Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 154, NWS Twin Cities, MN

July 17, 20115 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2011, 10:26 PM CDT for 5 counties in Minnesota. It was in force for 64 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: Jul 17, 2011, 10:26 PM CDT (03:26 UTC)
Expired: Jul 17, 2011, 11:30 PM CDT
In force: 64 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Kandiyohi County, MN, Pope County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 179 km from the middle of the area, began a volume at 03:26 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.

Issued	Product	Office	Lasted
Jul 17, 4:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.4 hours before the alert went out and 176 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4443 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

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

400 
WUUS53 KMPX 180326
SVRMPX
MNC067-121-145-149-151-180430-
/O.NEW.KMPX.SV.W.0154.110718T0326Z-110718T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1026 PM CDT SUN JUL 17 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN POPE COUNTY IN WEST CENTRAL MINNESOTA...
  WEST CENTRAL STEARNS COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN STEVENS COUNTY IN WEST CENTRAL MINNESOTA...
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 1130 PM CDT

* AT 1022 PM CDT...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 7 MILES SOUTHEAST
  OF FORADA TO 11 MILES SOUTH OF STARBUCK TO 6 MILES EAST OF
  ARTICHOKE...AND MOVING SOUTHEAST AT 25 MPH.  NICKEL SIZE HAIL MAY
  ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  GLENWOOD...
  BENSON...
  LONG BEACH...
  SEDAN...
  CLONTARF...
  HOLLOWAY...
  DANVERS...
  SUNBURG...
  ELROSA...
  MEIRE GROVE...
  BELGRADE...
  GEORGEVILLE...
  DE GRAFF...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND 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 4549 9561 4575 9539 4566 9481 4531 9498
      4515 9583 4533 9613 4540 9613 4541 9619
      4542 9618
TIME...MOT...LOC 0326Z 293DEG 22KT 4573 9520 4545 9543
          4537 9600
WIND...HAIL 60MPH 0.88IN

$$

CLF

1 follow-up statement

441 
WWUS53 KMPX 180414
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1114 PM CDT SUN JUL 17 2011

MNC149-180429-
/O.CAN.KMPX.SV.W.0154.000000T0000Z-110718T0430Z/
STEVENS MN-
1114 PM CDT SUN JUL 17 2011

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

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

LAT...LON 4524 9598 4547 9559 4556 9518 4561 9485
      4531 9498 4515 9583
TIME...MOT...LOC 0414Z 293DEG 22KT 4561 9481 4533 9505
          4526 9561

$$

MNC067-121-145-151-180430-
/O.CON.KMPX.SV.W.0154.000000T0000Z-110718T0430Z/
KANDIYOHI MN-POPE MN-STEARNS MN-SWIFT MN-
1114 PM CDT SUN JUL 17 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SWIFT...WEST
CENTRAL STEARNS...SOUTHEASTERN POPE AND NORTHWESTERN KANDIYOHI
COUNTIES UNTIL 1130 PM CDT...

AT 1112 PM 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 MEIRE
GROVE TO 6 MILES NORTHWEST OF NEW LONDON TO BENSON...MOVING SOUTHEAST
AT 25 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  GEORGEVILLE AND DE GRAFF.

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 4524 9598 4547 9559 4556 9518 4561 9485
      4531 9498 4515 9583
TIME...MOT...LOC 0414Z 293DEG 22KT 4561 9481 4533 9505
          4526 9561
WIND...HAIL 60MPH 0.88IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 9:08 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens	67 min
Jul 17, 9:49 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens	56 min
Jul 17, 10:31 PM CDT	Areal Flood Advisory	MPX	Kandiyohi, Pope, Stearns, Stevens, Swift	3 hr
Jul 17, 10:34 PM CDT	Areal Flood Advisory	MPX	Kandiyohi, Pope, Stearns, Stevens, Swift	3 hr
Jul 17, 11:09 PM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Meeker, Stearns	66 min
Jul 17, 11:23 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Renville, Swift	52 min
Jul 17, 11:54 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Sibley	51 min
Jul 18, 12:39 AM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet, Scott, Sibley	66 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every 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.