Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 29, NWS Twin Cities, MN

June 23, 20094 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 23, 2009, 1:03 PM CDT for 4 counties in Minnesota. It was in force for 57 min. 2 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 23, 2009, 1:03 PM CDT (18:03 UTC)
Expired: Jun 23, 2009, 2:00 PM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Blue Earth County, MN, Faribault County, MN, Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 95 km from the middle of the area, began a volume at 18:05 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

Time	Report	Where	Remark
Jun 23, 1:40 PM CDT	TSTM WND GST 50	Mankato, MN	SPOTTER LOCATED AT HIGHWAYS 169 AND 14
Jun 23, 1:55 PM CDT	HAIL 0.88	1 Sw Blue Earth, MN	LOCAL EM ESTIMATED NICKEL SIZE HAIL SOUTHWEST OF BLUE EARTH

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.

Issued	Product	Office	Lasted
Jun 23, 12:01 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.1 hours before the alert went out and 94 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: 45 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 2073 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 231803
SVRMPX
MNC013-043-103-143-231900-
/O.NEW.KMPX.SV.W.0029.090623T1803Z-090623T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
103 PM CDT TUE JUN 23 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SIBLEY COUNTY IN CENTRAL MINNESOTA...
  NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 200 PM CDT

* AT 101 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 65 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9
  MILES SOUTHWEST OF ST GEORGE TO 16 MILES WEST OF VERNON CENTER TO
  29 MILES WEST OF ELMORE...AND MOVING EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ST GEORGE...
  COURTLAND...
  KLOSSNER...
  LAFAYETTE...
  VERNON CENTER...
  AMBOY...
  NICOLLET...
  WINNEBAGO...
  GOOD THUNDER...
  NORTH MANKATO...
  MANKATO...
  BLUE EARTH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
TUESDAY EVENING FOR SOUTHERN MINNESOTA.

&&

LAT...LON 4385 9425 4385 9437 4426 9438 4437 9453
      4440 9467 4445 9475 4463 9398 4450 9389
      4439 9396 4434 9394 4424 9402 4424 9377
      4393 9377 4350 9390 4349 9394 4350 9425
TIME...MOT...LOC 1803Z 252DEG 28KT 4437 9470 4402 9445
          4343 9463

$$

TRH

3 follow-up statements

000 
WWUS53 KMPX 231828
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
128 PM CDT TUE JUN 23 2009

MNC013-043-103-143-231900-
/O.CON.KMPX.SV.W.0029.000000T0000Z-090623T1900Z/
SIBLEY MN-NICOLLET MN-BLUE EARTH MN-FARIBAULT MN-
128 PM CDT TUE JUN 23 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR FARIBAULT...BLUE EARTH...NICOLLET AND SOUTHERN SIBLEY COUNTIES...

AT 124 PM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 65 MPH. THESE SEVERE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM 4 MILES EAST OF ST GEORGE TO 3 MILES SOUTH OF
LAKE CRYSTAL TO 15 MILES SOUTHWEST OF GUCKEEN...AND MOVING EAST AT 30
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...LAFAYETTE...VERNON CENTER...
HUNTLEY...GUCKEEN...WINNEBAGO...NICOLLET...SKYLINE...GOOD THUNDER...
NEW SWEDEN...NORTH MANKATO...MANKATO AND BLUE EARTH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THESE STORMS.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
TUESDAY EVENING FOR SOUTHERN MINNESOTA.

&&

LAT...LON 4350 9425 4384 9425 4385 9437 4426 9438
      4437 9453 4440 9462 4449 9461 4463 9398
      4450 9389 4439 9396 4434 9394 4424 9402
      4424 9377 4393 9377 4350 9390 4349 9394
TIME...MOT...LOC 1828Z 252DEG 28KT 4443 9444 4408 9419
          4349 9438

$$

TRH

000 
WWUS53 KMPX 231837
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
137 PM CDT TUE JUN 23 2009

MNC013-043-103-143-231900-
/O.CON.KMPX.SV.W.0029.000000T0000Z-090623T1900Z/
SIBLEY MN-NICOLLET MN-BLUE EARTH MN-FARIBAULT MN-
137 PM CDT TUE JUN 23 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR FARIBAULT...BLUE EARTH...NICOLLET AND SOUTHERN SIBLEY COUNTIES...

AT 135 PM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 65 MPH. THESE SEVERE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM WINTHROP TO 3 MILES SOUTHWEST OF SKYLINE TO 9
MILES WEST OF ELMORE...AND MOVING NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...NORTH MANKATO...MANKATO...
ELMORE...NEW SWEDEN...BLUE EARTH...NORSELAND...ST PETER...MAPLETON...
GAYLORD...RUSH RIVER...ST CLAIR AND NEW ROME.

SOME OF THE DAMAGING WINDS ASSOCIATED WITH THESE STORMS WILL BE 
EXPERIENCED BEFORE THE RAINFALL ASSOCIATED WITH THE STORMS ARRIVES 
BY AS MUCH AS 5 TO 10 MINUTES. SEEK SHELTER WELL BEFORE THE STORMS 
ARRIVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THESE STORMS.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
TUESDAY EVENING FOR SOUTHERN MINNESOTA.

&&

LAT...LON 4350 9425 4385 9425 4385 9437 4426 9438
      4450 9457 4463 9398 4450 9389 4439 9396
      4434 9394 4424 9402 4424 9377 4393 9377
      4350 9390
TIME...MOT...LOC 1836Z 246DEG 27KT 4453 9440 4411 9406
          4352 9425

$$

TRH

000 
WWUS53 KMPX 231859
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
159 PM CDT TUE JUN 23 2009

MNC013-043-103-143-231908-
/O.EXP.KMPX.SV.W.0029.000000T0000Z-090623T1900Z/
SIBLEY MN-NICOLLET MN-BLUE EARTH MN-FARIBAULT MN-
159 PM CDT TUE JUN 23 2009

...THE SEVERE THUNDERSTORM WARNING FOR FARIBAULT...BLUE EARTH...
NICOLLET AND SOUTHERN SIBLEY COUNTIES EXPIRES AT 200 PM CDT...

SEVERE STORMS OVER THE AREA HAVE WEAKENED BELOW SEVERE LEVELS... AND 
WILL MOVE EAST OF THE AREA BETWEEN 200 PM AND 230 PM CDT. WIND GUSTS 
TO 50 MPH AND PEA SIZE HAIL ARE STILL POSSIBLE WITH THESE STORMS. 
ADDITIONAL THUNDERSTORMS MAY DEVELOP IN THE AREA THIS AFTERNOON... 
REMAIN ALERT FOR ADDITIONAL WARNINGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
TUESDAY EVENING FOR SOUTHERN MINNESOTA.

LAT...LON 4350 9425 4385 9425 4385 9437 4426 9438
      4450 9457 4463 9398 4450 9389 4439 9396
      4434 9394 4424 9402 4424 9377 4393 9377
      4350 9390
TIME...MOT...LOC 1858Z 246DEG 27KT 4460 9419 4418 9385
          4359 9404

$$

TRH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:47 AM CDT	Excessive Heat Warning	MPX	Hennepin, Ramsey	12 hr
Jun 23, 3:47 AM CDT	Heat Advisory	MPX	Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 22 more	12 hr
Jun 23, 12:13 PM CDT	Special Weather Statement	MPX	Brown, Martin, Watonwan	77 min
Jun 23, 12:29 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Martin, Watonwan	61 min
Jun 23, 12:56 PM CDT	Special Weather Statement	MPX	Blue Earth, Nicollet, Sibley	64 min
Jun 23, 1:48 PM CDT	Special Weather Statement	MPX	Freeborn, Le Sueur, Rice, Scott, Steele, Waseca	72 min
Jun 23, 2:06 PM CDT	Special Weather Statement	MPX	Morrison	24 min
Jun 23, 2:22 PM CDT	Special Weather Statement	MPX	Morrison	53 min
Jun 23, 2:45 PM CDT	Special Weather Statement	MPX	Morrison	60 min
Jun 23, 2:57 PM CDT	Special Weather Statement	MPX	Freeborn, Steele	48 min
Jun 23, 3:14 PM CDT	Special Weather Statement	MPX	Freeborn	46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2009 Every severe thunderstorm warning 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.