:51 PM CDT (00:51 UTC)
Expired: Jul 25, 2012, 8:30 PM CDT
In force: 39 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 47 km from the middle of the area, began a volume at 00:53 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

Time	Report	Where	Remark
Jul 25, 8:07 PM CDT	TSTM WND GST 60	Valders, WI	GUSTY WINDS AND HALF INCH HAIL REPORTED.
Jul 25, 8:10 PM CDT	TSTM WND GST 56	Manitowoc, WI	REPORTED AT STRANGEL ELEMENTARY SCHOOL BY WBAY WEATHER NET. TIME ESTIMATED BY RADAR.
Jul 25, 8:10 PM CDT	TSTM WND GST 68	Manitowoc, WI
Jul 25, 8:10 PM CDT	TSTM WND GST 68	Manitowoc, WI	10 TREES DOWN IN TOWN.
Jul 25, 8:10 PM CDT	MARINE TSTM WIND 68	Two Rivers, WI	DIME SIZE HAIL AND GUSTY WINDS.
Jul 25, 8:10 PM CDT	NON-TSTM WND GST 56	Manitowoc, WI	REPORTED AT STRANGEL ELEMENTARY SCHOOL BY WBAY WEATHER NET. TIME ESTIMATED BY RADAR.
Jul 25, 8:13 PM CDT	HAIL 1	Two Rivers, WI
Jul 25, 8:15 PM CDT	HAIL 1.75	Two Rivers, WI	GOLF BALL SIZE HAIL AS WELL AS A DOWNED FLAG POLE AND CHAIRS THROWN ACROSS YARD DUE TO STRONG WINDS. REPORT VIA WLUK NEWS. TIME ESTIMATED BY RADAR.

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.

Issued	Product	Office	Lasted
Jul 25, 6:38 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 44 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: 2643 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1451 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 16.9

Open this sounding in Storm Lab

The text

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

900 
WUUS53 KGRB 260051
SVRGRB
WIC071-260130-
/O.NEW.KGRB.SV.W.0071.120726T0051Z-120726T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
751 PM CDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 830 PM CDT

* AT 749 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM DENMARK TO 8 MILES NORTH OF
  VALDERS TO 6 MILES SOUTHEAST OF BRILLION...AND MOVING EAST AT 40
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TWO CREEKS AROUND 805 PM CDT.
  CLEVELAND AND MANITOWOC AROUND 810 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
FISHERVILLE...KELLNERS CORNERS...MADSEN...SHOTO...MISHICOT...OSMAN...
SILVER LAKE COLLEGE...NEWTONBERG...POINT BEACH NUCLEAR PLANT AND
NEWTON.

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.

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

&&

LAT...LON 4413 8805 4416 8804 4418 8792 4424 8791
      4424 8789 4433 8788 4433 8753 4429 8753
      4423 8750 4417 8752 4410 8764 4400 8767
      4392 8772 4390 8774
TIME...MOT...LOC 0052Z 290DEG 37KT 4430 8774 4416 8780
          4412 8793
WIND...HAIL 60MPH 1.00IN

$$

KALLAS

3 follow-up statements

896 
WWUS53 KGRB 260106
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
806 PM CDT WED JUL 25 2012

WIC071-260130-
/O.CON.KGRB.SV.W.0071.000000T0000Z-120726T0130Z/
MANITOWOC WI-
806 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MANITOWOC
COUNTY UNTIL 830 PM CDT...

AT 805 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM TWO CREEKS TO MANITOWOC TO
VALDERS...MOVING EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  CLEVELAND AROUND 820 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE OSMAN...
CLOVER AND NEWTON.

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.

TO REPORT SEVERE WEATHER...CONTACT THE NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GREEN BAY.

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

&&

LAT...LON 4413 8805 4416 8804 4418 8792 4424 8791
      4424 8789 4433 8788 4433 8753 4429 8753
      4423 8750 4417 8752 4410 8764 4400 8767
      4392 8772 4390 8774
TIME...MOT...LOC 0106Z 290DEG 37KT 4430 8751 4411 8761
          4405 8786
WIND...HAIL 60MPH 1.00IN

$$

KALLAS

556 
WWUS53 KGRB 260114
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
814 PM CDT WED JUL 25 2012

WIC071-260130-
/O.CON.KGRB.SV.W.0071.000000T0000Z-120726T0130Z/
MANITOWOC WI-
814 PM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MANITOWOC
COUNTY UNTIL 830 PM CDT...

AT 810 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM TWO CREEKS TO MANITOWOC TO
VALDERS...MOVING EAST AT 40 MPH.

IN ADDITION...A 68 MPH WIND GUST WAS REPORTED AT THE AIRPORT IN 
MANITOWOC WITH THESE STORMS.

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.

TO REPORT SEVERE WEATHER...CONTACT THE NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GREEN BAY.

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

&&

LAT...LON 4404 8793 4433 8753 4429 8753 4423 8750
      4417 8752 4410 8764 4400 8767 4392 8772
      4390 8774
TIME...MOT...LOC 0113Z 290DEG 37KT 4427 8741 4408 8752
          4402 8777
WIND...HAIL 70MPH 1.00IN

$$

KALLAS

172 
WWUS53 KGRB 260126
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
826 PM CDT WED JUL 25 2012

WIC071-260136-
/O.EXP.KGRB.SV.W.0071.000000T0000Z-120726T0130Z/
MANITOWOC WI-
826 PM CDT WED JUL 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR MANITOWOC COUNTY WILL EXPIRE
AT 830 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED 
OUT OF THE WARNED AREA. HOWEVER...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 200 AM CDT!

LAT...LON 4404 8793 4433 8753 4429 8753 4423 8750
      4417 8752 4410 8764 4400 8767 4392 8772
      4390 8774
TIME...MOT...LOC 0126Z 290DEG 37KT 4422 8723 4403 8735
          4397 8760

$$

KALLAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:40 PM CDT	Special Marine Warning	GRB		80 min
Jul 26, 1:21 AM CDT	Severe Thunderstorm Warning	GRB	Calumet, Manitowoc	39 min
Jul 26, 1:31 AM CDT	Special Marine Warning	GRB		47 min
Jul 26, 2:13 PM CDT	Special Marine Warning	GRB		73 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every 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.