Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 227, NWS Twin Cities, MN

July 25, 2008Polk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 25, 2008, 2:16 PM CDT for Polk County, Wisconsin. It was in force for 41 min. 2 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, 2008, 2:16 PM CDT (19:16 UTC)
Expired: Jul 25, 2008, 2:57 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Polk County, WI

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 19:16 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, 2:20 PM CDT	HAIL 0.25	2 Sse Frederic, WI
Jul 25, 2:20 PM CDT	HAIL 0.75	1 S Frederic, WI	HAIL COVERED GROUND.

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, 1:19 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.3 hours before the alert went out and 129 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: 1404 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 251916
SVRMPX
WIC095-252015-
/O.NEW.KMPX.SV.W.0227.080725T1916Z-080725T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
216 PM CDT FRI JUL 25 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN POLK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 315 PM CDT

* AT 212 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
  THIS STORM WAS LOCATED 5 MILES WEST OF FREDERIC...OR ABOUT 15 MILES
  NORTH OF BALSAM LAKE...AND MOVING SOUTHEAST AT 25 MPH.

* SOME LOCATIONS INCLUDE...
  FREDERIC...
  LUCK...
  MILLTOWN...
  CLAM FALLS...
  BALSAM LAKE...
  MCKINLEY...
  CLAYTON...

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

LAT...LON 4563 9216 4528 9218 4560 9275 4566 9269
      4565 9259 4574 9251 4574 9239 4569 9216
      4567 9213
TIME...MOT...LOC 1916Z 307DEG 21KT 4564 9254

$$

TRH

2 follow-up statements

000 
WWUS53 KMPX 251945
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
245 PM CDT FRI JUL 25 2008

WIC095-252015-
/O.CON.KMPX.SV.W.0227.000000T0000Z-080725T2015Z/
POLK WI-
245 PM CDT FRI JUL 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR NORTHERN POLK COUNTY...

AT 244 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS OF
60 MPH.  THE SEVERE STORM WAS LOCATED 6 MILES SOUTHWEST OF
MCKINLEY...AND MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE RANGE...MCKINLEY...JOEL...
CUSHING...MILLTOWN...LUCK...FREDERIC AND BALSAM LAKE.

PREPARE IMMEDIATELY FOR DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER
NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY
EVENING FOR NORTHWEST WISCONSIN.

LAT...LON 4534 9220 4560 9275 4562 9273 4565 9270
      4565 9259 4574 9251 4562 9216 4543 9216
      4542 9218 4541 9216 4536 9217
TIME...MOT...LOC 1945Z 306DEG 27KT 4550 9226

$$

TRH

000 
WWUS53 KMPX 251957
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
257 PM CDT FRI JUL 25 2008

WIC095-252007-
/O.CAN.KMPX.SV.W.0227.000000T0000Z-080725T2015Z/
POLK WI-
257 PM CDT FRI JUL 25 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN POLK COUNTY IS
CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED AND MOVED OUT OF
THE WARNED AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED. HOWEVER...ADDITIONAL THUNDERSTORMS WILL MOVE ACROSS THE 
AREA THROUGH 315 PM CDT...AND COULD PRODUCE WIND GUSTS TO 40 MPH AND 
HAIL TO DIME SIZE IN DIAMETER.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY
EVENING FOR NORTHWEST WISCONSIN.

LAT...LON 4534 9220 4560 9275 4562 9273 4565 9270
      4565 9259 4574 9251 4562 9216 4543 9216
      4542 9218 4541 9216 4536 9217
TIME...MOT...LOC 1957Z 306DEG 27KT 4545 9216

$$

TRH

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 25, 3:31 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn	59 min
Jul 25, 3:36 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	54 min
Jul 25, 3:51 PM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	54 min
Jul 25, 4:22 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa	38 min
Jul 25, 4:45 PM CDT	Severe Thunderstorm Warning	MPX	Pepin, Pierce	45 min
Jul 25, 5:35 PM CDT	Severe Thunderstorm Warning	MPX	Pierce	25 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2008 Every severe thunderstorm warning in 2008

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.