Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 44, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jun 21, 2011, 12:14 AM CDT for Grundy County, Hardin County, Iowa. It was in force for 31 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 21, 2011, 12:14 AM CDT (05:14 UTC)
- Expired
- Jun 21, 2011, 12:45 AM CDT
- In force
- 31 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Grundy County, IA, Hardin County, IA
The radar
The Des Moines radar (KDMX), 84 km from the middle of the area, began a volume at 05:15 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 21, 12:21 AM CDT | FUNNEL CLOUD | 7 Sw Eldora, IA | |
| Jun 21, 12:22 AM CDT | TORNADO | 4 S Eldora, IA | TOUCHDOWN DIFFICULT TO SEE BUT IS VISIBLE THROUGH LIGHTNING |
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 20, 10:58 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 5.2 hours before the alert went out and 224 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
- 2585 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 12.8
The text
As transmitted, in the capitals the NWS used until 2016.
987
WFUS53 KDMX 210514
TORDMX
IAC075-083-210545-
/O.NEW.KDMX.TO.W.0044.110621T0514Z-110621T0545Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1214 AM CDT TUE JUN 21 2011
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
WESTERN GRUNDY COUNTY IN CENTRAL IOWA...
SOUTHEASTERN HARDIN COUNTY IN CENTRAL IOWA...
* UNTIL 1245 AM CDT
* AT 1211 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 11 MILES SOUTHWEST OF ELDORA...OR 20 MILES SOUTH
OF IOWA FALLS...AND MOVING EAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
ELDORA...GRUNDY CENTER...NEW PROVIDENCE...UNION...WHITTEN...
STEAMBOAT ROCK...WELLSBURG AND HOLLAND.
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.
TORNADOES ARE DIFFICULT TO SEE AT NIGHT...ACT QUICKLY. TAKE COVER
NOW!
&&
LAT...LON 4221 9303 4221 9327 4227 9331 4252 9295
4234 9272
TIME...MOT...LOC 0515Z 248DEG 31KT 4225 9319
$$
DONAVON3 follow-up statements
427 WWUS53 KDMX 210525 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1225 AM CDT TUE JUN 21 2011 IAC075-083-210545- /O.CON.KDMX.TO.W.0044.000000T0000Z-110621T0545Z/ HARDIN IA-GRUNDY IA- 1225 AM CDT TUE JUN 21 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN GRUNDY AND SOUTHEASTERN HARDIN COUNTIES UNTIL 1245 AM CDT... AT 1225 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO. THIS TORNADO WAS LOCATED NEAR ELDORA...OR 18 MILES SOUTHEAST OF IOWA FALLS...MOVING NORTHEAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... GRUNDY CENTER...STEAMBOAT ROCK...WELLSBURG AND HOLLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT... OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE LOWEST SPOT AVAILABLE AND COVER YOUR HEAD. TORNADOES ARE DIFFICULT TO SEE AT NIGHT...ACT QUICKLY. TAKE COVER NOW. && LAT...LON 4221 9303 4234 9321 4252 9295 4234 9272 TIME...MOT...LOC 0526Z 238DEG 44KT 4233 9302 $$ DONAVON
774
WWUS53 KDMX 210536
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1236 AM CDT TUE JUN 21 2011
IAC083-210546-
/O.CAN.KDMX.TO.W.0044.000000T0000Z-110621T0545Z/
HARDIN IA-
1236 AM CDT TUE JUN 21 2011
...THE TORNADO WARNING FOR SOUTHEASTERN HARDIN COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4234 9272 4222 9300 4247 9300 4247 9302
4252 9295
TIME...MOT...LOC 0536Z 235DEG 40KT 4237 9290
$$
IAC075-210545-
/O.CON.KDMX.TO.W.0044.000000T0000Z-110621T0545Z/
GRUNDY IA-
1236 AM CDT TUE JUN 21 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN GRUNDY COUNTY
UNTIL 1245 AM CDT...
AT 1234 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO. THIS
TORNADO WAS LOCATED 8 MILES WEST OF GRUNDY CENTER...OR 21 MILES
SOUTHEAST OF IOWA FALLS...MOVING NORTHEAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
GRUNDY CENTER...WELLSBURG AND HOLLAND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT...
OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS.
IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK
SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE
LOWEST SPOT AVAILABLE AND COVER YOUR HEAD.
TORNADOES ARE DIFFICULT TO SEE AT NIGHT...ACT QUICKLY. TAKE COVER
NOW.
&&
LAT...LON 4234 9272 4222 9300 4247 9300 4247 9302
4252 9295
TIME...MOT...LOC 0536Z 235DEG 40KT 4237 9290
$$
DONAVON202
WWUS53 KDMX 210546 RRA
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1246 AM CDT TUE JUN 21 2011
IAC075-210557-
/O.EXP.KDMX.TO.W.0044.000000T0000Z-110621T0545Z/
GRUNDY IA-
1246 AM CDT TUE JUN 21 2011
...THE TORNADO WARNING FOR WESTERN GRUNDY COUNTY HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT!
LAT...LON 4234 9272 4222 9300 4247 9300 4247 9302
4252 9295
TIME...MOT...LOC 0536Z 235DEG 40KT 4237 9290
$$The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 8:32 PM CDT | River Flood Warning | DMX | Mahaska, Marion | 7 hr |
| Jun 20, 8:32 PM CDT | River Flood Warning | DMX | Lucas, Wayne | 11 hr |
| Jun 20, 8:43 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 47 min |
| Jun 20, 9:30 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 45 min |
| Jun 20, 9:33 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Greene, Sac | 42 min |
| Jun 20, 10:00 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Taylor | 30 min |
| Jun 20, 10:16 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Boone, Carroll, Cass, Dallas and 3 more | 44 min |
| Jun 20, 10:19 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene, Pocahontas, Sac, Webster | 41 min |
| Jun 20, 10:31 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Madison, Taylor, Union | 29 min |
| Jun 20, 10:57 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Humboldt, Kossuth, Palo Alto, Pocahontas | 48 min |
| Jun 20, 11:26 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 49 min |
| Jun 20, 11:34 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 26 min |
| Jun 20, 11:37 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Hancock, Kossuth, Winnebago | 23 min |
| Jun 20, 11:49 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story | 41 min |
| Jun 20, 11:52 PM CDT | Tornado Warning | DMX | Jasper, Marshall, Polk, Story | 23 min |
| Jun 21, 12:13 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago, Worth | 47 min |
| Jun 21, 12:22 AM CDT | Tornado Warning | DMX | Grundy, Marshall | 23 min |
| Jun 21, 12:35 AM CDT | Tornado Warning | DMX | Jasper, Marshall, Tama | 25 min |
| Jun 21, 12:39 AM CDT | Tornado Warning | DMX | Grundy, Marshall, Tama | 36 min |
| Jun 21, 12:41 AM CDT | Tornado Warning | DMX | Butler | 34 min |
| Jun 21, 1:02 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 28 min |
| Jun 21, 1:04 AM CDT | Tornado Warning | DMX | Tama | 27 min |
| Jun 21, 11:15 AM CDT | River Flood Warning | DMX | Palo Alto | 7 days |
| Jun 21, 11:15 AM CDT | River Flood Warning | DMX | Boone, Hamilton, Webster | 11 days |
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.