Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 209, NWS Twin Cities, MN

August 1, 2011Kandiyohi County, Meeker County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 1, 2011, 9:44 AM CDT for Kandiyohi County, Meeker County, Minnesota. It was in force for 46 min. 1 report 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, 9:44 AM CDT (14:44 UTC)
Expired
Aug 1, 2011, 10:30 AM CDT
In force
46 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

The radar

The Minneapolis radar (KMPX), 97 km from the middle of the area, began a volume at 14:44 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, 9:50 AM CDTHAIL 1.5N Spicer, 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, 2.7 hours before the alert went out and 95 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2011-08-01The 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.

764 
WUUS53 KMPX 011444
SVRMPX
MNC067-093-011530-
/O.NEW.KMPX.SV.W.0209.110801T1444Z-110801T1530Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  NORTHERN MEEKER COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1030 AM CDT

* AT 939 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 SPICER...OR ABOUT 11 MILES NORTHEAST OF
  WILLMAR...AND MOVING EAST AT 30 MPH.

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

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

&&

LAT...LON 4534 9476 4533 9476 4533 9459 4531 9438
      4529 9438 4528 9432 4506 9439 4518 9504
      4536 9499
TIME...MOT...LOC 1445Z 279DEG 28KT 4526 9487
WIND...HAIL 60MPH 1.00IN

$$
2 follow-up statements
866 
WWUS53 KMPX 011501
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1001 AM CDT MON AUG 1 2011

MNC067-093-011530-
/O.CON.KMPX.SV.W.0209.000000T0000Z-110801T1530Z/
KANDIYOHI MN-MEEKER MN-
1001 AM CDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MEEKER AND EAST CENTRAL KANDIYOHI COUNTIES UNTIL 1030 AM CDT...

AT 958 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES EAST OF
SPICER...OR 12 MILES NORTHEAST OF WILLMAR...MOVING SOUTHEAST AT 25
MPH.

IN ADDITION...AT 950 AM...NEAR GOLF BALL SIZE HAIL WAS REPORTED NEAR 
SPICER. 

LOCATIONS IMPACTED INCLUDE...
  LITCHFIELD...ATWATER...MANANNAH...GROVE CITY...EDEN VALLEY AND
  DARWIN.

LAT...LON 4534 9476 4533 9476 4533 9459 4531 9439
      4529 9438 4528 9432 4506 9439 4517 9497
      4535 9489
TIME...MOT...LOC 1501Z 293DEG 20KT 4521 9482
WIND...HAIL 60MPH 1.00IN

$$
698 
WWUS53 KMPX 011527
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1027 AM CDT MON AUG 1 2011

MNC067-093-011541-
/O.EXP.KMPX.SV.W.0209.000000T0000Z-110801T1530Z/
KANDIYOHI MN-MEEKER MN-
1027 AM CDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MEEKER AND EAST
CENTRAL KANDIYOHI COUNTIES WILL EXPIRE AT 1030 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS IN WESTERN MEEKER COUNTY...AND NO LONGER POSES AN IMMEDIATE 
THREAT TO LIFE OR PROPERTY...HOWEVER GUSTY WINDS AND HEAVY RAIN ARE 
STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4534 9476 4533 9476 4533 9459 4531 9439
      4529 9438 4528 9432 4506 9439 4517 9497
      4535 9489
TIME...MOT...LOC 1526Z 293DEG 20KT 4516 9464

$$

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, 10:53 AM CDTSevere Thunderstorm WarningMPXBenton, Kandiyohi, Stearns67 min
Aug 1, 11:09 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Stearns66 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.