Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 119, NWS Twin Cities, MN

July 10, 2011Dakota County, Goodhue County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 10, 2011, 5:32 AM CDT for Dakota County, Goodhue County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin. It was in force for 58 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
Jul 10, 2011, 5:32 AM CDT (10:32 UTC)
Expired
Jul 10, 2011, 6:30 AM CDT
In force
58 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
65.0 mph

Counties Dakota County, MN, Goodhue County, MN, Washington County, MN, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 70 km from the middle of the area, began a volume at 10:36 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.5 hours before the alert went out and 72 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 2011-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1607 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 2011-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
1607 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1076 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.9
Supercell composite
7.3

Open this sounding in Storm Lab

The text

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

034 
WUUS53 KMPX 101032
SVRMPX
MNC037-049-163-WIC093-109-101130-
/O.NEW.KMPX.SV.W.0119.110710T1032Z-110710T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
532 AM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTHWESTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 630 AM CDT

* AT 531 AM CDT...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 WOODBURY TO
  MIESVILLE TO DENNISON...AND MOVING EAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  RED WING...
  RIVER FALLS...
  ELLSWORTH...
  WOODBURY...
  HASTINGS...
  MIESVILLE...
  CANNON FALLS...
  COTTAGE GROVE...
  DENNISON...
  NEWPORT...
  ST PAUL PARK...
  PRESCOTT...
  WELCH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4441 9304 4460 9287 4489 9302 4489 9298
      4498 9298 4503 9244 4466 9222 4445 9240
      4445 9242 4436 9247 4430 9304
TIME...MOT...LOC 1032Z 263DEG 18KT 4490 9289 4461 9273
          4438 9295
WIND...HAIL 65MPH <.75IN

$$
1 follow-up statement
107 
WWUS53 KMPX 101121
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
621 AM CDT SUN JUL 10 2011

MNC037-163-101136-
/O.CAN.KMPX.SV.W.0119.000000T0000Z-110710T1130Z/
DAKOTA MN-WASHINGTON MN-
621 AM CDT SUN JUL 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WASHINGTON AND
EASTERN DAKOTA COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF
THE WARNED AREA.

LAT...LON 4434 9271 4456 9258 4470 9250 4500 9267
      4503 9244 4466 9222 4445 9240 4445 9242
      4436 9247
TIME...MOT...LOC 1121Z 263DEG 18KT 4495 9246 4466 9230
          4443 9253

$$

MNC049-WIC093-109-101130-
/O.CON.KMPX.SV.W.0119.000000T0000Z-110710T1130Z/
GOODHUE MN-ST. CROIX WI-PIERCE WI-
621 AM CDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
PIERCE...SOUTH CENTRAL ST. CROIX AND EAST CENTRAL GOODHUE COUNTIES
UNTIL 630 AM CDT...

AT 617 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
HAMMOND TO 6 MILES NORTHEAST OF ESDAILE TO GOODHUE...MOVING EAST AT
20 MPH.

LOCATIONS IMPACTED INCLUDE...
  HAMMOND AND MAIDEN ROCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4434 9271 4456 9258 4470 9250 4500 9267
      4503 9244 4466 9222 4445 9240 4445 9242
      4436 9247
TIME...MOT...LOC 1121Z 263DEG 18KT 4495 9246 4466 9230
          4443 9253
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 3:15 AM CDTSpecial Weather StatementMPXWatonwan60 min
Jul 10, 4:06 AM CDTSpecial Weather StatementMPXScott39 min
Jul 10, 4:22 AM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Scott, Sibley68 min
Jul 10, 4:56 AM CDTAreal Flood AdvisoryMPXCarver, Dakota, Le Sueur, Rice, Scott, Sibley3 hr
Jul 10, 5:27 AM CDTSpecial Weather StatementMPXGoodhue63 min
Jul 10, 6:08 AM CDTFlash Flood WarningMPXCarver, Hennepin, Ramsey89 min
Jul 10, 6:34 PM CDTSpecial Weather StatementMPXDouglas, Kandiyohi, Pope, Stearns, Stevens, Swift and 1 more86 min
Jul 10, 6:44 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stevens61 min
Jul 10, 6:16 AM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce, Saint Croix59 min
Jul 10, 7:28 AM CDTSpecial Weather StatementMPXChippewa, Eau Claire47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Severe Thunderstorm Warnings in Wisconsin, 2011Every severe thunderstorm warning in 2011

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.