Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 2, NWS Twin Cities, MN

May 1, 2008Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 1, 2008, 8:24 PM CDT for Redwood 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 1, 2008, 8:24 PM CDT (01:24 UTC)
Expired: May 1, 2008, 9:00 PM CDT
In force: 36 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Redwood County, MN

The radar

The Sioux Falls radar (KFSD), 137 km from the middle of the area, began a volume at 01:25 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.4 hours before the alert went out and 154 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: 1402 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 020124
SVRMPX
MNC127-020200-
/O.NEW.KMPX.SV.W.0002.080502T0124Z-080502T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
824 PM CDT THU MAY 1 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN REDWOOD COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 900 PM CDT

* AT 820 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED 9
  MILES SOUTH OF LUCAN...OR ABOUT 4 MILES NORTH OF WALNUT GROVE...AND
  MOVING NORTH AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LUCAN...
  MILROY...
  SEAFORTH...
  VESTA...

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.

LAT...LON 4454 9558 4453 9525 4421 9532 4425 9552
TIME...MOT...LOC 0124Z 166DEG 31KT 4432 9545

$$

KAT

2 follow-up statements

000 
WWUS53 KMPX 020141
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
841 PM CDT THU MAY 1 2008

MNC127-020200-
/O.CON.KMPX.SV.W.0002.000000T0000Z-080502T0200Z/
REDWOOD MN-
841 PM CDT THU MAY 1 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR WESTERN REDWOOD COUNTY...

AT 837 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THESE SEVERE
THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES WEST
OF VESTA TO 3 MILES NORTH OF LUCAN TO 6 MILES SOUTHEAST OF LUCAN...
AND MOVING NORTH AT 36 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE VESTA...SEAFORTH AND LUCAN.

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 4429 9530 4441 9554 4454 9558 4453 9525
      4450 9526 4450 9527 4447 9526
TIME...MOT...LOC 0141Z 176DEG 31KT 4452 9556 4449 9541
          4439 9531

$$

KAT

000 
WWUS53 KMPX 020154
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
853 PM CDT THU MAY 1 2008

MNC127-020203-
/O.EXP.KMPX.SV.W.0002.000000T0000Z-080502T0200Z/
REDWOOD MN-
853 PM CDT THU MAY 1 2008

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN REDWOOD COUNTY EXPIRES
AT 900 PM CDT...

THUNDERSTORMS HAD DECREASED TO BELOW SEVERE LEVELS. HOWEVER... 
THUNDERSTORMS WILL PERSIST ACROSS THE AREA. REMAIN ALERT FOR 
POSSIBLE ADDITIONAL WARNINGS.

LAT...LON 4429 9530 4441 9554 4454 9558 4453 9525
      4450 9526 4450 9527 4447 9526
TIME...MOT...LOC 0153Z 176DEG 31KT 4462 9557 4459 9542
          4449 9532

$$

KAT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 9:08 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Watonwan	37 min
May 1, 9:41 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	49 min
May 1, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Renville, Sibley	27 min
May 2, 3:51 AM CDT	Wind Advisory	MPX	Benton, Blue Earth, Brown, Chippewa, Douglas, Faribault and 20 more	29 hr
May 2, 4:08 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	52 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.