Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 66, NWS Twin Cities, MN

May 30, 2008Blue Earth County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 30, 2008, 7:09 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2008, 7:09 PM CDT (00:09 UTC)
Expired: May 30, 2008, 7:45 PM CDT
In force: 36 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Blue Earth County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 91 km from the middle of the area, began a volume at 00:10 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 91 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: 727 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 310009
SVRMPX
MNC013-161-310045-
/O.NEW.KMPX.SV.W.0066.080531T0009Z-080531T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
709 PM CDT FRI MAY 30 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 745 PM CDT

* AT 705 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF
  JANESVILLE...AND MOVING EAST AT 33 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JANESVILLE...
  WASECA...
  NEW RICHLAND...
  PEMBERTON...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. 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.

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

LAT...LON 4411 9342 4387 9343 4394 9393 4412 9385
TIME...MOT...LOC 0009Z 286DEG 29KT 4402 9377

$$

MDB

1 follow-up statement

000 
WWUS53 KMPX 310026
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
726 PM CDT FRI MAY 30 2008

MNC013-310036-
/O.CAN.KMPX.SV.W.0066.000000T0000Z-080531T0045Z/
BLUE EARTH MN-
726 PM CDT FRI MAY 30 2008

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BLUE EARTH 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 4392 9376 4410 9361 4411 9342 4408 9343
      4407 9342 4405 9343 4403 9342 4387 9343
TIME...MOT...LOC 0026Z 286DEG 29KT 4397 9357

$$

MNC161-310045-
/O.CON.KMPX.SV.W.0066.000000T0000Z-080531T0045Z/
WASECA MN-
726 PM CDT FRI MAY 30 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHERN WASECA COUNTY...

AT 722 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS SEVERE THUNDERSTORM WAS LOCATED 4
MILES NORTHWEST OF OTISCO...OR ABOUT 9 MILES NORTHWEST OF NEW
RICHLAND...AND MOVING EAST AT 33 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE OTISCO...WASECA...WALDORF AND
NEW RICHLAND.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

LAT...LON 4392 9376 4410 9361 4411 9342 4408 9343
      4407 9342 4405 9343 4403 9342 4387 9343
TIME...MOT...LOC 0026Z 286DEG 29KT 4397 9357

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 6:26 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Scott	50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.