Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 77, NWS Twin Cities, MN

May 31, 20084 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 31, 2008, 6:26 PM CDT for 4 counties in Minnesota. It was in force for 50 min. 9 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 31, 2008, 6:26 PM CDT (23:26 UTC)
Expired: May 31, 2008, 7:16 PM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

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

The radar

The Minneapolis radar (KMPX), 35 km from the middle of the area, began a volume at 23:28 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 31, 6:28 PM CDT	HAIL 1	Edina, MN	HIGHWAY 100 AND 50TH. SIGNIFICANT DAMAGE TO TREES AND VEGETATION.
May 31, 6:28 PM CDT	HAIL 1	Golden Valley, MN	NEAR EXCELSIOR AND HAWTHORNE.
May 31, 6:28 PM CDT	HAIL 1.75	St Louis Park, MN	HIGHWAY 100 AND MINNETONKA
May 31, 6:32 PM CDT	HAIL 1	Golden Valley, MN	HIGHWAY 100 AND INTERSTATE 394.
May 31, 6:35 PM CDT	HAIL 0.75	Minneapolis, MN	NEAR LORING PARK ON EDGE OF DOWNTOWN.
May 31, 6:35 PM CDT	HAIL 1	Edina, MN	HIGHWAY 100 AND INTERSTATE 494.
May 31, 6:42 PM CDT	TSTM WND DMG	Burnsville, MN	ROOF PARTIALLY OFF BUILDING NEAR CLIFF ROAD AND 12TH. REPORTED BY NON-NWS METEOROLOGISTS.
May 31, 6:55 PM CDT	HAIL 1.75	Eagan, MN	INTERSTATE 35E AND CLIFF ROAD.
May 31, 7:00 PM CDT	HAIL 1	Apple Valley, 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
May 31, 2:51 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 38 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: 16 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 7 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 312327
SVRMPX
MNC037-053-123-139-010030-
/O.NEW.KMPX.SV.W.0077.080531T2326Z-080601T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
626 PM CDT SAT MAY 31 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 730 PM CDT

* AT 624 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR ST
  LOUIS PARK...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MAPLEWOOD...
  EDEN PRAIRIE...
  ST PAUL...
  EDINA...
  RICHFIELD...
  BLOOMINGTON...
  SOUTH ST PAUL...
  EAGAN...
  SAVAGE...
  PRIOR LAKE...
  BURNSVILLE...
  APPLE VALLEY...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER LINES.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4470 9301 4469 9345 4499 9349 4500 9302
      4482 9301 4479 9302 4477 9301
TIME...MOT...LOC 2326Z 336DEG 26KT 4492 9331

$$

3 follow-up statements

000 
WWUS53 KMPX 312338
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
637 PM CDT SAT MAY 31 2008

MNC037-053-123-139-010030-
/O.CON.KMPX.SV.W.0077.000000T0000Z-080601T0030Z/
HENNEPIN MN-RAMSEY MN-DAKOTA MN-SCOTT MN-
637 PM CDT SAT MAY 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHEASTERN SCOTT...NORTHWESTERN DAKOTA...SOUTHERN RAMSEY AND
SOUTHEASTERN HENNEPIN COUNTIES...

AT 633 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF
BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS SEVERE
THUNDERSTORM WAS LOCATED NEAR EDINA...OR ABOUT 2 MILES WEST OF
RICHFIELD...AND MOVING SOUTHEAST AT 25 MPH.

TRAINED SPOTTERS ALSO INDCIATED ROTATING CLOUDS WITH THIS STORM.

OTHER LOCATIONS IN THE WARNING INCLUDE 
SUNFISH...MENDOTA...LILYDALE...WEST ST PAUL...ST PAUL...ST LOUIS 
PARK...SOUTH ST PAUL...SAVAGE AND ROSEMOUNT.

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. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

LAT...LON 4470 9301 4469 9345 4499 9349 4500 9302
      4482 9301 4479 9302 4477 9301
TIME...MOT...LOC 2337Z 334DEG 21KT 4487 9331

$$

000 
WWUS53 KMPX 312348
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
648 PM CDT SAT MAY 31 2008

MNC037-053-123-139-010030-
/O.CON.KMPX.SV.W.0077.000000T0000Z-080601T0030Z/
HENNEPIN MN-RAMSEY MN-DAKOTA MN-SCOTT MN-
648 PM CDT SAT MAY 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHEASTERN SCOTT...NORTHWESTERN DAKOTA...SOUTHWESTERN RAMSEY
AND SOUTHEASTERN HENNEPIN COUNTIES...

AT 647 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF
BALL SIZE AND DAMAGING WINDS IN EXCESS OF 65 MPH.  THESE SEVERE
THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM SUNFISH TO
EAGAN TO 3 MILES WEST OF EAGAN TO RICHFIELD...AND MOVING SOUTHEAST AT
30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SUNFISH...MENDOTA...
LILYDALE...WEST ST PAUL...ST PAUL...SOUTH ST PAUL...SAVAGE...
ROSEMOUNT...RICHFIELD AND MENDOTA HEIGHTS.

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. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

LAT...LON 4469 9342 4470 9345 4488 9339 4498 9303
      4482 9301 4479 9302 4477 9301 4470 9301
TIME...MOT...LOC 2348Z 317DEG 26KT 4485 9307 4481 9317
          4481 9322 4484 9326

$$

000 
WWUS53 KMPX 010016
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
716 PM CDT SAT MAY 31 2008

MNC037-053-123-139-010026-
/O.CAN.KMPX.SV.W.0077.000000T0000Z-080601T0030Z/
HENNEPIN MN-RAMSEY MN-DAKOTA MN-SCOTT MN-
716 PM CDT SAT MAY 31 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SCOTT...
NORTHWESTERN DAKOTA...SOUTHERN RAMSEY AND SOUTHEASTERN HENNEPIN
COUNTIES 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 4469 9342 4470 9345 4488 9339 4498 9303
      4482 9301 4479 9302 4477 9301 4470 9301
TIME...MOT...LOC 0016Z 317DEG 26KT 4470 9288 4466 9298
          4466 9303 4469 9307

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:09 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	36 min
May 31, 2:24 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur	51 min
May 31, 3:08 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Steele, Waseca	67 min
May 31, 4:15 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	48 min
May 31, 4:15 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne	60 min
May 31, 4:23 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	67 min
May 31, 4:43 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs, Morrison	62 min
May 31, 5:01 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Wright	59 min
May 31, 5:16 PM CDT	Tornado Warning	MPX	Sherburne, Wright	44 min
May 31, 5:25 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey	65 min
May 31, 5:28 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Morrison	62 min
May 31, 5:38 PM CDT	Tornado Warning	MPX	Hennepin, Wright	40 min
May 31, 6:17 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	58 min
May 31, 6:44 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs, Morrison	46 min
May 31, 6:45 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Washington	45 min
May 31, 6:55 PM CDT	Tornado Warning	MPX	Anoka, Chisago, Washington	50 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.