Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 283, NWS Twin Cities, MN

August 11, 2007Pierce County, Saint Croix County, Wisconsin; Goodhue County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2007, 3:51 AM CDT for Pierce County, Saint Croix County, Wisconsin; Goodhue County, Minnesota. It was in force for 54 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
Aug 11, 2007, 3:51 AM CDT (08:51 UTC)
Expired
Aug 11, 2007, 4:45 AM CDT
In force
54 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

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

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 08:52 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 11, 1:31 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.9 hours before the alert went out and 91 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2007-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 639 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2007-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
639 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1768 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 110851
SVRMPX
MNC049-WIC093-109-110945-
/O.NEW.KMPX.SV.W.0283.070811T0851Z-070811T0945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
351 AM CDT SAT AUG 11 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 445 AM CDT

* AT 347 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF
  75 MPH. SIREN ACTIVATION IS SUGGESTED.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 9 MILES WEST OF SOMERSET TO 13 MILES
  SOUTHWEST OF RIVER FALLS TO 28 MILES WEST OF RED WING...AND MOVING
  EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SOMERSET...
  RIVER FALLS...
  NEW RICHMOND...
  ELLSWORTH...
  RED WING...
  BALDWIN...
  BAY CITY...
  SPRING VALLEY...
  PLUM CITY...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 4519 9271 4445 9272 4447 9231 4457 9234
      4457 9217 4520 9219

$$
1 follow-up statement
000 
WWUS53 KMPX 110944
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
443 AM CDT SAT AUG 11 2007

MNC049-WIC093-109-110953-
/O.EXP.KMPX.SV.W.0283.000000T0000Z-070811T0945Z/
GOODHUE MN-ST. CROIX WI-PIERCE WI-
443 AM CDT SAT AUG 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR PIERCE...ST. CROIX AND GOODHUE
COUNTIES EXPIRES AT 445 AM CDT...

SEVERE STORMS HAVE MOVED OUT OF THE AREA. WIND GUSTS TO 40 MPH WILL 
CONTINUE TO BE POSSIBLE THROUGH 500 AM CDT.

LAT...LON 4519 9271 4445 9272 4447 9231 4457 9234
      4457 9217 4520 9219

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 4:27 AM CDTSevere Thunderstorm WarningMPXDunn, Pepin63 min
Aug 11, 5:17 AM CDTSevere Thunderstorm WarningMPXEau Claire32 min
Aug 10, 11:53 PM CDTSevere Thunderstorm WarningMPXLac qui Parle67 min
Aug 10, 11:59 PM CDTSevere Thunderstorm WarningMPXDouglas46 min
Aug 11, 12:16 AM CDTSevere Thunderstorm WarningMPXStevens59 min
Aug 11, 12:28 AM CDTSevere Thunderstorm WarningMPXSwift62 min
Aug 11, 12:34 AM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi56 min
Aug 11, 12:52 AM CDTSevere Thunderstorm WarningMPXPope53 min
Aug 11, 1:07 AM CDTSevere Thunderstorm WarningMPXStearns53 min
Aug 11, 1:27 AM CDTSevere Thunderstorm WarningMPXDouglas, Todd44 min
Aug 11, 1:34 AM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Swift56 min
Aug 11, 1:47 AM CDTSevere Thunderstorm WarningMPXMorrison58 min
Aug 11, 1:54 AM CDTSevere Thunderstorm WarningMPXMeeker66 min
Aug 11, 1:57 AM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Stearns, Wright63 min
Aug 11, 2:01 AM CDTSevere Thunderstorm WarningMPXRenville59 min
Aug 11, 2:33 AM CDTSevere Thunderstorm WarningMPXCarver, McLeod57 min
Aug 11, 2:44 AM CDTSevere Thunderstorm WarningMPXHennepin61 min
Aug 11, 2:53 AM CDTFlash Flood WarningMPXAnoka, Hennepin, Ramsey3 hr
Aug 11, 2:53 AM CDTFlash Flood WarningMPXAnoka, Dakota, Hennepin, Ramsey3 hr
Aug 11, 3:01 AM CDTSevere Thunderstorm WarningMPXWright29 min
Aug 11, 3:07 AM CDTFlash Flood WarningMPXWright113 min
Aug 11, 3:15 AM CDTSevere Thunderstorm WarningMPXSibley44 min
Aug 11, 3:27 AM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington63 min
Aug 11, 3:40 AM CDTFlash Flood WarningMPXScott65 min
Aug 11, 4:39 AM CDTSevere Thunderstorm WarningMPXLe Sueur39 min
Aug 11, 6:04 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright56 min
Aug 11, 6:39 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod66 min
Aug 11, 6:56 PM CDTSevere Thunderstorm WarningMPXWright49 min
Aug 11, 6:58 PM CDTSevere Thunderstorm WarningMPXHennepin62 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2007Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007

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.