Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 135, NWS Twin Cities, MN

September 20, 2014Steele County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2014, 5:43 PM CDT for Steele County, Waseca County, Minnesota. It was in force for 32 min. 2 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: Sep 20, 2014, 5:43 PM CDT (22:43 UTC)
Expired: Sep 20, 2014, 6:15 PM CDT
In force: 32 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 106 km from the middle of the area, began a volume at 22:46 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 20, 5:45 PM CDT	HAIL 1	Waseca, MN
Sep 20, 6:22 PM CDT	HAIL 0.88	Blooming Prairie, 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 20, 1:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.7 hours before the alert went out and 107 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: 295 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1113 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

758 
WUUS53 KMPX 202243
SVRMPX
MNC147-161-202315-
/O.NEW.KMPX.SV.W.0135.140920T2243Z-140920T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
543 PM CDT SAT SEP 20 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 615 PM CDT

* AT 541 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WASECA...AND
  MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL.

  SOURCE...TRAINED WEATHER SPOTTERS.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
           ROOFS...SIDING AND TREES.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OWATONNA AROUND 555 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE HOPE...STEELE CENTER...BIXBY
AND BLOOMING PRAIRIE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4385 9306 4385 9316 4401 9365 4418 9355
      4404 9303 4385 9303 4384 9305
TIME...MOT...LOC 2243Z 292DEG 41KT 4406 9347

HAIL...1.25IN
WIND...60MPH

$$

2 follow-up statements

516 
WWUS53 KMPX 202254
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
554 PM CDT SAT SEP 20 2014

MNC161-202304-
/O.CAN.KMPX.SV.W.0135.000000T0000Z-140920T2315Z/
WASECA MN-
554 PM CDT SAT SEP 20 2014

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

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

LAT...LON 4385 9306 4385 9316 4393 9341 4414 9340
      4404 9303 4385 9303 4384 9305
TIME...MOT...LOC 2254Z 292DEG 41KT 4401 9331

$$

MNC147-202315-
/O.CON.KMPX.SV.W.0135.000000T0000Z-140920T2315Z/
STEELE MN-
554 PM CDT SAT SEP 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR STEELE COUNTY
UNTIL 615 PM CDT...

AT 551 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES SOUTHWEST
OF OWATONNA...AND MOVING EAST AT 45 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF STEELE
COUNTY...INCLUDING THE FOLLOWING LOCATIONS...STEELE CENTER...BIXBY
AND BLOOMING PRAIRIE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4385 9306 4385 9316 4393 9341 4414 9340
      4404 9303 4385 9303 4384 9305
TIME...MOT...LOC 2254Z 292DEG 41KT 4401 9331

HAIL...1.50IN
WIND...60MPH

$$

286 
WWUS53 KMPX 202305
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
605 PM CDT SAT SEP 20 2014

MNC147-202315-
/O.CON.KMPX.SV.W.0135.000000T0000Z-140920T2315Z/
STEELE MN-
605 PM CDT SAT SEP 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
STEELE COUNTY UNTIL 615 PM CDT...

AT 604 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 9 MILES SOUTH OF
OWATONNA...AND MOVING EAST AT 45 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
SOUTHEASTERN STEELE COUNTY...INCLUDING THE FOLLOWING LOCATIONS...
BIXBY AND BLOOMING PRAIRIE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4385 9303 4384 9305 4385 9306 4385 9316
      4389 9330 4410 9324 4404 9303
TIME...MOT...LOC 2305Z 292DEG 41KT 4396 9315

HAIL...1.50IN
WIND...60MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 10:58 PM CDT	Special Weather Statement	MPX	Faribault, Freeborn	47 min
Sep 20, 2:14 PM CDT	Special Weather Statement	MPX	Douglas, Stevens	61 min
Sep 20, 2:57 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Kandiyohi, Pope, Stearns, Stevens, Swift	48 min
Sep 20, 3:19 PM CDT	Special Weather Statement	MPX	Morrison, Todd	56 min
Sep 20, 3:36 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Meeker, Renville, Stearns	39 min
Sep 20, 4:11 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Wright	49 min
Sep 20, 4:56 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Scott, Sibley, Wright	49 min
Sep 20, 4:57 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley	48 min
Sep 20, 5:06 PM CDT	Special Weather Statement	MPX	Anoka, Chisago, Isanti, Kanabec, Mille Lacs, Sherburne and 1 more	54 min
Sep 20, 5:08 PM CDT	Special Weather Statement	MPX	Waseca	37 min
Sep 20, 5:33 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Le Sueur, Rice, Scott	42 min
Sep 20, 5:41 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Freeborn, Le Sueur, Nicollet, Waseca and 1 more	49 min
Sep 20, 6:02 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	43 min
Sep 20, 6:13 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014 Every severe thunderstorm warning in 2014

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.