Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 147, NWS Twin Cities, MN

July 15, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 15, 2011, 7:33 AM CDT for 4 counties in Minnesota. It was in force for 57 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
Jul 15, 2011, 7:33 AM CDT (12:33 UTC)
Expired
Jul 15, 2011, 8:30 AM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Douglas County, MN, Pope County, MN, Stearns County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 12:35 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 15, 7:56 AM CDTHAIL 0.25Villard, 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 15, 6:40 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 0.6 hours before the alert went out and 140 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 2011-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1183 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 2011-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
1183 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

744 
WUUS53 KMPX 151233
SVRMPX
MNC041-121-145-153-151330-
/O.NEW.KMPX.SV.W.0147.110715T1233Z-110715T1330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
733 AM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHEASTERN POPE COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHWESTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN TODD COUNTY IN CENTRAL MINNESOTA...

* UNTIL 830 AM CDT

* AT 730 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
  MPH. THIS STORM WAS LOCATED 5 MILES SOUTHWEST OF OSAKIS...OR ABOUT
  7 MILES SOUTHEAST OF ALEXANDRIA...AND MOVING EAST AT 40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  FORADA...
  OSAKIS...
  LITTLE SAUK...
  SAUK CENTRE...
  ELROSA...
  MEIRE GROVE...
  GREY EAGLE...
  MELROSE...
  NORTH SHORE...
  PLEASANT BEACH...
  ST ROSA...
  NEW MUNICH...
  FREEPORT...

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 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4576 9540 4596 9514
TIME...MOT...LOC 1233Z 291DEG 33KT 4582 9522
WIND...HAIL 60MPH 1.25IN

$$
3 follow-up statements
344 
WWUS53 KMPX 151255
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
755 AM CDT FRI JUL 15 2011

MNC041-151310-
/O.CAN.KMPX.SV.W.0147.000000T0000Z-110715T1330Z/
DOUGLAS MN-
755 AM CDT FRI JUL 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DOUGLAS COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4575 9539 4577 9513
      4595 9515 4596 9514
TIME...MOT...LOC 1255Z 297DEG 27KT 4587 9487 4563 9516

$$

MNC121-145-153-151330-
/O.CON.KMPX.SV.W.0147.000000T0000Z-110715T1330Z/
POPE MN-STEARNS MN-TODD MN-
755 AM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
TODD...NORTHWESTERN STEARNS AND NORTHEASTERN POPE COUNTIES UNTIL 830
AM CDT...

AT 753 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM LITTLE SAUK TO SEDAN...MOVING SOUTHEAST AT 30
MPH.

LOCATIONS IMPACTED INCLUDE...
  SAUK CENTRE...GREY EAGLE...NORTH SHORE...PLEASANT BEACH...
  MELROSE...ELROSA...MEIRE GROVE...ST ROSA...NEW MUNICH...FREEPORT...
  BROOTEN...PADUA...BURTRUM...GREENWALD AND SPRING HILL.

LAT...LON 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4575 9539 4577 9513
      4595 9515 4596 9514
TIME...MOT...LOC 1255Z 297DEG 27KT 4587 9487 4563 9516
WIND...HAIL 60MPH 1.00IN

$$
613 
WWUS53 KMPX 151305
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
805 AM CDT FRI JUL 15 2011

MNC121-145-153-151330-
/O.CON.KMPX.SV.W.0147.000000T0000Z-110715T1330Z/
POPE MN-STEARNS MN-TODD MN-
805 AM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
TODD...NORTHWESTERN STEARNS AND NORTHEASTERN POPE COUNTIES UNTIL 830
AM CDT...

AT 802 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM GREY
EAGLE TO SAUK CENTRE TO SEDAN...MOVING SOUTHEAST AT 30 MPH. NICKEL
SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  GREY EAGLE...NORTH SHORE...MELROSE...PLEASANT BEACH...MEIRE
  GROVE...ST ROSA...NEW MUNICH...ELROSA...FREEPORT...BURTRUM...
  BROOTEN...PADUA...GREENWALD AND SPRING HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4573 9537 4577 9517
      4576 9514 4594 9503
TIME...MOT...LOC 1305Z 297DEG 27KT 4588 9475 4568 9487
          4559 9517
WIND...HAIL 60MPH 0.88IN

$$
627 
WWUS53 KMPX 151321
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
821 AM CDT FRI JUL 15 2011

MNC121-151336-
/O.CAN.KMPX.SV.W.0147.000000T0000Z-110715T1330Z/
POPE MN-
821 AM CDT FRI JUL 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL POPE COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF
THE WARNED AREA.

LAT...LON 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4567 9514 4589 9494
      4592 9490
TIME...MOT...LOC 1321Z 297DEG 27KT 4582 9460 4562 9472
          4554 9502

$$

MNC145-153-151330-
/O.CON.KMPX.SV.W.0147.000000T0000Z-110715T1330Z/
STEARNS MN-TODD MN-
821 AM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
TODD AND NORTHWESTERN STEARNS COUNTIES UNTIL 830 AM CDT...

AT 816 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM UPSALA
TO NEW MUNICH TO 6 MILES WEST OF ELROSA...MOVING SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  SPRING HILL.

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 4589 9465 4578 9465 4578 9454 4575 9451
      4550 9485 4549 9513 4567 9514 4589 9494
      4592 9490
TIME...MOT...LOC 1321Z 297DEG 27KT 4582 9460 4562 9472
          4554 9502
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 3:40 AM CDTExcessive Heat WatchMPXAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more36 hr
Jul 15, 4:58 AM CDTSevere Thunderstorm WarningMPXDouglas62 min
Jul 15, 5:55 AM CDTAreal Flood AdvisoryMPXDouglas, Todd3 hr
Jul 15, 6:13 AM CDTSpecial Weather StatementMPXTodd62 min
Jul 15, 6:19 AM CDTSevere Thunderstorm WarningMPXDouglas, Stearns, Todd56 min
Jul 15, 6:44 AM CDTSevere Thunderstorm WarningMPXStearns, Todd61 min
Jul 15, 6:50 AM CDTSevere Thunderstorm WarningMPXDouglas55 min
Jul 15, 7:05 AM CDTSevere Thunderstorm WarningMPXStearns55 min
Jul 15, 7:11 AM CDTSpecial Weather StatementMPXMorrison79 min
Jul 15, 8:14 AM CDTFlash Flood WarningMPXDouglas, Todd3 hr
Jul 15, 8:37 AM CDTSpecial Weather StatementMPXStearns53 min
Jul 15, 8:51 AM CDTFlash Flood WarningMPXPope, Stearns3 hr
Jul 15, 9:00 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright45 min
Jul 15, 9:36 AM CDTRiver Flood WarningMPXTodd5 days
Jul 15, 10:12 AM CDTSpecial Weather StatementMPXAnoka, Hennepin, Sherburne, Wright63 min
Jul 15, 11:07 AM CDTSpecial Weather StatementMPXFreeborn, Steele38 min
Jul 15, 12:41 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice52 min
Jul 15, 12:52 PM CDTFlood WatchMPXAnoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 22 more13 hr
Jul 15, 2:45 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca44 min
Jul 15, 3:09 PM CDTAreal Flood AdvisoryMPXBlue Earth, Carver, Le Sueur, Nicollet, Rice, Scott and 2 more3 hr
Jul 15, 3:20 PM CDTSpecial Weather StatementMPXFreeborn, Le Sueur, Rice, Steele, Waseca55 min
Jul 15, 3:34 PM CDTSevere Thunderstorm WarningMPXFreeborn, Rice, Steele, Waseca26 min
Jul 15, 3:35 PM CDTFlash Flood WarningMPXDakota, Le Sueur, Rice, Scott, Steele, Waseca3 hr
Jul 15, 3:46 PM CDTExcessive Heat WarningMPXAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more5 days
Jul 15, 3:50 PM CDTFlash Flood WarningMPXDakota, Goodhue, Rice3 hr
Jul 15, 4:55 PM CDTAreal Flood AdvisoryMPXFaribault, Freeborn, Steele, Waseca3 hr

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.