Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 161, NWS Twin Cities, MN

August 31, 20134 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 31, 2013, 7:27 PM CDT for 4 counties in Minnesota. It was in force for 33 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 31, 2013, 7:27 PM CDT (00:27 UTC)
Expired
Aug 31, 2013, 8:00 PM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties McLeod County, MN, Nicollet County, MN, Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 00:27 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 31, 2:49 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 86 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 2013-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1204 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 2013-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 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
1204 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1382 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

382 
WUUS53 KMPX 010027
SVRMPX
MNC085-103-129-143-010100-
/O.NEW.KMPX.SV.W.0161.130901T0027Z-130901T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
727 PM CDT SAT AUG 31 2013

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  CENTRAL RENVILLE COUNTY IN CENTRAL MINNESOTA...
  WESTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 800 PM CDT

* AT 722 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 16 MILES EAST OF OLIVIA TO 9 MILES NORTH OF FORT
  RIDGELY STATE PARK TO FORT RIDGELY STATE PARK...AND MOVING
  SOUTHEAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  GIBBON...ST GEORGE...FERNANDO...LAFAYETTE...WINTHROP AND KLOSSNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4434 9445 4436 9449 4439 9465 4443 9470
      4445 9478 4459 9473 4474 9472 4465 9425
      4444 9427 4428 9441
TIME...MOT...LOC 0027Z 295DEG 28KT 4471 9462 4455 9462
          4441 9473

HAIL...0.75IN
WIND...60MPH

$$
2 follow-up statements
636 
WWUS53 KMPX 010042
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
742 PM CDT SAT AUG 31 2013

MNC129-010052-
/O.CAN.KMPX.SV.W.0161.000000T0000Z-130901T0100Z/
RENVILLE MN-
742 PM CDT SAT AUG 31 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL RENVILLE COUNTY IS
CANCELLED...

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

LAT...LON 4434 9445 4436 9449 4439 9466 4448 9455
      4471 9454 4465 9425 4444 9427 4428 9441
TIME...MOT...LOC 0042Z 289DEG 31KT 4464 9440 4448 9441
          4434 9452

$$

MNC085-103-143-010100-
/O.CON.KMPX.SV.W.0161.000000T0000Z-130901T0100Z/
MCLEOD MN-NICOLLET MN-SIBLEY MN-
742 PM CDT SAT AUG 31 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
SIBLEY...NORTHWESTERN NICOLLET AND SOUTHWESTERN MCLEOD COUNTIES UNTIL
800 PM CDT...

AT 741 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 11 MILES NORTHWEST OF GAYLORD TO 11 MILES SOUTHWEST OF
GAYLORD TO NEW ULM...AND MOVING EAST AT 35 MPH.

HAZARD...70 MPH WIND GUSTS AND PENNY SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO MOBILE
         HOMES...ROOFS AND OUTBUILDINGS.

LOCATIONS IMPACTED INCLUDE...
LAFAYETTE...WINTHROP AND KLOSSNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4434 9445 4436 9449 4439 9466 4448 9455
      4471 9454 4465 9425 4444 9427 4428 9441
TIME...MOT...LOC 0042Z 289DEG 31KT 4464 9440 4448 9441
          4434 9452

HAIL...0.75IN
WIND...70MPH

$$
224 
WWUS53 KMPX 010058
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
758 PM CDT SAT AUG 31 2013

MNC085-103-143-010108-
/O.EXP.KMPX.SV.W.0161.000000T0000Z-130901T0100Z/
MCLEOD MN-NICOLLET MN-SIBLEY MN-
758 PM CDT SAT AUG 31 2013

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SIBLEY...NORTHWESTERN
NICOLLET AND SOUTHWESTERN MCLEOD COUNTIES HAS BEEN REISSUED...

PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER
INFORMATION.

LAT...LON 4434 9445 4436 9449 4439 9466 4448 9455
      4471 9454 4465 9425 4444 9427 4428 9441
TIME...MOT...LOC 0058Z 289DEG 31KT 4459 9422 4443 9423
          4429 9434

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 7:33 PM CDTSevere Thunderstorm WarningMPXBrown, Watonwan42 min
Aug 31, 7:52 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet, Sibley38 min
Aug 31, 8:30 PM CDTSpecial Weather StatementMPXLe Sueur, Rice45 min
Aug 31, 11:57 PM CDTSpecial Weather StatementMPXBlue Earth63 min
Sep 1, 12:06 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet39 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2013Every severe thunderstorm warning in 2013

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.