Alert archive / Iowa / Tornado Warnings in 2011

Tornado Warning 9, NWS Des Moines, IA

March 22, 20115 counties in Iowa

NWS Des Moines, IA issued this tornado warning at Mar 22, 2011, 6:27 PM CDT for 5 counties in Iowa. It was in force for 39 min. 3 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: Mar 22, 2011, 6:27 PM CDT (23:27 UTC)
Expired: Mar 22, 2011, 7:06 PM CDT
In force: 39 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Adair County, IA, Clarke County, IA, Madison County, IA, Union County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 62 km from the middle of the area, began a volume at 23:28 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
Mar 22, 6:36 PM CDT	FUNNEL CLOUD	4 Wnw Lorimor, IA
Mar 22, 6:43 PM CDT	HAIL 1.75	Winterset, IA
Mar 22, 7:14 PM CDT	TORNADO	5 W Winterset, IA	BRIEF TOUCHDOWN.

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
Mar 22, 2:03 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.5 hours before the alert went out and 198 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: 486 J/kg
Mixed-layer CIN: -475 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 477 m²/s²
0-3 km storm-relative helicity: 501 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.

052 
WFUS53 KDMX 222327
TORDMX
IAC001-039-121-175-181-230015-
/O.NEW.KDMX.TO.W.0009.110322T2327Z-110323T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
627 PM CDT TUE MAR 22 2011

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN ADAIR COUNTY IN SOUTHWEST IOWA...
  NORTHERN CLARKE COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHERN MADISON COUNTY IN SOUTH CENTRAL IOWA...
  NORTHERN UNION COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHWESTERN WARREN COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 715 PM CDT

* AT 624 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CRESTON...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WINTERSET...MACKSBURG...LORIMOR...EAST PERU...TRURO...PATTERSON...
  NEW VIRGINIA...ST. CHARLES...ST. MARYS...BEVINGTON AND MARTENSDALE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 40 AND 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.

IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.

IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE 
GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS.

&&

LAT...LON 4122 9434 4133 9425 4140 9358 4116 9356
      4115 9357 4105 9437
TIME...MOT...LOC 2328Z 240DEG 34KT 4110 9429

$$

DONAVON

5 follow-up statements

168 
WWUS53 KDMX 222339
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
639 PM CDT TUE MAR 22 2011

IAC001-222349-
/O.CAN.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
ADAIR IA-
639 PM CDT TUE MAR 22 2011

...THE TORNADO WARNING FOR SOUTHEASTERN ADAIR COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4120 9424 4133 9425 4140 9358 4116 9356
      4115 9357 4111 9422
TIME...MOT...LOC 2339Z 238DEG 46KT 4119 9413

$$

IAC039-121-175-181-230015-
/O.CON.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
UNION IA-CLARKE IA-MADISON IA-WARREN IA-
639 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WARREN...
SOUTHERN MADISON...NORTHERN CLARKE AND NORTHEASTERN UNION COUNTIES
UNTIL 715 PM CDT...

AT 637 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 13 MILES SOUTHWEST OF WINTERSET...OR 13 MILES
NORTHEAST OF CRESTON...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINTERSET...LORIMOR...EAST PERU...TRURO...PATTERSON...NEW
  VIRGINIA...ST. CHARLES...BEVINGTON...ST. MARYS AND MARTENSDALE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 42 AND 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.

IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.

IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE 
GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS.

&&

LAT...LON 4120 9424 4133 9425 4140 9358 4116 9356
      4115 9357 4111 9422
TIME...MOT...LOC 2339Z 238DEG 46KT 4119 9413

$$

DONAVON

281 
WWUS53 KDMX 222349
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
649 PM CDT TUE MAR 22 2011

IAC039-175-222359-
/O.CAN.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
UNION IA-CLARKE IA-
649 PM CDT TUE MAR 22 2011

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 42 AND 43.

...THE TORNADO WARNING FOR NORTHERN CLARKE AND
NORTHEASTERN UNION COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4117 9420 4120 9424 4133 9425 4140 9358
      4116 9356 4116 9391
TIME...MOT...LOC 2349Z 230DEG 33KT 4124 9409

$$

IAC121-181-230015-
/O.CON.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
MADISON IA-WARREN IA-
649 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WARREN AND
SOUTHERN MADISON COUNTIES UNTIL 715 PM CDT...

AT 647 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 9 MILES SOUTHWEST OF WINTERSET...OR 18 MILES
NORTHEAST OF CRESTON...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINTERSET...EAST PERU...TRURO...NEW VIRGINIA...PATTERSON...ST.
  CHARLES...BEVINGTON...MARTENSDALE AND ST. MARYS.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 44 AND 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.

IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.

IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE 
GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS.

&&

LAT...LON 4117 9420 4120 9424 4133 9425 4140 9358
      4116 9356 4116 9391
TIME...MOT...LOC 2349Z 230DEG 33KT 4124 9409

$$

093 
WWUS53 KDMX 222355
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
655 PM CDT TUE MAR 22 2011

IAC121-181-230015-
/O.CON.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
MADISON IA-WARREN IA-
655 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WARREN AND
SOUTHERN MADISON COUNTIES UNTIL 715 PM CDT...

AT 651 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 7 MILES SOUTHWEST OF WINTERSET...OR 20 MILES
NORTHEAST OF CRESTON...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINTERSET...EAST PERU...TRURO...NEW VIRGINIA...PATTERSON...ST.
  CHARLES...BEVINGTON...MARTENSDALE AND ST. MARYS.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 44 AND 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.

IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.

IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE 
GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS.

&&

LAT...LON 4117 9420 4134 9411 4140 9358 4116 9356
      4116 9391
TIME...MOT...LOC 2355Z 230DEG 33KT 4127 9403

$$

DONAVON

563 
WWUS53 KDMX 222359
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
659 PM CDT TUE MAR 22 2011

IAC121-181-230015-
/O.CON.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
MADISON IA-WARREN IA-
659 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL WARREN AND
SOUTHERN MADISON COUNTIES UNTIL 715 PM CDT...

AT 656 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR WINTERSET...OR 23 MILES NORTHEAST OF
CRESTON...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINTERSET...PATTERSON...BEVINGTON AND MARTENSDALE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 54 AND 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.

IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.

IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE 
GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS.

&&

LAT...LON 4124 9391 4117 9420 4134 9411 4140 9358
TIME...MOT...LOC 2359Z 230DEG 33KT 4129 9399

$$

BEERENDS

771 
WWUS53 KDMX 230006
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
706 PM CDT TUE MAR 22 2011

IAC121-181-230015-
/O.CAN.KDMX.TO.W.0009.000000T0000Z-110323T0015Z/
MADISON IA-WARREN IA-
706 PM CDT TUE MAR 22 2011

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 54 AND 57.

...THE TORNADO WARNING FOR WEST CENTRAL WARREN AND SOUTHERN MADISON
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA...HOWEVER ANOTHER STORM IS MOVING INTO WESTERN MADISON COUNTY 
AND THERE IS A DIFFERENT TORNADO WARNING OUT FOR PORTIONS OF MADISON 
COUNTY. 

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 9 PM CDT.

LAT...LON 4124 9391 4117 9420 4134 9411 4140 9358
TIME...MOT...LOC 0005Z 230DEG 33KT 4132 9393

$$

BEERENDS

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 22, 6:30 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	4 days
Mar 22, 10:52 AM CDT	River Flood Warning	DMX	Palo Alto	16 days
Mar 22, 10:52 AM CDT	River Flood Warning	DMX	Humboldt	25 days
Mar 22, 4:34 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Wright	13 min
Mar 22, 4:55 PM CDT	Tornado Warning	DMX	Carroll, Crawford	35 min
Mar 22, 5:02 PM CDT	Tornado Warning	DMX	Adair, Adams, Cass	43 min
Mar 22, 5:07 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass, Guthrie	23 min
Mar 22, 5:18 PM CDT	Tornado Warning	DMX	Audubon, Cass, Guthrie	27 min
Mar 22, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Greene	33 min
Mar 22, 5:29 PM CDT	Tornado Warning	DMX	Crawford	35 min
Mar 22, 5:43 PM CDT	Tornado Warning	DMX	Audubon, Cass, Greene, Guthrie	15 min
Mar 22, 5:44 PM CDT	Tornado Warning	DMX	Adair, Madison	46 min
Mar 22, 5:47 PM CDT	Tornado Warning	DMX	Adams, Ringgold, Taylor, Union	43 min
Mar 22, 6:16 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk	44 min
Mar 22, 6:26 PM CDT	Tornado Warning	DMX	Dallas, Madison, Polk, Warren	49 min
Mar 22, 6:32 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Worth, Wright	28 min
Mar 22, 6:45 PM CDT	Tornado Warning	DMX	Clarke, Decatur, Ringgold	30 min
Mar 22, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Madison	25 min
Mar 22, 6:57 PM CDT	Tornado Warning	DMX	Adair, Madison, Union	33 min

Nearby

Tornado Warnings in Iowa, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.