Alert archive / Minnesota / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 261, NWS Twin Cities, MN

September 15, 2010Steele County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 15, 2010, 5:49 PM CDT for Steele County, Waseca County, Minnesota. It was in force for 41 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: Sep 15, 2010, 5:49 PM CDT (22:49 UTC)
Expired: Sep 15, 2010, 6:30 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 103 km from the middle of the area, began a volume at 22:50 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
Sep 15, 6:00 PM CDT	HAIL 1.25	2 Ne Waldorf, 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.

Issued	Product	Office	Lasted
Sep 15, 2:19 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 103 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

550 
WUUS53 KMPX 152249
SVRMPX
MNC147-161-152330-
/O.NEW.KMPX.SV.W.0261.100915T2249Z-100915T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
549 PM CDT WED SEP 15 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 630 PM CDT

* AT 545 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 10 MILES WEST
  OF OTISCO...OR ABOUT 17 MILES SOUTHWEST OF WASECA...AND MOVING EAST
  AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  OTISCO...
  NEW RICHLAND...
  ELLENDALE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN MINNESOTA.

&&

LAT...LON 4385 9377 4402 9377 4410 9325 4386 9327
      4385 9345
TIME...MOT...LOC 2249Z 262DEG 22KT 4393 9372

$$

2 follow-up statements

362 
WWUS53 KMPX 152257
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
557 PM CDT WED SEP 15 2010

MNC147-161-152330-
/O.CON.KMPX.SV.W.0261.000000T0000Z-100915T2330Z/
WASECA MN-STEELE MN-
557 PM CDT WED SEP 15 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTHWESTERN STEELE AND SOUTHERN WASECA COUNTIES...

AT 554 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THE
SEVERE STORM WAS LOCATED NEAR WALDORF...OR ABOUT 6 MILES WEST OF
OTISCO...AND MOVING EAST AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
OTISCO...NEW RICHLAND AND ELLENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN MINNESOTA.

&&

LAT...LON 4385 9377 4402 9377 4410 9325 4386 9327
      4385 9345
TIME...MOT...LOC 2257Z 262DEG 22KT 4394 9365

$$

BAP

692 
WWUS53 KMPX 152320
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
620 PM CDT WED SEP 15 2010

MNC147-161-152330-
/O.CON.KMPX.SV.W.0261.000000T0000Z-100915T2330Z/
WASECA MN-STEELE MN-
620 PM CDT WED SEP 15 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTHWESTERN STEELE AND SOUTHERN WASECA COUNTIES...

AT 605 PM ONE AND ONE QUARTER INCH HAIL WAS REPORTED NEAR WALDORF
IN WASECA COUNTY. AT 615 PM SEVERE STORM WAS LOCATED 4 MILES EAST 
OF OTISCO...AND MOVING EAST AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
ELLENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN MINNESOTA.

&&

LAT...LON 4385 9377 4402 9377 4410 9325 4386 9327
      4385 9345
TIME...MOT...LOC 2318Z 262DEG 22KT 4396 9347

$$

BAP

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 2:35 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Swift	19 min
Sep 15, 4:24 AM CDT	Special Weather Statement	MPX	Faribault, Martin	81 min
Sep 15, 4:59 PM CDT	Special Weather Statement	MPX	Nicollet	46 min
Sep 15, 5:14 PM CDT	Special Weather Statement	MPX	Blue Earth	46 min
Sep 15, 5:21 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	39 min
Sep 15, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet	48 min
Sep 15, 5:43 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Rice, Waseca	32 min
Sep 15, 6:13 PM CDT	Tornado Warning	MPX	Le Sueur	32 min
Sep 15, 6:18 PM CDT	Areal Flood Warning	MPX	Lac qui Parle	3 hr
Sep 15, 6:52 PM CDT	Areal Flood Warning	MPX	Lac qui Parle, Yellow Medicine	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2010 Every severe thunderstorm warning in 2010

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.