Alert archive / Iowa / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 40, NWS La Crosse, WI

June 8, 2011Grant County, Wisconsin; Clayton County, Fayette County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 8, 2011, 6:02 PM CDT for Grant County, Wisconsin; Clayton County, Fayette County, Iowa. It was in force for 58 min. 7 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: Jun 8, 2011, 6:02 PM CDT (23:02 UTC)
Expired: Jun 8, 2011, 7:00 PM CDT
In force: 58 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Clayton County, IA, Fayette County, IA, Grant County, WI

The radar

The La Crosse radar (KARX), 122 km from the middle of the area, began a volume at 23:02 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
Jun 8, 6:10 PM CDT	HAIL 1	Strawberry Point, IA
Jun 8, 6:10 PM CDT	HAIL 1.75	3 Nne Strawberry Point, IA
Jun 8, 6:10 PM CDT	HAIL 1.75	Garnavillo, IA
Jun 8, 6:15 PM CDT	HAIL 1	Strawberry Point, IA
Jun 8, 6:18 PM CDT	HAIL 0.75	Bagley, WI
Jun 8, 6:36 PM CDT	HAIL 1	Glen Haven, WI
Jun 8, 6:40 PM CDT	HAIL 1	Bloomington, WI

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
Jun 8, 4:49 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 138 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: 1876 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 76 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.

835 
WUUS53 KARX 082302
SVRARX
IAC043-065-WIC043-090000-
/O.NEW.KARX.SV.W.0040.110608T2302Z-110609T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
602 PM CDT WED JUN 8 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CLAYTON COUNTY IN NORTHEAST IOWA...
  SOUTHEASTERN FAYETTE COUNTY IN NORTHEAST IOWA...
  WESTERN GRANT COUNTY IN SOUTHWEST WISCONSIN...

* UNTIL 700 PM CDT

* AT 557 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  LINE OF SEVERE THUNDERSTORM EXTENDING FROM MOTOR TO VOLGA TO NEAR  
  STANLEY...MOVING EAST AT 35 MPH. THIS STORM CAN PRODUCE PING       
  PONG BALL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  THOMASVILLE AROUND 605 PM...
  STRAWBERRY POINT AND VOLGA AROUND 610 PM...
  HIGHWAY 13 AND COUNTY C 24 AROUND 615 PM...
  EDGEWOOD AND BIXBY STATE PARK AROUND 620 PM...
  ELKADER AND WOOD AROUND 625 PM...
  ELKPORT AND UPDEGRAFF AROUND 630 PM...
  FAIRVIEW AROUND 635 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4272 9180 4303 9090 4265 9081 4267 9089
      4264 9090 4264 9176
TIME...MOT...LOC 2301Z 256DEG 32KT 4265 9162
WIND...HAIL 60MPH 1.50IN

$$

JW

2 follow-up statements

545 
WWUS53 KARX 082314
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
614 PM CDT WED JUN 8 2011

IAC043-065-WIC043-090000-
/O.CON.KARX.SV.W.0040.000000T0000Z-110609T0000Z/
FAYETTE IA-CLAYTON IA-GRANT WI-
614 PM CDT WED JUN 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
GRANT...SOUTHERN CLAYTON AND SOUTHEASTERN FAYETTE COUNTIES UNTIL 700
PM CDT...

AT 607 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE THUNDERSTORMS LOCATED FROM NEAR BAGLEY TO GARBER TO 
JOY SPRINGS COUNTY PARK...MOVING EAST AT 35 MPH. THESE STORMS ARE 
CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL AND DAMAGING WINDS IN 
EXCESS OF 60 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  STRAWBERRY POINT...
  UPDEGRAFF...
  GUTTENBERG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR 
LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM WEDNESDAY
EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN.

&&

LAT...LON 4272 9180 4303 9090 4265 9081 4267 9089
      4264 9090 4264 9176
TIME...MOT...LOC 2309Z 256DEG 32KT 4267 9153
WIND...HAIL 60MPH 1.50IN

$$

JW

045 
WWUS53 KARX 082343
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
643 PM CDT WED JUN 8 2011

IAC065-082352-
/O.CAN.KARX.SV.W.0040.000000T0000Z-110609T0000Z/
FAYETTE IA-
643 PM CDT WED JUN 8 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FAYETTE COUNTY IS
CANCELLED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
WEDNESDAY EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN.

LAT...LON 4281 9152 4303 9090 4265 9081 4267 9089
      4264 9090 4264 9151
TIME...MOT...LOC 2342Z 256DEG 32KT 4282 9095

$$

IAC043-WIC043-090000-
/O.CON.KARX.SV.W.0040.000000T0000Z-110609T0000Z/
CLAYTON IA-GRANT WI-
643 PM CDT WED JUN 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN GRANT
AND SOUTHERN CLAYTON COUNTIES UNTIL 700 PM CDT...

EMERGENCY MANAGEMENT OFFICIALS REPORTED QUARTER SIZE HAIL IN 
BLOOMINGTON AT 640 PM CDT.

AT 639 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR NORTH ANDOVER...OR 6 MILES EAST
OF GUTTENBERG...MOVING EAST AT 35 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM WEDNESDAY
EVENING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN.

&&

LAT...LON 4281 9152 4303 9090 4265 9081 4267 9089
      4264 9090 4264 9151
TIME...MOT...LOC 2342Z 256DEG 32KT 4282 9095
WIND...HAIL 60MPH 1.00IN

$$

JW

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 4:53 PM CDT	Severe Thunderstorm Warning	ARX	Grant	37 min
Jun 8, 5:28 PM CDT	Severe Thunderstorm Warning	ARX	Grant	47 min
Jun 8, 6:38 PM CDT	Severe Thunderstorm Warning	ARX	Grant	52 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2011 Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.