Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 8, NWS Green Bay, WI

May 20, 2012Langlade County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 20, 2012, 2:53 PM CDT for Langlade County, Wisconsin. It was in force for 67 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: May 20, 2012, 2:53 PM CDT (19:53 UTC)
Expired: May 20, 2012, 4:00 PM CDT
In force: 67 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Langlade County, WI

The radar

The Green Bay radar (KGRB), 104 km from the middle of the area, began a volume at 19:54 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.

Issued	Product	Office	Lasted
May 20, 12:24 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.9 hours before the alert went out and 106 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: 752 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1614 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 31 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.

642 
WUUS53 KGRB 201953
SVRGRB
WIC067-202100-
/O.NEW.KGRB.SV.W.0008.120520T1953Z-120520T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
253 PM CDT SUN MAY 20 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN LANGLADE COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 400 PM CDT

* AT 249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL AND DAMAGING WINDS. THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 12 MILES NORTHWEST OF PEARSON TO 10 MILES SOUTHEAST
  OF ANTIGO...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PEARSON...WHITE LAKE...POST LAKE...BRYANT...POLAR...ELTON...
  LANGLADE AND PICKEREL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DAMAGING WINDS. MOVE TO AN INTERIOR ROOM OF YOUR HOME
OR BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4546 8892 4538 8892 4538 8868 4521 8868
      4520 8866 4512 8864 4512 8898 4504 8898
      4503 8912 4547 8920
TIME...MOT...LOC 1953Z 209DEG 35KT 4552 8914 4505 8904
WIND...HAIL <50MPH 1.00IN

$$

TH

4 follow-up statements

360 
WWUS53 KGRB 202008
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
308 PM CDT SUN MAY 20 2012

WIC067-202100-
/O.CON.KGRB.SV.W.0008.000000T0000Z-120520T2100Z/
LANGLADE WI-
308 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
LANGLADE COUNTY UNTIL 400 PM CDT...

AT 307 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 CRANDON TO 5
MILES WEST OF WHITE LAKE...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  WHITE LAKE...LILY...HOLLISTER AND LANGLADE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. MOVE TO AN INTERIOR ROOM OF YOUR HOME OR
BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4546 8892 4538 8892 4538 8868 4521 8868
      4520 8866 4512 8864 4512 8898 4504 8898
      4503 8912 4547 8920
TIME...MOT...LOC 2008Z 222DEG 42KT 4556 8885 4518 8885
WIND...HAIL <50MPH 1.00IN

$$

TH

313 
WWUS53 KGRB 202029
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
329 PM CDT SUN MAY 20 2012

WIC067-202100-
/O.CON.KGRB.SV.W.0008.000000T0000Z-120520T2100Z/
LANGLADE WI-
329 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
LANGLADE COUNTY UNTIL 400 PM CDT...

AT 324 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 8 MILES NORTH
OF WHITE LAKE TO PEARSON...MOVING NORTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  PEARSON...ELCHO...PICKEREL AND POST LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. MOVE TO AN INTERIOR ROOM OF YOUR HOME OR
BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4546 8892 4538 8892 4538 8868 4521 8868
      4520 8866 4512 8864 4512 8898 4504 8898
      4503 8912 4547 8920
TIME...MOT...LOC 2029Z 208DEG 25KT 4530 8870 4536 8905
WIND...HAIL <50MPH 1.00IN

$$

TH

614 
WWUS53 KGRB 202048
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
348 PM CDT SUN MAY 20 2012

WIC067-202100-
/O.CON.KGRB.SV.W.0008.000000T0000Z-120520T2100Z/
LANGLADE WI-
348 PM CDT SUN MAY 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
LANGLADE COUNTY UNTIL 400 PM CDT...

AT 346 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR PEARSON...OR 13 MILES SOUTH OF CRANDON...
MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PICKEREL AND PEARSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE 
HAIL WITH DAMAGING WINDS POSSIBLE. MOVE TO AN INTERIOR ROOM OF YOUR 
HOME OR BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT 
DRIVE INTO AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4546 8892 4538 8892 4538 8868 4521 8868
      4520 8866 4512 8864 4512 8898 4504 8898
      4503 8912 4547 8920
TIME...MOT...LOC 2047Z 212DEG 38KT 4539 8895
WIND...HAIL <50MPH 1.00IN

$$

KALLAS

828 
WWUS53 KGRB 202052
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
352 PM CDT SUN MAY 20 2012

WIC067-202102-
/O.EXP.KGRB.SV.W.0008.000000T0000Z-120520T2100Z/
LANGLADE WI-
352 PM CDT SUN MAY 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN LANGLADE COUNTY WILL
EXPIRE AT 400 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT. 

LAT...LON 4546 8892 4538 8892 4538 8868 4521 8868
      4520 8866 4512 8864 4512 8898 4504 8898
      4503 8912 4547 8920
TIME...MOT...LOC 2052Z 212DEG 38KT 4543 8891

$$

TH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 1:32 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	58 min
May 20, 1:55 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	50 min
May 20, 2:40 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	65 min
May 20, 3:22 PM CDT	Severe Thunderstorm Warning	GRB	Forest	53 min
May 20, 3:56 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Oconto	49 min
May 20, 3:58 PM CDT	Severe Thunderstorm Warning	GRB	Florence	32 min
May 20, 4:10 PM CDT	Small Craft Advisory	GRB		5 hr
May 20, 4:21 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Marinette, Oconto	39 min
May 20, 4:56 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	17 min
May 20, 5:38 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.