Alert archive / Minnesota / Tornado Warnings in 2008

Tornado Warning 38, NWS Twin Cities, MN

July 11, 2008Wright County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 11, 2008, 7:24 PM CDT for Wright County, Minnesota. It was in force for 36 min. 6 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
Jul 11, 2008, 7:24 PM CDT (00:24 UTC)
Expired
Jul 11, 2008, 8:00 PM CDT
In force
36 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

County Wright County, MN

The radar

The Minneapolis radar (KMPX), 50 km from the middle of the area, began a volume at 00:26 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

TimeReportWhereRemark
Jul 11, 7:51 PM CDTHAIL 0.75Monticello, MNOCCURRED AT INTERSECTION OF 25 AND 137TH.
Jul 11, 7:53 PM CDTTSTM WND GST 65Monticello, MNDEBRIS ON ROAD, LARGE BRANCHES DOWNED.
Jul 11, 7:55 PM CDTFUNNEL CLOUDMonticello, MN
Jul 11, 7:55 PM CDTTSTM WND DMG1 E Albertville, MN12 INCH TREE DOWN BLOCKING ROAD AT INTERSECTION OF HIGHWAY 37 AND I94. TIME ESTIMATED BY RADAR.
Jul 11, 8:00 PM CDTTSTM WND DMGMontrose, MNCOMMERCIAL GREENHOUSE TOPPLED OVER NEAR COUNTY ROAD 12 AND HIGHWAY 12.
Jul 11, 8:08 PM CDTTSTM WND DMGMonticello, MNSEVENTEEN INCH DIAMETER TREE DOWN. FIFTEEN INCH DIAMETER TREE TOPPLED. TOTAL OF 5 TREES DOWNED.

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.

IssuedProductOfficeLasted
Jul 11, 2:26 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.4 hours before the alert went out and 49 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 00:00Z on 2008-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2916 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 00:00Z on 2008-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.19395878Sfc1 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
2916 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1332 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
253 m²/s²
Significant tornado parameter
1.6
Supercell composite
12.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KMPX 120024
TORMPX
MNC171-120100-
/O.NEW.KMPX.TO.W.0038.080712T0024Z-080712T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
724 PM CDT FRI JUL 11 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 800 PM CDT

* AT 721 PM CDT...RADAR INDICATED A LINE OF STORMS CAPABLE OF
  PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORMS WAS ALONG
  A LINE EXTENDING FROM 3 MILES SOUTHWEST OF SOUTH HAVEN TO 5 MILES
  WEST OF STOCKHOLM...AND MOVING EAST AT 45 MPH.

* SOME LOCATIONS INCLUDE...
  STOCKHOLM...
  ANNANDALE...
  COKATO...
  SMITH LAKE...
  HOWARD LAKE...
  MAPLE LAKE...
  RASSAT...
  SILVER CREEK...
  ENFIELD...
  WAVERLY...
  MONTROSE...
  BUFFALO...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4520 9365 4516 9365 4505 9378 4503 9425
      4531 9426 4532 9418 4530 9416 4534 9411
      4538 9390 4530 9376 4530 9366 4525 9352
TIME...MOT...LOC 0024Z 268DEG 38KT 4525 9420 4506 9427

$$
2 follow-up statements
000 
WWUS53 KMPX 120040
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
739 PM CDT FRI JUL 11 2008

MNC171-120100-
/O.CON.KMPX.TO.W.0038.000000T0000Z-080712T0100Z/
WRIGHT MN-
739 PM CDT FRI JUL 11 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR WRIGHT
COUNTY...

AT 735 PM CDT...A WALL CLOUD WAS REPORTED BY A TRAINED SPOTTER FOUR 
MILES NORTH OF COKATO.

AT 738 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG
ROTATION.  THE TORNADIC THUNDERSTORM WAS LOCATED NEAR RASSAT...OR
ABOUT 3 MILES SOUTH OF MAPLE LAKE...AND MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE STOCKHOLM...SMITH LAKE...
SILVER CREEK...RASSAT...ENFIELD...WAVERLY...ST MICHAEL...SOUTH
HAVEN...MONTROSE AND MAPLE LAKE.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4520 9365 4516 9365 4505 9378 4503 9425
      4531 9426 4532 9418 4530 9416 4534 9411
      4538 9390 4530 9376 4530 9366 4525 9352
TIME...MOT...LOC 0039Z 255DEG 53KT 4518 9397

$$

KAT
000 
WWUS53 KMPX 120048
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
748 PM CDT FRI JUL 11 2008

MNC171-120100-
/O.CON.KMPX.TO.W.0038.000000T0000Z-080712T0100Z/
WRIGHT MN-
748 PM CDT FRI JUL 11 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR WRIGHT
COUNTY...

AT 747 PM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO.  THE MOST DANGEROUS
PART OF THE STORMS WAS LOCATED ALONG A LINE EXTENDING FROM 6 MILES
NORTHEAST OF SILVER CREEK TO 3 MILES EAST OF MONTROSE...AND MOVING
EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE STOCKHOLM...SMITH LAKE...
SILVER CREEK...RASSAT...WAVERLY...ST MICHAEL...MONTROSE...MAPLE
LAKE...HOWARD LAKE AND BUFFALO.

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4520 9365 4516 9365 4513 9372 4505 9378
      4503 9423 4511 9414 4525 9410 4538 9390
      4529 9376 4530 9366 4525 9352
TIME...MOT...LOC 0048Z 255DEG 53KT 4535 9381 4507 9383

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 7:10 PM CDTTornado WarningMPXMcLeod, Meeker39 min
Jul 11, 7:16 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Sherburne, Wright44 min
Jul 11, 7:28 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Sibley47 min
Jul 11, 7:37 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet53 min
Jul 11, 7:43 PM CDTSevere Thunderstorm WarningMPXIsanti, Kanabec47 min
Jul 11, 7:43 PM CDTSevere Thunderstorm WarningMPXRenville17 min
Jul 11, 7:56 PM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Chisago, Hennepin, Ramsey, Washington64 min
Jul 11, 8:03 PM CDTSevere Thunderstorm WarningMPXSherburne27 min
Jul 11, 8:10 PM CDTSevere Thunderstorm WarningMPXCarver, Sibley35 min
Jul 11, 8:19 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice, Scott56 min
Jul 11, 8:26 PM CDTSevere Thunderstorm WarningMPXIsanti19 min
Jul 11, 8:30 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet45 min
Jul 11, 8:36 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice54 min
Jul 11, 8:46 PM CDTTornado WarningMPXChisago, Washington20 min
Jul 11, 9:14 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Rice, Steele, Waseca61 min
Jul 11, 9:29 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice61 min
Jul 11, 10:13 PM CDTSevere Thunderstorm WarningMPXFreeborn47 min
Jul 11, 10:18 PM CDTSevere Thunderstorm WarningMPXSteele19 min
Jul 12, 3:45 AM CDTWind AdvisoryMPXChippewa, Douglas, Lac qui Parle, Pope, Stevens, Swift and 1 more15 hr

Nearby

Tornado Warnings in Minnesota, 2008Every tornado warning in 2008Tornadoes 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.