Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 137, NWS Twin Cities, MN

September 20, 20144 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2014, 6:13 PM CDT for 4 counties in Minnesota. It was in force for 47 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 20, 2014, 6:13 PM CDT (23:13 UTC)
Expired: Sep 20, 2014, 7:00 PM CDT
In force: 47 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Faribault County, MN, Freeborn County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 120 km from the middle of the area, began a volume at 23:12 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, 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, 11.2 hours before the alert went out and 120 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.

821 
WUUS53 KMPX 202313
SVRMPX
MNC043-047-147-161-210000-
/O.NEW.KMPX.SV.W.0137.140920T2313Z-140921T0000Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA...
  FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 700 PM CDT

* AT 612 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 7 MILES NORTHWEST OF OWATONNA TO 10 MILES SOUTH OF
  WASECA TO 19 MILES NORTHWEST OF ALBERT LEA TO 10 MILES NORTHEAST OF
  BLUE EARTH...AND MOVING SOUTHEAST AT 60 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...TRAINED WEATHER SPOTTERS.

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

* SEVERE THUNDERSTORMS WILL BE NEAR...
  OWATONNA AROUND 620 PM CDT.
  RICE LAKE STATE PARK AROUND 625 PM CDT.
  HAYWARD AND ALBERT LEA AROUND 635 PM CDT.
  MYRE BIG ISLAND STATE PARK AROUND 640 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE BRUSH CREEK...BARODA...
HARTLAND...FREEBORN...ELLENDALE...MERTON...STEELE CENTER...
MANCHESTER...GENEVA AND CLARKS GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4350 9365 4353 9365 4374 9404 4384 9371
      4396 9354 4420 9342 4420 9304 4350 9305
TIME...MOT...LOC 2313Z 294DEG 53KT 4415 9331 4393 9345
          4380 9367 4372 9393

HAIL...1.00IN
WIND...60MPH

$$

4 follow-up statements

279 
WWUS53 KMPX 202327
SVSMPX

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

MNC161-202337-
/O.CAN.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
WASECA MN-
627 PM CDT SAT SEP 20 2014

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WASECA COUNTY IS
CANCELLED...

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

LAT...LON 4353 9365 4370 9397 4380 9362 4385 9350
      4385 9341 4390 9341 4395 9336 4420 9326
      4420 9304 4419 9304 4350 9305 4350 9365
TIME...MOT...LOC 2327Z 294DEG 53KT 4405 9305 4384 9319
          4371 9342 4363 9368

$$

MNC043-047-147-210000-
/O.CON.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
FARIBAULT MN-FREEBORN MN-STEELE MN-
627 PM CDT SAT SEP 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR STEELE...
FREEBORN AND EAST CENTRAL FARIBAULT COUNTIES UNTIL 700 PM CDT...

AT 625 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM RICE LAKE STATE PARK TO 14 MILES NORTH OF HAYWARD TO 6
MILES NORTHWEST OF ALBERT LEA TO 17 MILES WEST OF ALBERT LEA...AND
MOVING SOUTHEAST AT 60 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MYRE BIG ISLAND STATE PARK AND HAYWARD AROUND 635 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE MANSFIELD...EMMONS...TWIN
LAKES...MYRTLE...GLENVILLE AND LONDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4353 9365 4370 9397 4380 9362 4385 9350
      4385 9341 4390 9341 4395 9336 4420 9326
      4420 9304 4419 9304 4350 9305 4350 9365
TIME...MOT...LOC 2327Z 294DEG 53KT 4405 9305 4384 9319
          4371 9342 4363 9368

HAIL...0.75IN
WIND...60MPH

$$

622 
WWUS53 KMPX 202339
SVSMPX

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

MNC043-047-147-210000-
/O.CON.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
FARIBAULT MN-FREEBORN MN-STEELE MN-
639 PM CDT SAT SEP 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
STEELE...FREEBORN AND EAST CENTRAL FARIBAULT COUNTIES UNTIL 700 PM
CDT...

AT 636 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM DODGE CENTER TO 8 MILES NORTH OF AUSTIN TO HAYWARD TO
10 MILES SOUTHWEST OF ALBERT LEA...AND MOVING SOUTHEAST AT 60 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
FARIBAULT...EASTERN STEELE AND FREEBORN COUNTIES...INCLUDING THE
FOLLOWING LOCATIONS...MYRTLE...GLENVILLE AND LONDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4350 9306 4350 9365 4353 9365 4361 9381
      4379 9336 4386 9325 4397 9318 4420 9311
      4420 9304 4386 9304 4352 9305
TIME...MOT...LOC 2339Z 294DEG 53KT 4397 9283 4376 9297
          4363 9320 4355 9346

HAIL...<.75IN
WIND...60MPH

$$

024 
WWUS53 KMPX 202346
SVSMPX

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

MNC043-147-202356-
/O.CAN.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
FARIBAULT MN-STEELE MN-
646 PM CDT SAT SEP 20 2014

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN STEELE AND EAST
CENTRAL FARIBAULT COUNTIES IS CANCELLED...

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

LAT...LON 4350 9306 4350 9364 4358 9365 4371 9330
      4385 9313 4385 9305 4384 9304 4378 9304
      4360 9305
TIME...MOT...LOC 2346Z 294DEG 53KT 4391 9270 4371 9284
          4358 9308 4350 9334

$$

MNC047-210000-
/O.CON.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
FREEBORN MN-
646 PM CDT SAT SEP 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
FREEBORN COUNTY UNTIL 700 PM CDT...

AT 644 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHEAST OF HAYFIELD TO BROWNSDALE TO 8 MILES
SOUTHEAST OF HAYWARD TO 9 MILES SOUTHWEST OF MYRE BIG ISLAND STATE
PARK...AND MOVING SOUTHEAST AT 60 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
LONDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4350 9306 4350 9364 4358 9365 4371 9330
      4385 9313 4385 9305 4384 9304 4378 9304
      4360 9305
TIME...MOT...LOC 2346Z 294DEG 53KT 4391 9270 4371 9284
          4358 9308 4350 9334

HAIL...<.75IN
WIND...60MPH

$$

538 
WWUS53 KMPX 202352
SVSMPX

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

MNC047-210002-
/O.EXP.KMPX.SV.W.0137.000000T0000Z-140921T0000Z/
FREEBORN MN-
652 PM CDT SAT SEP 20 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FREEBORN COUNTY
WILL EXPIRE AT 700 PM CDT...

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

LAT...LON 4350 9306 4350 9364 4358 9365 4371 9330
      4385 9313 4385 9305 4384 9304 4378 9304
      4360 9305
TIME...MOT...LOC 2352Z 294DEG 53KT 4386 9259 4366 9273
          4354 9297 4346 9324

$$

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, 5:43 PM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	32 min
Sep 20, 6:02 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	43 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.