Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 323, NWS Twin Cities, MN

August 14, 2007Goodhue County, Minnesota; Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 14, 2007, 12:29 AM CDT for Goodhue County, Minnesota; Pierce County, Wisconsin. It was in force for 48 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 14, 2007, 12:29 AM CDT (05:29 UTC)
Expired
Aug 14, 2007, 1:17 AM CDT
In force
48 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Goodhue County, MN, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 05:29 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 13, 6:59 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.5 hours before the alert went out and 90 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 2007-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2096 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 00:00Z on 2007-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 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
2096 J/kg
Mixed-layer CIN
-245 J/kg
Mixed-layer LCL
1133 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
263 m²/s²
0-3 km storm-relative helicity
409 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 140530
SVRMPX
MNC049-WIC093-140630-
/O.NEW.KMPX.SV.W.0323.070814T0529Z-070814T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1229 AM CDT TUE AUG 14 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 130 AM CDT

* AT 1225 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 65 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 8 MILES NORTH OF PLUM CITY TO 6 MILES
  NORTHEAST OF ZUMBROTA TO 8 MILES NORTH OF KENYON...AND MOVING
  SOUTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PLUM CITY...
  KENYON...
  HADER...
  ZUMBROTA...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT
TUESDAY MORNING FOR SOUTHERN MINNESOTA.

LAT...LON 4485 9217 4469 9250 4452 9281 4443 9304
      4423 9300 4422 9261 4443 9250 4456 9216

$$
2 follow-up statements
000 
WWUS53 KMPX 140551
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1251 AM CDT TUE AUG 14 2007

WIC093-140601-
/O.CAN.KMPX.SV.W.0323.000000T0000Z-070814T0630Z/
PIERCE WI-
1251 AM CDT TUE AUG 14 2007

...THE SEVERE THUNDERSTORM WARNING FOR PIERCE COUNTY IS CANCELLED...

LAT...LON 4458 9258 4448 9260 4437 9276 4437 9303
      4421 9302 4422 9261 4443 9250 4448 9235

$$

MNC049-140630-
/O.CON.KMPX.SV.W.0323.000000T0000Z-070814T0630Z/
GOODHUE MN-
1251 AM CDT TUE AUG 14 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR GOODHUE COUNTY...

AT 1246 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 14 MILES NORTHEAST OF GOODHUE TO 5 MILES EAST OF
GOODHUE TO 4 MILES SOUTH OF WANAMINGO...AND MOVING SOUTHEAST AT 40
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE HADER...BOMBAY...ZUMBROTA...
WANAMINGO...KENYON AND GOODHUE.

LAT...LON 4458 9258 4448 9260 4437 9276 4437 9303
      4421 9302 4422 9261 4443 9250 4448 9235

$$
000 
WWUS53 KMPX 140617
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
116 AM CDT TUE AUG 14 2007

MNC049-140626-
/O.CAN.KMPX.SV.W.0323.000000T0000Z-070814T0630Z/
GOODHUE MN-
116 AM CDT TUE AUG 14 2007

...THE SEVERE THUNDERSTORM WARNING FOR GOODHUE COUNTY IS CANCELLED...

RADAR INDICATED THAT THUNDERSTORMS HAD WEAKENED AND ARE MOVING OUT 
OF THE WARNED AREA. THUS THE WARNING HAS BEEN CANCELLED. 

LAT...LON 4458 9258 4448 9260 4437 9276 4437 9303
      4421 9302 4422 9261 4443 9250 4448 9235

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 7:44 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs61 min
Aug 13, 7:57 PM CDTSevere Thunderstorm WarningMPXMorrison18 min
Aug 13, 8:08 PM CDTSevere Thunderstorm WarningMPXKanabec52 min
Aug 13, 8:17 PM CDTSevere Thunderstorm WarningMPXIsanti, Sherburne58 min
Aug 13, 8:43 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago62 min
Aug 13, 8:47 PM CDTSevere Thunderstorm WarningMPXStearns, Todd58 min
Aug 13, 8:52 PM CDTTornado WarningMPXAnoka, Sherburne23 min
Aug 13, 9:15 PM CDTSevere Thunderstorm WarningMPXHennepin, Ramsey, Washington60 min
Aug 13, 9:45 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright60 min
Aug 13, 10:42 PM CDTSevere Thunderstorm WarningMPXHennepin, Wright63 min
Aug 13, 10:46 PM CDTFlash Flood WarningMPXHennepin119 min
Aug 13, 11:30 PM CDTSevere Thunderstorm WarningMPXWashington60 min
Aug 13, 11:37 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue53 min
Aug 13, 11:48 PM CDTFlash Flood WarningMPXDakota, Scott117 min
Aug 13, 11:51 PM CDTSevere Thunderstorm WarningMPXScott29 min
Aug 14, 12:26 AM CDTFlash Flood WarningMPXGoodhue2 hr
Aug 13, 10:00 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce60 min
Aug 13, 10:15 PM CDTSevere Thunderstorm WarningMPXSaint Croix30 min
Aug 13, 10:21 PM CDTSevere Thunderstorm WarningMPXChippewa, Eau Claire54 min
Aug 13, 11:10 PM CDTSevere Thunderstorm WarningMPXEau Claire31 min
Aug 14, 12:05 AM CDTSevere Thunderstorm WarningMPXDunn, Pepin55 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.