Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 4, NWS Twin Cities, MN

May 7, 2014Freeborn County, Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 7, 2014, 6:04 AM CDT for Freeborn County, Steele County, Minnesota. It was in force for 41 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: May 7, 2014, 6:04 AM CDT (11:04 UTC)
Expired: May 7, 2014, 6:45 AM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Freeborn County, MN, Steele County, MN

The radar

The Minneapolis radar (KMPX), 117 km from the middle of the area, began a volume at 11:25 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
May 7, 6:19 AM CDT	HAIL 0.75	Ellendale, MN
May 7, 6:25 AM CDT	HAIL 1	1 E Clarks Grove, MN	REPORTED VIA TWITTER

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.1 hours before the alert went out and 118 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: 2079 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 278 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.

039 
WUUS53 KMPX 071104
SVRMPX
MNC047-147-071145-
/O.NEW.KMPX.SV.W.0004.140507T1104Z-140507T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
604 AM CDT WED MAY 7 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHERN STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 645 AM CDT

* AT 602 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES
  NORTHWEST OF ALBERT LEA...AND MOVING EAST AT 30 MPH.

  HAZARD...QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED.

* LOCATIONS IMPACTED INCLUDE...
  HARTLAND...MANCHESTER...ALBERT LEA AIRPORT...CLARKS GROVE...
  ELLENDALE...GENEVA...HOLLANDALE...STEELE CENTER...BLOOMING PRAIRIE
  AND BIXBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4364 9364 4384 9364 4385 9357 4385 9341
      4389 9340 4397 9305 4370 9306
TIME...MOT...LOC 1103Z 262DEG 24KT 4373 9354

HAIL...1.00IN
WIND...<50MPH

$$

1 follow-up statement

097 
WWUS53 KMPX 071133
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
633 AM CDT WED MAY 7 2014

MNC047-147-071145-
/O.CON.KMPX.SV.W.0004.000000T0000Z-140507T1145Z/
FREEBORN MN-STEELE MN-
633 AM CDT WED MAY 7 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
STEELE AND NORTHERN FREEBORN COUNTIES UNTIL 645 AM CDT...

AT 629 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES NORTHEAST
OF ALBERT LEA...AND MOVING EAST AT 30 MPH.

HAZARD...QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED. PENNY SIZE HAIL WAS REPORTED IN ELLENDALE.

IMPACT...DAMAGE TO VEHICLES IS EXPECTED.

LOCATIONS IMPACTED INCLUDE...
GENEVA...HOLLANDALE...BLOOMING PRAIRIE...STEELE CENTER AND BIXBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4366 9350 4385 9351 4385 9341 4389 9340
      4397 9305 4370 9306
TIME...MOT...LOC 1132Z 262DEG 24KT 4376 9327

HAIL...1.00IN
WIND...<50MPH

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 2:59 AM CDT	Special Weather Statement	MPX	Martin	46 min
May 7, 4:18 AM CDT	Severe Thunderstorm Warning	MPX	Martin	27 min
May 7, 4:51 AM CDT	Special Weather Statement	MPX	Martin	24 min
May 7, 5:33 AM CDT	Special Weather Statement	MPX	Waseca	27 min
May 7, 1:39 PM CDT	Special Weather Statement	MPX	Lac qui Parle	36 min
May 7, 2:26 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	64 min
May 7, 6:09 PM CDT	Special Weather Statement	MPX	Faribault, Martin, Watonwan	36 min
May 7, 6:22 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Martin, Watonwan	53 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.