Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 282, NWS Twin Cities, MN

August 11, 2007Dakota County, Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2007, 3:27 AM CDT for Dakota County, Ramsey County, Washington County, Minnesota. It was in force for 63 min. 5 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 11, 2007, 3:27 AM CDT (08:27 UTC)
Expired
Aug 11, 2007, 4:30 AM CDT
In force
63 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Dakota County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 37 km from the middle of the area, began a volume at 08:31 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
Aug 11, 3:30 AM CDTTSTM WND DMGSt Paul, MN3 INCH DIAMETER BRANCH THROUGH A WINDOW AT INTERSECTION OF LEXINGTON AND COMO.
Aug 11, 3:40 AM CDTTSTM WND GST 80Eagan, MN80 MPH WINDS ESTIMATED. TREES WERE BENDING OVER. TRASH BARRELS AND YARD FURNITURE STREWN ACROSS NEIGHBORHOOD. WINDS LASTED 4-5 MINUTES. TIME ESTIMATED.
Aug 11, 3:47 AM CDTTSTM WND DMGSt Paul, MN6 INCH DIAMETER OR LARGER TREES DOWN AT MARYLAND AVENUE AND INTERSTATE 35E.
Aug 11, 4:00 AM CDTTSTM WND DMGStillwater, MNPOWER LINES DOWN COUNTY WIDE. TIME ESTIMATED.
Aug 11, 4:02 AM CDTTSTM WND DMGSt Paul, MNTREE BRANCHES DOWN ON WEST 7TH STREET. TIME ESTIMATED.

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 11, 1:31 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.5 hours before the alert went out and 40 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 110826
SVRMPX
MNC037-123-163-110930-
/O.NEW.KMPX.SV.W.0282.070811T0827Z-070811T0930Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 430 AM CDT

* AT 322 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65
  MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES
  SOUTHWEST OF ROSEVILLE TO 12 MILES NORTHWEST OF LAKEVILLE...AND
  MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  VADNAIS HEIGHTS...
  ST PAUL...
  WHITE BEAR LAKE...
  EAGAN...
  WEST ST PAUL...
  APPLE VALLEY...
  NORTH ST PAUL...
  MAPLEWOOD...
  LAKEVILLE...
  SOUTH ST PAUL...

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 4506 9316 4483 9317 4478 9329 4464 9329
      4464 9279 4507 9281

$$
1 follow-up statement
000 
WWUS53 KMPX 110928
SVSMPX

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

MNC037-123-163-110938-
/O.EXP.KMPX.SV.W.0282.000000T0000Z-070811T0930Z/
WASHINGTON MN-RAMSEY MN-DAKOTA MN-
428 AM CDT SAT AUG 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR DAKOTA...RAMSEY AND WASHINGTON
COUNTIES EXPIRES AT 430 AM CDT...

WIDESPREAD WIND DAMAGE HAS BEEN REPORTED ACROSS THE EASTERN SUBURBS 
OF THE TWIN CITIES AS THESE STORMS MOVED THROUGH THE AREA.

SEVERE STORMS HAVE MOVED OUT OF THE AREA AND ADDITIONAL DEVELOPMENT
IS NOT EXPECTED.

LAT...LON 4506 9316 4483 9317 4478 9329 4464 9329
      4464 9279 4507 9281

$$

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 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, 3:40 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.