Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 286, NWS Twin Cities, MN

August 27, 2008Brown County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 27, 2008, 7:19 PM CDT for Brown County, Minnesota. It was in force for 41 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: Aug 27, 2008, 7:19 PM CDT (00:19 UTC)
Expired: Aug 27, 2008, 8:00 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Brown County, MN

The radar

The Minneapolis radar (KMPX), 115 km from the middle of the area, began a volume at 00:20 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, 0.3 hours before the alert went out and 113 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: 287 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 280019
SVRMPX
MNC015-280100-
/O.NEW.KMPX.SV.W.0286.080828T0019Z-080828T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
719 PM CDT WED AUG 27 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 800 PM CDT

* AT 716 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED 10 MILES
  SOUTHWEST OF SPRINGFIELD...OR ABOUT 18 MILES NORTH OF WINDOM...AND
  MOVING NORTHEAST AT 44 MPH.

* SOME LOCATIONS INCLUDE...
  COMFREY...
  SPRINGFIELD...
  SLEEPY EYE...
  NEW ULM...

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.

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 4411 9511 4423 9511 4429 9498 4428 9487
      4434 9487 4441 9469 4437 9458 4437 9453
      4433 9445 4430 9444 4426 9439 4409 9490
TIME...MOT...LOC 0020Z 242DEG 39KT 4415 9506

$$

KAT

1 follow-up statement

000 
WWUS53 KMPX 280033
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
733 PM CDT WED AUG 27 2008

MNC015-280100-
/O.CON.KMPX.SV.W.0286.000000T0000Z-080828T0100Z/
BROWN MN-
734 PM CDT WED AUG 27 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR BROWN COUNTY...

AT 733 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THE SEVERE STORM WAS LOCATED 
NEAR COMFREY...AND MOVING NORTHEAST AT 44 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SPRINGFIELD...SLEEPY EYE...NEW
ULM...EVAN...COMFREY AND COBDEN.

PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4411 9511 4423 9511 4429 9498 4428 9487
      4434 9487 4441 9469 4437 9458 4437 9453
      4433 9445 4430 9444 4426 9439 4409 9490
TIME...MOT...LOC 0034Z 243DEG 38KT 4413 9492

$$

KAT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:58 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet	27 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.