Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 10, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Mar 22, 2011, 6:45 PM CDT for Clarke County, Decatur County, Ringgold County, Iowa. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 22, 2011, 6:45 PM CDT (23:45 UTC)
- Expired
- Mar 22, 2011, 7:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Clarke County, IA, Decatur County, IA, Ringgold County, IA
The radar
The Des Moines radar (KDMX), 119 km from the middle of the area, began a volume at 23:47 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.
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, 11.8 hours before the alert went out and 206 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.
460
WFUS53 KDMX 222345
TORDMX
IAC039-053-159-230015-
/O.NEW.KDMX.TO.W.0010.110322T2345Z-110323T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
645 PM CDT TUE MAR 22 2011
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
SOUTH CENTRAL CLARKE COUNTY IN SOUTH CENTRAL IOWA...
DECATUR COUNTY IN SOUTH CENTRAL IOWA...
SOUTHEASTERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL 715 PM CDT
* AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 9 MILES SOUTHEAST OF MOUNT AYR...OR 12 MILES WEST
OF LAMONI...AND MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
LAMONI...LEON...KELLERTON...LAMONI AIRPORT...BEACONSFIELD...GRAND
RIVER...DECATUR CITY AND VAN WERT.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 8 AND 25.
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.
&&
LAT...LON 4062 9430 4099 9387 4078 9363 4057 9400
4056 9423
TIME...MOT...LOC 2345Z 224DEG 35KT 4062 9414
$$
JOHNSON2 follow-up statements
009
WWUS53 KDMX 222354
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
654 PM CDT TUE MAR 22 2011
IAC039-053-159-230015-
/O.CON.KDMX.TO.W.0010.000000T0000Z-110323T0015Z/
DECATUR IA-RINGGOLD IA-CLARKE IA-
654 PM CDT TUE MAR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL CLARKE...
SOUTHEASTERN RINGGOLD AND DECATUR COUNTIES UNTIL 715 PM CDT...
AT 651 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 6 MILES NORTHWEST OF LAMONI...MOVING NORTHEAST AT
50 MPH.
LOCATIONS IMPACTED INCLUDE...
LEON...GRAND RIVER...DECATUR CITY AND VAN WERT.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 8 AND 26.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.
IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.
&&
LAT...LON 4057 9414 4070 9421 4099 9387 4078 9363
4057 9400
TIME...MOT...LOC 2354Z 236DEG 42KT 4071 9398
$$407
WWUS53 KDMX 230004
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
704 PM CDT TUE MAR 22 2011
IAC159-230013-
/O.CAN.KDMX.TO.W.0010.000000T0000Z-110323T0015Z/
RINGGOLD IA-
704 PM CDT TUE MAR 22 2011
...THE TORNADO WARNING FOR SOUTHEASTERN RINGGOLD COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4064 9402 4086 9401 4099 9387 4078 9363
4057 9400
TIME...MOT...LOC 0003Z 236DEG 42KT 4075 9392
$$
IAC039-053-230015-
/O.CON.KDMX.TO.W.0010.000000T0000Z-110323T0015Z/
DECATUR IA-CLARKE IA-
704 PM CDT TUE MAR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL CLARKE AND
DECATUR COUNTIES UNTIL 715 PM CDT...
AT 700 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 8 MILES NORTH OF LAMONI...MOVING NORTHEAST AT 50
MPH.
LOCATIONS IMPACTED INCLUDE...
LEON...GRAND RIVER...DECATUR CITY AND VAN WERT.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 8 AND 25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.
IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.
&&
LAT...LON 4064 9402 4086 9401 4099 9387 4078 9363
4057 9400
TIME...MOT...LOC 0003Z 236DEG 42KT 4075 9392
$$
JOHNSONThe 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, 6:27 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, 6:50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.