Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Mar 22, 2011, 6:26 PM CDT for 4 counties in Iowa. It was in force for 49 min. 10 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, 6:26 PM CDT (23:26 UTC)
- Expired
- Mar 22, 2011, 7:15 PM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Dallas County, IA, Madison County, IA, Polk County, IA, Warren County, IA
The radar
The Des Moines radar (KDMX), 31 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, 6:28 PM CDT | TORNADO | 6 N Winterset, IA | OUTBUILDING DEBRIS AND TREE DAMAGE STREWN OVER HIGHWAY 169. REPORTED BY OFF DUTY NWS EMPLOYEE. |
| Mar 22, 6:37 PM CDT | TORNADO | 6 Sse De Soto, IA | DAMAGE TO A BUILDING. ROOF BLOWN OFF INTO THE FRONT YARD. |
| Mar 22, 6:49 PM CDT | HAIL 1 | West Des Moines, IA | |
| Mar 22, 6:54 PM CDT | FUNNEL CLOUD | 5 W Norwalk, IA | |
| Mar 22, 6:57 PM CDT | FUNNEL CLOUD | Norwalk, IA | LOCATED ALONG 2000 BLOCK OF COUNTY RD R45. |
| Mar 22, 7:00 PM CDT | FUNNEL CLOUD | 4 S Des Moines Int Airp, IA | BRIEF FUNNEL FORMED AND DISSIPATED. NO TOUCHDOWN. |
| Mar 22, 7:01 PM CDT | HAIL 0.25 | Des Moines, IA | DES MOINES AIRPORT |
| Mar 22, 7:07 PM CDT | HAIL 0.75 | 5 Wnw Des Moines, IA | |
| Mar 22, 7:17 PM CDT | HAIL 1 | 6 S Earlham, IA | |
| Mar 22, 7:18 PM CDT | FUNNEL CLOUD | 5 Nnw Des Moines, IA | SPOTTER WAS OUTDOORS WATCHING WATER PONDING ON THE ROAD AND LOOKED UP TO SEE A ROTATING WALL CLOUD. FUNNEL CLOUD BRIEFLY DEVELOPED THEN WENT BACK IN THE CLOUD. |
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, 11.4 hours before the alert went out and 212 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
617 WFUS53 KDMX 222326 TORDMX IAC049-121-153-181-230015- /O.NEW.KDMX.TO.W.0008.110322T2326Z-110323T0015Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 626 PM CDT TUE MAR 22 2011 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN DALLAS COUNTY IN CENTRAL IOWA... NORTHERN MADISON COUNTY IN SOUTH CENTRAL IOWA... SOUTHERN POLK COUNTY IN CENTRAL IOWA... NORTHERN WARREN COUNTY IN SOUTH CENTRAL IOWA... * UNTIL 715 PM CDT * AT 624 PM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO 6 MILES NORTHWEST OF WINTERSET...OR 27 MILES SOUTHWEST OF DES MOINES. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... DES MOINES...WEST DES MOINES...NORWALK...WINDSOR HEIGHTS... CARLISLE...PLEASANT HILL...ALTOONA...BONDURANT...VAN METER... MARTENSDALE...CUMMING...SPRING HILL...DES MOINES INT AIRPORT... MITCHELLVILLE...RUNNELLS AND HARTFORD. THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 113 AND 148. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 58 AND 88. THIS INCLUDES INTERSTATE 235 BETWEEN MILE MARKERS 1 AND 14. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. 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. TO REPEAT...A TORNADO IS ON THE GROUND. IN ADDITION TO THE TORNADO... THIS STORM IS ALSO EXPECTED TO PRODUCE GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS. && LAT...LON 4134 9414 4147 9419 4174 9336 4141 9333 TIME...MOT...LOC 2326Z 246DEG 32KT 4141 9405 $$ DONAVON
2 follow-up statements
825 WWUS53 KDMX 222352 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 652 PM CDT TUE MAR 22 2011 IAC049-121-153-181-230015- /O.CON.KDMX.TO.W.0008.000000T0000Z-110323T0015Z/ POLK IA-DALLAS IA-MADISON IA-WARREN IA- 652 PM CDT TUE MAR 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN WARREN...NORTHERN MADISON...SOUTHEASTERN DALLAS AND SOUTHERN POLK COUNTIES UNTIL 715 PM CDT... AT 651 PM CDT...EMERGENCY MANAGEMENT REPORTED A TORNADO. THIS TORNADO WAS LOCATED NEAR NORWALK...OR 7 MILES SOUTHWEST OF DES MOINES...MOVING EAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... DES MOINES...WINDSOR HEIGHTS...CARLISLE...PLEASANT HILL... ALTOONA...BONDURANT...DES MOINES INT AIRPORT...HARTFORD...RUNNELLS AND MITCHELLVILLE. THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 113 AND 149. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 58 AND 89. THIS INCLUDES INTERSTATE 235 BETWEEN MILE MARKERS 1 AND 14. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS ALSO EXPECTED TO PRODUCE GOLF BALL SIZE HAIL AND WIDESPREAD DESTRUCTIVE WINDS. && LAT...LON 4134 9414 4152 9404 4174 9336 4141 9333 TIME...MOT...LOC 2352Z 251DEG 44KT 4152 9371 $$
765 WWUS53 KDMX 230012 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 712 PM CDT TUE MAR 22 2011 IAC049-121-153-181-230022- /O.EXP.KDMX.TO.W.0008.000000T0000Z-110323T0015Z/ POLK IA-DALLAS IA-MADISON IA-WARREN IA- 712 PM CDT TUE MAR 22 2011 THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 112 AND 149. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 58 AND 89. THIS INCLUDES INTERSTATE 235 BETWEEN MILE MARKERS 1 AND 14. ...THE TORNADO WARNING FOR NORTHERN WARREN...NORTHERN MADISON... SOUTHEASTERN DALLAS AND SOUTHERN POLK COUNTIES WILL EXPIRE AT 715 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CDT. LAT...LON 4134 9414 4152 9404 4174 9336 4141 9333 TIME...MOT...LOC 0012Z 251DEG 44KT 4160 9340 $$ 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, 6:27 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, 2011Every tornado warning in 2011Tornadoes 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.