Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 38, NWS Twin Cities, MN

May 23, 2007Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 23, 2007, 4:29 PM CDT for Saint Croix County, Wisconsin. It was in force for 61 min. 1 report 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
May 23, 2007, 4:29 PM CDT (21:29 UTC)
Expired
May 23, 2007, 5:30 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 96 km from the middle of the area, began a volume at 21:31 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

TimeReportWhereRemark
May 23, 5:04 PM CDTTSTM WND DMGHammond, WI3-5 INCH BRANCHES DOWN. MEASURED WIND GUST OF 46MPH.

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.

IssuedProductOfficeLasted
May 23, 2:58 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 98 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 12:00Z on 2007-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2007-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 square meters per square second.193958Sfc1 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
84 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
164 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.

000 
WUUS53 KMPX 232130
SVRMPX
WIC109-232230-
/O.NEW.KMPX.SV.W.0038.070523T2129Z-070523T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
429 PM CDT WED MAY 23 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 530 PM CDT

* AT 429 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS.  THIS STORM 
  EXTENDED FROM THE NEW RICHMOND AREA...TO JUST SOUTHEAST OF HUDSON.
  IT WAS MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BALDWIN...
  HAMMOND...
  DEER PARK...
  GLENWOOD CITY...
  ROBERTS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4488 9237 4486 9239 4487 9273 4521 9273
      4520 9218 4500 9218 4498 9216 4487 9217

$$
DWE/TDK
2 follow-up statements
000 
WWUS53 KMPX 232205
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
503 PM CDT WED MAY 23 2007

WIC109-232230-
/O.CON.KMPX.SV.W.0038.000000T0000Z-070523T2230Z/
ST. CROIX WI-
503 PM CDT WED MAY 23 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR ST. CROIX COUNTY...

AT 502 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE SEVERE 
THUNDERSTORMS...CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. 
THE STORMS WERE LOCATED FROM 6 MILES NORTHEAST OF BALDWIN TO 10 
MILES NORTH OF FOREST.  THE STORMS WERE MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE HERSEY...FOREST...EMERALD...
CYLON...WOODVILLE...WILSON...HAMMOND...DEER PARK AND BALDWIN.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4488 9237 4486 9239 4486 9256 4522 9252
      4520 9218 4500 9218 4498 9216 4486 9214

$$
DWE/TDK
000 
WWUS53 KMPX 232224
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
525 PM CDT WED MAY 23 2007

WIC109-232235-
/O.EXP.KMPX.SV.W.0038.000000T0000Z-070523T2230Z/
ST. CROIX WI-
525 PM CDT WED MAY 23 2007

...THE SEVERE THUNDERSTORM WARNING FOR ST. CROIX COUNTY EXPIRES AT
530 PM CDT...

SEVERE STORMS WERE MOVING OUT OF EASTERN ST CROIX COUNTY... AND 
ADDITIONAL DEVELOPMENT IS NOT EXPECTED.  THEREFORE THE SEVERE 
THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 530 PM. STRONG AND 
DAMAGING WINDS LIKELY OCCURED AS THE STORMS MOVED THROUGH.

LAT...LON 4488 9237 4486 9239 4486 9256 4522 9252
      4520 9218 4500 9218 4498 9216 4486 9214

$$
DWE/TDK

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 3:22 PM CDTSevere Thunderstorm WarningMPXPolk53 min
May 23, 4:07 PM CDTTornado WarningMPXPolk38 min
May 23, 4:24 PM CDTSevere Thunderstorm WarningMPXBarron66 min
May 23, 4:31 PM CDTSevere Thunderstorm WarningMPXPierce59 min
May 23, 4:48 PM CDTTornado WarningMPXPolk27 min
May 23, 5:12 PM CDTSevere Thunderstorm WarningMPXDunn63 min
May 23, 5:27 PM CDTSevere Thunderstorm WarningMPXBarron48 min
May 23, 6:04 PM CDTSevere Thunderstorm WarningMPXChippewa, Rusk56 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.