Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 217, NWS Twin Cities, MN

August 1, 20115 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 1, 2011, 2:02 PM CDT for 5 counties in Minnesota. It was in force for 58 min. 5 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, 2:02 PM CDT (19:02 UTC)
Expired: Aug 1, 2011, 3:00 PM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Goodhue County, MN, Le Sueur County, MN, Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 67 km from the middle of the area, began a volume at 19:02 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

Time	Report	Where	Remark
Aug 1, 2:14 PM CDT	HAIL 0.5	2 N Faribault, MN	DIME SIZED HAIL
Aug 1, 2:14 PM CDT	HAIL 0.75	2 N Faribault, MN
Aug 1, 2:15 PM CDT	TSTM WND GST 35	Faribault, MN	AT ROBERTS LAKE
Aug 1, 2:19 PM CDT	FUNNEL CLOUD	1 S Faribault, MN	AT 230TH AND ALBERS AVE.
Aug 1, 2:20 PM CDT	TSTM WND DMG	2 N Nerstrand, MN	LARGE BRANCHES DOWN

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.

Issued	Product	Office	Lasted
Aug 1, 11:52 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.0 hours before the alert went out and 68 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: 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.

364 
WUUS53 KMPX 011902
SVRMPX
MNC049-079-131-147-161-012000-
/O.NEW.KMPX.SV.W.0217.110801T1902Z-110801T2000Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHEASTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHERN STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHEASTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 300 PM CDT

* AT 157 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
  LOCATED 7 MILES EAST OF KILKENNY...OR ABOUT 9 MILES WEST OF
  FARIBAULT...AND MOVING EAST AT 30 MPH.  NICKEL SIZE HAIL MAY ALSO
  ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  FARIBAULT...
  KILKENNY...
  WATERVILLE...
  MORRISTOWN...
  WARSAW...
  DEERFIELD...
  DUNDAS...
  NORTHFIELD...
  MEDFORD...
  RUSKIN...
  NERSTRAND...
  DENNISON...
  KENYON...
  BOMBAY...

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.

&&

LAT...LON 4421 9359 4440 9361 4439 9329 4447 9325
      4447 9323 4437 9277 4419 9288 4419 9304
      4407 9304
TIME...MOT...LOC 1902Z 289DEG 25KT 4433 9340
WIND...HAIL 60MPH 0.88IN

$$

1 follow-up statement

013 
WWUS53 KMPX 011933
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
233 PM CDT MON AUG 1 2011

MNC079-147-011948-
/O.CAN.KMPX.SV.W.0217.000000T0000Z-110801T2000Z/
LE SUEUR MN-STEELE MN-
233 PM CDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN STEELE AND
SOUTHEASTERN LE SUEUR COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE WARNED AREA.

LAT...LON 4420 9336 4422 9343 4439 9344 4439 9329
      4447 9325 4437 9277 4419 9288
TIME...MOT...LOC 1933Z 279DEG 28KT 4440 9299

$$

MNC049-131-012000-
/O.CON.KMPX.SV.W.0217.000000T0000Z-110801T2000Z/
GOODHUE MN-RICE MN-
233 PM CDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RICE AND
SOUTHWESTERN GOODHUE COUNTIES UNTIL 300 PM CDT...

AT 229 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR DENNISON...OR 14 MILES NORTHEAST OF
FARIBAULT...MOVING EAST AT 30 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY
THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  KENYON...BOMBAY AND HADER.

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 4420 9336 4422 9343 4439 9344 4439 9329
      4447 9325 4437 9277 4419 9288
TIME...MOT...LOC 1933Z 279DEG 28KT 4440 9299
WIND...HAIL 60MPH 0.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 6:25 AM CDT	Areal Flood Advisory	MPX	Douglas, Pope, Stevens	6 hr
Aug 1, 6:45 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens, Todd	45 min
Aug 1, 7:13 AM CDT	Tornado Warning	MPX	Douglas, Pope	47 min
Aug 1, 7:27 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Kandiyohi, Morrison, Pope, Stearns, Todd	63 min
Aug 1, 8:13 AM CDT	Areal Flood Advisory	MPX	Kandiyohi, Meeker, Pope, Stearns	3 hr
Aug 1, 9:00 AM CDT	Special Weather Statement	MPX	Benton, Sherburne, Stearns, Wright	60 min
Aug 1, 9:39 AM CDT	Flash Flood Warning	MPX	Douglas, Pope	3 hr
Aug 1, 9:44 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	46 min
Aug 1, 10:53 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Kandiyohi, Stearns	67 min
Aug 1, 11:09 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	66 min
Aug 1, 11:53 AM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	67 min
Aug 1, 12:03 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Meeker, Renville, Sibley	57 min
Aug 1, 12:45 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	45 min
Aug 1, 1:01 PM CDT	Areal Flood Advisory	MPX	Carver, Dakota, Hennepin, Ramsey, Scott	3 hr
Aug 1, 1:18 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Le Sueur, Rice, Scott, Sibley	57 min
Aug 1, 1:25 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Washington	65 min
Aug 1, 3:04 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	37 min
Aug 1, 3:54 PM CDT	Special Weather Statement	MPX	Anoka, Chisago, Isanti, Mille Lacs	51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.