Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 211, NWS Twin Cities, MN

August 1, 2011Kandiyohi County, Meeker County, Stearns County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 1, 2011, 11:09 AM CDT for Kandiyohi County, Meeker County, Stearns County, Minnesota. It was in force for 66 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
Aug 1, 2011, 11:09 AM CDT (16:09 UTC)
Expired
Aug 1, 2011, 12:15 PM CDT
In force
66 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Kandiyohi County, MN, Meeker County, MN, Stearns County, MN

The radar

The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 16:11 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 1, 11:55 AM CDTTSTM WND GST 40Litchfield, MNWIND 40-50ESTIMATED. VERY HEAVY RAIN WITH STREET FLOODING
Aug 1, 11:56 AM CDTTSTM WND DMGLitchfield, MN6-8 IN BRANCHES DOWN IN EASTERN LITCHFIELD
Aug 1, 11:59 AM CDTHAIL 0.25Litchfield, 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
Aug 1, 4:57 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 4.2 hours before the alert went out and 88 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 2011-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2974 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 12:00Z on 2011-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
2974 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
898 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

705 
WUUS53 KMPX 011609
SVRMPX
MNC067-093-145-011715-
/O.NEW.KMPX.SV.W.0211.110801T1609Z-110801T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1109 AM CDT MON AUG 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  MEEKER COUNTY IN CENTRAL MINNESOTA...
  EXTREME SOUTH CENTRAL STEARNS COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1215 PM CDT

* AT 1106 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 NEW LONDON...OR ABOUT 13 MILES
  NORTHEAST OF WILLMAR...AND MOVING EAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  LITCHFIELD...
  NEW LONDON...
  SPICER...
  KANDIYOHI...
  HAWICK...
  ATWATER...
  GROVE CITY...
  MANANNAH...
  EDEN VALLEY...
  WATKINS...
  DARWIN...
  KIMBALL...
  DASSEL...

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.

&&

LAT...LON 4531 9427 4498 9427 4513 9508 4535 9504
TIME...MOT...LOC 1609Z 279DEG 28KT 4529 9489
WIND...HAIL 60MPH 1.00IN

$$
1 follow-up statement
667 
WWUS53 KMPX 011634
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1134 AM CDT MON AUG 1 2011

MNC067-093-145-011715-
/O.CON.KMPX.SV.W.0211.000000T0000Z-110801T1715Z/
KANDIYOHI MN-MEEKER MN-STEARNS MN-
1134 AM CDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME SOUTH
CENTRAL STEARNS...MEEKER AND EAST CENTRAL KANDIYOHI COUNTIES UNTIL
1215 PM CDT...

AT 1129 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM EDEN VALLEY TO 5 MILES SOUTHEAST OF
ATWATER...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  LITCHFIELD...KIMBALL...DARWIN...DASSEL AND KINGSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. 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 4534 9483 4531 9427 4498 9427 4511 9497
TIME...MOT...LOC 1634Z 286DEG 48KT 4530 9439 4505 9464
WIND...HAIL 70MPH 1.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 6:25 AM CDTAreal Flood AdvisoryMPXDouglas, Pope, Stevens6 hr
Aug 1, 6:45 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stevens, Todd45 min
Aug 1, 7:13 AM CDTTornado WarningMPXDouglas, Pope47 min
Aug 1, 7:27 AM CDTSevere Thunderstorm WarningMPXDouglas, Kandiyohi, Morrison, Pope, Stearns, Todd63 min
Aug 1, 8:13 AM CDTAreal Flood AdvisoryMPXKandiyohi, Meeker, Pope, Stearns3 hr
Aug 1, 9:00 AM CDTSpecial Weather StatementMPXBenton, Sherburne, Stearns, Wright60 min
Aug 1, 9:39 AM CDTFlash Flood WarningMPXDouglas, Pope3 hr
Aug 1, 9:44 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker46 min
Aug 1, 10:53 AM CDTSevere Thunderstorm WarningMPXBenton, Kandiyohi, Stearns67 min
Aug 1, 11:53 AM CDTSevere Thunderstorm WarningMPXSherburne, Stearns, Wright67 min
Aug 1, 12:03 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Meeker, Renville, Sibley57 min
Aug 1, 12:45 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin45 min
Aug 1, 1:01 PM CDTAreal Flood AdvisoryMPXCarver, Dakota, Hennepin, Ramsey, Scott3 hr
Aug 1, 1:18 PM CDTSevere Thunderstorm WarningMPXDakota, Le Sueur, Rice, Scott, Sibley57 min
Aug 1, 1:25 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Ramsey, Washington65 min
Aug 1, 2:02 PM CDTSevere Thunderstorm WarningMPXGoodhue, Le Sueur, Rice, Steele, Waseca58 min
Aug 1, 3:04 PM CDTSevere Thunderstorm WarningMPXGoodhue37 min
Aug 1, 3:54 PM CDTSpecial Weather StatementMPXAnoka, Chisago, Isanti, Mille Lacs51 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.