Alert archive / Minnesota / Tornado Warnings in 2009

Tornado Warning 10, NWS Twin Cities, MN

June 18, 2009Douglas County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 18, 2009, 2:27 PM CDT for Douglas County, Minnesota. It was in force for 48 min. 9 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
Jun 18, 2009, 2:27 PM CDT (19:27 UTC)
Expired
Jun 18, 2009, 3:15 PM CDT
In force
48 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 176 km from the middle of the area, began a volume at 19:27 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
Jun 18, 2:28 PM CDTHAIL 0.5Carlos, MN
Jun 18, 2:32 PM CDTHAIL 1.752 N Alexandria, MNLARGE HAIL ACROSS NORTHERN PART OF CITY.
Jun 18, 2:32 PM CDTHAIL 1.75Alexandria, MN
Jun 18, 2:34 PM CDTFUNNEL CLOUDAlexandria, MN2 FUNNELS DOWN AND UP IN CLOUD DID NOT TOUCH GROUND ALSO WITNESSED BY HAM RADIO OPERATOR.
Jun 18, 2:35 PM CDTTSTM WND DMG3 Nne Alexandria, MNTREE DOWN
Jun 18, 2:45 PM CDTHAIL 0.5Nelson, MN
Jun 18, 3:07 PM CDTHAIL 0.882 S Osakis, MN
Jun 18, 3:08 PM CDTHAIL 0.88Osakis, MN
Jun 18, 3:15 PM CDTHAIL 0.88Osakis, MN

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
Jun 18, 1:50 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.5 hours before the alert went out and 174 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 2009-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1400 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 2009-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
1400 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KMPX 181927
TORMPX
MNC041-182015-
/O.NEW.KMPX.TO.W.0010.090618T1927Z-090618T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
227 PM CDT THU JUN 18 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 315 PM CDT

* AT 225 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG
  ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS NEAR
  ALEXANDRIA...OR ABOUT 6 MILES NORTH OF FORADA...AND MOVING EAST AT
  15 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  CARLOS...
  NELSON...
  BELLE RIVER...
  OSAKIS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4593 9515 4593 9514 4579 9514 4577 9549
      4595 9553 4603 9515
TIME...MOT...LOC 1927Z 260DEG 13KT 4588 9538

$$

TRH
2 follow-up statements
000 
WWUS53 KMPX 181958
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
258 PM CDT THU JUN 18 2009

MNC041-182015-
/O.CON.KMPX.TO.W.0010.000000T0000Z-090618T2015Z/
DOUGLAS MN-
258 PM CDT THU JUN 18 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR
SOUTHEASTERN DOUGLAS COUNTY...

AT 256 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG
ROTATION.  THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 3 MILES
SOUTHEAST OF NELSON...OR ABOUT 3 MILES WEST OF OSAKIS...AND MOVING
EAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...OSAKIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FUNNEL CLOUDS HAVE BEEN REPORTED WITH THIS STORM.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR WEST CENTRAL MINNESOTA.

&&

LAT...LON 4593 9530 4596 9515 4593 9515 4593 9514
      4579 9514 4578 9530
TIME...MOT...LOC 1959Z 273DEG 16KT 4587 9520

$$

TRH
000 
WWUS53 KMPX 182015
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
315 PM CDT THU JUN 18 2009

MNC041-182025-
/O.EXP.KMPX.TO.W.0010.000000T0000Z-090618T2015Z/
DOUGLAS MN-
315 PM CDT THU JUN 18 2009

...THE TORNADO WARNING FOR SOUTHEASTERN DOUGLAS COUNTY EXPIRES AT 315
PM CDT...

THE STORM WHICH PROMPTED THE WARNING IS MOVING INTO SOUTHERN TODD 
COUNTY... WHERE A TORNADO WARNING IS IN EFFECT UNTIL 345 PM CDT. A 
TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING 
FOR SOUTHERN MINNESOTA.

LAT...LON 4593 9530 4596 9515 4593 9515 4593 9514
      4579 9514 4578 9530
TIME...MOT...LOC 1958Z 273DEG 16KT 4586 9523

$$

TRH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 7:12 PM CDTTornado WarningMPXBlue Earth, Faribault, Martin, Waseca, Watonwan33 min
Jun 17, 7:14 PM CDTTornado WarningMPXLe Sueur, Rice31 min
Jun 17, 7:16 PM CDTTornado WarningMPXFreeborn, Steele44 min
Jun 17, 7:49 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice, Steele, Waseca56 min
Jun 17, 8:04 PM CDTTornado WarningMPXRice, Steele, Waseca26 min
Jun 17, 8:24 PM CDTTornado WarningMPXSteele33 min
Jun 17, 9:22 PM CDTSpecial Weather StatementMPXGoodhue113 min
Jun 17, 9:53 PM CDTSpecial Weather StatementMPXChisago, Dakota, Goodhue, Ramsey, Washington97 min
Jun 17, 10:48 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Washington42 min
Jun 17, 11:08 PM CDTSpecial Weather StatementMPXDakota52 min
Jun 17, 11:20 PM CDTSevere Thunderstorm WarningMPXGoodhue40 min
Jun 18, 12:55 PM CDTSevere Thunderstorm WarningMPXDouglas50 min
Jun 18, 1:50 PM CDTSevere Thunderstorm WarningMPXDouglas55 min
Jun 18, 2:37 PM CDTSevere Thunderstorm WarningMPXDouglas, Todd53 min
Jun 18, 2:54 PM CDTTornado WarningMPXTodd51 min
Jun 18, 3:33 PM CDTSpecial Weather StatementMPXStearns57 min
Jun 18, 3:41 PM CDTSevere Thunderstorm WarningMPXStearns64 min
Jun 18, 3:48 PM CDTSpecial Weather StatementMPXTodd57 min
Jun 18, 4:16 PM CDTSpecial Weather StatementMPXMorrison59 min
Jun 18, 4:47 PM CDTSevere Thunderstorm WarningMPXMorrison, Stearns43 min
Jun 18, 5:13 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison, Stearns62 min
Jun 18, 6:04 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Morrison56 min
Jun 18, 6:32 PM CDTSevere Thunderstorm WarningMPXKanabec58 min
Jun 18, 6:44 PM CDTSevere Thunderstorm WarningMPXStevens61 min

Nearby

Tornado Warnings in Minnesota, 2009Every tornado warning in 2009Tornadoes in 2009

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.