Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 266, NWS Twin Cities, MN

August 10, 2007Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 10, 2007, 11:59 PM CDT for Douglas County, Minnesota. It was in force for 46 min. 2 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
Aug 10, 2007, 11:59 PM CDT (04:59 UTC)
Expired
Aug 11, 2007, 12:45 AM CDT
In force
46 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 199 km from the middle of the area, began a volume at 05:00 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 11, 12:15 AM CDTHAIL 1Millerville, MNALSO 4 INCH BRANCHES DOWN ALONG WITH SCATTERED LAWN FURNITURE.
Aug 11, 12:30 AM CDTHAIL 15 W Belle River, MNTIME IS ESTIMATED. HAIL WAS REPORTED AT LAKE CARLOS STATE PARK.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.0 hours before the alert went out and 197 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°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 110458
SVRMPX
MNC041-110545-
/O.NEW.KMPX.SV.W.0266.070811T0459Z-070811T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1159 PM CDT FRI AUG 10 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 1245 AM CDT

* AT 1155 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR BRANDON...OR ABOUT
  14 MILES NORTHWEST OF ALEXANDRIA...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GARFIELD...
  MILLERVILLE...
  LEAF VALLEY...
  CARLOS...
  MILTONA...
  BELLE RIVER...
  ROSE CITY...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4610 9575 4585 9573 4589 9515 4611 9516

$$

KAT
2 follow-up statements
000 
WWUS53 KMPX 110511
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1210 AM CDT SAT AUG 11 2007

MNC041-110545-
/O.CON.KMPX.SV.W.0266.000000T0000Z-070811T0545Z/
DOUGLAS MN-
1210 AM CDT SAT AUG 11 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR DOUGLAS COUNTY...

AT 1208 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 4 MILES NORTH OF
GARFIELD...OR ABOUT 5 MILES EAST OF BRANDON...AND MOVING NORTHEAST AT
25 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED JUST WEST OF 
ALEXANDRIA...AND ALSO MOVING NORTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE ROSE CITY...MELBY...LEAF
VALLEY...HOLMES...BELLE RIVER...OSAKIS...NELSON...MILTONA...
MILLERVILLE AND GARFIELD.

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 4610 9575 4577 9573 4578 9515 4611 9516

$$

KAT
000 
WWUS53 KMPX 110544
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1244 AM CDT SAT AUG 11 2007

MNC041-110554-
/O.EXP.KMPX.SV.W.0266.000000T0000Z-070811T0545Z/
DOUGLAS MN-
1244 AM CDT SAT AUG 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR DOUGLAS COUNTY EXPIRES AT 1245
AM CDT...

SEVERE STORMS HAD DECREASED IN INTENSITY AND MOVED OUT OF THE 
COUNTY. HOWEVER...MORE THUNDERSTORMS WERE LOCATED WEST OF THE 
AREA...SO REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS.

PRIOR TO WEAKENING AND MOVING OUT OF THE COUNTY...QUARTER SIZE HAIL 
WAS REPORTED AT LAKE CARLOS STATE PARK.

LAT...LON 4610 9575 4577 9573 4578 9515 4611 9516

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 11:53 PM CDTSevere Thunderstorm WarningMPXLac qui Parle67 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, 3:51 AM CDTSevere Thunderstorm WarningMPXGoodhue54 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 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.