Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 58, NWS Twin Cities, MN

May 30, 2011Brown County, Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 30, 2011, 2:55 AM CDT for Brown County, Redwood County, Minnesota. It was in force for 50 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
May 30, 2011, 2:55 AM CDT (07:55 UTC)
Expired
May 30, 2011, 3:45 AM CDT
In force
50 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Brown County, MN, Redwood County, MN

The radar

The Minneapolis radar (KMPX), 124 km from the middle of the area, began a volume at 07:57 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
May 29, 10:58 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.9 hours before the alert went out and 122 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 2011-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2019 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
532 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

635 
WUUS53 KMPX 300755
SVRMPX
MNC015-127-300845-
/O.NEW.KMPX.SV.W.0058.110530T0755Z-110530T0845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
255 AM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN REDWOOD COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 345 AM CDT

* AT 253 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED NEAR JEFFERS...OR ABOUT 14 MILES NORTH OF
  WINDOM...AND MOVING NORTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  SANBORN...
  COMFREY...
  SPRINGFIELD...
  MORGAN...
  EVAN...
  SLEEPY EYE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4410 9510 4411 9511 4419 9511 4419 9519
      4449 9487 4444 9474 4440 9469 4439 9462
      4430 9445 4410 9484
TIME...MOT...LOC 0756Z 225DEG 43KT 4409 9512
WIND...HAIL 60MPH 1.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 3:17 AM CDTSpecial Weather StatementMPXDouglas, Pope43 min
May 30, 3:23 AM CDTSpecial Weather StatementMPXMcLeod52 min
May 30, 3:42 AM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Meeker, Wright51 min
May 30, 4:20 AM CDTSpecial Weather StatementMPXAnoka, Hennepin, Ramsey40 min
May 30, 4:23 AM CDTSpecial Weather StatementMPXYellow Medicine52 min
May 30, 4:51 AM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville, Sibley, Wright54 min
May 30, 4:56 AM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine64 min
May 30, 5:19 AM CDTSpecial Weather StatementMPXHennepin41 min
May 30, 5:40 AM CDTSpecial Weather StatementMPXWright50 min
May 30, 6:03 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker42 min
May 30, 6:50 AM CDTSpecial Weather StatementMPXWright40 min
May 30, 7:31 AM CDTSpecial Weather StatementMPXAnoka, Isanti44 min
May 30, 10:07 AM CDTSpecial Weather StatementMPXAnoka, Carver, Chisago, Hennepin, Ramsey, Scott38 min
May 30, 10:25 AM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Chisago, Dakota, Hennepin, Ramsey and 2 more50 min
May 30, 10:40 AM CDTRiver Flood WarningMPXRedwood11 hr
May 30, 10:40 AM CDTRiver Flood WarningMPXChippewa, Lac qui Parle, Yellow Medicine14 days
May 30, 10:40 AM CDTRiver Flood WarningMPXCarver4 days
May 30, 12:47 PM CDTSevere Thunderstorm WarningMPXGoodhue27 min
May 30, 12:56 PM CDTSevere Thunderstorm WarningMPXWashington34 min
May 30, 1:25 PM CDTSevere Thunderstorm WarningMPXGoodhue, Rice, Steele35 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.