Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 284, NWS Twin Cities, MN

August 13, 2008Chippewa County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 13, 2008, 5:59 PM CDT for Chippewa County, Swift County, Minnesota. It was in force for 38 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 13, 2008, 5:59 PM CDT (22:59 UTC)
Expired
Aug 13, 2008, 6:37 PM CDT
In force
38 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Chippewa County, MN, Swift County, MN

The radar

The Sioux Falls radar (KFSD), 192 km from the middle of the area, began a volume at 23:03 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 12:00Z, 11.0 hours before the alert went out and 191 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2008-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2008-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
178 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1447 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 132259
SVRMPX
MNC023-151-132345-
/O.NEW.KMPX.SV.W.0284.080813T2259Z-080813T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
559 PM CDT WED AUG 13 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHWESTERN CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 645 PM CDT

* AT 556 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED 5 MILES NORTH OF HOLLOWAY...OR ABOUT 13
  MILES WEST OF BENSON...AND MOVING SOUTH AT 22 MPH.

* SOME LOCATIONS INCLUDE...
  HOLLOWAY...
  APPLETON...
  BIG BEND CITY...
  MILAN...

FUNNEL CLOUDS HAD BEEN REPORTED WITH A PREVIOUS STORM. IT IS 
POSSIBLE THIS STORM MAY ALSO PRODUCE A FUNNEL CLOUD.  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.

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 4540 9600 4541 9583 4508 9564 4507 9593
      4514 9605 4517 9607 4517 9609 4518 9611
TIME...MOT...LOC 2258Z 340DEG 19KT 4531 9587

$$

TDK
2 follow-up statements
000 
WWUS53 KMPX 132326
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
626 PM CDT WED AUG 13 2008

MNC023-151-132345-
/O.CON.KMPX.SV.W.0284.000000T0000Z-080813T2345Z/
SWIFT MN-CHIPPEWA MN-
625 PM CDT WED AUG 13 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHWESTERN CHIPPEWA  AND WESTERN SWIFT COUNTIES IN WEST CENTRAL
MINNESOTA...

AT 621 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING HAIL OR DAMAGING WINDS.  THE SEVERE STORM WAS 
LOCATED NEAR HOLLOWAY...AND MOVING SOUTH AT 18 MPH.

LOCATIONS IN THE WARNING INCLUDE BIG BEND CITY...MILAN...HOLLOWAY 
AND APPLETON.

ALTHOUGH THE STORM HAS WEAKENED SOMEWHAT...DAMAGING WINDS MAY STILL 
OCCUR. 

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

LAT...LON 4540 9600 4541 9583 4508 9564 4507 9593
      4514 9605 4517 9607 4517 9609 4518 9611
TIME...MOT...LOC 2325Z 351DEG 15KT 4521 9588

$$

TDK
000 
WWUS53 KMPX 132337
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
637 PM CDT WED AUG 13 2008

MNC023-151-132350-
/O.CAN.KMPX.SV.W.0284.000000T0000Z-080813T2345Z/
SWIFT MN-CHIPPEWA MN-
637 PM CDT WED AUG 13 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHIPPEWA  AND
WESTERN SWIFT COUNTIES IN WEST CENTRAL MINNESOTA IS CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED SIGNIFICANTLY.  
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4540 9600 4541 9583 4508 9564 4507 9593
      4514 9605 4517 9607 4517 9609 4518 9611
TIME...MOT...LOC 2337Z 340DEG 19KT 4512 9577

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 3:37 AM CDTDense Fog AdvisoryMPXAnoka, Carver, Chisago, Dakota, Freeborn, Goodhue and 13 more5 hr
Aug 13, 2:32 PM CDTSevere Thunderstorm WarningMPXDakota43 min
Aug 13, 2:37 PM CDTSevere Thunderstorm WarningMPXYellow Medicine53 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008Every 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.