Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 234, NWS Twin Cities, MN

August 6, 2011Meeker County, Stearns County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 6, 2011, 7:12 PM CDT for Meeker County, Stearns County, Wright County, Minnesota. It was in force for 33 min. 4 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 6, 2011, 7:12 PM CDT (00:12 UTC)
Expired
Aug 6, 2011, 7:45 PM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Meeker County, MN, Stearns County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 85 km from the middle of the area, began a volume at 00:13 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 6, 7:19 PM CDTHAIL 11 Wnw Richmond, MN1 INCH HAIL REPORTED NEAR HWY 23.
Aug 6, 7:20 PM CDTHAIL 1.55 S Cold Spring, MNGOLFBALL TO PING PONG SIZE HAIL REPORTED FOR APPROXIMATELY 10 MINUTES.
Aug 6, 7:22 PM CDTHAIL 0.881 E Roscoe, MN
Aug 6, 7:27 PM CDTHAIL 1.75Richmond, MN

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, 0.2 hours before the alert went out and 83 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 2011-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 931 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 2011-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
931 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1415 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

461 
WUUS53 KMPX 070012
SVRMPX
MNC093-145-171-070045-
/O.NEW.KMPX.SV.W.0234.110807T0012Z-110807T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
712 PM CDT SAT AUG 6 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MEEKER COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 708 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR
  RICHMOND...OR ABOUT 20 MILES WEST OF ST CLOUD...AND MOVING
  SOUTHEAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ROSCOE...
  RICHMOND...
  EDEN VALLEY...
  COLD SPRING...
  ST NICHOLAS...
  WATKINS...
  KIMBALL...
  FAIRHAVEN...
  SOUTH HAVEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4538 9406 4517 9428 4541 9471 4557 9458
TIME...MOT...LOC 0012Z 300DEG 24KT 4544 9453
WIND...HAIL <50MPH 1.00IN

$$
1 follow-up statement
708 
WWUS53 KMPX 070028
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
728 PM CDT SAT AUG 6 2011

MNC093-145-171-070045-
/O.CON.KMPX.SV.W.0234.000000T0000Z-110807T0045Z/
MEEKER MN-STEARNS MN-WRIGHT MN-
728 PM CDT SAT AUG 6 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WRIGHT...SOUTHEASTERN STEARNS AND NORTHEASTERN MEEKER COUNTIES UNTIL
745 PM CDT...

AT 722 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING QUARTER SIZE AND LARGER HAIL.  THIS STORM WAS 
LOCATED NEAR ST NICHOLAS...OR 17 MILES SOUTHWEST OF ST 
CLOUD...MOVING SOUTHEAST AT 30 MPH.

IN ADDITION...AT 720 PM CLOSE TO GOLF BALL SIZE HAIL WAS REPORTED 
NEAR RICHMOND WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  WATKINS...KIMBALL...FAIRHAVEN...SOUTH HAVEN AND KINGSTON.

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 4553 9446 4538 9406 4517 9428 4537 9463
TIME...MOT...LOC 0027Z 300DEG 24KT 4539 9441
WIND...HAIL <50MPH 1.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 7:16 PM CDTSpecial Weather StatementMPXMeeker44 min
Aug 6, 8:13 PM CDTSpecial Weather StatementMPXMcLeod47 min
Aug 6, 8:17 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Wright43 min
Aug 6, 8:46 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Sibley44 min
Aug 6, 9:45 PM CDTSevere Thunderstorm WarningMPXDakota, Le Sueur, Rice, Scott45 min
Aug 6, 10:32 PM CDTSpecial Weather StatementMPXSteele43 min
Aug 7, 7:27 AM CDTRiver Flood WarningMPXTodd5 days

Nearby

Severe Thunderstorm Warnings in Minnesota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.