Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 98, NWS Twin Cities, MN

July 1, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 1, 2011, 5:38 PM CDT for 4 counties in Minnesota. It was in force for 67 min. 3 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
Jul 1, 2011, 5:38 PM CDT (22:38 UTC)
Expired
Jul 1, 2011, 6:45 PM CDT
In force
67 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

Counties Benton County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 133 km from the middle of the area, began a volume at 22:41 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
Jul 1, 6:17 PM CDTHAIL 114 N Milaca, MN
Jul 1, 6:30 PM CDTTSTM WND DMG7 N Ogilvie, MNTREE DOWN 20 INCHES IN DIAMETER
Jul 1, 6:32 PM CDTHAIL 112 N Mora, MN

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
Jul 1, 2:08 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.6 hours before the alert went out and 132 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 12:00Z on 2011-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3970 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 12:00Z on 2011-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
3970 J/kg
Mixed-layer CIN
-245 J/kg
Mixed-layer LCL
1089 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

976 
WUUS53 KMPX 012238
SVRMPX
MNC009-065-095-097-012345-
/O.NEW.KMPX.SV.W.0098.110701T2238Z-110701T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
538 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...
  CENTRAL KANABEC COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN MORRISON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 645 PM CDT

* AT 536 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MORRILL...OR
  ABOUT 16 MILES WEST OF MILACA...AND MOVING NORTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MORRILL...
  BUCKMAN...
  GENOLA...
  PIERZ...
  LASTRUP...
  HILLMAN...
  ONAMIA...
  VINELAND...
  BAYVIEW...
  WAHKON...
  WARMAN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER LINES. 

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4602 9319 4569 9387 4594 9423 4617 9392
      4617 9382 4625 9380
TIME...MOT...LOC 2238Z 231DEG 31KT 4584 9394
WIND...HAIL 60MPH 1.75IN

$$

JLT
1 follow-up statement
727 
WWUS53 KMPX 012306
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
606 PM CDT FRI JUL 1 2011

MNC009-065-095-097-012345-
/O.CON.KMPX.SV.W.0098.000000T0000Z-110701T2345Z/
BENTON MN-KANABEC MN-MILLE LACS MN-MORRISON MN-
606 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MORRISON...NORTHERN MILLE LACS...CENTRAL KANABEC AND NORTHEASTERN
BENTON COUNTIES UNTIL 645 PM CDT...

AT 604 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTH OF
ONAMIA...OR 15 MILES NORTH OF MILACA...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  ONAMIA...VINELAND...BAYVIEW...WAHKON AND WARMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH CAN UPROOT TREES AND DOWN POWER LINES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4602 9319 4569 9387 4594 9423 4617 9392
      4617 9382 4625 9380
TIME...MOT...LOC 2306Z 231DEG 31KT 4599 9367
WIND...HAIL 60MPH 1.75IN

$$

JLT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 4:05 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood, Renville, Yellow Medicine55 min
Jul 1, 4:31 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright59 min
Jul 1, 4:37 PM CDTTornado WarningMPXRedwood, Renville23 min
Jul 1, 4:53 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Redwood, Renville, Sibley67 min
Jul 1, 4:57 PM CDTTornado WarningMPXRedwood, Renville33 min
Jul 1, 4:59 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison, Stearns61 min
Jul 1, 5:13 PM CDTSevere Thunderstorm WarningMPXKandiyohi, McLeod, Meeker, Renville, Sibley, Stearns and 1 more62 min
Jul 1, 5:27 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti, Sherburne, Wright48 min
Jul 1, 5:52 PM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Hennepin, Isanti, Meeker, Mille Lacs and 3 more53 min
Jul 1, 6:02 PM CDTSpecial Weather StatementMPXCarver, Hennepin, Scott43 min
Jul 1, 6:16 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison, Stearns29 min
Jul 1, 6:20 PM CDTTornado WarningMPXBenton, Sherburne, Stearns25 min
Jul 1, 6:27 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Isanti, Kanabec, Mille Lacs63 min
Jul 1, 6:42 PM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Chisago, Hennepin, Isanti, Kanabec and 5 more63 min
Jul 1, 6:42 PM CDTSevere Thunderstorm WarningMPXMartin33 min
Jul 1, 6:56 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.