Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 231, NWS Twin Cities, MN

July 25, 2008Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 25, 2008, 3:51 PM CDT for Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin. It was in force for 54 min. 3 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, 3:51 PM CDT (20:51 UTC)
Expired: Jul 25, 2008, 4:45 PM CDT
In force: 54 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Washington County, MN, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 20:52 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, 4:15 PM CDT	TSTM WND DMG	3 Wnw River Falls, WI	TREE DOWN ON CAR.
Jul 25, 4:20 PM CDT	TSTM WND GST 65	8 S Hudson, WI
Jul 25, 4:25 PM CDT	TSTM WND DMG	1 Wnw River Falls, WI	SEVERAL LARGE TREE LIMBS DOWN ACROSS UW-RIVER FALLS CAMPUS. ONE 10 INCH DIAMETER PINE TREE TOP SHEARED OFF.

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, 8.9 hours before the alert went out and 80 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 252051
SVRMPX
MNC163-WIC093-109-252145-
/O.NEW.KMPX.SV.W.0231.080725T2051Z-080725T2145Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...  
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...  
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 445 PM CDT

* AT 348 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
  THIS STORM WAS LOCATED 6 MILES SOUTH OF BAYPORT...OR ABOUT 9 MILES
  NORTHWEST OF RIVER FALLS...AND MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS INCLUDE...
  PRESCOTT...
  RIVER FALLS...
  DIAMOND BLUFF...
  ELLSWORTH...
  SPRING VALLEY...
  HAGER CITY...
  BAY CITY...
  ELMWOOD...
  PLUM CITY...
  MAIDEN ROCK...

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4454 9233 4458 9254 4472 9274 4477 9289
      4497 9298 4506 9279 4503 9276 4492 9275
      4486 9262 4486 9215 4455 9214
TIME...MOT...LOC 2050Z 315DEG 30KT 4493 9273

$$

TRH

2 follow-up statements

000 
WWUS53 KMPX 252114
SVSMPX

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

MNC163-252124-
/O.CAN.KMPX.SV.W.0231.000000T0000Z-080725T2145Z/
WASHINGTON MN-
414 PM CDT FRI JUL 25 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WASHINGTON COUNTY IS
CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD MOVED OUT OF THE WARNED 
AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4455 9214 4454 9233 4458 9253 4474 9280
      4482 9276 4491 9276 4492 9274 4504 9277
      4492 9273 4486 9262 4486 9215
TIME...MOT...LOC 2114Z 314DEG 34KT 4475 9251

$$

WIC093-109-252145-
/O.CON.KMPX.SV.W.0231.000000T0000Z-080725T2145Z/
ST. CROIX WI-PIERCE WI-
414 PM CDT FRI JUL 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR PIERCE AND SOUTHWESTERN ST. CROIX COUNTIES...

AT 409 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 3 MILES WEST OF BELDENVILLE...
OR ABOUT 10 MILES NORTH OF DIAMOND BLUFF...AND MOVING SOUTHEAST AT 30
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE MARTEL...HAGER CITY...
ESDAILE...BELDENVILLE...SPRING VALLEY...RIVER FALLS...PRESCOTT...PLUM
CITY...MAIDEN ROCK AND ELMWOOD.

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

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4455 9214 4454 9233 4458 9253 4474 9280
      4482 9276 4491 9276 4492 9274 4504 9277
      4492 9273 4486 9262 4486 9215
TIME...MOT...LOC 2114Z 314DEG 34KT 4475 9251

$$

TRH

000 
WWUS53 KMPX 252132
SVSMPX

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

WIC109-252142-
/O.CAN.KMPX.SV.W.0231.000000T0000Z-080725T2145Z/
ST. CROIX WI-
432 PM CDT FRI JUL 25 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ST. CROIX COUNTY
IS CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD MOVED OUT OF THE WARNED 
AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4455 9214 4454 9233 4456 9235 4455 9238
      4457 9243 4458 9253 4471 9273 4486 9262
      4486 9215
TIME...MOT...LOC 2132Z 311DEG 31KT 4470 9230

$$

WIC093-252145-
/O.CON.KMPX.SV.W.0231.000000T0000Z-080725T2145Z/
PIERCE WI-
432 PM CDT FRI JUL 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR PIERCE COUNTY...

AT 431 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 7 MILES NORTHWEST OF PLUM
CITY...AND MOVING SOUTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE MARTEL...HAGER CITY...
ESDAILE...DIAMOND BLUFF...BELDENVILLE...SPRING VALLEY...RIVER
FALLS...PLUM CITY...MAIDEN ROCK AND ELMWOOD.

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

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4455 9214 4454 9233 4456 9235 4455 9238
      4457 9243 4458 9253 4471 9273 4486 9262
      4486 9215
TIME...MOT...LOC 2132Z 311DEG 31KT 4470 9230

$$

TRH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 3:14 PM CDT	Severe Thunderstorm Warning	MPX	Washington	31 min
Jul 25, 5:09 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	48 min
Jul 25, 5:35 PM CDT	Severe Thunderstorm Warning	MPX	Washington	25 min
Jul 25, 2:16 PM CDT	Severe Thunderstorm Warning	MPX	Polk	41 min
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, 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

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2008 Severe Thunderstorm Warnings in Minnesota, 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.