Alert archive / Iowa / Tornado Warnings in 2011

Tornado Warning 2, NWS Des Moines, IA

March 22, 2011Adair County, Adams County, Cass County, Iowa

NWS Des Moines, IA issued this tornado warning at Mar 22, 2011, 5:02 PM CDT for Adair County, Adams County, Cass County, Iowa. It was in force for 43 min. 12 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, 5:02 PM CDT (22:02 UTC)
Expired: Mar 22, 2011, 5:45 PM CDT
In force: 43 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Adair County, IA, Adams County, IA, Cass County, IA

The radar

The Des Moines radar (KDMX), 100 km from the middle of the area, began a volume at 22:05 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
Mar 22, 5:05 PM CDT	HAIL 1	3 S Griswold, IA	1 INCH HAIL
Mar 22, 5:13 PM CDT	TSTM WND GST 60	4 S Cumberland, IA	SUSTAINED WINDS OF 45 TO 50 MPH.
Mar 22, 5:13 PM CDT	HAIL 0.75	4 S Cumberland, IA
Mar 22, 5:22 PM CDT	TSTM WND DMG	1 Sw Cumberland, IA	SHED BLOWN DOWN APPROXIMATELY 1 MILE WEST OF HIGHWAY 92 AND COUNTY ROAD N28. DELAYED REPORT. TIME APPROXIMATE.
Mar 22, 5:23 PM CDT	HAIL 1.5	4 S Cumberland, IA	QUARTER TO PING PONG BALL SIZED HAIL.
Mar 22, 5:30 PM CDT	TORNADO 1	4 Sse Massena, IA	NWS STORM SURVEY TEAM RATED THIS TORNADO AN EF1 WITH PEAK WINDS OF 89 MPH. CONTINUOUS 2 1/2 MILE PATH. MOST DAMAGE WAS EF0 WITH ONE LOCALIZED EF1 DAMAGE. REFER TO THE NEWS STORY AT WWW.WEATHER.GOV/DMX.
Mar 22, 5:35 PM CDT	HAIL 0.75	6 W Greenfield, IA
Mar 22, 5:44 PM CDT	HAIL 1.75	6 W Greenfield, IA
Mar 22, 5:45 PM CDT	TORNADO	Bridgewater, IA	TORNADO NEAR DELTA AVE AND HIGHWAY 92 ...
Mar 22, 5:49 PM CDT	HAIL 1.75	Bridgewater, IA
Mar 22, 5:50 PM CDT	HAIL 1	1 Ne Bridgewater, IA
Mar 22, 5:55 PM CDT	HAIL 0.25	2 S Griswold, IA

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, 10.0 hours before the alert went out and 137 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.

070 
WFUS53 KDMX 222202
TORDMX
IAC001-003-029-222245-
/O.NEW.KDMX.TO.W.0002.110322T2202Z-110322T2245Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  ADAIR COUNTY IN SOUTHWEST IOWA...
  NORTHERN ADAMS COUNTY IN SOUTHWEST IOWA...
  SOUTHEASTERN CASS COUNTY IN SOUTHWEST IOWA...

* UNTIL 545 PM CDT

* AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES NORTH OF STANTON...OR 23 MILES NORTH OF
  CLARINDA...AND MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GREENFIELD...CARBON...CUMBERLAND...MASSENA...WIOTA...BRIDGEWATER...
  ANITA...FONTANELLE AND ORIENT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 81.

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 4147 9481 4151 9455 4118 9430 4116 9437
      4116 9448 4113 9448 4100 9494 4115 9494
      4116 9517 4121 9517
TIME...MOT...LOC 2202Z 235DEG 58KT 4109 9502

$$

DONAVON

4 follow-up statements

380 
WWUS53 KDMX 222215
SVSDMX

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

IAC001-003-029-222245-
/O.CON.KDMX.TO.W.0002.000000T0000Z-110322T2245Z/
ADAMS IA-ADAIR IA-CASS IA-
515 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN CASS...ADAIR
AND NORTHERN ADAMS COUNTIES UNTIL 545 PM CDT...

AT 513 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 13 MILES NORTHWEST OF CORNING...OR 20 MILES SOUTH
OF ATLANTIC...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENFIELD...CUMBERLAND...WIOTA...MASSENA...BRIDGEWATER...ANITA...
  FONTANELLE AND ORIENT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 81.

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 4147 9481 4151 9455 4118 9430 4116 9437
      4116 9448 4113 9448 4100 9494 4115 9494
      4116 9517 4121 9517
TIME...MOT...LOC 2216Z 242DEG 43KT 4113 9488

$$

DONAVON

939 
WWUS53 KDMX 222223
SVSDMX

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

IAC001-003-029-222245-
/O.CON.KDMX.TO.W.0002.000000T0000Z-110322T2245Z/
ADAMS IA-ADAIR IA-CASS IA-
523 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN CASS...ADAIR AND
NORTHERN ADAMS COUNTIES UNTIL 545 PM CDT...

AT 522 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 12 MILES NORTH OF CORNING...OR 20 MILES SOUTHEAST
OF ATLANTIC...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENFIELD...MASSENA...BRIDGEWATER...ANITA...FONTANELLE AND ORIENT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 81.

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 4100 9494 4115 9494 4128 9503 4147 9481
      4151 9455 4118 9430 4116 9437 4116 9448
      4113 9448
TIME...MOT...LOC 2223Z 242DEG 43KT 4117 9478

$$

DONAVON

173 
WWUS53 KDMX 222228
SVSDMX

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

IAC001-003-029-222245-
/O.CON.KDMX.TO.W.0002.000000T0000Z-110322T2245Z/
ADAMS IA-ADAIR IA-CASS IA-
528 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN CASS...ADAIR
AND NORTHERN ADAMS COUNTIES UNTIL 545 PM CDT...

AT 526 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 11 MILES NORTH OF CORNING...OR 21 MILES SOUTHEAST
OF ATLANTIC...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENFIELD...WIOTA...MASSENA...BRIDGEWATER...ANITA...FONTANELLE AND
  ORIENT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 81.

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 4147 9481 4151 9455 4118 9430 4116 9437
      4116 9448 4113 9448 4100 9494 4115 9494
      4116 9517 4121 9517
TIME...MOT...LOC 2228Z 243DEG 31KT 4116 9476

$$

775 
WWUS53 KDMX 222235
SVSDMX

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

IAC001-003-029-222245-
/O.CON.KDMX.TO.W.0002.000000T0000Z-110322T2245Z/
ADAMS IA-ADAIR IA-CASS IA-
535 PM CDT TUE MAR 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN CASS...ADAIR AND
NORTHERN ADAMS COUNTIES UNTIL 545 PM CDT...

AT 534 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 13 MILES NORTH OF CORNING...OR 19 MILES NORTHWEST
OF CRESTON...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENFIELD...BRIDGEWATER...ANITA...FONTANELLE AND ORIENT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 81.

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 4100 9494 4138 9494 4147 9481 4151 9455
      4118 9430 4116 9437 4116 9448 4113 9448
TIME...MOT...LOC 2236Z 243DEG 31KT 4119 9468

$$

DONAVON

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, 5:07 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, 6:27 PM CDT	Tornado Warning	DMX	Adair, Clarke, Madison, Union, Warren	39 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.