Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 39, NWS Twin Cities, MN

May 29, 2008Dakota County, Hennepin County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 29, 2008, 5:24 PM CDT for Dakota County, Hennepin County, Scott County, Minnesota. It was in force for 19 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 29, 2008, 5:24 PM CDT (22:24 UTC)
Expired: May 29, 2008, 5:43 PM CDT
In force: 19 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Dakota County, MN, Hennepin County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 26 km from the middle of the area, began a volume at 22:25 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 29, 5:29 PM CDT	HAIL 0.75	2 Ssw Savage, MN	LARGEST HAIL MEASURED 0.78 INCH AND THE AVERAGE WAS 0.5 INCH.
May 29, 5:37 PM CDT	HAIL 0.5	Bloomington, MN	AT PORTLAND AND 98TH.

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 12:00Z, 10.4 hours before the alert went out and 29 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: 1093 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 61 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.

000 
WUUS53 KMPX 292224
SVRMPX
MNC037-053-139-292300-
/O.NEW.KMPX.SV.W.0039.080529T2224Z-080529T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
524 PM CDT THU MAY 29 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 600 PM CDT

* AT 521 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED    
  NEAR PRIOR LAKE...AND MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SAVAGE...
  LAKEVILLE...
  BURNSVILLE...
  BLOOMINGTON...
  APPLE VALLEY...
  EAGAN...
  ROSEMOUNT...
  WEST ST PAUL...
  FORT SNELLING...

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.

REPORT ANY DAMAGE TO YOUR LOCAL EMERGENCY MANAGER...OR THE NEAREST
LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4465 9346 4475 9352 4491 9315 4491 9314
      4492 9313 4494 9308 4469 9298
TIME...MOT...LOC 2224Z 243DEG 44KT 4474 9338

$$

KAT

2 follow-up statements

000 
WWUS53 KMPX 292237
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
536 PM CDT THU MAY 29 2008

MNC139-292246-
/O.CAN.KMPX.SV.W.0039.000000T0000Z-080529T2300Z/
SCOTT MN-
536 PM CDT THU MAY 29 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SCOTT COUNTY IS
CANCELLED...

DOPPLER RADAR INDICATED THAT THE SEVERE STORM HAD MOVED OUT OF THE 
WARNED AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED.

LAT...LON 4475 9301 4472 9332 4481 9332 4491 9315
      4491 9314 4492 9313 4493 9310 4493 9308
TIME...MOT...LOC 2236Z 245DEG 48KT 4481 9317

$$

MNC037-053-292300-
/O.CON.KMPX.SV.W.0039.000000T0000Z-080529T2300Z/
HENNEPIN MN-DAKOTA MN-
536 PM CDT THU MAY 29 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN DAKOTA AND EXTREME SOUTHEASTERN HENNEPIN COUNTIES...

AT 533 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS SEVERE
THUNDERSTORM WAS LOCATED 3 MILES NORTH OF APPLE VALLEY...AND MOVING
NORTHEAST AT 55 MPH.

THE STORM HAS DECREASED IN INTENSITY OVER THE PAST 10 MINUTES...BUT 
REMAINS CAPABLE OF PRODUCING HAIL TO THE SIZE OF PENNIES. AT 530 PM 
CDT...PEA SIZE HAIL WAS REPORTED IN BURNSVILLE.

OTHER LOCATIONS IN THE WARNING INCLUDE SUNFISH...MENDOTA...WEST 
SAINT PAUL...ROSEMOUNT...MENDOTA HEIGHTS...INVER GROVE 
HEIGHTS...EAGAN...BURNSVILLE AND APPLE VALLEY.

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.

REPORT ANY DAMAGE TO YOUR LOCAL EMERGENCY MANAGER...OR THE NEAREST
LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4475 9301 4472 9332 4481 9332 4491 9315
      4491 9314 4492 9313 4493 9310 4493 9308
TIME...MOT...LOC 2236Z 245DEG 48KT 4481 9317

$$

KAT

000 
WWUS53 KMPX 292243
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
543 PM CDT THU MAY 29 2008

MNC037-053-292253-
/O.CAN.KMPX.SV.W.0039.000000T0000Z-080529T2300Z/
HENNEPIN MN-DAKOTA MN-
543 PM CDT THU MAY 29 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAKOTA AND
EXTREME SOUTHEASTERN HENNEPIN COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED. 
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. 
HEAVY RAIN...PEA SIZE HAIL...AND DEADLY LIGHTNING WILL CONTINUE TO 
BE POSSIBLE OVER NORTHERN DAKOTA COUNTY THROUGH 630 PM.

LAT...LON 4475 9301 4472 9332 4481 9332 4491 9315
      4491 9314 4492 9313 4493 9310 4493 9308
TIME...MOT...LOC 2243Z 245DEG 48KT 4484 9305

$$

KAT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 9:17 AM CDT	Flash Flood Watch	MPX	Blue Earth, Brown, Faribault, Freeborn, Martin, Steele and 2 more	16 hr
May 29, 4:43 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Le Sueur, Scott, Sibley	32 min
May 29, 5:06 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	24 min
May 29, 5:55 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008 Every severe thunderstorm warning in 2008

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.