Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 320, NWS Twin Cities, MN

August 13, 2007Dakota County, Goodhue County, Minnesota; Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 13, 2007, 11:37 PM CDT for Dakota County, Goodhue County, Minnesota; Pierce County, Wisconsin. It was in force for 53 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
Aug 13, 2007, 11:37 PM CDT (04:37 UTC)
Expired
Aug 14, 2007, 12:30 AM CDT
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Dakota County, MN, Goodhue County, MN, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 75 km from the middle of the area, began a volume at 04:39 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
Aug 13, 11:50 PM CDTHAIL 0.75Lakeville, MNAT INTERSECTION OF COUNTY ROAD 46 AND 165TH ST.

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
Aug 13, 6:59 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.6 hours before the alert went out and 78 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2007-08-14The 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 140437
SVRMPX
MNC037-049-WIC093-140530-
/O.NEW.KMPX.SV.W.0320.070814T0437Z-070814T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1137 PM CDT MON AUG 13 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 1230 AM CDT

* AT 1135 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 65 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 6 MILES NORTH OF PRESCOTT TO PRESCOTT
  TO 10 MILES WEST OF HASTINGS...AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RIVER FALLS...
  ELLSWORTH...
  RED WING...
  BAY CITY...

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 4486 9275 4474 9280 4468 9327 4446 9247
      4458 9222 4484 9215

$$
2 follow-up statements
000 
WWUS53 KMPX 140453
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1153 PM CDT MON AUG 13 2007

MNC037-049-WIC093-140530-
/O.CON.KMPX.SV.W.0320.000000T0000Z-070814T0530Z/
DAKOTA MN-GOODHUE MN-PIERCE WI-
1153 PM CDT MON AUG 13 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR PIERCE...GOODHUE AND DAKOTA COUNTIES...

AT 1151 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 65 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM BELDENVILLE TO 5 MILES SOUTH OF ELLSWORTH TO
LAKEVILLE...AND MOVING EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE MARTEL...HAGER CITY...
ESDAILE...DIAMOND BLUFF...BELDENVILLE...WELCH...VERMILLION...
ROSEMOUNT...RED WING AND NEW TRIER.

LAT...LON 4486 9275 4474 9280 4480 9329 4463 9330
      4446 9247 4458 9222 4484 9215

$$
000 
WWUS53 KMPX 140520
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1218 AM CDT TUE AUG 14 2007

MNC037-049-WIC093-140530-
/O.CON.KMPX.SV.W.0320.000000T0000Z-070814T0530Z/
DAKOTA MN-GOODHUE MN-PIERCE WI-
1218 AM CDT TUE AUG 14 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR PIERCE...GOODHUE AND DAKOTA COUNTIES...

AT 1217 AM CDT... NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 
65 MPH WILL CONTINUE TO BE POSSIBLE.  THESE STORMS WERE LOCATED 
ALONG A LINE EXTENDING FROM 10 MILES NORTHEAST OF MAIDEN ROCK TO 5 
MILES SOUTHWEST OF FRONTENAC TO 5 MILES SOUTHEAST OF STANTON...AND 
MOVING EAST AT 40 MPH. AREAS NEAR CANNON FALLS AND STANTON HAVE THE 
GREATEST RISK FOR NICKEL SIZE HAIL.

OTHER LOCATIONS IN THE WARNING INCLUDE HAGER CITY...ESDAILE...DIAMOND
BLUFF...BELDENVILLE...WELCH...WASTEDO...STANTON...RANDOLPH...HADER
AND FRONTENAC.

LAT...LON 4478 9271 4474 9280 4460 9304 4450 9320
      4423 9269 4458 9222 4484 9215

$$

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, 11:48 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 14, 12:29 AM CDTSevere Thunderstorm WarningMPXGoodhue48 min
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.